Colobaea distincta (Meigen, 1830)

Bratt, Albertus D., Knutson, Lloyd V., Murphy, William L. & Daniels, Anthony A., 2020, Biology, immature stages, and systematics of snail-killing flies of the genus Colobaea (Diptera: Sciomyzidae), with overviews of aspects of the tribe Sciomyzini, Zootaxa 4840 (1), pp. 1-64 : 41-42

Colobaea distincta

We cite here an English translation (from the original German) of Rozkošný’s (1967) description of the puparium and third-instar cephalopharyngeal skeleton based in part on a puparium found in a shell of Anisus spirorbis collected 3 April 1965 in Vranovice , southern Czech Republic, from which a female emerged on 16 April :

“Puparium (length 3.6–4.2 mm, width 0.8–1.0 mm) red-brown, anterior end blackish. Surface smooth. Original segmentation especially dorsally very indistinct. Cuticular spinules on the ventral side very tiny, only indistinctly visible through strong magnifying glass. Posterior spiracles on narrow stigmatic tubes. Remains of anterior spiracles at the sides of bilobed anterior cornua. Number of the spiracular slits on the anterior spiracles 15–17. CP skeleton (length 0.39 mm) with relatively massive mouthhooks, ventral arch with 22–24 long teeth, pharyngeal sclerite with divergent cornua and large, longitudinal oval windows in each cornu.”

The descriptions and figures were reproduced in Rozkošný (2002) and the figures in Vala (1989).