Cryptoconchus oliveri, Schwabe, 2004

Schwabe, Enrico, 2004, The Polyplacophora (Mollusca) collected during the First International Marine Biodiversity Workshop for Rodrigues (western Indian Ocean), with the description of a new species, Journal of Natural History 38 (23), pp. 3143-3173 : 3164-3165

Cryptoconchus oliveri n. sp.

( figures 14– 16 , 17E )

Cryptoconchus porosus: Leloup, 1981a: 21 [non (de Blainville MS, Burrow, 1815)]. Cryptoconchus burrowi: Kaas, 1985a: 331 ; 1986: 20 [non ( Nierstrasz, 1905)].

Material examined. 2 spms, ca 9.6 6 4.9 mm (curled) (pd), 8.4 6 5 mm: RDS

35, Grande Baie, 19 ‡ 39.047 ’ S, 63 ‡ 26.381 ’ E, 21.5 m, coral rubble, leg. N. Bruce.

The larger disarticulated specimen becomes the holotype, which is deposited in NMGW ( NMW.Z.2001.061.00001), the other, selected as paratype, is deposited in the author’s collection (ES coll. 235). In addition, material from the MNHN, cited

by Kaas (1986) gets paratype status. The specimens are preserved in ethanol and measure 8.4 6 2.4 mm ( Mayotte: récif M’sanga Tsohole St. 66, 5 m; 12 ‡ 41.8 ’ S 44 ‡ 58.7 ’ E; leg. P. Bouchet, 29 March 1977) (16 ctenidia on both sides of the foot) and 15.6 6 6 mm .

Figures

FIG. 14. Cryptoconchus oliveri n. sp. (A) Dorsal view of head valve; (B) close-up of the tegmentum region of the head valve; (C) dorsal view of the second valve; (D) close-up of the posterior tegmentum region of the second valve; (E) dorsal view of the tail valve; (F) close-up of the tegmentum of the tail valve. Scale bars: 1 mm (A, C); 200 Mm (B, D, F); 500 Mm (E).

FIG. 15. Cryptoconchus oliveri n. sp. (A) Radula; (B) close-up of the head of the major lateral tooth and the spatulate uncinal tooth from the right side; (C) frontal-lateral view of the central tooth; (D) nude dorsal girdle surface; (E) close-up of the pores, to show an empty pore and a spicule in situ; (F) isolated dorsal girdle spicules. Scale bars: 100 Mm (A); 50 Mm (B, C); 250Mm (D); 15Mm (E); 20 Mm (F).

FIG. 16. Cryptoconchus oliveri n. sp. (A) Dorsal girdle, close-up to show a single spicule in situ; (B) ventral girdle scales in situ; (C, D) isolated ventral girdle scales. Scale bars: 15 Mm (A, D); 50 Mm (B); 20 Mm (C).

FIG. 17. (A) Parachiton hylkiae mauricejayi Schwabe, 2002, complete animal, posteriorlateral view (length: 7 mm); (B) Callochiton deshayesi Thiele, 1909, complete animal, dorso-lateral view (length: 2.5 mm); (C) Callistochiton barnardi Leloup, 1981, complete animal (now partly disarticulated), dorsal view (length: 4.2 mm); (D) Choneplax indica Odhner, 1919, complete animal, dorso-lateral view (length: 5.7 mm); (E) Cryptoconchus oliveri n. sp., paratype, complete specimen, dorsal view (length: 15.6 mm); (F) Onithochiton maillardi (Deshayes, 1863), complete specimen, dorsal view (length: 15.7 mm); (G, H) Lucilina indica (Leloup, 1981): (G) complete specimen, dorsal view (length: 5.8 mm); (H) holotype, partly dissected specimen, dorsal view (length: 8 mm).