Cephalodella auriculata ( Mueller , 1773)

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 auriculata ( Mueller, 1773)

Material examined.

Pond in Incheon Metropolitan City, Republic of Korea (37°27.020'N, 126°39.345'E), 2 Dec. 2021, Hee-Min Yang leg. NIBRIV0000896986, 1 female, glycerol permanent slide .

Remarks.

The morphological characteristics of the Korean specimens generally corresponded to those reported in a previous study ( Nogrady and Pourriot 1995). The body was soft and stout, 110-130 μm in length (Fig. 5C ). The head was large and as wide as the body. Foot was short and wide. The toes were short, 23-28 μm in length. The two toes were equal in length and curved ventrally. One red cerebral eye was located at the posterior end of the saccate brain. The vitellarium had eight nuclei. Trophi was symmetrical and virgate type A, 30 μm in length (Fig. 6A ). The fulcrum was long and straight. The manubrium was thin and curved. The rami of Korean specimen had blunt teeth at the apical part, whereas the specimens of previous studies had no teeth at the apical part ( Koste and Shiel 1991; Nogrady and Pourriot 1995).

Molecular data.

Partial COI sequence was obtained from one Korean specimen (NIBR deposit number, NIBRGR0000649738; GenBank accession number, ON898533).

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.