Cadlina undetermined

• Main Authors: Ekimova, Irina A., Grishina, Darya Yu., Nikitenko, Ekaterina D.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2024
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Nudibranchia; Cadlinidae; Cadlina; Cadlina undetermined; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.11093296; http://treatment.plazi.org/id/038587BFA61CDD39AAAAFA50E96D8912

Cadlina sp. (Figs 1A, B, F, G, K, N, O; 2B) Material studied: MIMB48044, 1 specimen, the Sea of Okhotsk, Aniva Bay, Anastasia Cape, 46°00.727’N, 142°10.671’E, 5–15 m in depth, 22.08.2023, coll. A. Plaksin, A. Semenov. MIMB48045, MIMB48046, 2 specimens, dissected, collection locality, date and collectors are same as MIMB48044. Diagnosis : Length 20–26 mm (preserved specimens). Notum semitransparent white, rounded in front and posteriorly, covered with numerous yellow rounded spots on dorsal side. Large yellow subepidermal glands on dorsolateral sides of notum. Well-defined yellow line around notal edge. Buccal bulb with labial cuticle, formed by bifid rodlets. Radular formula: 67 × 17–24.1.17–24. Rachidian tooth trapezoid, with 4–5 denticles, almost equal in size. Lateral teeth hook-shaped with up to 18 denticles. Reproductive system triaulic (Fig. 2B). Ampulla large, slightly convoluted. Penis armed with small, densely arranged hamate spines. Prostatic part of vas deferens long and winding, non-prostatic portion of vas deferens formed several dense loops near penial sheath. Receptaculum seminis small, oval; bursa copulatrix large, rounded, muscular, connecting to vagina by wide duct. Molecular data: On both Bayesian (BI) and Maximum likelihood (ML) phylogenetic trees (Fig. 3) Cadlina sp. from Aniva Bay was recovered as a derived monophyletic group (posterior probability from BI, PP = 1; bootstrap support from ML, BS = 100). This clade is sister to monophyletic group, uniting Atlantic species of the Cadlina laevis (Linnaeus, 1767) species complex (PP = 0.94; BS = 80). The C. laevis species complex includes С. kamchatica Korshunova et al. , 2015 from Kamchatka, C. laevis s.str. from NE Atlantic and Arctic, Cadlina sp. and C. paninae Korshunova et al. , 2020 from the Kurile Islands, Cadlina koreana Do et al. , 2020 from the Sea of Japan and Cadlina umiushi from the Sea of Japan and Aniva Bay (PP = 1; BS = 87). Distribution : This species is found only in the Sea of Okhotsk, Aniva Bay. Remarks: This species shows ...