Cellana radiata Born, 1778

Vakani, Bhavik, Nakano, Tomoyuki & Kundu, Rahul, 2020, Diversity and taxonomy of the intertidal patellogastropod limpets of the mainland Indian coastline, Zootaxa 4728 (2), pp. 211-226 : 215-216

Cellana radiata Born, 1778

( Fig. 3 , Fig. 9b )

Description. Shell up to 40 mm in length, ovate, and broader to anterior to narrow posterior and moderately elevated. Apex is straight, pointed and sub-central. Sculpture consisting of numerous, narrow, radial riblets around 62 to 72, in some large specimens, up to 100. Coloration varies from greyish to black, with 4 to 5 bifid white lighter radial stripes observed on brown background, inner surface of shell has pearl white coloration. Foot is creamy-white in colour. Coloration difference also observed in foot, which is creamy white to white in colour. Same coloration observed at tip of cephalic tentacles, which covers one third of their length. Cephalic tentacles with radial maculations, bifurcated towards the margin, some specimens have radial maculations that join up to form a few broad bands.

Radular morphology. ( Fig. 9b ). Radula Type: Docoglossan, Formula: 1 + D1 + 1 + D1 +1. The radular ribbon of C. radiata is similar to that of C. karachiensis . In every row, there is a spear-shaped very small rachidian or middle tooth and one bifurcated lateral tooth on each side. One dominant marginal tooth on each side that is also bifurcated.

Materials examined. Specimens were collected from Uttambar coast, Maharashtra (17°53’33.1”N 73°03’40.8”E) and Konkan coastline, Karnataka. Four specimens (length 14.2–30.3 ± 5.77 mm, width 12.1–25.8 ± 4.95 mm and Height 10.1–4 ± 2.46 were examined. One specimen is deposited in the Museum (ZMGDNC51.18, coll. Bhavik Vakani).

Remarks. Powell (1973) indicated that this species is common in the Indo-Pacific. In our study, this species was found from all over the west coast of India except of the Gujarat coastline.

Habitat. Puddles and crevices of middle to upper littoral area of the intertidal zone.

Distribution. Konkan to Malabar coastline of the west coast of mainland Indian coastline.

Figures

FIGURE 3. Cellana radiata. a (dorsal), b (ventral), c (ventral empty shell), d (lateral). a–d (ZMGDNC51.3a), e–j variants of Cellana radiata—e (ZMGDNC51.3e), f (ZMGDNC51.18), g (ZMGDNC41.3g), h (ZMGDNC41.3h), i (ZMGDNC34.3i), j (ZMGDNC34.3j).

FIGURE 9. Radular teeth of patellogastropods (x 50). a: Cellana karachiensis, b: Cellana radiata, c: Cellana rota, d: Cellana conciliata, e: Cellana cylindrica, f: Patelloida lentiginosa, g: Lottia sp. (0.5 mm).