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Issue: Vol. 5 No. 5: September 2022
Type: Article
Published: 2022-09-22
DOI: 10.11646/palaeoentomology.5.5.8
Page range: 468–474
Abstract views: 407
PDF downloaded: 16

Palleptoceridae fam. nov., an extinct leptoceroid family in mid-Cretaceous Burmese amber (Insecta, Trichoptera)

Universität zu Köln, Institute of Biology and its Didactics, Herbert Lewinstraße 2, 50931 Cologne, Germany
Friedhofstraße 9, 66894 Käshofen, Germany
Insecta Trichoptera Leptoceroidea Sexual dimorphism West Burma Block Gondwana Laurasia paleobiota

Abstract

The family Palleptoceridae fam. nov. is proposed as a new extinct family of the superfamily Leptoceroidea. It is characterized by the absence of ocelli, the presence of five-segmented maxillary palps in both sexes, antennae longer than the forewings, and the tibial spur in the form of 2/4/4. The extinct Palleptoceridae is closely related to the leptoceroid family Leptoceridae, but the formula for the adult tibial spur is reduced from 2/4/4 to 2/2/4 (Morse, 1981). The Palleptocerus grimaldii sp. nov. from the mid-Cretaceous Burmese amber is furthermore characterized by the sexual dimorphic wing venation. In the forewings, the apical forks I and V are present in the male and forks I, III, and V in the female; in the hind wings of both sexes, exclusively the apical fork V is present. The Leptoceroidea originated and evolved in Gondwana. Palleptocerus grimaldii sp. nov. is interpreted as a relict species of the Gondwanan Leptoceroidea in Burmese amber.

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