7. Paranais litoralis (Müller, 1784) (Fig. 7)

ềödz님ȃmǵÑ (ṵAE)

Nais litoralis Müller, 1784: 120, pl. 80, figs. 2 - 6.

Material examined. Cheonan-si (36°45′18.01″N, 127° 17′59.03″E), Korea; collected by JH Lee on 1 December 2014.

Deposition. NIBRIV0000879695.

World distribution. Cosmopolitan.

Diagnosis. Body smooth without papillate. No eyes. Ventral chaetae of II, 5 - 7 per bundle, with upper tooth 1.5 times longer than lower one (Fig. 7A), teeth length becoming gradually equal. Hair chaetae absent. Dorsal chaetae beginning from V, with upper teeth longer than lower, slightly thinner than ventral chaetae (Fig. 7B). Coelomocytes present.

Remarks. Paranais litoralis has been first recorded from Japan by Kondo (1936) and Yamaguchi (1953). This species is common in brackish water, and freshwater courses receiving saline pollution (Van Haaren and Soors, 2012). The collected site is a spring water pool that is connected to the sea.