The first hygropetric Platynectes and its larva from eastern China (Coleoptera: Dytiscidae)
Hájek Jiří, Alarie Yves, Šťastný Jaroslav, Vondráček Dominik
Acta Entomologica Musei Nationalis Pragae 59(1): 217-228, 2019
Published online: 20th June 2019
Published in print: 10th August 2019
Views: 1513
Abstract: Platynectes (Gueorguievtes) davidorum sp. nov. is described, including all
larval instars, from hygropetric habitats in Fujian and Zhejiang provinces,
eastern China. The new species can be easily distinguished from all other Asia
Platynectes Régimbart, 1879 with dorsally strongly convex habitus, distinctly
impressed double reticulation of elytra, short appendages and the shape of
median lobe of aedeagus. Collected larvae were successfully associated with
adults using a molecular approach and the barcode for the new species is
provided as well as the phylogenetic position based on the mitochondrial
cytochrome oxidase I gene; they are described and illustrated, with detailed
morphometric and chaetotaxic analyses of the cephalic capsule, head appendages,
legs, last abdominal segment, and urogomphi. The classification of the new
species within the subgenus Gueorguievtes Vazirani, 1976, and its adaptation to
hygropetric habitats are briefly discussed.
Key words: Coleoptera, Dytiscidae, Platynectes, taxonomy, phylogeny, cytochrome oxidase I, barcode, new species, larva, chaetotaxy, hygropetric habitat, China, Palaearctic Region
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