Lecane perpusilla ( Hauer, 1929 )

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 : 394-395

2. Lecane perpusilla ( Hauer, 1929) ( Fig. 2 )

꼬ŔHȐẆḦÊệ (ṵḋ)

Monostyla perpusilla Hauer, 1929 , pp. 156, 157, figs. 14a, b.

Monostyla subulata perpusilla : Jersabek, 1996, p. 123, fig. 34; Koste and Shiel, 1990, p. 13, fig. 6: 5.

Lecane (Monostyla) subulata f. perpusilla : Koste, 1978, p. 243, pl. 81, fig. 1b.

Lecane perpusilla : Segers, 1995, p. 152, fig. 385.

Material examined. Four specimens sorted out from leaf litter and mosses on rocks at Galcheon-ri, Seo-myeon, Yangyang-gun, Gangwon-do, 37°54′3.0″N, 128°30′6.4″E, 1 August 2020.

Diagnosis. Anterolateral corners obtusely angulated. Dorsal plate wider than ventral plate; slightly shorter than ventral plate; with smooth margins. Ventral plate longer than wide; with smooth margins. Head aperture margins mostly coincident and slightly convex. Sulci not deep. Foot pseudosegment short and not projecting. Toe single and without accessary claws; lateral margins rather parallel until proximal third and gradually tapering to pointed end; with long and incompletely separated claws.

Measurements. Dorsal plate width 70 μm. Dorsal plate length 77 μm. Ventral plate width 60 μm. Ventral plate length 80 μm. Toe length 31 μm.

Remarks. This species has been reported from Africa, Europe, North America and Southeast Asia before the present study and is presumably cosmopolitan ( Segers, 1995; 2007).

The general morphology of the Korean specimens agrees well with that of the previously reported specimens including the original description except the shape of the toe. The lateral margins of toe of the Korean specimens are rather gradually tapering to the end, while those of most of the other specimens are angulated on either side of the base of the claw. The Austrian specimen reported by Jersabek (1996) had the toe which was most similar to that of the Korean specimens.

World distribution. Presumably cosmopolitan.

Deposition. Deposited in the collection of the Nakdonggang National Institute of Biological Resources, Sangju-si, Gyeongsangbuk-do, Korea (NNIBR2020525IV5981).

Superorder Gnesiotrocha Kutikova, 1970 ṜḑAEĒḒậ Order Flosculariaceae Harring, 1913 ǐḅÊệậ Family Testudinellidae Harring, 1913 ģnjÊệ⁂ Genus Testudinella Bory de St. Vincent, 1826 ģnjÊệẃ

Figures

Fig. 2. Lecane perpusilla(Hauer, 1929).A-C. habitus in different focal planes(Scales:A-C=25 μm).