New faunistic and taxonomic data on oribatid mites (Acari: Oribatida) of Thailand
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ORIGINAL ARTICLE
New faunistic and taxonomic data on oribatid mites (Acari: Oribatida) of Thailand Sergey G. Ermilov 1 & Alexander A. Khaustov 1 Received: 21 July 2019 / Accepted: 2 October 2019 # Institute of Zoology, Slovak Academy of Sciences 2019
Abstract The present study is based on oribatid mite material (Acari: Oribatida) collected from Thailand in 2007. A list of identified taxa, including 18 species from 13 genera and nine families, is presented; from these 14 species, seven genera and two families are registered in this country for the first time. One new species of the genus Pergalumna (Galumnidae) is described; Pergalumna thailandensis sp. n. differs from P. parapassimpunctata, P. paratsurusakii and P. storkani by the number of notogastral porose areas, length of interlamellar and adanal setae and morphology of rostrum. Keywords Mites . Fauna . Morphology . Systematics . Pergalumna . Oriental region
Introduction At present, the oribatid mite fauna (Acari: Oribatida) of Thailand is insufficiently studied (e.g., Aoki 1967; Mahunka 1994; Fuangarworn 2010; Fuangarworn and Norton 2013; Pfingstl et al. 2019). Our work is based on material collected in southern Thailand during the expedition in 2017. The primary goal of this paper is to present the list of identified species and to provide new faunistic findings for this country. The secondary goal of this paper is to describe and illustrate one new species belonging to the genus Pergalumna Grandjean, 1936 (nominative subgenus). Pergalumna was described by Grandjean (1936), with Oribata nervosa Berlese, 1914 as type species. The nominative subgenus comprises 164 species having a cosmopolitan distribution collectively except the Antarctic region (Subías 2019). The subgeneric diagnosis was presented by Ermilov and Klimov (2017). Identification keys to species of Pergalumna from different geographical regions are presented by Ermilov et al. (2014, 2015), Ermilov and Starý (2018), Ermilov and Friedrich (2019).
* Sergey G. Ermilov [email protected] Alexander A. Khaustov [email protected] 1
Tyumen State University, Semakova 6, 625003 Tyumen, Russia
At present, representatives of Galumnidae are poorly studied in Thailand, and only eight species have been recorded (Aoki 1965; Mahunka 1994, 1995, 2008a, b).
Material and methods Oribatid mite material was collected in one locality in Thailand in 2017. Litter (about one kg) was collected by using a manual method. Mites were extracted into 75% ethanol using Berlese’s funnels without electric lamps in laboratory conditions. All species (except holotype) are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia (in ethanol with a drop of glycerol). Specimens were mounted in lactic acid on temporary cavity slides for measurement and illustration. Body length was measured in lateral view, from the tip of the rostrum to the posterior edge of the notogaster. Notogastral width refers to the maximum width of the notogaster in dorsal view (behind pteromorphs). Lengths of body se
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