Profenusa pygmaea larva

Quercus palustris, Putten, Schovenhorst: larva dorsal …

Profenusa pygmaea larva

… and ventral

thorax dorsal …

… and ventral

head dorsal; the spot at left at the rear margin is connected with parasitation by Grypocentrus

the feet (p1, in this case) bear three short spines anteriorly on the coxa, and end in a short curved claw

prolegs are missing (character of Profenusa), but their position still is recognisable in the surface structure of the integument

Profenusa pygmaea: larva

Quercus petraea, Hungary, Mosonmagyaróvár, 24.v.2018 © László Érsek: larva, dorsal

Profenusa pygmaea: larva

head and thorax, dorsal

Profenusa pygmaea: larva

larva, ventral

Profenusa pygmaea: larva

head and thorax, ventral

Profenusa pygmaea: prepupa

prepupa, dorsal

Profenusa pygmaea: prepupa

prepupa, ventral

Profenusa pygmaea: larva, dorsal

Quercus cerris, Hungary, Budapest, Hűvösvölgy, 4.vii.2018 © László Érsek: larva

Profenusa pygmaea: larva, ventral

same lave, ventral. Note that the spot on the metasternum is missing

Profenusa pygmaea prepupa

Quercus robur, Belgium, Nismes: prepupa

parasitoids

Sawfly larvae are parisitised by Ichneumonidae of the genus Grypocentus. Th curved, cylindrical eggs are anchored to the head or thorax of the victim.

Grypocentrus spec, egg attached to Profenusa pygmaea

Profenusa pygmaea larva with Grypocentrus spec, egg

Grypocentrus spec, egg attached to Profenusa pygmaea

dorsal view

Profenusa pygmaea larvae with cordyceps-like fungus

Quercus robur, Duin en Kruidberg. This larva has fallen victim to an entomopathogenic fungus, perhaps related with Cordyceps; a sword-like fruiting of c. 5 mm penetrated the epidermis of the mine.

See Lorenz & Kraus (1957a) for a description of the larva.

mod 30.vi.2019