Lecane opias ( Harring and Myers, 1926 )

Song, Min Ok & Lee, Chang-Ho, 2021, New records of three monogonont and seven bdelloid rotifers from Korea, Journal of Species Research 10 (4), pp. 392-404 : 393-394

1. Lecane opias ( Harring and Myers, 1926) ( Fig. 1 )

ḤȇḆHȐẆḦÊệ (ṵḋ)

Monostyla opias Harring and Myers, 1926, p. 411 , pl. 45, figs. 5, 6; Koste and Shiel, 1990, p. 9, fig. 4: 2.

Lecane (Monostyla) opias : Koste, 1978, pp. 257, 258, pl. 84, figs. 8a, b.

Lecane opias : Koste, 1962, p. 111, figs. 23a, b; Segers, 1995, p. 188, fig. 482.

Material examined. Two specimens found from mosses and leaf litter at Galcheon-ri, Seo-myeon, Yangyang-gun, Gangwon-do, 37°54′3.0″N, 128°30′6.4″E, 20 June 2020.

Diagnosis. Anterolateral corners slightly pointed. Dorsal plate much wider than ventral plate medially; much shorter than ventral plate. Ventral plate about twice as long as wide; with wavy lateral margins. Head aperture margins mostly coincident and slightly wavy. Foot pseudosegment not projecting. Toe single and without accessary claws; lateral margins rather parallel until distal third and abruptly tapering to spinous end; three times as long as wide.

Measurements. Dorsal plate width 42 μm. Dorsal plate length 57 μm. Ventral plate width 35 μm. Ventral plate length 62 μm. Toe length 19 μm.

Remarks. This species is presumably cosmopolitan ( Segers, 1995). In Asia, it has been reported from Iran ( Hakimzadeh Khoei et al., 2011) and Thailand ( Savatenalinton and Segers, 2005) before the present study.

The Korean specimens have rather small spines on anterolateral corners, which are similar to those in the original illustrations as well as in the German specimens reported by Koste (1962). The toes of the Korean specimens were rather thicker and shorter than those of most of the specimens previously reported, and most similar to those of the German specimens ( Koste, 1962) in the general morphology.

World distribution. Presumably cosmopolitan.

Deposition. Deposited in the collection of the Nakdonggang National Institute of Biological Resources, Sangju-si, Gyeongsangbuk-do, Korea (NNIBR2020525IV5980).

Figures

Fig. 1. Lecane opias (Harring and Myers, 1926).A, B. habitus in different focal planes(Scales:A, B=20 μm).