Subtribe Trimiina Bowman, 1934

Museums

Regional Maps

• Trimii Bowman, J.R. 1934. The Pselaphidae of North America. Pittsburgh : Privately published 149 pp. [8].

  Type genus:

   Trimium Aubé, 1833.

Introduction

Many members of this subtribe can be readily recognized due to the antennal form, with antennomeres nine and ten short and appressed to the large eleventh antennomeres, visually suggesting that the antennal clubs are formed only by the large eleventh antennomeres. All of these have the lateral mesosternal foveae straight, often broadly meeting medially, and the median mesosternal fovea is punctiform when present (Fig. 5). However, these features cannot be used together to form an exclusive definition for this group, without dealing with a number of exceptions, particularly in Australia, though for the many Holarctic genera included in this subtribe these features are quite consistent. The Australian genera placed in the Trimiina either have the tenth antennomeres quadrate and not appressed to the eleventh antennomeres (Gayundah and Limoniates), or have the lateral mesosternal foveae slightly angled and the median mesosternal fovea slightly elongate (Armidale) (Chandler 2001: 231).

Diagnosis

Pronotum with antebasal sulcus distinct; lateral mesosternal foveae straight, narrowly to broadly meeting medially, often forming continuous tube (Fig. 5); median mesosternal foveae punctiform when present. Antennomeres IX-X usually short and transverse, usually close or appressed to base of antennomeres XI, antennal clubs usually appearing to be essentially formed from large antennomeres XI. Male genitalia usually lacking basoventral stem.

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] [230]

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