Macrotrachela timida timida Milne, 1916

Song, Min Ok, 2014, Eight new records of monogonont and bdelloid rotifers from Korea, Journal of Species Research 3 (1), pp. 53-62 : 58-59

5. Macrotrachela timida timida Milne, 1916 ( Fig. 2 B-D)

Macrotrachela timida timida Milne, 1916, pp. 152-154 ,

Figs. 3-3a ; Donner, 1965, p. 155, figs. 114a-b.

Material examined. 2 specimens, Hong-do, Sinan-gun, Jeonranam-do (mosses and soil, Chang-Ho Lee), 2 July, 2013.

Description. Body with smooth surface. Rostral lamella wider than rostrum end and quadruple-lobed; lateral lobes bigger than median ones and like auricles. Corona wider than cingulum pad. Upper lip rimmed and as high as disc retractor; with somewhat concave sides and U-shaped median lobe. Disc retractor bilobed. Dental formula 2/2. Rump ‘crinoline-type’ and with two deep longitudinal folds in the middle dorsally; anal segment extended dorsally forming like a hexagonal flange. Foot with four segments and three toes. Spurs conical, divergent, and somewhat longer than spur segment width; outer margin slightly convex; inner margin swollen like a shoulder until 1/3 from base and then abruptly tapering to narrow end; interspace narrower than spur base width.

Body length (in creeping) 205 μm. Trunk width (in creeping) 30 μm. Corona width 39 μm. Cingulm pad width 30 μm. Spur length 10 μm.

Distribution. South Africa, Czech Republic and Korea.

Remarks. New to Asia. After Milne (1916) described this species from South Africa, it has been reported only from Czech Republic (SüdMähren, Pollauer Berge) by Donner (1954; 1965) until the present study.

Figures

Fig. 2. A. Adineta gracilis Janson, 1893, ventral view. Macrotrachela timida timida Milne, 1916. B. creeping, dorsal view. C. feeding, dorsal view. D. rump, foot and spurs, dorsal view (Scales: A=50μm; B-C=20 μm).

Fig. 3. Habrotrocha scabropyga Bartos ˇ, 1958. A. creeping, dorsal view. B. feeding, dorsal view. Macrotrachela timida inquies Milne, 1916. C. feeding, dorsal view. D. rump, foot and spurs, dorsolateral view. E. rostrum and neck, dorsal view(Scales: A-C=50μm; D=20 μm).