Monographie du genre thremma Trichoptera, Thremmatidae

Abstract

In France, Thremma gallicum includes two morphologically different populations; one lives in the Massif Central, the other in the Pyrenees. The population from Massif Central represents a new sub-species: T. gallicum arvernense.The autor gives the first description of the larva of T. sardoum as well as notes on the imago. The morphology and ecology of the larvae of the three species of this genus are also studied. The geographical distribution of the species indicates that the genus Thremma is very ancient. © 1971 Masson.