Planaxis sulcatus ( Born, 1780 )

Zvonareva, Sofya & Kantor, Yuri, 2016, Cheсklist of gastropod molluscs in mangroves of Khanh Hoa province, Vietnam, Zootaxa 4162 (3), pp. 401-437 : 412

Planaxis sulcatus ( Born, 1780)

Figs 4 Q–R

Buccinum sulcatum Born, 1780 : pl. 10, figs 3, 6.

Planaxis sulcatus: Houbrick 1985: 5 –10, figs 1–4 (full synonymy); Okutani 2000: 129 –130, pl. 65, fig. 1; Thach 2005: 47, pl. 10 fig. 26; Poppe 2008a: 298 –299, pl. 94 fig. 11; Zvonareva et al. 2015: 8.

Material examined. Dam Bay, natural and planted mangroves, about 20 specimens.

Abundance. Common.

Measurements. Up to 25 mm ( Okutani 2000).

Ecological notes. Reproduction with indirect lecithotrophic type of development, including partial brooding followed by a planktonic phase ( Houbrick 1987).

Lives in intertidal rocky environment. Groups of snails cluster together on large rocks. It grazes on microalgae covering rocky substrates in moderate to low energy habitats ( Houbrick 1987).

In studied sites clusters of this species were found on rocks under trees on seaward edges of mangroves.

Relation to mangroves. Eurybiotic.

Distribution in Vietnam. From northern-east coast to southern delta ( Thach 2005).

General distribution. Throughout Indo-Pacific ( Houbrick 1985).

Figures

FIGURE 4. A – B. Clypeomorus batillariaeformis (19 mm). C – D. Clypeomorus bifasciata (12 mm). E – F. Clypeomorus pellucida (22 mm). G – H. Cerithium coralium (25 mm). I – J. Cerithium traillii (40 mm). K – L. Rhinoclavis vertagus (53 mm). M – N. Batillaria sp. (27 mm). O. Batillaria sp. (30 mm). P. Batillaria sp. (29 mm). Q – R. Planaxis sulcatus (22 mm).