Phasmadigonis alba ( Butler, 1882 ) Ramos-González & Venegas-González & Zamora-Manzur & Parra, 2024

Ramos-González, Mario I., Venegas-González, María Francisca, Zamora-Manzur, Carlos & Parra, Luis E., 2024, Revision of the genus Digonis (Lepidoptera, Geometridae): new species and new genera, ZooKeys 1216, pp. 173-200 : 173-200

Phasmadigonis alba ( Butler, 1882) comb. nov.

Figs 2 P , 9

Digonis alba Butler, 1882: 361; Bartlett-Calvert 1886: 333; Angulo and Casanueva 1981: 12; Scoble 1999: 229; Pitkin 2002: 248.

Material examined.

Syntype. Chile • 1 female; pinned; Mountains of the hacienda of Cauquenes ; T. Edmonds leg.; “ Chili, 82-107 ” [labeled]; “ Type ” [labeled]; NHMUK .

Other material examined.

Chile — • 1 male; Chile; “ Museo 5022 ” [Museum ID]; MNNC . — Diguillín Prov. • 1 male; Ñuble, Las Trancas ; 18-III-2012; G. Moreno leg.; “ UCCC-MUZC-Lep 1173 ” [Museum ID]; “ MMA 1173 ” [genitalia slide]; MZUC-UCCC . — Araucanía Region • 1 male; Araucanía , II-1888, coll. n. n, “ Museo 5029 ” [Museum ID]; MNNC ; • 2 males; same data as for precedings but “ Museo 5027 ” [Museum ID] and “ Museo 5028 ” [Museum ID]; all MNNC . — Chiloé Prov. • 1 male; Mocopulli, Ruta 5 Sur km 1170 , - 42.368000, - 73.728833, 182 m; 3-II-2017, leg. M. Ramos-G, M. Ramos-SM & C. Rose .

Argentina — • 1 male; Río Negro Prov., Bariloche ; 29-I-1991; H. Ibarra-Vidal leg.; “ HIV- 0034 ” [Museum ID]; MHNC .

Additional records.

Chile. — Talca Prov. • Cipreses hydroelectric plant; - 35.7867249, - 70.8078157; 16 - XII- 2023; observed by César Picar and submitted to iNaturalist in: https://inaturalist.mma.gob.cl/observations/196336300. • Cipreses hydroelectric plant; - 35.7865833685, - 70.8078496903; 21 - I- 2024; observed by César Picar and submitted to iNaturalist in: https://inaturalist.mma.gob.cl/observations/197310545.

Diagnosis.

As for the genus.

Redescription.

Male (Fig. 2 P ). Head: antennae slightly serrated; short palpi, subequal to eye diameter, porrect; frons and vertex covered with juxtaposed brownish scales. Thorax: patagia covered with elongated scales of same color as background; tegulae covered with piliform scales of same color as background; tibial spur formula 0-2 - 4. Forewings: subtriangular with acute apex and outer margin excavated between apex and M 3, with a slight mucronated extension; fovea absent; ground color gray-lilac reticulated with white; bands absent, only observable on wing surface are blackish points in subterminal area at the level of veins R 2, R 3, R 4, M 1, M 2, M 3, CuA 1, CuA 2, and 1 A + 2 A, also visible on ventral side; discal spot visible, punctiform, and blackish. Hindwings: subrectangular with small mucronated apex at the level of M 3; ground color ash-white, termen grayish; bands absent, only observable on wing surface is a row of blackish dots in subterminal area at the level of veins Sc + R 1, Rs, M 1, M 3, CuA 1, CuA 2, and 1 A; discal spot visible. Male genitalia (Fig. 9 ). Uncus straight, apex rod-like; gnathos V-shaped; valvae suboval, valvula and cucullus slightly setose, costa sclerotized; transtilla spatulate with sharp, projected vertices; saccus obcordate; juxta shovel-shaped, dorsally flattened and extended, with finger-shaped furca curved to the left, short, not surpassing the height of the transtilla ,, densely spiny sagittally; anellus sclerite weakly defined. Aedeagus tubular, straight, apex digitiform; vesica armed with a large spine.

Female. Unknown.

Distribution.

This species is found between the provinces of Cachapoal and Chiloé ( Chile) and Río Negro ( Argentina). It is distributed in parts of the biogeographic provinces of Santiago, Central Chile subregion; Maule and Valdivian Forest, Subantarctic subregion, in the Andean region.

Flight period.

Specimens were captured in December, January, February, and March. There are no records for other months.

Figures

Figure 2. Habitus of Digonis adults A Digonis aspersa (male in dorsal view) B Digonis aspersa (male brown-morpho in dorsal view) C Digonis aspersa (male brown-morpho in ventral view) D Digonis aspersa (female in dorsal view) E Digonis cervinaria, stat. rev. (male olivaceous-morpho in dorsal view) F Digonis cervinaria, stat. rev. (male olivaceous-morpho in ventral view) G Digonis cervinaria, stat. rev. (male fuscous-morpho in dorsal view) H Digonis cervinaria, stat. rev. (female in dorsal view) I Digonis cervinaria, stat. rev. (female olivaceous-morpho in ventral view) J Digonis cervinaria, stat. rev. (female brown-morpho in ventral view) K Digonis punctifera (male in dorsal view; photo courtesy of A. Hausmann) L Digonis punctifera (female in dorsal view) M Digonis gungnir Ramos-González & Parra, sp. nov. (holotype in dorsal view) N Digonis apocrypha Ramos-González & Parra, sp. nov. (holotype in dorsal view) O Digonis apocrypha Ramos-González & Parra, sp. nov. (holotype in ventral view) P Phasmadigonis alba, comb. nov. (male in dorsal view) Q Gugnelve butleri Ramos-González & Parra, sp. nov. (holotype in dorsal view) R Gugnelve butleri Ramos-González & Parra, sp. nov. (allotype in dorsal view). Scale bar: 10 mm.

Figure 9. Genitalia of Phasmadigonis alba, comb. nov. A male genitalia in ventral view B aedeagus in lateral view. Scale bar: 1 mm.