Cadlina sparsa ( Odhner, 1921 )

Cetra, Nicolás & Roche, Andrea, 2023, Nudibranchia (Mollusca: Gastropoda) from San Matías Gulf, Northern Argentine Patagonia, Zootaxa 5244 (5), pp. 455-473 : 462-463

Cadlina sparsa ( Odhner, 1921)

( Figures 4B , 5C, 5D )

Material examined. Argentina, Río Negro : Las Grutas, four specimens (MLP-Ma 14576); El Fuerte, four specimens, intertidal, 03/2012 (one specimen deposited, MLP-Ma 14657); La Salvadora, one specimen, 11 m, 19/04/2017; One specimen, Plataforma, at 4 m, 10/2017 ; Isla Mejillón , two specimens, intertidal, 11/11/2017 (one specimen deposited, MLP-Ma 14658) .

Description. Length up to 30 mm, body white, with a row of orange spots on the edge of the mantle. Dorsum covered with scattered tubers of different sizes. 10 to 16 unipinnate or bipinnate gill leaves that surround the anal papilla. Rhinophores lamellate with 10-15 lamellae ( Figure 4B ). Radular formula 64 x 0.30.1.30.0. (MLP-Ma 14658). Rachidian teeth in form of claws with four cusps. The first lateral teeth have some denticles and a large median cusp. The outermost lateral teeth become increasingly longer with numerous denticles ( Figure 5C, 5D ).

Geographic distribution and depth range. California, from San Diego ( Behrens 1991) to Marin County ( Jaeckle 1983), Chile, Juan Fernandez Islands ( Odhner 1921) and Coliumo Bay (36° 32´S 72° 57´W) ( Schrödl 1996), Argentina, Camarones Bay (44° 53´S 65° 39´´ W) ( Schrödl 1996). Found in hard intertidal bottoms under rocks up to 18 m depth.

Remarks. Cadlina laevigata ( Odhner 1926) cited for Puerto Madryn and Cadlina berghi ( Odhner 1926) for Delgado Cape, in northern Argentina, have been revised and considered as synonyms of C. sparsa (Schrödl 2000) .

Figures

FIGURE 4. (A) Trapania rocheae, (B) Cadlina sparsa, (C) Polycera marplatensis, (D) egg mass of Polycera marplatensis, (E) Spurilla braziliana, (F) egg mass of Spurilla braziliana, (G-F) Aeolidia cf. campbellii photo by Nicolás Battini.

FIGURE 5. Scanning electron micrographs. (A–B) Trapania rocheae (MLP-Ma 14834), (A) radular teeth, (B) jaw, detail of the masticatory border. (C-D) Cadlina sparsa (MLP-Ma 14658), (C) radular teeth, (D) detail of the lateral teeth. (E–F) Polycera marplatensis (MLP-Ma 14661), (E) radular teeth, (F) detail of the lateral teeth. (G) Aeolidia cf. campbellii (MLP-Ma 14575): radular teeth. (H) Spurilla braziliana (MLP-Ma 14659): radular teeth.