Mniobia montium Murray, 1911

Lee, Sue Yeon, Yoo, Jung Sun & Kim, Seung Tae, 2017, New records of 13 rotifers including Bryceella perpusilla Wilts et al., 2010 and Philodina lepta Wulfert, 1951 from Korea, Journal of Species Research 6, pp. 26-37 : 32-33

9. Mniobia montium Murray, 1911 ( Fig. 4)

Mniobia montium Murray, 1911b, pp. 291-292 , pl. 8, figs. 14a, b; Donner, 1965, pp. 246-247, fig. 181a-e.

Material examined. One specimen found in mosses and tree bark around Sangwonsa, Odaesan, Jinbu-myeon, Pyeongchang-gun, Gangwon-do, 37°47 ʹ 18.5 ʺ N 128°33 ʹ 50.6 ʺ E, 25 Sept. 2016.

Diagnosis. Corona as wide as cingulum pad, and slightly narrower than cingulum. Lateral margins of cingulum somewhat extended. Upper lip bell-shaped and with shallow median notch; much lower than trochal discs. Sulcus very narrow. Pedicel long. Spurs conical, tapering to blunt ends and with narrow interspace.

Measurements. Total body length in feeding 226 μm. Total body length in creeping 260 μm. Greatest trunk width in creeping 34 μm. Corona width 25 μm. Cingulum width 28 μm. Cingulum pad width 26 μm. Spur length 5 μm.

Remarks. The characteristics of the Korean specimen coincide well with those in the original description except that sulcus is much narrower than that of the type specimen.

The shape of median notch of upper lip is variable from simple slit to U-shaped depression. In the Korean specimen, the median notch was a shallow V-shaped depression.

This species is rare and has been reported from Austria, Germany and Iceland after its description from Canada. The present study is the first Asian record of this species. World distribution. Austria ( Donner, 1965), Canada ( Murray, 1911b), Germany ( Jersabek and Leitner, 2013), Iceland ( Lindegaard, 1979) and Korea.

Deposition. In a permanent slide, deposited in the collection of the National Institute of Biological Resources, Incheon, Korea ( ZIIYIV0000004849 ) .