Thecomyia chrysacra Marinoni and Steyskal, new species
Creators: name: Marinoni, Luciane
name: Steyskal, George C.
name: Knutson, Lloyd
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sciomyzidae
Thecomyia
Thecomyia chrysacra

description: 7. Thecomyia chrysacra Marinoni and Steyskal, new species (Figs. 4, 5, 12, 24, 36, 41, 42)
Description. Adult. Upper orbital seta present. Fronto­orbital spot oblong, width approximately 1/3 frontal width. Rostrum 0.54­0.64 in males and 0.67­0.7 in females as high as eye. White microtomentose infra­ocular marking in lateral view not forming a triangle. Mid femur with short anteromedial seta. Mid and hind femora brownish apically. Mesonotum with complete, well defined medial yellow stripe (Fig. 4). Tergite 5 nearly wholly golden yellow. Ejaculatory apodeme very wide apically, posterior margin concave, anterior margin almost straight (Fig. 12). Phallapodeme almost straight and slightly concave at articulation with basiphallus, without subapical process. Anterior basiphallic process with apex folded. Epiphallus large, well developed, extending to base of distiphallus. Distiphallus with 3 long digitiform extentions, left extention in lateral view wider and s­shaped. Hypandrium in lateral view with dorsal margin almost straight, anteroventral margin narrow, rounded (Fig. 24). Anteroventral hypandrial plates in frontal view very broad. Membranous projections of margins of anteroventral hypandrial plates extending to lateral margins of hypandrium, covered with minute hairs (Fig. 24). Posterior and anterior surstyli distinct; posterior surstylus apically pointed, in posterior view clawlike (Fig. 12). Female sternites 6, 7 and 8 almost fused, suture between 6 and 7+8 visible, longer than wide; anterior margin of sternite 6 very slightly sinuate; mid longitudinal portion less sclerotized. Spermathecal duct with sclerotized region joining spermatheca short; apical, digitiform projection broad at base and short (Fig. 36).
Type specimens. HOLOTYPE MALE. 1. Small rectangular label: [GUATEMALA] "La Providencia Obispo Guat"; 2. Small rectangular label: "J. M. Aldrich Coll, IV 18­26 " (USNM). In excelent condition. PARATYPES. The same labels as holotype, 4 m. and 3 f. (USNM); 3 m. and 4 f. (DZUP).
Other specimens examined. NICARAGUA. Managua, 5­16 May 1943, F.M. Snyder col., 1 m. (USNM). COSTA RICA. Higuito, San Mateo, no date, no col., 1 m. (CNC); same locality, no date, Pablo Schild col., 1 m. (CNC); same locality, no date, same col., 1 f. (USNM). PANAMA. Gamboa, Pipeline Road, Jul 1967, W.W. Wirth col. (Malaise trap), 1 f. (USNM); Juan Mina, 28 Aug 1923, R.C. Shannon col., 3 m. (USNM); Alhajuela, 19 Apr 1911, August Busck col., 2 m. (CNC). VENEZUELA. CARABOBO, Yuma, 16 Sep 1976, J.M. Ayala col., 1 m. (USNM).
Etymology. The species epithet, chrysacra, which is derived from Latin, is a combination of chryso, meaning gold or golden, and acra, meaning top or dorsum, in reference to the nearly wholly golden yellow fifth tergite.
description: Published as part of Marinoni, Luciane, Steyskal, George C. & Knutson, Lloyd, 2003, Revision and cladistic analysis of the Neotropical Genus Thecomyia Perty (Diptera: Sciomyzidae), pp. 1-36 in Zootaxa 191 on page 23, DOI: 10.5281/zenodo.156857