Description of larvae of Neobidessus alvarengai Young, 1981 from Brazil and key to the Argentine genera of Bidessini (Coleoptera: Dytiscidae)

Authors

  • Mariano Cruz Michat Laboratorio de Entomología, FCEN-UBA
  • Cesar Benetti
  • Yves Alarie

Keywords:

Adephaga, Hydroporinae, diving beetles, immature, chaetotaxy

Abstract

Larval morphology of the new world bidessine genus Neobidessus Young, 1967 is unknown. To fill this gap, here we present descriptions of the second and third instar of Neobidessus alvarengai Young, 1981 based on specimens collected in Roraima state, northern Brazil. The genus is diagnosed based on current knowledge of Bidessini larval morphology. As remarkable features, Neobidessus larvae bear a ventroapical spinula on antennomere 3, a relatively elongated siphon, and relatively short urogomphi with or without secondary setae. The description of this genus brings to seven (of a total of nine) the number of known Argentine Bidessini genera. A key for the identification of the mature larvae to these genera is provided.

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References

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Published

2026-03-10

Issue

Vol. 27 No. 2 (2025)

Section

Artículos

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