New species of the genus Molanna Curtis, 1834 (Trichoptera, Molannidae) in China inferred from morphology and DNA barcodes

By

Ge, Xin-yu
Peng, Lang
Du, Jie
Changhai, Sun
Wang, Beixin

Type

Article

Date of Publication

2022

Original Publication

ZooKeys

Volume

1112

Pages

161--178

Subjects

Caddisflies , COI sequence , integrative taxonomy , Morphology , Oriental region , wing venation

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1112.84475

 

Abstract

The male adult of Molanna truncata Ge, Peng & Sun sp. nov. is described and illustrated based on material collected in Si-chuan, China. It could be diagnosed by the subtriangular superior appendages when viewed dorsally, and by the mesal appendages each having a slender thorn and inferior appendages with a tiny inner process. Based on morphology of genitalia, we provide a dichotomous key to adult males of Molanna from the Oriental region. The DNA barcodes (partial mtCOI sequences) of M. truncatasp. nov. are generated and compared with existing sequences of Molanna species from Oriental and Palearctic regions. The mean intraspecific divergence of Molanna was 1.58% with a maximum of 8.50% in M. moesta. The Automatic Barcode Gap Discovery (ABGD) analysis of Molanna inferred 9 OTUs and thresholds of interspecific divergence of 10%. Divergence of M. truncatasp. nov. haplotypes from all other Molanna haplotypes ranged from 10.1% to 18%. We discuss distribution and potential groups of species within the Oriental Molanna species based on morphology.