Revision of the Nearctic Haliplidae (Coleoptera)

Abstract

The Haliplidae of the Nearctic region are revised. The generic and subgeneric division as proposed by Vondel is accepted here. The subgenus Paraliaphlus Guignot, 1930 is redefined. One species is described as new: Peltodytes roughleyi sp. n. Haliplus ohioensis Wallis, 1933, H. ungularis Wallis, 1933 and H. canadensis Wallis, 1933 are established as junior synonyms of H. annulatus Roberts, 1913, H. cylindricus Roberts, 1913 and H. nitens LeConte, 1850, respectively. Peltodytes lengi Roberts, 1913 is established as junior synonym of P. duodecimpunctatus (Say, 1823). P. mexicanus (Wehncke, 1883) and P. dispersus Roberts, 1913 are both established as junior synonyms of P. simplex (LeConte, 1852). Lectotypes are designated for Haliplus blanchardi Roberts, 1913, H.  Roberts, 1913, H. cylindricus Roberts, 1913, H. fasciatus Aubé, 1838, H. gracilis Roberts, 1913, H. leopardus Roberts, 1913, H. pantherinus Aubé, 1838, Peltodytes dispersus Roberts, 1913, P. duodecimpunctatus (Say, 1823), P. festivus (Wehncke, 1876), P. oppositus Roberts, 1913, P. sexmaculatus Roberts, 1913, P. shermani Roberts, 1913 and P. tortulosus Roberts, 1913. All species are illustrated and (re)described. A key to the Nearctic species is provided, as well as distribution maps.

Revision of the Nearctic Haliplidae (Coleoptera). Corrections and additions I

“…The characters to distinguish H. variomaculatus and H. deceptus mentioned by Brigham & Sanderson (1973) and Vondel (2021) are treated here again. Elytral maculation.…”

“…published records: Bowles et al 2008: Missouri. Alarie 2020: Ontario.Comparison of Haliplus deceptus and H. variomaculatusAs suggested byVondel (2021) the type material of H. variomaculatus is now examined together with a number of specimens of H. deceptus.Material examined.…”

An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber

“…The adults have been described as poor swimmers, living in shallow waters in habitats occupied by plants (Matheson, 1912;Hickman, 1931;Matta, 1976;Ghosh, 2021). When they swim, they use their setose legs (Matheson, 1912;Hickman, 1931), mostly the last pair, in an alternating pattern (Vondel, 2021). When not swimming, the adults crawl over the ground or the vegetation (Hickman, 1931;Matta, 1976) and hide when they are disturbed (Hickman, 1931).…”