Craspedochaeta argoniae, Lonsdale & Marshall, 2006

Lonsdale, Owen & Marshall, Stephen A., 2006, Revision of the New World species of Craspedochaeta (Diptera: Clusiidae), Zootaxa 1291 (1), pp. 1-101 : 75-76

Craspedochaeta argoniae spec. nov.

( Figs. 9 , 110–112 , Map 14)

Description ( Fig. 9 )

Body length 3.9 mm. Bristles light brown. Anterior dorsocentral bristle 2/3 length of posterior dorsocentral. Acrostichal bristle present. Hind fronto­orbital bristle 2/3 length of remaining fronto­orbitals. Thorax dark brown with anteroventral margin of katepisternum yellow. Fore and hind coxae white; mid coxa entirely brown ( Ecuador) or white on ventral half ( Bolivia). Legs light yellow with tarsi white and hind tibia entirely ( Ecuador) or apically ( Bolivia) brown. Back of head, occiput, base of mentum and dorsolateral margin of clypeus dark brown; anterior margin of frons orange; antenna (excluding arista) white with dark spot surrounding base of arista ( Ecuador) or first flagellomere dark brown excluding base ( Bolivia); lower margin of gena with shiny yellow strip; remainder of head light yellow ( Ecuador) or white ( Bolivia). Abdomen brown with cerci and surstyli light yellow. Wing darkly clouded, more so towards costa.

Female

Unknown.

Male terminalia ( Figs. 110–112 )

Annulus well developed. Width and height of epandrium subequal and length approximately 0.6 times height. Cerci half height of epandrium, tapering apically and entirely separated. Surstylus broadly rounded, 0.6 times height of epandrium and twisted so that inner face visible posteriorly; inner face setose with pointed tubercles on distal half (short, stout and pointed). Pregonite large and quadrate distally with two short bristles on anterodistal margin and numerous setulae along distal and anterodistal margins. Basiphallus quadrate, approximately equal in size to distal segment of pregonite. Phallapodeme half length of hypandrium+pregonite. Distiphallus large and sac­like with basal and distal sclerotized sections.

Etymology: The specific name is a patronym honouring Naiomi Argo, co­author of the 1924 “Revision of the two­winged flies of the family Clusiidae ” ( Melander & Argo, 1924).

Distribution: Bolivia, Ecuador (Map 14).

Holotype: ECUADOR. Napo: 7km S Baeza , 2000m, 25.ii.1979, H.&A. Howden, carrion trap (1♂, DEBU).

Paratype: ECUADOR. Same collection as holotype (1♂, QCAZ). BOLIVIA. Depto La Paz , 8km S Chulumani, Apa Apa, ex. Malaise trap, 1950–2100m, 16°22’S, 67°30.4’W, 24.iii.2001, S.D. Gaimari (1♂, USNM) .

Figures

FIGURES 7–9: heads; outline drawing, left lateral (arista and bristles removed, excluding vibrissa and fronto­orbital bristles); 7: Craspedochaeta concinna (Williston, 1896) (C. concinna species group); 8: C. pleuralis (Williston, 1896) (C. transversa species group); 9: C. argoniae spec. nov. (C. biseta species group).

FIGURES 110–112: Craspedochaeta argoniae spec. nov.; 110: hypandrial complex, left lateral; 111: external male terminalia, left lateral; 112: external male terminalia, posterior.