Bryodemina enigmatica, Lamas & Yamaguchi & Evenhuis, 2024

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 : 308-313

Bryodemina enigmatica sp. nov.

( Figs 18–33 )

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Diagnosis. Bristles on face presenting sexual dimorphism, males with dark brown bristles and females with yellow bristles; wing hyaline, slightly darker yellowish orange areas near base and anterior margin; abdomen with dark brown bristles, tergite 4 with sparse yellow bristles on center, dense tufts of yellow bristles on lateral margin of tergites; spermathecal bulb pear-shaped.

Description. Male. Body length: 14.7–16.5 mm; Wing length: 16.1–18.4 mm; Head width: 3.2–3.5 mm. Head: frons dark brown, gray pollinose, with long, proclinate and thin dark brown bristles; face dark brown, gray pollinose, with long, thin dark brown bristles ( Fig. 22 ); antenna dark brown, gray pollinose; scape cylindrical, twice as wide and long as pedicel, with dense tufts of long, spatulate dark brown bristles and tufts of white spatulate bristles on ventral surface; pedicel with short, thin dark brown bristles; postpedicel five times longer than pedicel, with apical stylus, laterally compressed in dorsal view; labellum oval with short, delicate and sparse light brown bristles; palpus short, light brown on base and dark brown on apical 3/4, gray pollinose; occiput dark brown, gray pollinose, with short, thin dark brown bristles mainly restricted to hind indentation of compound eye; with short white bristles on margin; ocellar tubercle dark brown pollinose, with proclinate, long and thin light brown bristles on anterior half. Thorax: dorsal view ( Fig. 18 ): scutum velvety dark brown on center and reddish brown on lateral and posterior margins, with short, thin and sparse dark brown bristles on anterior third, dense, medium length and thin dark brown bristles laterally; notopleuron light brown with long, thin dark brown bristles; row of 3–4 long and very strong dark brown prealar bristles; postalar wall with medium, thin light brown bristles on anterior half, and medium, thin dark brown bristles laterally, and row of 4–5 very long, strong dark brown bristles; scutellum reddish, with thin, sparse dark brown bristles longer on margin; lateral view ( Fig. 19 ): postpronotal lobe light brown with medium, thin dark brown bristles; anepisternum light brown with long, dense dark brown bristles on upper half, and medium, thin light brown bristles on lower half; katepisternum light brown with short, thin light brown bristles except on lower and anterior halves; anepimeron shiny light brown with long, thin dark brown bristles on posterior 3/4; meron light brown, bare; mediotergite shiny light brown, with dense long, thin dark brown bristles; laterotergite light brown with long, thin dark brown bristles; metepisternum light brown with short, thin light brown bristles on upper third; metepimeron light brown with medium, thin dark bristles on posterior half; stalk of halter light brown; knob dark brown on dorsal surface and yellow on ventral surface. Legs: dark brown pollinose; trochanters golden pollinose, with short, thin dark brown bristles; tarsus with short, strong dark brown bristles; first tarsomere longer than others; pulvillus smaller than claws; fore leg: coxa with dense medium sized and strong dark brown bristles on anterodorsal surface; femur with short shiny brown scales, row of short, strong dark brown bristles on middle 1/3 of anterior surface, and medium, thin light brown bristles on posteroventral surface; tibia with short, strong dark brown bristles on anterodorsal, dorsal, ventral, posterior and posteroventral surfaces; mid leg: coxa with long, strong dark brown bristles; femur with short shiny brown scales, row of short, strong dark brown bristles on middle 1/3 of anterior surface, and medium, thin dark brown bristles on posterior surface; tibia with short and delicate shiny dark brown scales around, and row of short dark brown bristles on anterodorsal, anteroventral, posterior and dorsal surfaces; strong dark brown bristles around apex; hind leg: coxa with long, strong dark brown bristles; femur with short shiny brown scales, row of long, strong dark brown bristles on ventral surface, and long, thin light brown bristles on ventral surface; tibia with short and delicate shiny dark brown scales around, and row of short, strong dark brown bristles on anteroventral, anterodorsal, posteroventral and posterodorsal surfaces; strong dark brown bristles around apex. Wing: hyaline, except for yellowish orange areas at basal costal (bc) cell, costal (c), basal medial (bm) cell, basal ½ of basal radial (br) cell and yellowish brown alula; costal vein with dense dark brown bristles longer near base and diminutive at posterior margin; tegula dark brown with medium dark brown bristles; R 4 strongly sinuate; cells r 5 and cua narrowly open at wing margin; alula with medium and thin light brown bristles on margin; wing three times longer than wide ( Fig. 24 ). Abdomen: dark brown pollinose; tergites 1–3 and 5–7 with long, thin dark brown bristles, longer laterally; tergite 4 with long, thin yellow bristles, longer laterally, except for short, thin dark brown bristles on center; sternites with long, thin light brown bristles ( Fig. 18 ). Male terminalia: dorsal view ( Figs 25, 26 ): ejaculatory apodeme long, slightly surpassing gonocoxal apodeme limits; distiphallus short, not surpassing apex of posterior process of gonocoxa; gonostylus conspicuously developed, hook-shaped; ventral view ( Fig. 27 ): gonocoxites fused, with central ridge marking line of fusion evident along entire length of gonocoxa; lateral view ( Figs 28, 29 ): gonocoxa elongate; basiphallus wide and distiphallus thin with truncate apex; gonostylus slender, hook-shaped with pointed apex; epandrium cap visor-shaped with regular anterior margin, except for convex central area, and deep notch on posterior margin ( Figs 30, 31 ).

Female. Body length: 16.8–18.2 mm; Wing length: 14.9–18.2 mm; Head width: 3.6–4.4 mm. Similar to male, except for: Head: eyes dichoptic, separated by distance of 2.5 times ocellar tubercle width; frons with long, thin yellowish to orange bristles on upper half and spatulate yellowish bristles on lower half; face with spatulate yellowish bristles ( Figs 20, 21, 23 ); scape with dense tufts of long, spatulate yellowish bristles; pedicel with short, thin yellowish bristles; postpedicel six times longer than pedicel. Female terminalia: acanthophorite (tergite 9+10) short in length, with 1/4 width of tergite 8; acanthophorite spines very thin, 1.5 length of cerci ( Fig. 33 ). Spermathecae: spermathecal bulb pear-shaped, almost as long as wide, two times longer than sperm pump; basal spermathecal duct thinner than apical duct; sperm pump at middle 1/3 of spermathecal duct, with sclerotized collars, equally developed on apical and basal ends of sperm pump; furca U-shaped, with membranous base, dorsally projected; lateral bars divergent, with delicate median fold; bar apexes curved upwards ( Figs 32, 33 ).

Type material. HOLOTYPE ♂: Brazil: GOIÁS (-16.68 / -49.25), xii.1937 (old catalog number: 26652) (MZ001274) ( MZUSP) . PARATYPES: Brazil, GOIÁS (-16.68 / -49.25), xii.1937, (old catalog number: 26653) (MZ001275) (2 ♂, MZUSP; 1 ♀, USNM) ; Aragarças (-15.90 / -52.24), i.1955, F.M. Oliveira col. (1 ♀, MNRJ) ; SÃO PAULO, Tamoio [probably Tamoio Plant, near city of Araraquara] (-21.95 / -48.17), xii.1944, (old catalog numbers: 26654 and 26656) (MZ001276), M. Barreto col. (2 ♀, MZUSP) ; MINAS GERAIS, Pedra Azul (-15.99 / -41.27), xi.1972, Seabra and Oliveira col (1 ♀, MNRJ) .

Additional examined material. Without data label (old catalog numbers: 62669 and 62653) (MZ001277) (1 ♂, 1 ♀, MZUSP) .

Etymology. The specific name is a noun in apposition and refers to the enigmatic identification of the series deposited in MZUSP in the early stages of this study.

Geographical records. Brazil (Goiás and São Paulo).

Remarks. A single female specimen (62669) has cell r 5 closed at the wing margin.

Figures

FIGURES 18–24. Bryodemina enigmatica sp. nov. 18. Holotype male habitus, dorsal view (Scale bar, 2.0 mm); 19. Holotype male habitus, lateral view (Scale bar, 2.0 mm); 20. Paratype female habitus, dorsal view (Scale bar, 2.0 mm); 21. Paratype female habitus, lateral view (Scale bar, 2.0 mm); 22. Male head, frontal view (Scale bar, 1.0 mm); 23. Female head, frontal view (Scale bar, 1.0 mm); 24. Male right wing, dorsal view (Scale bar, 1.0 mm).

FIGURES 25–31. Bryodemina enigmatica sp. nov., paratype, male terminalia. 25. Dorsal view (epandrium removed), line drawing (Scale bar, 0.1 mm); 26. Dorsal view; 27. Ventral view; 28. Lateral view, line drawing (Scale bar, 0.1 mm); 29. Lateral view; 30. Epandrium, dorsal view, line drawing (Scale bar, 0.2 mm); 31. 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 32–33. Bryodeminaenigmatica sp. nov., paratype, female terminalia.32. Spermathecae andfurca, line drawing (Scale bar, 0.2 mm); 33. Spermathecae, furca, tergite 8 and acanthophorites (tergites 9+10). Abbreviations: spmth blb = spermathecal bulb; spmth dct = apical spermathecal ducts; sclet clr = sclerotized collar; spm pmp = sperm pump.