Carex pendula, Bunderbos: the huge lump of frass in the intestine is characteristic for many Cerodontha‘s
“head” and mandibles. The fleshy humps dorsally and ventrally (bifid!) on the mesothorax, and ventrally on the metathorax, are charactistic of the subgenera Butomyza (to which angulata belongs) and Dizygomyza (Nowakowski, 1973a).
front spiracula dorsally and laterally; these pectinate spiracula are very unusual among Agromyzidae: because they closely resemble the situation in many other fly families, they probably represent a primitive state
abdomen with the relatively small lateral warts and (lower, therefore unsharp) the rear spiracula; and the rear spiraculum in more detail, with the the transversely placed elongated papillae (the long pointed tip of the spiraculum, better visible on the picture below, is a fourth papilla)
rear spiraculum, lateral; and the “head” seen from above, to show the narrow frontal keel, bearing many fine spinules
The larva is described by de Meijere (1926a, as semiposticata), Nowakowski (1973a) and Dempewolf (2001a). The front spiracula are pectinate. Rear spiraculum with 4, large, claw-like papillae; at their base a small black wart.