Dissup clausus, Zhang, Kuiyan, Yang, Ding & Ren, Dong, 2014

Zhang, Kuiyan, Yang, Ding & Ren, Dong, 2014, New short-horned flies (Diptera: Eremochaetidae) from the Early Cretaceous of China, Zootaxa 3760 (3), pp. 479-486 : 481-483

Dissup clausus sp. nov.

FIGURES 1–2

Diagnosis. Cell m3 obviously shorter than apical petiole of cell m3; cell cup closed with a short petiole.

Description. Female, body length 9.3 mm; wing length about 4.8 mm, width 1.6 mm. Scutum obviously arched in lateral view and strongly sclerotized, scutellum strongly sclerotized. Fore and mid legs short and thin; femora and tibiae of hind legs obviously longer than others with apical part strongly swollen; lengths of five tarsi descending.

Wing relatively small, shortened; venation distinct. Vein C ending nearly at wing tip, vein Sc ending slightly beyond middle of wing. Vein R1 long, ending nearly at apical 1/10 of wing; vein R2+3 very short and sinuous, originating from middle of cell d, ending at apical part of vein R1; R4 present, short; vein R4+5 arising from cell d; vein R5 ending at apex of wing. Crossvein r-m absent. Vein M with 4 branches, vein M3 very short; vein M4, arising from cell bm, and vein M3 converged with a long petiole. Vein CuA, short and curved backward, and vein A1 converged with a very short petiole. Cell sc wide open; mouths of cells r5, m1, m2 nearly equal width; cell m3 closed and sub-rectangular, its length shorter than the apical petiole; cell br obviously longer and wider than cell bm; cell cup closed.

Abdomen with 9 visible segments. Segment I shortest, sternite I slender and obviously sclerotized; Ovipositor with cerci sclerotized; cercus elongate, somewhat bent upward.

Holotype. Body with a wing in lateral view, part and counterpart. No. CNU-DB-LB2011001 P/C, housed in Key Lab of Insect Evolution & Environmental Changes, Capital Normal University, Beijing, China. Locality and horizon. Collected from near Chaomidian Village, Beipiao City, Liaoning Province, China. Early Cretaceous Yixian Formation outcrop.

Etymology. The species name refers to the cell cup closed. Remarks. The new species can be easily separated from the type species by the closed cell cup and the shorter cell m3.

Figures

FIGURES 1. Dissup clausus sp. nov. Holotype, Body with a wing in lateral view. Photograph.

FIGURE 2. Dissup clausus sp. nov. Holotype, Body with a wing in lateral view. Camera lucida drawing.