CYCLOCHLAMYDIDAE

Cyclochlamys irregularis

Dijkstra & Marshall, 2008

Figures

 

                         Holotype (lv)                                    Paratype (rv)                           

Original name  Cyclochlamys irregularis Dijkstra & Marshall, 2008
Autoreference   Dijkstra & Marshall, 2008: 28, figs 24, 25A-E.
Reference   Dijkstra, H.H. & B.A. Marshall, 2008. The Recent Pectinoidea of the New Zealand region (Mollusca: Bivalvia: Propeamussiidae, Pectinidae and Spondylidae). - Molluscan Research 28(1): 1-88, 70 figs.
Type data   Holotype (lv: H 1.80 mm) Museum of New Zealand Te Papa Tongarewa (NMNZ M.183889). Type locality: New Zealand, off Whangaroa Bay, 34*54.0'S, 173*42.6'E, 83 m, dead, RV 'Tangaroa', 26.i.1981.
Description

  Shell small up to 3 mm high, fragile, outline irregular, variable and changing during ontogeny, about as wide as high, inequilaterial, oblique posteriorly, posterior auricle larger than anterior, translucent white.

  Left valve sculptured with widely, irregularly spaced commarginal lamellae, traversed by slightly finer radial riblets, multiplying by intercalation. Right valve with outer layer of commarginally elongate, hexagonal prisms. Byssal notch of moderate depth, byssal fsciole rather broad. Internal riblets lacking.

Distribution

 

N North Island, New Zealand (TL)

Habitat   Shells sublittorally and bathyally on soft bottom assemblages.