Catenula confusa Nuttycombe, 1956

Jung, Jongwoo, 2016, The first record of Catenula confusa Nuttycombe, 1956 (Platyhelminthes: Catenulida: Catenulidae) from Korea, Journal of Species Research 5 (3), pp. 539-540 : 539-540

Catenula confusa Nuttycombe, 1956

IJứ납ṈḇNj (ṳAE) ( Fig. 1)

Catenula lemnae Marcus, 1945a: 11 ; Marcus, 1945b: 1; Luther, 1960: 23.

Catenula confusa Jones, 1959: 335 ; van der Land, 1965: 235.

Material examined. Twenty individuals: Korea, Jeollanam­do, Sinan­gun, Heuksan­myeon , Ye­ri , 36°68′97.52″ N, 125°45′45.31″E, 21 September 2015, collected by Hanna Kim.

Diagnosis. Single zooid, 0.25­0.45 mm in length; 0.015 ­ 0.050 mm in width. Body, thread­like when elongated; 1­5 zooids; not forming balustrade. Head, anterior end rounded; cephalic auricles at posterior end of cephalic region; length of cephalic region, about 1/3 of total length of zooid in single zooid specimen. Statocysts located dorsal to cephalic ganglion.

Habitats. Ponds and ditches rich in organic matter.

World distribution. Cosmopolitan.

Remarks. Although specimens in this study show some differences with those of the original description of C. confusa in length and width of zooid, they conform to the specific diagnosis of this species suggested by Nuttycombe (1956).