Saturday, March 18, 2023

[Entomology • 2023] Trichopsenius huaxiensis • Discovery of the Termitophilous Genus Trichopsenius Horn, 1877 (Coleoptera: Staphylinidae: Aleocharinae) from China with Description of A New Species

Trichopsenius huaxiensis 
Jiang, Huang & Chen, 2023

The termitophilous genus Trichopsenius Horn, 1877 is recorded from China for the first time. A new species, Trichopsenius huaxiensis sp. nov. is described; it was collected in a nest of the termite genus Reticulitermes Holmgren from a dead and flattened pine tree.

Keywords: Guizhou, rove beetles, termites, termitophily, Trichopseniini

Habitus of Trichopsenius huaxiensis sp. nov., male
A dorsal view B lateral view.
Scale bars: 0.5 mm (A, B).

Habitat of Trichopsenius huaxiensis sp. nov.
A, B adults with workers and larvae of Reticulitermes sp.
C environment where Trichopsenius huaxiensis sp. nov. was found.

 Trichopsenius huaxiensis Jiang, Huang & Chen, sp. nov.
Diagnosis: Body reddish brown with elytra and lateral lobe of tergite IX darker. Pronotum transverse with anterior margin M-shaped at middle. Surface of visible sternites and tergites finely covered with short setae and modified with a row of long setae at posterior margin. Median lobe of aedeagus with apical lobe knife shaped; left paramere with apical lobe thin and strongly sinuous; right paramere with apical lobe curved and weakly sinuous, with a thin seta at base.

Etymology: The species is named after its type locality, Huaxi District (Guiyang City, Guizhou, China).

Biological notes: All adults of the new species were collected in November 2022, they were found in a dead and flattened pine tree where host termites were living (Fig. 5). There were obvious communications between the new species and its host termites after laboratory observation, including antennal touch at least. No attack behavior from their host termites was observed.

 Ri-Xin Jiang, Xiu-Dong Huang and Xiang-Sheng Chen. 2023. Discovery of the Termitophilous Genus Trichopsenius Horn, 1877 (Coleoptera, Staphylinidae, Aleocharinae) from China with description of A New Species. ZooKeys. 1152: 35-43. DOI: 10.3897/zookeys.1152.99290