Scipopus (Phaeopterina) lineatus, 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 : 133-135

Scipopus (Phaeopterina) lineatus sp. nov.

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Fig. 58

Differential diagnosis

Scipopus (Phaeopterina) lineatus sp. nov. resembles S. (Ph.) melaneuris in having a dull, orange, microtrichose epicephalon but can be easily distinguished by the almost entirely yellow femora.

Etymology

The species name, from the Latin word for ‘streak’ refers to the hyaline stripe on the wing.

Type material examined

Holotype

SAINT LUCIA • 1 ♂; Descartiers Trail ; 400 m a.s.l.; 25 Dec 2002; S.A. Marshall leg.; UGIC256-15/ MYCRO157-15 sequenced for CO1; DEBU (dissected and photographed, Fig. 58B, D ).

Paratype

SAINT LUCIA • 1 ♀; same collection data as for holotype; UGIC232-15/MYCRO133-15 unsuccessfully sequenced for CO1; DEBU (dissected and photographed, Fig. 58A, C, E–F ) .

Description

LENGTH. 10 mm.

HEAD. Palpus orange, pale microtrichose, setulose and narrow (length 4.2 × height). Clypeus light brown, width ~2.1 × height, silvery microtrichose on entire surface. Frontal vitta dull, orange, microtrichose. Epicephalon dull, orange, microtrichose, not clearly delineated from upper frontal vitta. One lower fronto-orbital seta absent; all other head chaetotaxy well developed.

THORAX. Scutum black-brown, brown microtrichose, with a wide, silvery blue median sheen. Female cervical sclerite relatively flat. Postpronotal lobe black-brown with silvery microtrichosity lining posterior margin, setulose on outer lateral margin. Notopleuron black-brown with silvery-blue spot surrounding anterior notopleural seta. Thorax black-brown with blue sheen, entirely silvery microtrichose, more sparsely ventrally and medially on anepisternum and katepisternum, appearing bare at some angles. Femora almost entirely yellow, apex black; first fore and hind tarsomere black with ventral golden fringe. Wing mostly hyaline, infuscate apically and discally, forming subapical hyaline stripe.

ABDOMEN (J+ ♀). T1 with fine, long, white setae.

FEMALE ABDOMEN. Pleuron pale grey, dark brown on dorsal half of P2–5. T1+2 ~2.0 × length of T3. Posterior margin of T2 ~1.8× as wide as that of T1. Oviscape black, microtrichosity not observed (not visible on dissection), ~3.5 × length of T6. Common duct rugose, clearly delineated from paired duct, long and narrow (~⅓ of entire duct length). Paired spermathecal duct short (2.0 × length of paired spermathecae, although spermathecae are large in this species), parallel-sided, swollen apically. Paired spermathecal stems very short. Paired spermathecae large, elongate, slightly expanded distally and conspicuously and densely tuberculate. Single spermathecal duct arising from base of paired duct, narrow, <½ diameter and length as paired duct, swollen distally. Single spermatheca similar in structure to paired spermathecae but much smaller and apically bifid.

MALE ABDOMEN. Pleuron of available male discoloured. T1+2 ~2.0× length of T3. Genital fork 1.5× as long as T6, with arms converging; inner basal process pointed inwards, very short. Epandrium elongate (length ~2.0× height). Basiphallus small, frame-like. Basal distiphallus long (≈ length of epandrium), broad. Phallic bulb small, short (length ≈ height), with poorly defined upper and lower chamber. Distal distiphallus long and whip-like, 1.5× epandrial length. Phallapodeme and anterior hypandrium slender, not expanded.

Distribution

Saint Lucia.

Figures

Fig. 58. Scipopus (Phaeopterina) lineatus sp. nov. (DEBU). A. Head, ♀, anterolateral view, Saint Lucia, paratype. B. Male genital fork, ventral view, Saint Lucia, holotype. C. Head and thorax, ♀, ventral view, Saint Lucia, paratype. D. Male terminalia, lateral view, Saint Lucia, holotype. E. Female spermathecae and associated structures, Saint Lucia, paratype. F. Pinned, freshly mounted, ♀, Saint Lucia, paratype. Abbreviations: b = basiphallus; bc = bursa copulatrix; bdp = basal distiphallus; ddp = distal distiphallus; e = epandrium; ea = ejaculatory apodeme; h = hypandrium; pb = phallic bulb; pd = paired spermathecal duct; ps = paired spermatheca; sd = single spermathecal duct; sp = sperm pump; ss = single spermatheca.