Atrichopogon grogani, Huerta, Herón & Dzul, Felipe, 2012

Huerta, Herón & Dzul, Felipe, 2012, Two New Species of the Genus Atrichopogon Kieffer (Diptera: Ceratopogonidae) from Mexico, Zootaxa 3557, pp. 20-30 : 24-30

Atrichopogon grogani , new species

Figs. (4B–8)

DIAGNOSIS. Male: only Neotropical species of Atrichopogon with pilose lobe on sternite 9, aedeagal-parameral complex with basal arch poorly developed, with evident basal, sclerotized band; median portion with posterolateral margin wrinkled. Female, with the following combination of characters: large spermatheca; femora and tibiae with narrow basal and broad subapical pale rings; pharynx with spicules and scutum and subscutellum darker.

DESCRIPTION. Male adult. Head. Pale brown. Ommatidia without interfacet pubescence; broadly abutting medially for length of 5–6 ommatidia. Antenna ( Fig. 5 A), flagellomeres 10-13 brown; with plume setae welldeveloped; flagellomeres 2–9 partially fused; flagellomeres 9–10 with plume setae, 10 longer than 9, flagellomere 9/10 0.68–0.69 (0.68, n=2); flagellomeres 11–13 elongate; flagellomere 11 longer than other flagellomeres; flagellomere 13 with apical projection not basally constricted; AR 1.23–1.24 (1.23, n=2). Palpus ( Fig. 5 C) brown; third segment with subapical sensory pit opening on distal third; segments 4, 5 separate; PR 2.46–2.47 (2.46, n=2). Proboscis length 0.18–0.19 (0.18, n=2) mm; head width/proboscis length 2.7 (n=2). Thorax darker, scutum and subscutellum darker, scutellum brown; scutum with setae arising directly from surface, not in pits; with lateral suture. Paratergite with one seta. Anepisternum narrow, broadly bilobed posteriorly. Wing ( Fig. 6 A) plain, without pattern of pigmented membrane; without macrotrichiae; second radial cell 2.6 times longer than first; first radial open; wing length 1.51–1.52 (1.51, n=2) mm; breadth 0.43 (n=2) mm; CR 0.68 (n = 2). Halter pale.

Legs pale brown; femora and tibiae ( Figs. 7 A–C) with narrow basal and broad subapical pale rings; hindtibia slightly expanded at apex. Fore femur with subapical tuft of setae. Hindtibial spur thick, longer than width of hindtibia at midlength; hindtibial comb with 10 spines; prothoracic TR 2.9–2.10 (2.9, n=2), mesothoracic TR 2.6–2.7 (2.6, n=2), metathoracic TR 2.6–2.7 (2.6, n=2); claws curved; empodia present. Abdomen ( Fig. 8 D) brown. Genitalia ( Figs. 4 B, 8D–E) large (length 0.3 mm), tergite 9 extending to same level of apex of gonocoxite; swollen basally; posterior margin rounded; sternite 9 with prominent pilose mesal lobe. Gonocoxite without medial lobe, moderately stout, gonocoxite length/width 2.0 (n=2); gonostylus 0.75 as long as gonocoxite, swollen at base, tapering to apex, tip rounded with tiny apical cuticular projection spine. Aedeagal-parameral complex broad, rounded; lateral arms curved posteriorly; basal arch poorly developed, with evident basal, sclerotized band; median portion with posterolateral margin wrinkled; small, triangular posteroventral processes. Cercus lobe-like, not extending beyond margin of tergite.

Female adult. As for male, with following differences. Head: female have bare eyes and with broadly abutting ommatidia medially for a length of 8 ommatidia; pharynx with spicules. Antenna with flagellomeres 1–8 longer than breadth; flagellomeres 9–13 elongate, proportions as shown in Fig. 5 B, flagellomere 13 with apical projection; AR 2.0 (n = 2); palpus as Fig. 5 D; PR 2.4–2.6 (2.5, n=2); head width/proboscis length 3.2 (n=2). Mandible without teeth. Thorax: prothoracic TR 3.2–3.3 (3.2, n=2), mesothoracic TR 3.0–3.1 (3.0, n=2), metathoracic TR 2.3 (n= 2).

Legs pale brown, pattern as in Figs. 7 D–F. Wing ( Fig. 6 B) membrane infuscated without pattern of pigmented membrane; anterior veins brown; coarse macrotrichia numerous on distal third of wing; second radial cell nearly 3.3 times longer than fist; first radial cell open; wing length 1.67–1.71 (1.69, n=2) mm; breadth 0.69 (n=2) mm; CR 0.77 (n=2). Abdomen ( Figs. 8 A–B). Genitalia: Sternite 8 narrow, with pair of lateral lobes, anterior with long setae, posterior with tuft of short setae. Sternite 9 narrow. Spermatheca ( Fig. 8 C) long, with short neck, measuring 0.24–0.26 (0.25, n=2) mm by 0.12–0.14 (0.13, n=2) mm.

DISTRIBUTION. Mexico: Oaxaca.

TAXONOMIC DISCUSSION. Atrichopogon grogani is similar to A. mexicanus Huerta (2001) . Both are large, brown species, and the females have bare eyes and with broadly abutting ommatidia medially for a length of 8 ommatidia, pharynx with spicules, mandible unarmed, membrane of wing with dense macrotrichia, legs with basal and subapical pale bands, spermatheca long and sternite 8 with posterolateral setal tufts. Sternite 9 of the male of both species bear a prominent pilose lobe on mesal portion, tergite 9 is rounded and the gonostylus tapers apically, with a tiny projection on its tip. However, A. grogani is clearly distinguished from A. mexicanus by the small basal arch and with evident basal, sclerotized band of the aedeagal-parameral complex. The females are nearly identical, except by coloration of scutum and subscutellum darker in A. grogani , while A. mexicanus is brown.

TYPES: HOLOTYPE. Male adult on microscope slide in Euparal. “ MEXICO /Oaxaca/Municipio San Juan Guichicovi/Localidad El Zacatal/ 26–28/jul/2009 /Trampa Malaise/Col. Salceda Sánchez B., Rodríguez Atanacio J. & Ordoñez Álvarez J./ HOLOTYPE / Atrichopogon grogani Huerta & Dzul (CAIM)”. Paratypes. One male and two females, same data as holotype.

DERIVATION OF SPECIFIC EPHITHET: We are pleased to dedicate this species to our colleague, Dr. William Grogan Jr., in recognition of his friendship and for his valuable contributions to ceratopogonid systematics.

Figures

FIGURE 4. Male genitalia, ventral view: A. Atrichopogon pachito sp. nov; B. Atrichopogon grogani sp. nov. Scale bar: A: 0.04 mm; B: 0.16 mm. Legends: aedeagal-parameral complex (Ae-Pa); apical spine (A sp); apodeme of gonocoxite (Ap gx); apodeme of sternite 9 (Ap t 9); base of tergite 9 (ba tg 9); gonocoxite (gx); lobe lateral of sternite 9 (lo la st 9); medial lobe of sternite 9 (me lo st 9); seta 1 (s 1); seta 2 (s 2); seta 3 (s 3); seta 4 (s 4).

FIGURE 5. Atrichopogon grogani sp. nov. Male. A, C; female. B, D. A, flagellomeres X – XIII, lateral view; B, flagellum (flagellomeres I – X and XI – XIII), lateral view; C – D, palpus, lateral view. Scale bar: A – B: 0.064 mm, C – D: 0.04 mm. Legends: third segment (3 er); sensorial pit (Sp).

FIGURE 6. Wing of Atrichopogon grogani sp. nov. A. Male, B. Female.

FIGURE 7. Atrichopogon grogani sp. nov. Legs, lateral view. Male. A – C; female, D – F. A, D, fore leg; B, E, mid leg; C, F, hind leg.

FIGURE 8. Atrichopogon grogani sp. nov. Female. A – C; Male, D – E. A, B, D, Abdomen, ventral view; C, Spermatheca, lateral view; E, genitalia, ventral view.