A new species of Galumna (Galumna ) (Acari, Oribatida, Galumnidae) from Vietnam

Oribatid mite species of the family Galumnidae, Galumna (Galumna ) parakazakhstani sp. nov. , is described from litter of pine plantation in Dong Nai Culture and Nature Reserve (southern Vietnam). The new species is most similar to G. (G. ) kazakhstani Krivolutskaya, 1952, however, it differs from the latter by the body size, morphology of bothridial setae and notogastral porose areas A1 , development of anterior notogastral margin, and location of medial pore.


Introduction
During our taxonomic studies of oribatid mites from Dong Nai Culture and Nature Reserve in southern Vietnam, we found a new species of the genus Galumna (Acari, Oribatida, Galumnidae). The main goal of our paper is to describe this species.
The genus Galumna was proposed by Heyden (1826) with Notaspis alatus Hermann, 1804 (Hermann 1804) as type species. It comprises more than 170 species having a cosmopolitan distribution (data summarized by Subías (2004Subías ( , updated 2014). The generic diagnosis and an identification key to known species of Galumna in Vietnam have been provided earlier by Ermilov et al. (2013) and Ermilov and Anichkin (2014), respectively.
Litter was collected by taking 16 samples using a stainless frame (50 × 50 cm) and passed through a sifter (mesh size 2 × 2 cm). The fine fraction was placed in a Winkler extractor with a collection bottle containing 100 ml 75% ethanol. The extractions were conducted at room temperature over 20 days.
Holotype and paratypes were mounted in lactic acid on temporary cavity slides for measurement and illustration. The body length was measured in lateral view, from the tip of the rostrum to the posterior edge

Research Article
of the ventral plate. The notogastral width refers to the maximum width in dorsal aspect (without pteromorphs). Lengths of body setae were measured in lateral aspect. All body measurements are presented in micrometers. Formula for leg setation is given in parentheses according to the sequence trochanter-femurgenu-tibia-tarsus (famulus included). Formula for leg solenidia is given in square brackets according to the sequence genu-tibia-tarsus. General terminology used in this paper follows that of Grandjean (summarized by Norton and Behan-Pelletier 2009 Integument. Body color brown. Body surface microfoveolate (visible under high magnification in dissected specimens, ×1000). Pteromorphs with weakly developed radiate wrinkles.
Type deposition. The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; three paratypes are deposited in the collection of the Siberian Zoological Museum, Novosibirsk, Russia; four paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.
Etymology. The prefix para is Latin meaning "near" and refers the similarity between the new species and the species Galumna (Galumna) kazakhstani Krivolutskaya, 1952.