Contributions to the knowledge of oribatid mites of Indonesia. 2. The genus Pergalumna (Galumnidae) with description of a new species and key to known species in the Oriental region (Acari, Oribatida)

Abstract

A new species of oribatid mite of the genus Pergalumna (Oribatida, Galumnidae) is described from litter and soil materials in Sumatra, Indonesia. Pergalumna paraindistincta sp. n. is morphologically most similar to Pergalumna indistincta Ermilov & Anichkin, 2011, Pergalumna pertrichosa Mahunka, 1995 and Pergalumna sura Balogh, 1997; however, the new species differs from Pergalumna indistincta by the smaller body size, presence of long adanal setae ad1, and large, single median pore in females and males; from Pergalumna pertrichosa by the smaller body size, presence of three pairs of notogastral porose areas, elongated A1 and minute anal setae; from Pergalumna sura by the presence of strong adanal setae ad1, large, single median pore in females and males, and shorter bothridial setae. Furthermore, Pergalumna hawaiiensis hawaiiensis (Jacot, 1934) and Pergalumna panayensis Ermilov & Corpuz-Raros, 2015 are recorded for the first time in the Indonesian fauna. An identification key to the known species of Pergalumna in the Oriental region is given.

SUPPLEMENTARY DESCRIPTION OF <i>PERGALUMNA HAWAIIENSIS HAWAIIENSIS</i> (JACOT, 1934) (ACARI, ORIBATIDA, GALUMNIDAE) WITH ADDENDUM TO THE CHECKLIST OF ORIBATID MITES OF VIETNAM

“…The oribatid mite Pergalumna hawaiiensis (Jacot, 1934) (Acari, Oribatida, Galumnidae) was described as Galumna hawaiiensis from Hawaii (see Jacot 1934a). At present, this species is recorded also in Tahiti (Sellnick 1959) and Sumatra (Ermilov et al 2015b). Jacot (1934b) described the subspecies, Pergalumna hawaiiensis marquesana (Jacot, 1934) (as representative of Galumna) from the Marquesas Islands.…”

Contributions to the knowledge of oribatid mites (Acari, Oribatida) of Indonesia. 3. The genus Galumna (Galumnidae) with description of a new subgenus and seven new species

“…This work is a part of a continuing study of the Indonesian fauna of oribatid mites (see Ermilov et al 2015c, d), and includes data on the genus Galumna Heyden, 1826 (Acari, Oribatida, Galumnidae). During taxonomic identification, ten species were found belonging to four subgenera: Galumna (Atypicogalumna) subgen.…”