Taxonomic contribution to knowledge of the oribatid mite genus Trichogalumna (Acari, Oribatida, Galumnidae)

G. Ermilov, Sergey

doi:10.22073/pja.v14i4.87545

Taxonomic contribution to knowledge of the oribatid mite genus Trichogalumna (Acari, Oribatida, Galumnidae)

Author

Sergey G. Ermilov

Tyumen State University, Tyumen, Russia

10.22073/pja.v14i4.87545

Abstract

Trichogalumna (Oribatida, Galumnidae) currently comprises two subgenera and 34 species, collectively distributed in the pantropical and subtropical areas. A new subgenus— Trichogalumna (Paratrichogalumna) subgen. nov., with T. punctata Engelbrecht, 1972 as type species—is proposed. It differs from the other subgenera of Trichogalumna by the location of the adanal lyrifissure (distinctly distanced from anal plate). One new species—T. (T.) giaensis sp. nov.—is described, based on adults collected from forest litter in central Vietnam. The new species is characterized mainly by small body size; sparsely striate pteromorphs; dense polygonate-foveolate ornamentation in dorsocentral region of the notogaster; dense polygonate-tuberculate sculpturing between genital and anal plates; long bothridial seta with lanceolate, barbed head, having distinct, acicular apex; and four pairs of small, circular porose areas. The following synonymy is suggested: Trichogalumna (Trichogalumna) trowella Nakamura, Nakamura & Fujikawa, 2013 (= Trichogalumna gotoensis Shirosaki, Nakamura & Fujikawa, 2017 syn. nov.). An identification key to the known species of Trichogalumna is provided.

Keywords

Galumnid mites

identification key

morphology

Oriental region

taxonomy