taxonID	type	description	language	source
03860122FF8DFF894CB7F9B97E601EFF.taxon	description	Figures 1, 2, 10, 13, 33. https: // zoobank. org / NomenclaturalActs / 778 eaa 0 e-e 797 - 44 f 5 - 85 fa-adb 2433 b 3693	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF8DFF894CB7F9B97E601EFF.taxon	diagnosis	Diagnosis. The external anatomy of Acronyctodes gabrieli closely resembles that of its putative sister species, A. leonilaria and A. mexicanaria. However, these species can be partially distinguished by their geographical distributions: A. leonilaria is primarily found in the Mexican Plateau region, A. mexicanaria in the Trans-Mexican Volcanic Belt, Sierra Madre del Sur, and the southern Sierra Madre Oriental, and A. gabrieli appears to be associated with the Sierra Madre Occidental. Like other members of the Mexicanaria-group, the most reliable method of differentiation is through the examination of male genitalia (Granillo-Hernández et al. 2024). Acronyctodes gabrieli is characterized by a narrower, triangular uncus, a large gnathos with a strongly papillated medial process, a highly sclerotized, rugose juxta (see arrow, Figure 10 a), and a straight, posteriorly directed, sclerotized process at the end of the aedeagus (see arrow, Figure 10 b). In contrast, A. mexicanaria has a thicker, campaniform uncus, a smaller gnathos, a more reduced and less sclerotized juxta (see arrow, Figure 12 a), and a curved, sickle-shaped process at the end of the aedeagus (see arrow, Figure 12 b). Acronyctodes leonilaria also possesses a campaniform uncus and a smaller gnathos, but its juxta is large and plate-like (see arrow, Figure 11 a), and the process at the end of the aedeagus is straight (see arrow, Figure 11 b). In females of the Mexicanaria-group (Figures 13 – 15), the genitalia are largely similar and difficult to differentiate. Acronyctodes gabrieli and A. leonilaria do, however, appear to have a larger, more extended ductus bursae than A. mexicanaria. Although the caterpillars of A. mexicanaria and A. leonilaria are two of the most well-known in Mexico (Granillo-Hernández et al. 2024), there are, so far, no collections of A. gabrieli to compare with these. However, the larva shown in Figure 25 is a potential candidate for this species. Adult. (Figure 2). Forewing length: male: 21 – 23 mm; female: 23 – 24 mm.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF8DFF894CB7F9B97E601EFF.taxon	description	Head: Antenna bipectinate in both sexes; rami of male slightly longer than those of female; scales above black to gray-black. Frons and vertex mostly light grayish-white, however, scales around perimeter of eye dark gray to black. Labial palpus subequal to diameter of eye, light gray to black. Haustellum well-developed. Thorax: Grayish-white. Legs dark gray to black and modestly banded with pale grayish-white scales. Males with small hair pencil tucked inside groove on inner surface of hind tibia. Epiphysis well-developed. Tibial spur formula 0 - 2 - 4. Forewing grayish-white with dentate black antemedial and postmedial lines and black discal spot. Medial area between antemedial and postmedial lines of slightly more brown hue. Basal area along costa and post-discal area often blackened in upper third of wing. Basal half of terminal area darker and more brownish-gray than pale grayish-white distal half. Hindwing grayish-white with transverse medial black dentate line and black discal spot. Posterior half of wings lightly speckled with black scales. Undersides of both wings like uppersides but pattern elements and colors more muted. Fringe checkered in both wings. Abdomen: Grayish-white. Male genitalia: (Figure 10). Uncus triangulate. Medial posterior projection of gnathos papillated. Juxta large, highly sclerotized and papillated, and apically blunt. Valve broad and without noticeable acuminate process at apex. Aedeagus with straight, posteriorly directed, sclerotized process between two, lateral, well sclerotized serrate processes; vesica with ca. 30 spinose cornuti in tight cluster. Female genitalia: (Figure 13). Similar to A. leonilaria and A. mexicanaria. Posterior apophysis ca. one third length of anterior apophysis. Sterigma with bulbous lamella postvaginalis bearing concentric folds; lamella antevaginalis wide and sclerotized. Ductus bursae highly sclerotized; manifesting as prominent tongue-like process. Corpus bursae highly sclerotized with longitudinal striations in posterior portion and more membranous and spherical in anterior portion; signum absent.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF8DFF894CB7F9B97E601EFF.taxon	materials_examined	Holotype. ♂, MEXICO: Sonora, Mpo. Nacori Chico, Ejido Mesa Tres Rios, Arroyo La Presita, 3.3 km (by air) SSW Mesa Tres Rios, N 29 ° 48 ’ 33 ”, W 108 ° 43 ’ 12 ” [29.8092 °, - 108.72 °], Pine / oak / cedar riparian woodland, [elev.] 5600 ft, MV light, 5 - 10 - VIII- 2018, leg. J. Palting, Molecular Voucher: TAM 0219 (MXGEO 097 - 23), [USNM]. Paratypes (8 ♂, 3 ♀). 8 ♂, 3 ♀, MEXICO: same collection data as holotype except: “ Genitalia Slide: TAM- 2022 - 168 [♂], ” “ Genitalia Slide: TAM- 2023 - 222 [♀], ” “ Genitalia Slide: TAM- 2023 - 232 [♂], ” “ Genitalia Slide: TAM- 2023 - 233 [♀], ” [CNIN, USNM].	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF8DFF894CB7F9B97E601EFF.taxon	distribution	Distribution. (Fig. 33). So far, A. gabrieli is only known from the Sierra Madre Occidental pine-oak forests at the type locality. However, it is expected to have a distribution that extends southward through the Sierra Madre Occidental.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF8DFF894CB7F9B97E601EFF.taxon	biology_ecology	Biology. The immature stages and life history of A. gabrieli remain unknown. However, Figure 25 depicts a potential candidate for its larva: an Acronyctodes caterpillar observed in Urique, Chihuahua. Given that A. gabrieli is the only known Acronyctodes species in the region and the larva’s phenotypic similarity to the closely related A. leonilaria, this specimen is a strong candidate for its caterpillar.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF8DFF894CB7F9B97E601EFF.taxon	etymology	Etymology. The specific epithet gabrieli is named in honor of botanist Gabriel Trujillo, who tragically lost his life while conducting his graduate fieldwork in the canyons of Sonora, Mexico. This name serves as a tribute to his legacy, and dedication and passion for botanical research in the very region where this moth, now bearing his name, was discovered.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF8DFF894CB7F9B97E601EFF.taxon	discussion	Remarks. One paratype female is missing its abdomen.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	description	Figures 1, 5, 16, 21, 26, 34. https: // zoobank. org / NomenclaturalActs / 63779 c 9 a-f 7 f 0 - 416 e-a 29 a-eeacf 114 b 07 b	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	diagnosis	Diagnosis. Acronyctodes asignum cannot be reliably distinguished from A. cautama, A. colorata, and A. corrugata based on external appearance. Confidence in identification typically requires genitalic dissection and / or DNA barcoding. Our limited sampling suggests that A. asignum primarily inhabits the Guanacaste and Central Cordilleras of Costa Rica, while A. colorata is found in the Talamanca Cordillera of Costa Rica and Panama, and A. corrugata ranges more widely across the Central American montane and pine-oak forests of southern Mexico, Guatemala, El Salvador, Honduras, and possibly Nicaragua. Acronyctodes cautama is thus far only known from Mexico, west of the Isthmus of Tehuantepec. The female genitalia of A. asignum are immediately diagnostic among the known members of the Cautama-group, as it is the only member lacking a signum on the corpus bursae (Fig. 21). In contrast, the male genitalia are less distinctive and often exhibit transitional characteristics towards other members of the Cautama-group, necessitating caution when using them as definitive identifiers. However, there appears to be notable differences in the arrangement and number of cornuti among the species. Acronyctodes asignum typically has 12 – 15 cornuti arranged in a mostly linear fashion on the vesica (Fig. 16 b). In comparison, A. colorata usually has 30 – 35 cornuti in a dense non-linear cluster (Fig. 19 b), A. corrugata has 10 – 15 cornuti in a mostly linear cluster (Fig. 17 b), A. cautama has 7 – 10 in a linear cluster (Fig. 18 b), and A. bisbili has approximately 25 – 30 cornuti in a non-linear cluster (Fig. 20 b). Additionally, the apex of the valve in A. asignum, A. corrugata, and A. cautama is slightly angulated, whereas in A. bisbili and A. colorata, it appears entirely rounded (Figs. 16 a – 20 a).	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	description	Adult. (Figure 5). Forewing length: male: 18 – 22 mm; female: 23 – 26 mm. Head: Antenna bipectinate in both sexes; rami of male about 3 x longer than those of female; scales above ochreous with scattered black scales. Frons and vertex ochreous gray. Labial palpus 1.5 x diameter of eye, ochreous gray. Haustellum well-developed. Thorax: Tan to ochreous gray. Legs tan to ochreous gray, mottled with dark gray to black patches. Males with small hair pencil tucked inside groove on inner surface of hind tibia. Epiphysis well-developed. Tibial spur formula 0 - 2 - 4. Forewing grayish tan, variable amounts of brown and olive green; smooth antemedial line, modestly dentate postmedial line. Medial area between antemedial and postmedial lines slightly browner. Black discal spot present and post-discal area near discal spot with blackened patch. Subtle, diffused darkened medial line sometimes present near postmedial line. Hindwing grayish-tan with transverse medial black dentate line and black discal spot; discal spot may have additional subtle transverse line through it. Underside of both wings like upperside but with pattern elements more spotty and color highly variable. Fringe sometimes with light checkering. Abdomen: Pale gray to tan. Male genitalia: (Figure 16). Uncus triangulate and campanulated, ending in hood-like apex. Medial posterior projection of gnathos papillated. Valve broad with costal sclerite ending in subapical acuminate process. Juxta plate-like with large posterior digitate process. Vesica with ca. 12 – 15 spinose cornuti in tight, mostly linear, cluster. Female genitalia: (Figure 21). Posterior apophysis ca. one half length of anterior apophysis. Ductus bursae with anterior sclerite. Corpus bursae ovate and entirely membraneous; signum absent. Larva: (Figure 26). Head black with white suture separating frons and lobes; clypeus white. Body predominantly jet black, with mottled orange markings throughout thorax and A 1, and at posterior end from A 6 onward. Broken middorsal and subdorsal white pinstripes extend primarily across A 1 – A 5, transitioning to yellow toward front and rear of body. Spiracles black; spiracular area with large, ill-defined white and yellow streaked patches, interspersed with scattered black spots, particularly over A 2 – A 5. Prolegs yellow and black. Phenotype somewhat resembling A. cautama, but that species typically features a broad, mostly continuous white spiracular band across the mid-body. Additionally, the thorax and posterior body of A. cautama are less mottled with black and yellow and instead exhibit crisper, more defined black patches over the yellow areas.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	materials_examined	Holotype. ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 07 - IV- 2016, coll. Sergio Rios, Genitalia slide: TAM- 2023 - 329, 16 - SRNP- 101701, USNMENT 01947536, [USNM]. Paratypes (39 ♂, 24 ♀). ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Manta Claro, (10.80345 °, - 85.32621 °), el. 1610 m, 03 - III- 2011, coll. F. Quesada and H. Cambronero, 11 - SRNP- 101352, USNMENT 01947497; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 15 - VI- 2018, coll. S. Rios and H. Ramirez, 18 - SRNP- 104265, USNMENT 01947498; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Manta Claro, (10.80345 °, - 85.32621 °), el. 1610 m, 02 - II- 2011, coll. S. Rios and R. Franco, 11 - SRNP- 100639, USNMENT 01947499; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Manta Claro, (10.80345 °, - 85.32621 °), el. 1610 m, 02 - II- 2011, coll. S. Rios and R. Franco, 11 - SRNP- 100638, USNMENT 01947500; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 06 - IV- 2016, coll. Sergio Rios, 16 - SRNP- 101407, USNMENT 01947501; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 06 - IV- 2016, coll. Sergio Rios, 16 - SRNP- 101408, USNMENT 01947502; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 15 - VI- 2018, S. Rios and H. Ramirez, 18 - SRNP- 104264, USNMENT 01947503; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Derrumbe, (10.93110 °, - 85.46194 °), el. 1310 m, 11 - VII- 2010, coll. R. Franco and F. Quesada, 10 - SRNP- 110975, USNMENT 01947504; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 25 - VI- 2018, ecl. 02 - VIII- 2018, coll. Dunia Garcia, 18 - SRNP- 35309, USNMENT 01947505; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 25 - VI- 2018, ecl. 17 - VIII- 2018, coll. Dunia Garcia, 18 - SRNP- 35310, USNMENT 01947506, [missing abdomen]; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 01 - IV- 2017, coll. S. Rios, 17 - SRNP- 102033, USNMENT 01947507; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 17 - XI- 2017, coll. S. Rios and H. Ramirez, 17 - SRNP- 106962, USNMENT 01947508; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 01 - IV- 2017, coll. S. Rios, 17 - SRNP- 102028, USNMENT 01947509; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 01 - IV- 2017, coll. S. Rios, 17 - SRNP- 102029, USNMENT 01947510; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 27 - V- 2009, ecl. 06 - VIII- 2009, coll. Harry Ramirez, 09 - SRNP- 35911, USNMENT 01947511; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 08 - IX- 2010, ecl. 26 - X- 2010, coll. Manuel Pereira, 10 - SRNP- 36350, USNMENT 01947512; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 01 - IV- 2017, coll. S. Rios, 17 - SRNP- 102026, USNMENT 01947513; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 01 - IV- 2017, coll. S. Rios, 17 - SRNP- 102027, USNMENT 01947514; ♀, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 23 - VII- 2017, coll. S. Rios, 17 - SRNP- 105361, USNMENT 01947515; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 01 - IV- 2017, coll. S. Rios, 17 - SRNP- 102025, USNMENT 01947516; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 12 - IX- 2018, ecl. 03 - XI- 2018, coll. Harry Ramirez, 18 - SRNP- 35513, USNMENT 01947517; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 12 - IX- 2018, ecl. 13 - XI- 2018, coll. Harry Ramirez, 18 - SRNP- 35525, USNMENT 01947518; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 28 - IV- 2017, coll. S. Rios, 17 - SRNP- 102774, USNMENT 01947519; ♀, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 22 - VII- 2017, coll. S. Rios, 17 - SRNP- 105083, USNMENT 01947520; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 31 - III- 2017, coll. S. Rios, 17 - SRNP- 101872, USNMENT 01947521; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 31 - III- 2017, coll. S. Rios, 17 - SRNP- 101873, USNMENT 01947522; ♀, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 07 - II- 2016, coll. R. Franco and H. Cambronero, 16 - SRNP- 100096, USNMENT 01947523; ♀, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 07 - II- 2016, R. Franco and H. Cambronero, 16 - SRNP- 100097 USNMENT 01947524; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 21 - VII- 2017, coll. S. Rios, 17 - SRNP- 104659, USNMENT 01947525; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 12 - IX- 2018, ecl. 03 - XI- 2018, coll. Harry Ramirez, 18 - SRNP- 35515, USNMENT 01947526; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 21 - VII- 2017, coll. S. Rios, 17 - SRNP- 104657, USNMENT 01947527; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 21 - VII- 2017, coll. S. Rios, 17 - SRNP- 104658, USNMENT 01947528; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 16 - IV- 2018, coll. S. Rios, 18 - SRNP- 102007, USNMENT 01947529; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 07 - II- 2016, coll. R. Franco and H. Cambronero, 16 - SRNP- 100095, USNMENT 01947530; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 01 - IV- 2017, coll. S. Rios, 17 - SRNP- 102024, USNMENT 01947531; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 07 - IV- 2016, coll. Sergio Rios, 16 - SRNP- 101702, USNMENT 01947533; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 07 - IV- 2016, coll. Sergio Rios, 16 - SRNP- 101703, USNMENT 01947534; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 17 - VII- 2008, ecl. 27 - VIII- 2008, coll. Harry Ramirez, 08 - SRNP- 36083, USNMENT 01947537; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 27 - V- 2009, ecl. 31 - VII- 2009, coll. Harry Ramirez, Genitalia slide: TAM- 2023 - 328, 09 - SRNP- 35908, USNMENT 01947538; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 08 - IX- 2008, ecl. 24 - XI- 2008, coll. Manuel Pereira, 08 - SRNP- 36802, USNMENT 01947539; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 08 - IX- 2008, ecl. 20 - XI- 2008, coll. Manuel Pereira, 08 - SRNP- 36798, USNMENT 01947540; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Manta Sendero Perdido, (10.80639 °, - 85.32158 °), el. 1762 m, 03. III. 2011, coll. S. Rios and R. Franco, 11 - SRNP- 101286, USNMENT 01947541; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Derrumbe, (10.93110 °, - 85.46194 °), el. 1310 m, 10 - VII- 2010, coll. S. Rios and H. Cambronero, Genitalia slide: TAM- 2023 - 327, 10 - SRNP- 110548, USNMENT 01947542; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 19 - X- 1998, ecl. 11 - XII- 1998, coll. Mariano Pereira, 98 - SRNP- 15622, USNMENT 01947543; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 12 - X- 1998, ecl. 16 - XI- 1998, coll. Mariano Pereira, 98 - SRNP- 15511, USNMENT 01947544; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Manta Claro, (10.80345 °, - 85.32621 °), el. 1610 m, 02 - II- 2011, coll. S. Rios and R. Franco, 11 - SRNP- 100640, USNMENT 01947545; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 27 - V- 2009, ecl. 12 - VIII- 2009, coll. Harry Ramirez, Genitalia slide: TAM- 2023 - 330, 09 - SRNP- 35909, USNMENT 01947546; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 27 - V- 2009, ecl. 02 - VIII- 2009, coll. Harry Ramirez, 09 - SRNP- 35910, USNMENT 01947547; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 20 - IX- 1999, ecl. 09 - XI- 1999, coll. Mariano Pereira, 99 - SRNP- 1614, USNMENT 01947548; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 08 - IX- 2008, ecl. 08 - XI- 2008, coll. Manuel Pereira, 08 - SRNP- 36800, USNMENT 01947549; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Manta Sendero Perdido, (10.80639 °, - 85.32158 °), el. 1762 m, 02 - II- 2011, H. Cambronero and F. Quesada, 11 - SRNP- 100558, USNMENT 01947550; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 08 - II- 2016, coll. H. Cambronero and S. Rios, 16 - SRNP- 100362, USNMENT 01947551; ♂, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 08 - II- 2016, coll. H. Cambronero and S. Rios, 16 - SRNP- 100361, USNMENT 01947552; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 21 - X- 1997, ecl. 02 - XII- 1997, coll. Roster Moraga, 97 - SRNP- 1910, USNMENT 01947553; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 21 - X- 1997, ecl. 22 - XI- 1997, coll. Roster Moraga, 97 - SRNP- 1911, USNMENT 01947554; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 12 - X- 1998, ecl. 22 - XI- 1998, coll. Mariano Pereira, 98 - SRNP- 15512, USNMENT 01947555; ♀, COSTA RICA: Guanacaste, ACG, Santa Maria, Crater Bosque Sendero Adentro, (10.80348 °, - 85.32729 °), el. 1594 m, 08 - II- 2016, coll. H. Cambronero and S. Rios, 16 - SRNP- 100363, USNMENT 01947556; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 25 - VI- 2018, ecl. 02 - IX- 2018, coll. Dunia Garcia, 18 - SRNP- 35311, USNMENT 01947557; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 12 - IX- 2018, ecl. 04 - XI- 2018, coll. Harry Ramirez, 18 - SRNP- 35518, USNMENT 01947558; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 12 - IX- 2018, ecl. 10 - XII- 2018, coll. Harry Ramirez, 18 - SRNP- 35517, USNMENT 01947559; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 22 - IX- 1998, ecl. 30 - X- 1998, coll. Harry Ramirez, 98 - SRNP- 3700, USNMENT 01980000; ♀, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 08 - IX- 2008, ecl. 29 - XI- 2008, coll. Manuel Pereira, 08 - SRNP- 36799, USNMENT 01980001; ♂, COSTA RICA: Alajuela, ACG, Rincon Rain Forest, Wege, (10.96864 °, - 85.32046 °), el. 385 m, 19 - III- 2018, coll. R. Franco and H. Cambronero, 18 - SRNP- 101406, USNMENT 01980002; ♂, COSTA RICA: Guanacaste, ACG, Cacao, Sendero Cima, (10.93328 °, - 85.45729 °), el. 1460 m, On Schlegelia parviflora, 28 - IX- 1998, ecl. 04 - XI- 1998, coll. Harry Ramirez, 98 - SRNP- 3836, USNMENT 01980002.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	distribution	Distribution. (Fig. 34). Acronyctodes asignum has been documented in the Central and Guanacaste Cordilleras of Costa Rica, found at elevations ranging from 1300 to 1800 meters (approximately 4200 to 5900 feet).	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	biology_ecology	Biology. Daniel Janzen, Winnie Hallwachs, and ACG parataxonomists, have found 73 wild caterpillars of this species feeding on Schlegelia parviflora (Oerst.) Monach. (Schlegeliaceae), occasionally classified in Scrophulariaceae. To date, this plant remains the sole confirmed food record for this caterpillar, despite the presence of related plant genera in the vicinity.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	etymology	Etymology. The specific epithet asignum recognizes the absence (“ a- ” for “ without ”) of a signum in the female genitalia, distinguishing this species from visually similar known congeners.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF89FF844CB7FBBA7C491E23.taxon	materials_examined	Molecular data. Sixty-six specimens of A. asignum (BOLD BIN: BOLD: AAC 1083) have been DNA barcoded, revealing a pairwise distance of approximately 3 % from nearest-neighbor, A. colorata (BOLD BIN: BOLD: AAJ 6454).	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	description	Figures 1, 9, 20, 27, 35. https: // zoobank. org / NomenclaturalActs / 2 d 80 d 71 f- 9336 - 4 ce 8 - 80 fa- 5 b 7 d 87 b 1 e 596	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	diagnosis	Diagnosis. Acronyctodes bisbili is the smallest known species of the genus (Fig. 9), with male forewing lengths of 17 – 20 mm (n = 3). Currently, this species is only documented from the highlands of Chiapas, and its full distribution remains unclear. As with other species of Acronyctodes, the wing color pattern in A. bisbili does not appear to be diagnostic (Granillo-Hernández et al. 2024). However, the species can be reliably identified by features of the male genitalia, particularly its small size and unique structures. The uncus of A. bisbili is shorter and thinner with a triangular shape, whereas A. corrugata has a longer, thicker uncus. Additionally, the gnathos in A. corrugata is less expanded in its middle compared to A. bisbili. The most distinctive feature of the species lies in the number and arrangement of cornuti: A. corrugata has 10 – 15 cornuti arranged in a mostly linear pattern, whereas A. bisbili exhibits a dense, non-linear cluster of approximately 25 – 30 cornuti arranged at an acute angle.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	description	Adult. (Figure 9). Forewing length: male: 17 – 20 mm. Head: Covered by mostly brownish scales, antenna bipectinate. Vertex uniformly cream-colored. Labial palpus ochre-brown, equal to or longer than diameter of eye. Haustellum well-developed (± 10 mm). Thorax: Brownish. Legs with white and ochre scales. Epiphyses well-developed. Tibial spur formula 0 - 2 - 4. Forewing greenish-brown, with bold white subterminal zigzagged line and dark brown basal line. Greenish-brown discal spot in subapical area. Medial area between subterminal and basal lines with greenish-brown shades. Upperside of hindwing with dark brown and golden scales. Postmedial dentate line darker brown bordered by white scales. Underside of hindwing homogeneously beige and patterned with thin faint line in medial area and discontinuous dotted postmedial line. Abdomen: Pale gray to tan. Male genitalia: (Figure 20). Uncus triangulate and campanulated, ending in a beak shaped tip. Gnathos looped with sclerotized median area denticulate or spinulose. Valva broad with sclerotized costal margin and distal end finishing in spine-like border, internal region covered by long thin setae. Juxta rounded at base, extending ventrally ending as a cuspid or triangular process. Aedeagus short, thin, without processes, ending in finger-like extension. Vesica with ca. 25 – 30 spinose cornuti in a tight cluster arising from the opposite side of the caecum penis (basal opening of phallus) (Fig. 20 b). Larva: (Fig. 27) Head dark grey with black spots. Body creamy yellow with broad light grey dorsal, supraspiracular, subspiracular and ventral stripes, each bordered on each side by thin black stripes. White and yellow spiracular area, with some black spots around the spiracles, which turn orange from the sternite A 6. The pale colour of the head and body in Figure 27 could be the result of a molting larva. The caterpillar may be darker. The larva resembles A. corrugata, although our specimens of the latter have more pronounced black spots in the spiracular area. More larvae of both species are needed to draw definitive diagnostic conclusions.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	materials_examined	Holotype. ♂, MEXICO: Chiapas, Mpio. San Cristóbal de Las Casas, Parque Montetik, N 16 º 40 ’ 55.2 ”, W 92 º 35 ’ 56.4 ” [16.682 º, - 92.599 º], Pine / oak woodland, [elev.] 7874 ft, MV light, 20 - 21 - VII- 2022, leg. IJ Garzón, TA Matson, FR Joele & JJ Dombroskie. Paratypes. 2 ♂, same locality as holotype.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	distribution	Distribution. (Fig. 35). The range of Acronyctodes bisbili remains unclarified. Thus far, it is only known from the type locality in the pine-oak forests of San Cristóbal de las Casas, Chiapas.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	biology_ecology	Biology. A larva of Acronyctodes bisbili (Fig. 27) was collected from Tepozan (Buddleja cordata Kunth) (Scrophulariaceae) in late July of 2022 by authors TAM and IJGO. The larva struggled and was preserved in alcohol. A proleg was later sequenced to confirm its identity.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	etymology	Etymology. The name bisbili means “ striped ” in Tzeltal, an indigenous language of the Chiapan Highlands. The name references the striped pattern of the caterpillar.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	materials_examined	Molecular data. Three specimens of Acronyctodes bisbili were sequenced, including one larva and two adults. These specimens are assigned to BIN BOLD: AFA 3106, which exhibits a pairwise genetic distance of approximately 4 % from its nearest neighbor, Acronyctodes corrugata (BIN BOLD: AAZ 5681).	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF84FF824CB7FCC67FA11E0F.taxon	discussion	Remarks. The female of A. bisbili remains unknown. Additionally, the larval description, based on a single molting individual, should be interpreted with caution.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	description	Figures 1, 6, 17, 22, 28, 36. https: // zoobank. org / NomenclaturalActs / 3 c 455016 - 686 f- 4 e 11 - a 671 - b 40 cea 14 e 1 c 8	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	diagnosis	Diagnosis. Acronyctodes corrugata cannot be reliably distinguished from A. cautama, A. colorata, and A. asignum based on external appearance alone. Confidence in identification typically requires genitalic dissection and / or DNA barcoding. Our limited sampling suggests that A. corrugata ranges more widely across the Central American montane and pine-oak forests of southern Mexico, Guatemala, El Salvador, Honduras, and possibly Nicaragua. In contrast, A. asignum was found in the Guanacaste and Central Cordilleras of Costa Rica, and A. colorata in the Talamanca Cordillera of Costa Rica and Panama. Acronyctodes cautama is thus far only known from Mexico, west of the Isthmus of Tehuantepec. The female genitalia of A. corrugata (Fig. 22) are immediately diagnostic among the known members of the Cautama-group. The corpus bursae bears a spinate signum, and the posterior half is strongly sclerotized with deep longitudinal corrugations. In contrast, females of A. asignum have an entirely membranous corpus bursae and lack a signum, while females of A. colorata and A. cautama, although possessing a signum and a sclerotized posterior half of the corpus bursae, lack the deep longitudinal corrugations. The male genitalia are less distinctive and necessitate caution in identification. However, there appear to be notable differences in the arrangement and number of cornuti among species of the Cautama-group. Acronyctodes corrugata has 10 – 15 cornuti in a mostly linear cluster, A. cautama has 7 – 10 in a linear cluster, and A. asignum typically has 12 – 15 cornuti arranged in a mostly linear cluster. In contrast, A. colorata usually has 30 – 35 cornuti in a dense non-linear cluster, and A. bisbili has approximately 25 – 30 cornuti in a dense non-linear cluster. Additionally, the apex of the valve in A. asignum, A. corrugata, and A. cautama is slightly angulated, whereas in A. bisbili and A. colorata, it appears rounded.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	description	Adult. (Figure 6). Forewing length: male: 22 – 23 mm; female: 25 mm. Head: Antenna bipectinate in both sexes; rami of male about 3 x longer than those of female; scales above ochreous with scattered black scales. Frons and vertex ochreous gray. Labial palpus 1.5 x diameter of eye, ochreous gray. Haustellum well-developed. Thorax: Tan to ochreous gray. Legs tan to ochreous gray, mottled with dark gray to black patches. Males with small hair pencil tucked inside groove on inner surface of hind tibia. Epiphysis well-developed. Tibial spur formula 0 - 2 - 4. Forewing grayish tan, variable amounts of brown and olive green; smooth antemedial line, modestly dentate postmedial line. Medial area between antemedial and postmedial lines slightly browner. Black discal spot present and post-discal area near discal spot with blackened patch. Subtle, diffused darkened medial line sometimes present near postmedial line. Hindwing grayish-tan with transverse medial black dentate line and black discal spot; discal spot may have additional subtle transverse line through it. Underside of both wings like upperside but with pattern elements more spotty and color highly variable. Fringe sometimes with light checkering. Abdomen: Pale gray to tan. Male genitalia: (Figure 17). Uncus triangulate and campanulated, ending in hood-like apex. Medial posterior projection of gnathos papillated. Valve broad with costal sclerite ending in subapical acuminate process. Juxta plate-like with large posterior digitate process. Vesica with ca. 10 – 15 spinose cornuti in a tight linear cluster. Female genitalia: (Figure 22). Posterior apophysis approximately half length of anterior apophysis. Ductus bursae with anterior sclerite. Corpus bursae long and ovate, with highly sclerotized, corrugated posterior half. Signum inwardly directed, cup-like, and bearing numerous spinate projections. Larva: (Fig. 28) Head black with white suture separating frons and lobes; clypeus white. Body white medially, transitioning to yellow through thorax to A 1 and through A 6 - A 10. Body with broad dark gray addorsal, supraspiracular, subspiracular, and adventral stripes, each bordered by thin black pinstripes. Spiracular area white medially, with region around black spiracles heavily spotted, exhibiting patchwork of ill-defined black patches. The larva resembles A. bisbili (Fig. 27), although our specimen of the latter shows less pronounced black spotting in the spiracular area. Additional larvae from both species are needed to draw definitive diagnostic conclusions.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	materials_examined	Holotype. ♂, MEXICO: Chiapas, San Cristóbal de las Casas, Parque Montetik, (16.682 °, - 92.599 °), elev. 2400 m, 20 - 21 - VIII- 2022, coll. IJ Garzón, TA Matson, FR Joele, & JJ Dombroskie, Genitalia Slide: TAM- 2022 - 169, [CNIN]. Paratypes (3 ♂, 9 ♀). 3 ♂, 1 ♀, MEXICO: same collection data as holotype except: “ Genitalia Slide: TAM- 2022 - 170 [♀], [CNIN]. 2 ♀, EL SALVADOR: Cerro Miramundo, Metapán, 2300 m, 1 - 4 - III- 1972, coll. S. & L. Steinhauser, [USNM]. ♀, EL SALVADOR: Hac. Montecristo, Miramundo, 2300 m, 13 - XI- 1971, [USNM]. ♀, EL SALVADOR: Cerro Miramundo, 2300 m, 23 - I- 1971, [USNM]. ♀, MEXICO: Chiapas, El Colegio de la Frontera Sur (ECOSUR), (16.7063 °, - 92.6161 °), 2127 m, Larva: 29 - VIII- 2024, Lot: A # 1, Host: Buddleja cordata, Pupation: 19 - IX- 2024, Eclosion: 15 - X- 2024, Andrea Murillo-Vázquez, [ECOSUR]. ♀, MEXICO: Chiapas, El Colegio de la Frontera Sur (ECOSUR), (16.7063 °, - 92.6161 °), 2127 m, Larva: 07 - IX- 2024, Lot: A # 4, Host: Buddleja cordata, Pupation: 20 - IX- 2024, Eclosion: 19 - X- 2024, Andrea Murillo-Vázquez, [ECOSUR]. ♀, MEXICO: Chiapas, El Colegio de la Frontera Sur (ECOSUR), (16.7063 °, - 92.6161 °), 2127 m, Larva: 07 - IX- 2024, Lot: A # 5, Host: Buddleja cordata, Pupation: 20 - IX- 2024, Eclosion: 21 - X- 2024, Genitalia slide: TAM- 2024 - 507, Andrea Murillo-Vázquez, [ECOSUR]. ♀, MEXICO: Chiapas, El Colegio de la Frontera Sur (ECOSUR), (16.7063 °, - 92.6161 °), 2127 m, Larva: 13 - IX- 2024, Lot: A # 6, Host: Buddleja cordata, Pupation: 19 - IX- 2024, Eclosion: 15 - X- 2024, Andrea Murillo-Vázquez, [ECOSUR].	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	distribution	Distribution. (Fig. 36). Acronyctodes corrugata inhabits the Central American montane and pine-oak forests from southern Mexico (Chiapas) through El Salvador and Honduras, and likely into Nicaragua.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	biology_ecology	Biology. (Fig. 28) The immature stages and life history of A. corrugata were revealed by author AMV. Larvae were collected from Buddleja cordata near San Cristóbal de las Casas, Chiapas, Mexico. Four adults, now paratypes, were successfully reared from the caterpillars, and these individuals were subsequently identified as A. corrugata through external examination and genitalic dissection by TAM. The cocoon of A. corrugata is a well-organized white mesh, somewhat resembling the cocoon of A. mexicanaria.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	etymology	Etymology. The specific epithet corrugata recognizes the sclerotized, corrugated posterior corpus bursae in the female genitalia, distinguishing this species from visually similar known congeners.	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
03860122FF81FF804CB7FF377C421927.taxon	materials_examined	Molecular data. Six specimens of A. corrugata (BOLD BIN: BOLD: AAZ 5681) have been DNA barcoded, revealing a pairwise distance of approximately 1.9 % from nearest-neighbor, A. cautama (BOLD BIN: BOLD: ACT 3853).	en	Garzón-Orduña, Ivonne J., Matson, Tanner A., Vázquez, Andrea Murillo (2025): Four new species of Acronyctodes Edwards (Geometridae: Ennominae) from Mesoamerica. Zootaxa 5621 (3): 335-352, DOI: 10.11646/zootaxa.5621.3.3, URL: https://doi.org/10.11646/zootaxa.5621.3.3
