Lecane furcata (Murray, 1913)

Min, Hee-Min Yang and Gi-Sik, 2021, New records of three lecanid rotifers (Rotifera: Monogononta: Lecanidae) from Korea, Journal of Species Research 10 (3), pp. 262-266 : 264-265

2. Lecane furcata (Murray, 1913) ( Fig. 2A- C )

Monostyla furcata Murray, 1913b, p. 358 - 359; Koste &

Shiel, 1990, p. 8. Monostyla ovalis Jakubski, 1914, p. 34 . Monostyla tethis Harring & Myers, 1926, p. 405 . Monostyla elachis Harring & Myers, 1926, p. 406 . Monostyla mologensis Bogoslovsky, 1935, p. 110 . Lecane furcata : Edmondson, 1936, p. 215; Kutikova,

1970, p. 480; Koste & Voigt, 1978, p. 242; Segers,

1995, p. 157. Lecane vanoyei De Ridder, 1960, p. 173 .

Material examined. Reservoir in Yeongdeok-ri , Bukmyeon , Yeongwol-gun, Gangwon-do, Korea, 37°17 ʹ 05.6 ʺ N, 128°26 ʹ 09.9 ʺ E. Collected by Hee-Min Yang on 20 Jun 2019 (NNIBRIV50292) .

Description. Hard lorica. Anterior margin of lorica straight. Antero-lateral corner angulate. Dorsal plate narrower than ventral plate anteriorly, wider in middle. Length of dorsal and ventral plate similar. Lorica 62.5 - 65.0 μm in length. Width of dorsal lorica 57.5 - 60.0 μm, ventral lorica 50.0 - 52.5 μm. Prepedal folds long and narrow. Foot plate wide and foot pseudosegment squircle. Foot pseudosegment not protruded from foot plate. Toe single with terminal fissure. Toe length 20.0 μm ( Fig. 2A, B ). Trophi malleate. Upper part of manubria thick, tapering narrow toward the end. The end of manubria curved inwards. Fulcrum short and thin in ventral view ( Fig. 2C ).

Distribution. Cosmopolitan.

Remarks. Lecane furcata is a cosmopolitan species and the most common lecanid rotifer found in submerged vegetation ( Segers, 1995). External characteristics of the lorica of L. furcata are similar to those of the following lecanid rotifers: L. acanthinula (Hauer, 1938) ; L. braziliensis Segers, 1993 ; L. dumonti Segers, 1993 ; L. inconsipicua Segers & Dumont, 1993 ; L. inopinata Harring & Myers, 1926 ; L. rugosa ( Harring, 1914) ; and L. undulata Hauer, 1938 ( Segers, 1995). Lecane furcata can, however, be distinguished from these species in that it has completely fused toe with a terminal fissure, an absence of antero-lateral spines, and by the ratio of the lorica/toe length.

Figures

Fig. 2.A-C. Lecane furcata. A. Line drawing of preserved specimen. B. photograph of preserved specimen. C. trophi. D-F.Lecane nana. D. Line drawing of preserved specimen. E. photograph of preserved specimen. F. trophi. Scale bars:A, B, D, E=50μm, C, F=10μm.