A new sawfly of Megalodontesidae (Insecta, Hymenoptera, Pamphilioidea) with pectinate antennae from the Early Cretaceous of China

By

Wang, Yimo
Wang, Mei
Shih, ChungKun
Rasnit︠s︡yn, A. P. (Aleksandr Pavlovich)
Yao, Jun
Ren, Dong, 1963-
Gao, Taiping

Type

Article

Date of Publication

2019

Original Publication

ZooKeys

Volume

893

Pages

115--123

Subjects

ramified antennae , Symphyta , taxonomy , Yixian Formation

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.893.38512

 

Abstract

A new sawfly of Megalodontesidae, Jibaissodes peichenaesp. nov., is described from the Lower Cretaceous Yixian Formation of Northeastern China. It is established mainly based on the pectinate antenna comprising 42 flagellomeres and the proximal 28 bearing apical rami, which gradually shorten in length toward the apex of the flagellum. The pterostigma of the forewing is infuscated apically and on the hind wing, vein 1-Rs is nearly equal to 1r-m and slightly shorter than 1-M. The first tergum is widely excised posteriorly and roundly protruding laterally alike in Megalodontes. This find supports that pectinate antennae in extant sawflies of Megalodontesidae originated at least during or before the Early Cretaceous.