Callochiton clausadeae Kaas & Van Belle, 1985

Dell’Angelo, Bruno, Gori, Sandro, Baschieri, Leonardo & Bonfitto, Antonio, 2010, Chitons (Mollusca, Polyplacophora) from the Maldive islands, Zootaxa 2673 (1), pp. 1-38 : 9-11

publication ID	https://doi.org/10.11646/zootaxa.2673.1.1
DOI	https://doi.org/10.5281/zenodo.5311665
persistent identifier	https://treatment.plazi.org/id/03D7EE78-FFDC-FF80-FF7F-F8E1FF33B7A6
treatment provided by	Felipe (2021-08-23 07:23:52, last updated by Plazi 2023-11-04 11:46:51)
scientific name	Callochiton clausadeae Kaas & Van Belle, 1985
status

Treatment

Callochiton clausadeae Kaas & Van Belle, 1985 View in CoL

( Figures 4A–C View FIGURE 4 )

Callochiton clausadei Kaas & Van Belle 1985: 42 View in CoL , fig. 17 (incorrect denomination, emended by Kaas 1986). Callochiton clausadeae View in CoL ; Dell’Angelo et al. 2004: 51, pl. 3, figs 1–3 (bibliography and synonymy).

Type: MNHN (holotype + seven paratypes) , RMNH K 4993 About RMNH /1 (paratype) .

Type locality: Madagascar, Tuléar , in caves, outer slope, 4–34 m.

Material examined: M13: 30 valves (4 head, 20 intermediate and 6 tail); M19: 2 intermediate valves; M20: 1 intermediate valve; M26: 7 valves (1 head, 4 intermediate and 2 tail); M65: 6 valves (3 intermediate and 3 tail); MLD01A: 6 valves (1 head, 4 intermediate and 1 tail); MLD02A: 12 valves (2 head, 8 intermediate and 2 tail); MLD03A: 4 valves (3 intermediate and 1 tail); MLD04B: 1 intermediate valve; MLD05A: 2 intermediate valves; MLD05B: 3 intermediate valves; LB04: 1 intermediate valve; LB05: 18 valves (2 head, 11 intermediate and 5 tail).

Remarks: A detailed description of this species is given by Kaas & Van Belle (1985). Collected valves agree with those of C. clausadeae , although their preservation is not very good. The only appreciable difference found relates to its slit formula, 12–16/1/12–15 vs. 18/1/12 reported by Kaas & Van Belle (1985). Also the pits in pleural areas are variable in number, up to 7–8 vs. 4–6 reported by Kaas & Van Belle (1985); some are more elongated and the outer ones can reach the anterior margin.

This is the first report of this species for the Maldive Islands.

Distribution: Callochiton clausadeae is reported from Madagascar, Mauritius, Réunion, and the Maldive Islands.

References

Kaas, P. & Van Belle, R. A. (1985) Monograph of Living Chitons (Mollusca: Polyplacophora). Volume 2. Suborder Ischnochitonina, Ischnochitonidae: Schizoplacinae, Callochitoninae & Lepidochitoninae. E. J. Brill / W. Backhuys, Leiden, 198 pp.

Kaas, P. (1986) Revision of the chitons (Mollusca: Polyplacophora) from the coral-reefs of Tulear, SW Madagascar, and of the Mascarene Islands. Mesogee, 46, 9 - 23.

Smith, E. A. (1903) Marine Mollusca. In: Gardiner, J. S., The Fauna and Geography of the Maldive and Laccadive Archipelagoes. Cambridge, University Press, 589 - 630, pls 35 - 36.

Figures

FIGURE 4A–C, Callochiton clausadeae Kaas & Van Belle, 1985, tail valve, Maldive, M13. A–B, dorsal and lateral views, respectively. C, detail of the sculpture. D–F, Callochiton sp., S. Nilandu Atoll, Maldive, NHM 1903.4.11.71 (living specimen collected by J.S. Gardiner, not coated). D, detail of the sculpture of an intermediate valve. E, dorsal view of the complete specimen. F, girdle dorsal spicules in situ. G–I, Rhyssoplax maldivensis (E.A. Smith, 1903), Maldive, MLD02A. G, intermediate valve, dorsal view. H–I, tail valve, dorsal and lateral views, respectively. J–O, Tegulaplax hululensis (E.A. Smith, 1903), Maldive, M13. J–L, head valve. J–K, dorsal and lateral views. L, detail of the sculpture. M–O, tail valve. M–N, dorsal and lateral views, respectively. O, detail of the sculpture. Scale bars 1 mm: E, G, J, K, M, N; 500 µm: A, B, D, H, I; 100 µm: C, F, L; 50 µm: O.