Subtribe Rhexiina Park, 1951

Museums

Regional Maps

• Rhexiini Park, O. 1951. Cavernicolous pselaphid beetles of Alabama and Tennessee, with observations on the taxonomy of the family. Geological Survey of Alabama, Museum Paper 31: 1-107 [63].

  Type genus:

   Rhexius LeConte, 1849.

Introduction

The large Neotropical genus Rhexius and Austrorhexius from Australia are the sole members of the subtribe Rhexiina Park. The Rhexiina can only be separated from the Trogastrina by the presence of the distinct, narrow, apical lobe of the pronotum. Some members of the Trogastrina, such as the Neotropical Anarmodius Raffray, have the apical portion of the pronotum narrowed, and a slight indentation to each side that suggests the initial stages of development of the constriction found in members of the Rhexiina. A more extensive analysis of the poorly known Neotropical genera of Trogastrina may direct a merger of these two subtribes (Chandler 2001: 94).

Diagnosis

Head as wide or wider than pronotum; lacking vertexal foveae; antennomeres I as long as next four combined; genae broadly swollen. Pronotum with narrow apical lobe distinctly defined by basal constriction.

Diagnosis References

Chandler, D.S. 2001. Biology, morphology, and systematics of the ant-like litter beetle genera of Australia (Coleoptera: Staphylinidae: Pselaphinae). Gainesville, FL : Memoirs on Entomology, International Vol. 15 viii + 560 pp. [Date published 30 April 2001] [94]

Park, O. 1952. A revisional study of Neotropical pselaphid beetles. Part two. Tribe Euplectini sensu latiore. Chicago Academy of Sciences, Special Publication No. 9 (2). 53-150 pp. [54]

General References

Chandler, D.S. 2001. Biology, morphology, and systematics of the ant-like litter beetle genera of Australia (Coleoptera: Staphylinidae: Pselaphinae). Gainesville, FL : Memoirs on Entomology, International Vol. 15 viii + 560 pp. [Date published 30 April 2001]

History of changes