Calliceratomyia papaveroi, Huerta, Heron & Amorim, Dalton De Souza, 2016

Huerta, Heron & Amorim, Dalton De Souza, 2016, Three new species of Calliceratomyia Lane (Diptera: Ditomyiidae) from Neotropical Mexico, Zootaxa 4072 (4), pp. 430-440 : 431-435

Calliceratomyia papaveroi , sp. n.

( Figs. 1 , 2 , 5 , 10 , 13 , 16 )

Diagnosis. Flagellomeres 2–8 with a short ventral extension ( Figs. 1–2 ). Penultimate flagellomere length about twice width, last flagellomere tiny; all flagellomeres with one ventral and one dorsal seta ( Figs. 2 , 5 ). M forking just before origin of R4 ( Fig. 10 ). Extension of male gonocoxites distal to syngonocoxite slightly enlarged midway to apex. Gonostylus at apex almost as wide as its length. Two separate groups of spines apically on inner face of male gonostylus ( Figs. 13 , 16 ).

Type-material. Holotype male, labeled: HOLOTYPE, Calliceratomyia papaveroi sp. n. México, Oaxaca, Municipio Santo Domingo Petapa, Localidad Río del Sol, Trampa Malaise, 29–30-jul-2009. Cols. Salceda, S. B., Rodríguez, A. J. & Ordoñez, A. GPS: - 95° 14’ 13”N; 16° 56’ 55’’W; elevation, 480 m (CAIM). Paratype: 1 male, same data as holotype, slide-mounted (MZUSP).

Description. Body length (including the antenna), 5.0 mm ( Fig. 1 ). Head. Head wider than long. Eyes dichoptic, all facets of similar width, length of interommatidial setae close to facet width. Three ocelli present, aligned, of similar size, distance between ocelli slightly smaller than ocellus diameter. Vertex slightly elevated, with setae, transverse suture present, frons bare, face with 8 setae, length of pair of lateral setae close to first palpomere length. Clypeus more or less triangular. Mouthparts considerably reduced, labellum small; premental apodeme Y-shaped. Maxillary palpus longer than labellum, three clearly articulated brown palpomeres. First palpomere humpback, distinctively bulky distally, with 7 socketed setae, entirely covered by sensillae; second palpomere shorter than first, with some sensilla on basal half, projected beyond base of third palpomere, apically with 3 diminute spines, and one socketed setae; third palpomere more or less cylindrical, with some sensilla on basal third, 5 minute apical spines. Antenna ( Figs. 1–2 , 5 ) with 15 flagellomeres, 1.87 mm long. Scape and pedicel cylindrical, about 1.2 times as long as wide. Flagellomere 1 more or less cylindrical, flagellomeres 2–8 strongly compressed laterally, with a short (but evident) ventral projection, flagellomeres 9–13 less modified, flagellomere 14 cylindrical, elongate, apical flagellomere small, cylindrical ( Fig. 5 ); flagellomeres covered with short fine sensilla-like trichia, with one dorsal and one ventral longer seta on each flagellomere. Thorax. Scutum uniformly brown, evenly setose, no transverse suture; notopleural, supra-alar areas and postalar callus with long bristles; scutellum brown, with a pair of subapical setae. Mediotergite high, bare, dark brown; pleural sclerites brown, anepisternum, katepisternum, mesepimeron, and laterotergite bare. Postpronotum with a pair of long bristles, proepisternum with 4–5 long bristles and three small setae. Haltere brown, slightly longer than first abdominal tergite, pedicel and capitulum covered with short setae. Legs. Uniformly brown, femora light brown, covered with fine trichia, tibial spurs 1:2:2, dark brown. Fore coxa setose on anterior face, mid coxa setose anteriorly at apical half, hind coxa with an irregular row of setae latero-posteriorly. Femora clothed with fine microtrichia and dense distal setation, forefemur slightly shorter. Foretibia length twice forefemur length. All tibiae densely covered with microtrichia and irregular rows of setae. Foretibia apical spur about 1.9 times length of tibial diameter at apex, mid and hind inner spur slightly shorter than outer spur, longer than foretibial spur. Apical comb of setae present at inner face of hind tibia. All legs with dense microtrichia and with an irregular ventral row of spines. Tarsal claws black, with basal inner teeth. Wing ( Fig. 10 ). Membrane infuscate brown. Length, 3.8 mm; width, 1.4 mm. Membrane covered with abundant microtrichia and macrotrichia. Medial veins less sclerotized than cubital veins, all veins except A1 reaching wing margin; all veins with macrotrichia. Costa long, reaching tip of wing, barely extending beyond tip of R5. Sc short, incomplete, ending free; R1 long, slightly curved at apex, extending about 3/4 of wing length. Base of Rs oblique, slightly sinuose, originated on basal fourth of wing, Rs running considerably far from R1. R4 length approximately a third of Rs length, oblique along most of its length. M1+2 basally fused to Rs, r-m entirely obliterated; medial fork basal to origin of R4. M4 reaching wing margin beyond medial fork. CuA reaching wing margin clearly basal to medial fork. A1 less sclerotized than other posterior veins, incomplete on distal fourth. Abdomen. Dark brown, segment 1 lighter. Segments cylindrical, covered with dark fine setae, tergites and sternites 1 to 6 normally sclerotized, sternite 7 entirely membranous; sternite 8 trapezoid, tergite 8 reduced to a stripe. Male terminalia ( Figs. 13 , 16 ). Dark brown, bent downwards. Gonocoxites robust, elongate, setose, fused basally to form a syngonocoxite ring around the aedeagus, anterior margin slightly concave; portion of gonocoxites distal to syngonocoxite slightly enlarged midway to apex. Gonocoxal apodemes forming a wide posterior wall connecting gonocoxites and enclosing aedeagus. Gonostylus robust, densely setose, slight shorter than gonocoxite, as long as width at apex, ornamented apically with two well separated rows of inner spines, ventral row with 14–15 blunt, strongly sclerotized spines, dorsal row with 3–4 spines. Aedeagal complex consisting of a simple, straight process with a pair of short lateral branches on anterior end, an opening at apex, ventrally covered by fused parameres. Tergite 9 short, with setation along posterior margin. Cercus lobate, entirely covered with setae.

Female. Unknown.

Bionomics. Both specimens of the type series were collected with a Malaise trap in a tropical rainforest in the Mixteca region of the state of Oaxaca.

Distribution. Mexico (Oaxaca).

Etymology. This species is named after the eminent dipterist Dr. Nelson Papavero for his long contribution to dipterology and to systematics in general and as well to the history of dipterology in Mexico.

Figures

FIGURE 1. Calliceratomyia papaveroi, sp. n., male paratype, habitus. Scale bar, 0.5 mm.

FIGURES 2 – 4. Antennae of Calliceratomyia. 2. C. papaveroi, sp. n., male holotype. 3. C. pantelhomyia sp. n., male holotype. 4. C. zayolli, sp. n., male holotype. Scale bar, 0.1 mm. Flag = flagellum; Ped = pedicel, Sc = scape.

FIGURES 5 – 7. Antennal flagellomeres 13 – 15 of Calliceratomyia. 5. C. papaveroi sp. n., male holotype. 6. C. pantelhomyia sp. n., male holotype. 7. C. zayolli sp. n., male holotype. Scale bar, 0.1 mm.

FIGURES 10 – 12. Wings of Calliceratomyia. 10. C. papaveroi sp. n., male holotype. 11. C. pantelhomyia sp. n., male holotype. 12. C. zayolli sp. n., male holotype. Scale bar, 0.5 mm.

FIGURES 13 – 15. Ventral view of male terminalia of Calliceratomyia. 13. C. papaveroi sp. n., holotype. 14. C. pantelhomyia sp. n., holotype. 15. C. zayolli sp. n., male holotype. Scale bar, 0.1 mm.

FIGURES 16 – 19. Ventral view of male terminalia of Calliceratomyia. 16. C. papaveroi sp. n., holotype. 17. C. pantelhomyia sp. n., holotype. 18. C. zayolli sp. n., male holotype. 19. C. pantelhomyia sp. n., holotype, inner view of distal end of gonostylus. Scale bar, 16 – 18: 0.064 mm.