Cheilosia rhodiolae Schmid, 2000

mine

One white, elliptic egg is deposited on the leaf, generally at the underside. The larva penetrates the leaf directly from the egg. The first mine is a narrow corridor running towards the leaf tip, that is widened to a blotch. Because the leaves of the host plant are rather small, the larva needs to mine a considerable number of leaves. These are entered by biting an entrance in the underside of the leaf base. Frass as black grains in the mine. Pupation external.

host plants

Crassulaceae, monophagous

Rhodiola rosea.

It was shown experimentally that Sedum telephium is not acceptable as a host plant.

phenology

Larvae are full fed in mid August; hibernation as puparium.

distribution within Europe

Austria (Fauna Europaea, 2010). Possibly also Norway, Bulgaria and Slovenia (reports of Ch. semifasciata on Rhodiola).

larva

Extensively described by Schmid (2000a). The main differences with Ch. semifasciata are: mandible with 7-8 teeth (C.s.: 6); abdomen smooth (C.s.: finely hairy) and the rear spiracula, that are fused to one spiracular tube, with 5+5 openings (C.s.: 3+3).

puparium

Light brown.

notes

Mountain species; all observations were made above 2000 m.

references

Schmid (2000a, 2007a), Speight (2017a) .

mod 17.vi.2019