Calliceratomyia pantelhomyia, 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 : 435-438

Calliceratomyia pantelhomyia , sp. n.

( Figs. 3 , 6 , 8, 9 , 11 , 14 , 17, 19 )

Diagnosis. Flagellomeres 1–12 with a short ventral extension ( Fig. 3 ). Last flagellomere almost as long as penultimate; a single ventral longer seta on flagellomeres 1–4, flagellomere 14 without longer ventral seta ( Fig. 6 ). M forking just opposite to origin of R4 ( Fig. 11 ). Extension of male gonocoxites distal to syngonocoxite more or less cylindrical. Gonostyle slightly longer than width at apex. Two separate groups of spines apically on inner face of male gonostylus, the dorsal row with 3–4 spines ( Figs. 14 , 17, 19 ).

Type material. Holotype male, labeled: HOLOTYPE, Calliceratomyia pantelhomyia sp. n. México, Chiapas, Municipio Pantelho, 6 km al sur, rumbo al poblado de Pantelho, Trampa Malaise, 29–30-jul-2009. Cols. Salceda, S. B. & Rodríguez, A. J. GPS: -92° ’ 29 55’’N; 16° 59’47”W; elevation, 460 m. ( CAIM). Paratypes: 3 males, same data of holotype (1 in CAIM, 2 in MZUSP).

Description. Body length (including antenna), 6.0 mm. 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. Vertex slightly elevated, with setae; transverse suture incomplete; frons bare; face with 8–14 setae, length of lateral pair of setae as long as first palpomere. Clypeus more or less triangular. Mouthparts considerably reduced, labellum small; pre-mental apodeme Y-shaped. Maxillary palpus ( Figs. 8–9 ) longer than labellum, with three brown, clearly articulated palpomeres. First palpomere humpback, distinctively bulky distally, with 7–8 socketed setae, entirely covered by sensillae; second palpomere shorter than first, with sensilla on basal half, 5–6 minute apical spines, and 2–5 socketed setae; third palpomere more or less cylindrical, with some sensilla on basal third and 8 minute apical spines. Antenna ( Figs. 3 , 6 ) length, 2.4 mm, with 15 flagellomeres. Scape and pedicel cylindrical, approximately 1.2 times as long as wide. Flagelomeres 1–12 more or less laterally compressed, flagellomeres 14–15 cylindrical, last flagellomere about as long as flagellomere 14 ( Fig. 6 ); flagellomeres covered with sensilla and short fine setae, flagellomeres 1–13 with a dorsal longer seta, only flagellomere 1–4 with a ventral longer seta. Thorax. Scutum with a mesal darker stripe and a pair of additional lateral darker stripes on a lighter background, evenly setose, no transverse suture; notopleural, supra-alar area and postalar callus with long bristles; scutellum brown, with three subapical setae. Mediotergite high, bare, dark brown; remaining pleural sclerites brown, anepisternum, katepisternum, mesepimeron, and laterotergite bare. Postpronotum with a pair of long bristles, proepisternum with 2–3 bristles and 4–5 small setae. Haltere brown, slightly longer than first abdominal tergite, pedicel and capitulum covered with short setae. Legs. As in previous species. Wing. ( Fig. 11 ) Membrane infuscated brown. Length, 4.0– 4.3 mm; width, 1.7–1.8 mm (n=2). M1+2 basally fused to Rs, fork slightly basal to level of origin of R4. Otherwise, as in previous species. Abdomen. Dark brown, basal and distal margins of segments 2–6 lighter. Segments cylindrical, covered with dark fine setae, segments 1 to 6 sclerotized, sternite 7 entirely membranous; sternite 8 trapezoid, tergite 8 very short. Male terminalia ( Figs. 14 , 17, 19 ). Dark brown, bent downward. Gonocoxites elongate, more or less cylindrical, setose, fused basally to form a syngonocoxite ring around the aedeagus. Gonostylus robust, densely setose, slight shorter than gonocoxite, longer than width at apex, ornamented with two well separated apical rows of spines, ventral row with 16–18 blunt, strongly sclerotized spines, the dorsal row with 3–4 spines. Aedeagal complex consisting of a simple, straight process with a pair of short lateral branches on anterior end and an opening at apex, ventrally covered by the fused parameres. Tergite 9 short, with setation along posterior margin. Cerci lobate, entirely covered with setae.

Female. Unknown.

Bionomics. Four specimens were collected with Malaise trap in a rainforest in the mountainous area of Chiapas.

Distribution. Mexico (Chiapas).

Etymology. The specific epithet of this species refers to the name of the type-locality, Pantelho, and the Greek name myia, standing for fly.

Figures

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 8 – 9. Calliceratomyia pantelhomyia, sp. n., male holotype. 8. Frontolateral view of head. 9. Maxillary palpus. 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.