Goniaspis Duda, 1930

Mlynarek, Julia J. & Wheeler, Terry A., 2009, Revision of the Neotropical genus Goniaspis Duda (Diptera: Chloropidae), Zootaxa 2033, pp. 26-40 : 27

Goniaspis Duda, 1930

Goniaspis Duda, 1930: 59 . Type species: Cadrema rubra Becker, 1916 (subs. des. by Duda 1931: 165). Palaeoenderleiniella Duda, 1930: 57. Type species: Cadrema rubra Becker, 1916 (subs. des. by Sabrosky 1941b: 761) (synonymized by Sabrosky 1941b: 753).

Diagnosis: Chloropidae, Oscinellinae with a long, apicoventral, hind-tibial spur, trapezoidal scutellum and long slender arista.

Description: Chloropidae, Oscinellinae. Vertex of head rounded in lateral view ( Fig. 1 ); frontal triangle shining and bare ( Fig. 2 ); frons microtomentose; cephalic chaetotaxy: long peristomal bristles, cruciate postocellar bristles, cruciate, erect, short ocellar bristles, long outer vertical bristles, short, weak inner verticals, interfrontal bristles long, with single row on frontal triangle at, or just medial to, lateral margin, fronto-orbital bristles reclinate, of equal size; eye sparsely and microscopically pubescent; gena narrow, vibrissal angle rounded, indistinct; face flat, wide, carina absent; first flagellomere reniform, higher than wide, arista longer than width of frons, and slender; proboscis and palpus short.

Scutum square, as wide as long; thoracic chaetotaxy: 1 anterior, 1 posterior notopleurals, 1 postsutural supra-alar bristle, 1 dorsocentral bristle; scutellum flat dorsally, trapezoidal, usually wider than long; 1 pair apical scutellar bristles on distinct, short tubercles, 1 or 2 pairs of lateral scutellar bristles; thoracic pleurites bare except for a row of setulae on katepisternum. Wing ( Fig. 3 ) long, narrow, with no markings, second costal sector equal to or shorter than third costal sector, distance between crossvein r-m and dm-cu 2.4 times length of dm-cu, anal angle broad, alula small, much longer than wide; veins pale; halter white. Legs long and slender; male femoral organ present as two rows of 3–5 tubercles ( Fig. 4 ); small, apical ventral spur on mid tibia; hind tibial spur present, usually apical, length more than twice diameter of hind tibia ( Fig. 5 ); tibial organ oval, sometimes very narrow, 0.2 to 0.25 times length of hind tibia.

Abdominal tergites setulose laterally and with sparse setae posteriorly, mostly microtomentose; sternites slender, with sparse setae, abdominal membrane desclerotized; male spiracles 3–5 in membrane near lateral margin of tergite.

Male postabdomen: pregenital sclerites narrow; spiracles 6 and 7 in membrane ventral to lateral margin of dorsal sclerite; epandrium rounded, usually higher than long in lateral view and wider than high in posterior view; surstylus simple, clavate or quadrate; hypandrium closed posteriorly; pregonite fused with postgonite, weakly sclerotized; basiphallus elongate, weakly sclerotized; distiphallus short, membranous; phallapodeme simple; phallic guide sclerotized; cercus small, triangular, projecting dorsoventrally.

Female terminalia not modified, cerci separate, round, setulose.

Figures

FIGURES 1 – 5. Goniaspis rubra. 1. head, lateral. 2. head, dorsal. 3. wing. 4. male femoral organ. 5. hind leg.