Macrotrachela aculeata Milne, 1886

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 : 31

7. Macrotrachela aculeata Milne, 1886

Macrotrachela aculeata Milne, 1886, p. 138 , pl. 1, fig. 6; Donner, 1965, p. 111, figs. 83d-h; Koste et al., 1993, p. 142, Abb. 32.

Callidina aculeata : Murray, 1911a, pp. 10-11, pl. 1, figs. 4-6c; Murray, 1911c, pp. 7-8, pl. 1, fig. 4.

Material examined. Two specimens found in dry leaf litter from Juwangsan, Cheongsong-gun , Gyeongsangbuk-do, 36°23 ʹ 23.6 ʺ N 129°10 ʹ 00.1 ʺ E, 17 Aug. 2016 .

Diagnosis. Each trunk pseudosegments with transverse row of spines posterodorsally as well as posterolaterally; each spine short and at the end of longitudinal fold except those on the first and the last two trunk pseudosegments. First foot pseudosegment with a hump dorsally. Spurs narrow, tapering and with narrow interspace.

Measurements. Total body length in creeping 240 μm. Greatest trunk width in creeping 61 μm. Spur length 8 μm.

Remarks. This species is easily recognized by the transverse rows of short spines on each posterodorsal as well as posterolateral margins of trunk pseudosegments. It is presumably cosmopolitan because it has been recorded from many European countries, South and Central Africa, North America and the Arctic. Its first Asian record was from the eastern part of Turkey (Erzurum) by Kaya (2013).

World distribution. The Arctic ( Kaya et al., 2010), Czech Republic, England, Hungary, Ireland, North America, South and Central Africa, Spain, Turkey ( Donner, 1965), Jamaica ( Koste et al., 1993).

Deposition. Deposited in the collection of the National Institute of Biological Resources, Incheon, Korea (ZII YIV0000004840, ZIIYGR0000000007).