Cellana cylindrica Gmelin, 1791

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 : 218

Cellana cylindrica Gmelin, 1791

( Fig. 6 , Fig. 9e )

Description. Shell diameter usually 20 mm to 25 mm, less concave and ovate in shape. Shall apex is strongly concentric and blunt. Shell colour is dark brown with reddish shine. Shell surface is brushy due to the presence of around 70 to 75 very fine, densely spaced radial ribs. Like other species of Cellana , it has a banded radiating pattern on the shell surface. Uneven dark to reddish brown and whitish scattered dots with 11 very light bands observed on the background of the shell surface. Inner surface is semi-translucent with light shine. Foot colour purely creamy white. Tip area of cephalic tentacles has the same coloration. The units of mantle skirt arrange in series of two largest tentacles protected by one small tentacles.

Radular morphology ( Fig. 9e ). Radula type: docoglossan formula: 1 + D1 + 1 + D1 +1. The radular ribbon is thin. Radular pattern seems to be the same as in other Cellana species.

Materials Examined. Specimens were collected from Visakhapatnam coast, Andhra Pradesh, India (17°44’51.66”N, 83°21’1.08”E). Five specimens were examined (length 13–14.8 ± 0.57 mm, width 9.9–12.4 ± 0.92 mm and height 2.3–4.3 ± 0.66 mm). Two specimens having museum ID: ZMGDNC92.1, ZMGDNC100.2, coll. Bhavik Vakani were deposited in the museum.

Remarks. This species has been reported from the Philippines (Natural History Museum Rotterdam, specimen reference number NMR 45033). We observed this species from the Vishakhapatnam coast and southern Indian coastline.

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

Distribution. This species was observed from the rocky intertidal of the east coast of India. It is the first report of this species from mainland coastal India.

Figures

FIGURE 6. Cellana cylindrica. a (dorsal), b (ventral), c (ventral empty shell), d (lateral). a–d (ZMGDNC92.1), e–g variants of Cellana cylindrica—e (ZMGDNC100.2), f (ZMGDNC100.6f), g (ZMGDNC100.6g).

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).