Scipopus (Scipopus) wokomung, Lindsay & Marshall, 2023

Lindsay, Kate & Marshall, Stephen A., 2023, A revision of Scipopus Enderlein including the subgenera Scipopus s. str., Phaeopterina Frey and Parascipopus subgen. nov. (Diptera, Micropezidae, Taeniapterinae), European Journal of Taxonomy 904, pp. 1-189 : 83-85

Scipopus (Scipopus) wokomung sp. nov.

urn:lsid:zoobank.org:act:6E220724-6E7C-4705-B44F-4D1E7BD31959

Fig. 34

Differential diagnosis

Scipopus (Scipopus) wokomung sp. nov. resembles Scipopus (S.) chalybeus in the absence of outer vertical seta, an at least partially white first fore tarsomere and a shiny epicephalon that is clearly delineated from the upper frontal vitta. It differs in having a wide blue median sheen on the scutum, a depressed Z-shaped pattern of pale microtrichia on the notopleuron and a bare median clypeus.

Etymology

The species name is a noun in apposition derived from the exact name of the type locality.

Type material examined

Holotype

GUYANA • 1 ♀; Potaro-Siparuni, Mount Wokomung ; 5°7′53″ N, 59°48′31″ W; 698 m a.s.l.; 26 Oct. 2004; B. Hubley leg.; forest, pitfall trap (human dung); ROM.

Paratypes

BRAZIL • 1 ♂; MA, Pedro da Água Branca , F. Sta Rosa; 05°07′07″ S, 48°15′19″ W; 6 Jul. 2001; J.A. Rafael, F.L. Oliveira and J. Vidal leg.; Malaise; INPA .

GUYANA • 1 ♂, 3 ♀♀; same collection data as for holotype; ROM (♂, ♀ dissected and photographed, Fig. 34A–F ) • 1 ♀; same collection data as for preceding; debu00379786/MYCRO565-19 sequenced for CO1–5′; ROM .

Description

LENGTH. 11–15 mm.

HEAD. Palpus light brown, pale brown microtrichose and setulose on entire surface, denser on ventral edge, narrow (length 5.5× height). Clypeus light brown or orange, width ~2.0× height, bare medially, white microtrichose in posterolateral corners. Frontal vitta dull, orange, microtrichose. Epicephalon orange, shiny, bare, wide (width ⅔ or more of frontal vitta width at inner verticals), clearly delineated from upper frontal vitta. Paracephalon orange, slightly convex on posterolateral portions. Outer vertical seta absent, all other head chaetotaxy well-developed.

THORAX. Scutum black-brown, dark brown microtrichose, with wide, median blue sheen. Female cervical sclerite slightly convex anteriorly. Postpronotal lobe black-brown setulose, especially on anterior outer margin. Notopleuron black-brown, white microtrichose above anterior notopleural seta and on posterior ventral margin; white microtrichosity forming depressed Z-shape ( Fig. 34G ). Pleuron black-brown with the following microtrichosity: white on proepisternum and proepimeron, white on anteroventral ¾ of anepisternum, white on entire katepisternum, denser posteriorly, forming transverse band extending onto katatergite (only seen at some angles). Legs black-brown with blue sheen; fore tarsomeres 1–2 white, hind tarsomere 1 almost entirely white dorsally. Wing uniformly black-brown infuscate.

ABDOMEN (J+ ♀). T1 with fine, long, white setae. Pleuron pale grey microtrichose, P1 dark brown, dorsal half of pleural sac in males dark brown, pleural pattern otherwise indistinct on available (dried) specimens.

FEMALE ABDOMEN. T1+2 ~1.8 × length of T3. Oviscape dark brown or black, white microtrichose on anterior ⅓, ~2.0–3.0× length of T6. Combined spermathecal ducts long and narrow; common duct ⅔ of entire duct length. Paired spermathecal duct narrow, slightly wider distally, short (~3.0× length of paired spermathecae), swollen apically. Paired spermathecal stems long and slender with prominent rounded tubercles. Paired spermathecae spherical (partially collapsed in Fig. 34C ). Single spermathecal duct arising from basal ¹/10 of paired duct, narrow, ½ diameter and ¾ length of paired duct, swollen apically, terminating in one or two elongate, teardrop-shaped “single” spermathecae with minute pointed tubercles.

MALE ABDOMEN. T1+2 ~2.2× length of T3. Genital fork ~2.5× as long as T6, arms converging and touching, inner basal process straight, ¼ length of arm. Epandrium elongate, length 2.0 × height, taller posteriorly, short setose on posteroventral margin. Basiphallus small, crescent-shaped. Basal distiphallus very short (<1.0× length of phallic bulb), broad, ending in phallic bulb. Phallic bulb short and small, length ≈ height, upper chamber with rounded posterior projection, lower chamber rounded. Distal distiphallus long and narrow, 1.5× length of epandrium. Phallapodeme apically expanded.

Remarks

Scipopus (Scipopus) wokomung sp. nov. and S. (S.) chalybeus (in part) are the only species of Scipopus s. str. that lack the outer vertical seta. They are resolved on separate branches on the maximum-likelihood barcode tree ( Fig. 1 ), suggesting that the loss of the outer vertical seta is a homoplastic character. There is sometimes more than one “single” spermatheca (up to two) in S. (S.) wokomung .

Distribution

Brazil, Guyana.

Figures

Fig. 34. Scipopus (Scipopus) wokomung sp. nov. (ROM). A. Male terminalia, lateral view, Guyana, paratype. B. Male genital fork, ventral view, Guyana, paratype. C. Female spermathecae and associated structures, Guyana, paratype.D. Head, ♀, anterior view, Guyana, paratype. E. Head and thorax, ♀, dorsal view, Guyana, paratype. F. Habitus, ♀, Guyana, paratype. G. Thorax, ♀, left lateral view, illustrating white microtrichosity. Abbreviations: b = basiphallus; bc = bursa copulatrix; bdp = basal distiphallus; cd = common duct; ddp = distal distiphallus; e = epandrium; ea = ejaculatory apodeme; h = hypandrium; p = phallapodeme; pb = phallic bulb; pd = paired spermathecal duct; ps = paired spermatheca; pss = paired spermathecal stems; ss = ‘single’ spermathecae (2 present); vr = ventral receptacle.

Fig. 1. Barcode tree (CO1–5’) for Scipopus Enderlein, 1922, and selected outgroups. Generated using one representative from each BIN and with over 500 base pairs from the DS-SCIPOPUS dataset on BOLD.