Cephalodella tinca Wulfert, 1937

Yang, Hee-Min & Min, Gi-Sik, 2023, A new species of the genus Cephalodella (Rotifera, Monogononta) from Korea, with reports of four additional cephalodellid species, ZooKeys 1141, pp. 185-199 : 185

Cephalodella tinca Wulfert, 1937

Material examined.

Soil from Yeoju-si, Gyeonggi-do, Republic of Korea (37°18.483'N, 127°41.067'E), 26 Sep. 2019, Kyu-Seok Chae leg. NIBRIV0000895434, 1 female, glycerol permanent slide .

Remarks.

The body was 200-220 μm long, elongated, and laterally compressed (Fig. 5A ). The dorsal and ventral margins were slightly bulbous in the lateral view. The lorica was flexible and transparent. The head was large, approximately one-fourth of the total length, and clearly distinguished from the body by the neck fold. The tail was rounded and as long as the foot. The toes were equal in length, slightly curved dorsally, and approximately one-fourth of the total length. A pair of red eyes was located at the front of the head. The mastax was large and had a salivary gland. The gastric glands were round and contained several granules. The vitellarium was large and had eight nuclei. The trophi was virgate type D, and symmetrical (Fig. 6D ). The fulcrum was straight and slightly spatulated at the posterior end. The manubrium was thick and had basal lamellae. The tip of the manubrium expanded and curved inward. The uncus had one large tooth.

Morphological characteristics of Korean C. tinca specimens corresponded well to the original description except for the size of body length. The body length of the Korean specimen was 200-220 μm, which was slightly smaller than the original description (260-280 μm) ( Wulfert 1937).

Molecular data.

Partial COI sequence was obtained from one Korean specimen (NIBR deposit number, NIBRGR0000649740; GenBank accession number, ON898534).

Figures

Figure 5. Line drawing of cephalodellid rotifers A Cephalodella tinca Wulfert, 1937 B C. gracilis (Ehrenberg, 1830) C C. auriculata (Mueller, 1773) D C. catellina (Mueller, 1786). Scale bars: 50 μm.

Figure 6. SEM image of the trophi of cephalodellid rotifers A Cephalodella auriculata (Mueller, 1773) B C. gracilis (Ehrenberg, 1830) C C. catellina (Mueller, 1786) D C. tinca Wulfert, 1937. Scale bars: 10 μm.