Adinopsis

Introduction

The genus Adinopsis is comprised of small (1.6-3.7 millimeters in length), teardrop-shaped species that are inhabitants of detritus and mud at the margins of ponds and streams (Klimaszewski 1979, Klimaszewski and Jansen 1994).

Characteristics

Adults of Adinopsis can be distinguished from other Deinopsini by the combination of: 2-2-2 tarsal segmentation; 2 large subapical teeth on mandible; 4-segmented maxillary palpi with segments I and III vestigial; antennae 11-segmented with the two basal segments enlarged and the apical segment with an apical papilla; tergum X narrowly elongate; and apical lobe of paramerite with 2 long and 2 short setae (from Klimaszewski and Jansen 1994). Uhlig and Klimaszewski (1995) provided a key for identification of the species from Africa, and Klimaszewski (1979, 1982) provided a key for identification of most Neotropical, Nearctic, Australian and Oriental species.

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Mouthparts of Adinopsis sp. from left to right, mandibles, maxilla, hypopharynx and labrum.

Mouthparts of Adinopsis sp. from left to right, details of mandible, epipharynx and labium.

Distribution

The genus Adinopsis is known from the following faunal regions: Afrotropical [A. hammondi Klimaszewski, A. ndumu Klimaszewski, A. mmabolela Klimaszewski and Jansen, A. flavicornis Klimaszewski, A. africana Cameron, A. schoutedeni (Bernhauer), A. devroyi (Bernhauer)], Oriental [A. rufobrunnea Cameron, A. cinnamomea (Kraatz), A. nepalensis Pace], Australian [A. australis (Fauvel)], Neotropical [A. myllaenoides (Kraatz), A. pubescens Klimaszewski, A. braziliensis Klimaszewski, A. ferruginea (Sharp), A. angusta (Sharp)] and Nearctic (A. myllaenoides (Kraatz), A. bicornis Klimaszewski, A. cuspidata Klimaszewski). Klimaszewski and Jansen (1994) provided a world checklist of species and species groups. Zerche (1999) described a fossil species from Baltic Amber.

Discussion of Phylogenetic Relationships

Nothing is known of the phylogenetic relationships of the species of Adinopsis. Klimaszewski and Jansen (1994) described a new subgenus Condylopennis to include the species A. bicornis and A. cuspidata based on supposed apomorphic characteristics uniquely shared by these two species.

References

Klimaszewski, J. 1979. A revision of the Gymnusini and Deinopsini of the World. Canada Agriculture monograph No. 25. 169 pp.

Klimaszewski, J. 1982. A revision of the Gymnusini and Deinopsini of the world (Coleoptera: Staphylinidae). Supplement 2. Canadian Entomologist 114: 317-335.

Klimaszewski, J. and R. Jansen. 1994. Description of a new Afrotropical species of Adinopsis Cameron 1919 with notes on some Neotropical and/or Nearctic species (Coleoptera Staphylinidae Aleocharinae). Tropical Zoology 7:325-332.

Uhlig, M and J. Klimaszewski. 1995. A review of the African Adinopsis species with description of two new species from Northern Namibia. Mitt. Zool. Mus. Berl. 71: 297-309.

Zerche, L. 1999. Eine neue Art der Gattung Adinopsis Cameron aus dem Baltischen Bernstein. Beitr. Ent. 49(1): 97-105.