Brachypogon (Brachypogon) ginue, Huerta, Herón & Spinelli, Gustavo R., 2016

Huerta, Herón & Spinelli, Gustavo R., 2016, A new species of the predaceous midge genus Brachypogon Kieffer from the Neotropical Region and first description of the female of Brachypogon (Isohelea) cuacuahuitlus Huerta & Borkent (Diptera: Ceratopogonidae), Zootaxa 4066 (4), pp. 477-484 : 479-480

Brachypogon (Brachypogon) ginue new species

( Figs 1–2 , 5 )

Diagnosis. Male: Only Neotropical species of Brachypogon (Brachypogon) with the paramere bearing three subapical, stout, sclerotized spines. Female unknown.

Description. Male. Head ( Fig. 1 A) dark brown. Eyes with numerous interfacetal spicules, broadly separated medially. Antennal flagellum with dense plume, brown; flagellomere 1 with three apical sensilla coeloconica; flagellomeres 2–11 indistinctly separated; flagellomeres 11–13 longer than preceeding flagellomeres; AR 0.75. Palpus ( Fig. 1 B) pale brown; third segment slender, shorter than 4+5, with broad, deep, subapical sensory pit; palpal ratio 2.70. Mouthparts small, clypeus with two subbasal, two apical setae.

Thorax. Uniformly dark brown. Scutum sparsely covered with minute setae. Scutellum with four setae, two mesal, two lateral; katepisternum with one slender seta. Legs entirely dark brown; hind tibial comb with 8 spines, two short spurs. Foreleg TR 1.75, midleg TR 1.96, hindleg TR 1.75; tarsomeres 4 subcylindrical; tarsal claws small, equal in all legs.

Wing ( Fig. 1 C) length 0.85 mm, width 0.34 mm, CR 0.47. Membrane hyaline, without marginal macrotrichia in r3, stigma and anterior veins pale brown; radial cells obsolete; costa with 2 basal setae and row of 12 marginal setae, radius with 1 seta immediately distal to basal arculus, and 1 at tip of stigma; r-m crossvein oblique; M2 absent; veins M1, CuA1, CuA2 obsolete at wing margin. Halter whitish.

Abdomen. Dark brown. Genitalia ( Fig. 2 ): Tergite 9 broad, tapering gradually, apex truncated, proctiger large, quadrate, weakly sclerotized, with anterior margin notched; sternite 9 narrow, rectangular, about 5 times as broad as long, posterior margin transverse. Gonocoxite moderately long, stout, 1.8X longer than width, narrowed at 3/4 of total length; gonostylus slender, 0.62 as long as gonocoxite, slightly curved, tip pointed. Paramere ( Figs 2 A–E) triangular, sclerotized, anterior margin broad, U-shaped, tapering, with three subapical, stout, sclerotized spines, apex pointed extending to level of posterior margin of segment 10. Aedeagus ( Fig. 2 A,B, F) hyaline, triangular, basal apodeme abruptly bent ventrally, lateral arms slightly curved, heavily sclerotized to the level of basal arch, basal arch nearly straight, extending to 0.4 of total length, distal portion stout, triangular, produced beyond the distal level of gonocoxites by a short distance, narrow apex folded.

Female. Unknown.

Taxonomic discussion. This new species belongs to the impar group, typically with unadorned wing and vein M2 absent. This new species keys out to couplet 24 in Spinelli & Grogan (1998), where B. insularis Spinelli & Grogan from Cuba and B. ecuadorensis Spinelli & Grogan from Belize to Ecuador and northern Brazil are recognized. However, in these two species the gonocoxite is not narrowed at ¾ of its total length, the aedeagus exhibits conspicuous longitudinal wrinkles and the paramere lack the subapical sclerotized spines.

Type material. Holotype male, MEXICO, Hidalgo, Tlanchinol, km 3.5 carretera Tlanchinol-Apantlazol, bosque mesofilo de montaña, 20°59´16´´ N, 98°´39´36´´W, Altura 1540 msnm, 3–6-July-1997, Malaise trap, Coll. Blackaller, J., Pérez, A., Sánchez, B., ( CAIM). Paratype, 1 male, same data of holotype.

Etymology. This name is derived from the Otomi language, from the State of Hidalgo. Ginue literally means “fly”.

Distribution. Mexico, known only from the type locality ( Fig. 5 ).

Figures

FIGURE 1. Male. Head. Brachypogon (Brachypogon) ginue n. sp. A. Head, eyes separation, frontal view. B. Palpus, lateral view. C. Wing. Scale bar: A = 0.05, B = 0.04 mm, C = 0.16 mm.

FIGURE 2. Male genitalia, Brachypogon (Brachypogon) ginue n. sp. A, B (ventral view); C (lateral view); D, E, paramere (ventral view), F, aedeagus (ventral view). Scale bar: A = 0.1 mm, B = 0.064 mm, C = 0.05 mm, D = 0.025 mm, E, F = 0.04 mm. Legends: apex of aedeagus (ap aed), basal apodeme (ba apo), gonostylus (gonost), paramere (pm), spines of paramere (sp pm), sternite 9 (st 9).

FIGURE 5. Distribution of Brachypogon (Brachypogon) ginue sp. nov. (black circle), Brachypogon (Isohelea) cuacuahuitlus Huerta & Borkent (black rectangle).