Bryodemina fasciata (Williston), 1901

Lamas, Carlos J. E., Yamaguchi, Carolina & Evenhuis, Neal L., 2024, Revision of the genus Bryodemina Hull (Diptera, Bombyliidae, Lomatiinae) with descriptions of two new Neotropical species, Zootaxa 5496 (3), pp. 301-331 : 313-317

Bryodemina fasciata (Williston), 1901

( Figs 34–50 )

Anisotamia fasciata Williston, 1901: 284 . Type locality: Mexico (Jalisco).

Oncodocera fasciata (Williston) : Paramonov, 1930: 67 (417); Hull, 1973: 316.

Ogcodocera fasciata (Williston) : Painter & Painter, 1962: 62.

Diagnosis. Face of male and female with light yellow bristles on sides of compound eyes; wing hyaline, slightly brownish areas near base and anterior margin; abdominal segments with dark brown bristles on tergites 1–3, tergite 4 white on apical ½ and dark brown on basal ½, forming a white band; spermathecal bulb pear-shaped.

Redescription. Male. Body length: 18.5–19.0 mm; Wing length: 16.5–17.0 mm; Head width: 3.9–4.0 mm. Head: frons dark brown, gray pollinose, with long, thin dark brown bristles and dark brown scales; face glossy dark brown, gray pollinose, with spatulate white bristles; oral margin with white bristles ( Fig. 38 ); antenna dark brown gray pollinose, with base inserted in facial groove; scape cylindrical, twice as wide and long as pedicel with short, thin dark brown bristles and longer white bristles on ventral surface; pedicel with short, thin dark brown bristles; postpedicel (missing on Holotype) seven times longer than pedicel, laterally compressed in dorsal view, with central longitudinal pit on inner surface; labellum oval, with short, delicate and sparse dark brown bristles; palpus short, dark brown with gray pollinosity, with short, thin and sparse light brown bristles; occiput dark brown, gray pollinose, with sparse, short light brown bristles and whitish hyaline scales, dense short yellowish white bristles on occipital foramen margin; ocellar tubercle dark brown, gray pollinose, with proclinate long and thin dark brown bristles (missing on Holotype). Thorax: dorsal view ( Fig. 34 ): scutum velvety dark brown, with long, thin and sparse yellow bristles, white near anterior margin, on anterior third, sparse dark brown bristles on anterior and lateral margins, posterior margin of scutum with short, thin dark brown bristles; notopleuron gray pollinose with medium length, light yellow, spatulate bristles and dark brown bristles, row of 3 long and very strong dark brown prealar bristles and sparse strong dark brown bristles; postalar wall with medium, thin dark brown bristles on anterior half, medium length and thin light brown bristles laterally, row of 5–6 very long, strong dark brown bristles; scutellum dark brown, with short, thin dark brown bristles, longer and stronger at posterior margin; lateral view ( Fig. 35 ): postpronotal lobe gray pollinose, with dense long, thin yellowish white mixed with dark brown bristles; anepisternum light brown, gray pollinose, with long, thin yellow bristles mixed with dark brown ones at upper half, and long, thin dark brown bristles on lower half, denser at posterior margin; katepisternum light brown, gray pollinose with dense medium length and thin dark brown bristles; anepimeron light brown, gray pollinose with long, thin dark brown bristles on area posterior to anepimeral ridge; meron light brown, gray pollinose, bare; mediotergite light brown, gray pollinose with long, thin dark brown bristles; laterotergite light brown, gray pollinose, with long, thin dark brown bristles; metepisternum and metepimeron light brown, gray pollinose, with medium length and thin dark brown bristles; stalk of halter light brown; knob yellow. Legs: dark brown, gray pollinose; all coxae dark brown with gray pollinosity, with long, thin dark brown bristles; all trochanters with dark brown bristles; all femora with dark brown scales; fore and mid tibiae with longitudinal row of dark brown bristles on anterodorsal, anteroventral, posteroventral and posterodorsal surfaces; all tibiae with row of bristles around apex; tarsus with short, strong dark brown bristles, first tarsomere longer than others; pulvillus smaller than claws; fore leg: femur with row of short, strong dark brown bristles on anteroventral surface; mid leg: femur with row of strong dark brown bristles on anteroventral and 2–3 bristles on apical third of posteroventral surface; hind leg: femur with row of dark brown bristles on anteroventral, ventral and posteroventral surfaces; tibia with row of dark brown bristles on anteroventral, anterodorsal and posteroventral surfaces and spurs around apex. Wing: hyaline, except for light brown areas at basal costal cell (bc), costal (c), basal medial (bm) cell and alula; costal vein (C) with dense dark brown bristles, longer near base and diminutive at posterior margin; tegula dark brown with short, thin dark brown bristles; R 4 slightly sinuate; cell r 5 closed on wing margin; cell cua open; alula with medium length and thin light brown bristles on margin; wing three times longer than wide ( Fig. 40 ). Abdomen: glossy dark brown; lateral margin of tergites with dense tuft of long, thin dark brown bristles; abdominal tergites with medium length and thin dark brown bristles, tergites 4 and 8 with medium length and thin white bristles on apical half, forming band; sternites dark brown, with dense long and thin dark brown bristles ( Figs 34 , 86 ). Male terminalia: dorsal view ( Figs 42, 43 ): ejaculatory apodeme short not surpassing gonocoxal apodeme limits; distiphallus short, not surpassing apex of posterior process of gonocoxa; gonostylus conspicuously elongate, with pointed apex; ventral view ( Fig. 44 ): gonocoxites fused, with central ridge marking line of fusion on basal ¾ of gonocoxa; apical ¼ smoothly fused with only discrete line visible; lateral view ( Figs 45, 46 ): gonocoxa elongate; basiphallus wide and distiphallus thin with truncate apex; gonostylus slender and elongate, hook-shaped and pointed on apex, with serrations on medial surface; epandrium cap visor-shaped with regular anterior margin, without notch, and deep notch on posterior margin ( Figs 47, 48 ).

Female. Body length: 20.7–21.3 mm; Wing length: 17.9–18.5 mm; Head width: 3.9–4.1 mm. Similar to male, except for: Head: eyes dichoptic; eyes separated by distance of two times ocellar tubercle width; frons dark brown, gray pollinose, with long, thin dark brown bristles except for white bristles and scales along eye margin and lateral to antennae ( Fig. 39 ); oral margin with white bristles; scape with dorsal digitiform projection on apex; pedicel with short, thin yellowish white bristles on dorsal surface and dark brown bristles on ventral. Thorax: dorsal view ( Fig. 36 ): scutum velvety dark brown, with long, thin and sparse yellow bristles anteriorly; lateral view ( Fig. 37 ): katepisternum with dense medium length and thin yellow and dark brown bristles on upper third; anepimeron with long, thin dark brown bristles on area posterior to anepimeral ridge. Legs: mid leg: femur with 3–4 strong, dark brown bristles on apical third of posteroventral and on basal half of anteroventral surfaces. Female terminalia: acanthophorites (tergite 9+10) divided in two separate sclerites, with 1/3 of tergite 8 length; acanthophorite spines long, 1.5 length of cerci ( Fig. 50 ). Spermathecae: spermathecal bulb pear-shaped, ¼ longer than wide, two times longer than sperm pump; basal spermathecal duct slightly thinner than apical duct; sperm pump placed at ½ of spermathecal duct, with sclerotized collars, equally developed on apical and basal ends of sperm pump; furca Ushaped, with membranous base, ventrally projected; lateral bars without well-defined contours and tenue median fold; bar apexes divergent, flattened and laterally pointed ( Figs 49, 50 ).

Type material examined. HOLOTYPE. ♂: México: JALISCO (unknown locality) (BMNH).

Additional material examined. México: CHIAPAS, Arriaga (16.24 / -93.90), R.H. Painter & E.M. Painter, col. (1 ♂, USNM) ; COLIMA, Puebla Viejo (19.15 / -103.65), R. Dreisbach & K. Dreisbach, col. (1 ♀, USNM) . Costa Rica: GUANACASTE, Santa Rosa, Cerro El Hacha (10.58 / -85.27), 13.vii.–3.viii.1985, D. Janzen col. (10 ♀, AMNH) .

Geographical records. Mexico (Jalisco, Chiapas and Colima) and Costa Rica (Guanacaste) .

Figures

FIGURES 34–41. Bryodemina fasciata. 34. Male habitus, dorsal view (Scale bar, 2.0 mm); 35. Male habitus, lateral view (Scale bar, 2.0 mm); 36. Female habitus, dorsal view (Scale bar, 2.0 mm); 37. Female habitus, lateral view (Scale bar, 2.0 mm); 38. Female head, frontal view (Scale bar, 1.0 mm); 39. Male head, frontal view (Scale bar, 1.0 mm); 40. Male right wing, dorsal view (Scale bar, 1.0 mm); 41. Female right wing, dorsal view (Scale bar, 2.0 mm).

FIGURES 42–48. Bryodemina fasciata, male terminalia. 42. Dorsal view (epandrium removed), line drawing (Scale bar, 0.2 mm); 43. Dorsal view; 44. Ventral view; 45. Lateral view, line drawing (Scale bar, 0.1 mm); 46. Lateral view; 47. Epandrium, dorsal view, line drawing; 48. Epandrium, dorsal view. Abbreviations: ejac apod = ejaculatory apodeme; lat aed apod = lateral aedeagal apodeme; basip = basiphallus; distp = distiphallus; epand = epandrium; goncx = gonocoxa; gonst = gonostylus.

FIGURES 49–50. Bryodemina fasciata, female terminalia. 49. Spermathecae and furca, line drawing (Scale bar, 0.2 mm); 50. Spermathecae, furca, tergite 8 and acanthophorites (tergites 9+10).

FIGURES 83–89. Abdomen pattern of Bryodemina species, dorsal view. 83. Bry. ayalai sp. nov., male (Scale bar, 1.0 mm); 84. Bry. ayalai sp. nov., female (Scale bar, 0.5 mm); 85. Bry. enigmatica sp. nov., male (Scale bar, 1.0 mm); 86. Bry. fasciata, male (Scale bar, 1.0 mm); 87. Bry. valida, male (Scale bar, 1.0 mm); 88. Bry. valida, female (Scale bar, 1.0 mm); 89. Bry. hedickei, male (Scale bar, 1.0 mm).