A new genus from Madagascar with strongly enlarged labium (Ephemeroptera, Baetidae)

By

Kaltenbach, Thomas
Gattolliat, Jean-Luc

Type

Article

Date of Publication

2021-11-12

Original Publication

African invertebrates : a journal of biodiversity research

Volume

62

Series / Issue

Issue: 2

Pages

465--484

Subjects

Afrotropical , Mayflies , Morphology , Protopatellata , systematics

Contributed by

Pensoft Publishers

Language

English

Published by

Pietermaritzburg, South Africa Council of the Natal Museum 2001-

Identifiers

DOI: https://doi.org/10.3897/afrinvertebr.62.73911

 

Abstract

A new genus of Baetidae, Megalabiopsgen. nov., and a new species, M. madagasikarasp. nov., are described from Madagascar based on nymphs. The new genus is characterized by having a strongly enlarged mentum; pedicelli with many long, stout, pointed setae; a brush of dense, short setae between prostheca and mola of both mandibles; an apically pointed maxillary palp with a stout seta at the tip; and a labium with many long, simple setae ventrally on glossae. The patellotibial suture is absent on the fore tibia and present on middle and hind tibiae. The claw is strongly elongated with two rows of denticles. The imago remains unknown and the relationships with other African genera of Baetidae are tentative. Despite being easily identifiable, only two nymphs were found in two highly sampled localities in Madagascar.