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Issue: Vol. 5285 No. 2: 16 May 2023
Type: Article
Published: 2023-05-16
DOI: 10.11646/zootaxa.5285.2.5
Page range: 311-324
Abstract views: 299
PDF downloaded: 22

A revision of Delevea Reichardt, 1976: a Southern African endemic water beetle genus including the largest known extant myxophagans (Coleoptera: Myxophaga: Torridincolidae)

Marine Biology and Ecology Research Centre; School of Biological and Marine Sciences; University of Plymouth; Drake Circus; Plymouth PL4 8AA; UK
Department of Zoology; University of Johannesburg; PO Box 524; Auckland Park; Johannesburg 2006; South Africa; Department of Freshwater Invertebrates; Albany Museum – Affiliated Research Institute of Rhodes University; Grahamstown 6140; South Africa
Coleoptera Aquatic Coleoptera Torridincolidae madicolous habitats new species South Africa

Abstract

The Southern African endemic torridincolid water beetle genus Delevea Reichardt, 1976 is revised, based largely on recently collected material from the Republic of South Africa. Significant range extensions are provided for the two previously described species, Delevea bertrandi Reichardt, 1976 and D. namibiensis Endrödy-Younga, 1997, these taxa apparently being endemic to the Fynbos Biome in the Western Cape Province and semi-arid, summer rainfall, areas of the Great Escarpment in Namibia and South Africa, respectively. In addition, two new species, Delevea madiba sp. nov. and D. namaqua sp. nov. are described from winter rainfall areas of Namaqualand in the Northern Cape Province. Both species are currently only known from their type locality and, at up to 2.85 mm in adult body length, D. namaqua sp. nov. is the largest described extant species of the suborder Myxophaga.

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