Stenocyamops pseudoluteus, Grimaldi, 2009

Grimaldi, David A., 2009, The Asteioinea of Fiji (Insecta: Diptera: Periscelididae, Asteiidae, Xenasteiidae), American Museum Novitates 3671, pp. 1-60 : 29-30

Stenocyamops pseudoluteus , new species

Figure 19

DIAGNOSIS: Silvery microtomentum on cheeks very slight; scutum and most of notum yellowish ochre; abdominal tergites almost entirely black-brown. Male genitalia with pointed, sclerotized ventral lobes of cercus; surstylus scimitar shaped, with preapical setulae; hypandrium with pair of broad, flat phragmata having fringed posterior margin.

DESCRIPTION: ThL 5 0.66 mm. Coloration, setation, and detailed structure very similar to that of S. vittatus , except as following: silvery microtomentum of cheeks is slight, not extending to face (slightly better developed in female); eyes dark red; scutum entirely ochre, without dark brown central area; acrostichals in single row of 4–5 fine setulae; anepisternum with row of 3–4 fine setae on posterior margin; anepimeron only slightly infuscate. Abdominal tergites almost entirely dark black-brown. Male terminalia:

(A). C. S. robustus . D. Cyamops femobrunneus .

Paired structures and hypandrium symmetrical. Epandrium setose, deep, with very narrow dorsal bridge connecting lateral portions. Cercus with dorsal half membranous, ventral portion sclerotized, forming two pointed, pendulous lobes, lobes setulose, apices extend- ed to level of epandrium where mesal margins flare laterad. Surstylus scimitar shaped, with preapical setulae on mesal margin and minute apical tooth; basal half of surstylus setulose. Hypandrium reduced, separated into two lateral lobes, median portion narrow and with small gap; lateral lobes bearing broad, flat phragmata with fringed posterior margin. Aedeagus short, bulbous, finely spiculate, apically with sclerotized strip, as figured.

Figures

Fig. 19. Male terminalia of Stenocyamops pseudoluteus (spcm. 40). A. Epandrial complex with aedeagus, posterior view. B. Hypandrium, aedeagal apodeme, aedeagus, in anterior view. Origin/homology of the large, flat lamella is uncertain. To the same scale.