Cephalodella ventripes ( Dixon-Nuttall, 1901 )

Song, Min Ok, 2018, Five new records of monogonont rotifers from Korea, Journal of Species Research 7 (4), pp. 333-339 : 334

1. Cephalodella ventripes ( Dixon-Nuttall, 1901) ( Fig. 1 )

복족거두윤충 (신칭)

Diaschiza ventripes Dixon­Nuttall, 1901, pp. 25­26 , pl. 2, figs. 1­3.

Cephalodella ventripes : Harring and Myers, 1924, p. 484, pl. 28, fig. 5; Nogrady and Pourriot, 1995, pp. 139­140, fig. 188.

Material examined. Three specimens found in Gyeongpo wetland area, Gangneung-si, Gangwon-do, 37°47 ʹ 19.9 ʺ N, 128°53 ʹ 49.8 ʺ E, 15 Oct. 2017.

Diagnosis. Body short, chunky, convex dorsally and oval in dorsal view. Plates and sulci of lorica distinct. End of dorsal lorica protruding beyond distal end of foot pseudosegment. Foot small and ventral. Toes short, about 1/5 of total body length and slightly curved forward. Trophi type A. Fulcrum spatulated distally. Double cervical eyes.

Measurements. Total body length 95.5­104 μm. Toe length 22-23 μm. Trophi length 27 μm.

Remarks. This species is usually found in the littoral periphyton of most standing fresh waters. It is occasion- ally found in athalassic saline and coastal brackish waters ( Jersabek and Leitner, 2013). The Korean specimens were found at Gyeongpo wetland area, which is brackish.

This species is cosmopolitan and has been reported in Asia from Cambodia ( Min et al., 2011), India ( Sharma and Sharma, 2005), Iran ( Kordbacheh and Rahimian, 2012), and Thailand ( Sanoamuang et al., 1995).

World distribution. Cosmopolitan.

Deposition. Deposited in the collection of the Nakdonggang National Institute of Biological Resources, Sangjusi, Gyeongsangbuk­do, Korea (NNIBR2018113IV954, NNIBR2018113IV955, NNIBR2018113IV957).

Figures

Fig. 1. Cephalodella ventripes (Dixon­Nuttall, 1901).A. dorsal view; B. ventral view; C. lateral view(Scales: A­C=25 μm).