PROPEAMUSSIIDAE

Parvamussium cancellorum

Dijkstra & Marshall, 2008

Figures

 

 Holotype

                          

Original name   Parvamussium cancellorum Dijkstra & Marshall, 2008
Autoreference   Dijkstra & Marshall, 2008: 6, figs 4A-G, 5.
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 6.6 mm, L 6.6 mm) Museum of New Zealand Te Papa Tongarewa (NMNZ M.173000). Type locality: New Zealand, southern Norfolk Ridge, NW of Cape Reinga, 33*22.61'S, 170*12.70'E, 514-540 m, dead, RV 'Tangaroa', 01.vi.2003.
Description

  Shell small up to ca. 7 mm high, fragile, semi-transparent, strongly inflated, subcircular, equivalve, almost equilateral, left valve more convex than right valve, auricles dissimilar in shape, anterior auricle considerable larger than posterior one, umbonal angle ca. 100 degrees, translucent white,typically with a few scattere, irregular opaque and yellowish brown maculations.

  Valves and auricles sculptured with crisp commarginal lamellae (lv)and ridges (rv). Byssal notch shallow, byssal fasciole narrow. Internal riblets 9-10, plus a few rudimentary.

Distribution

 

Southern Norfolk Ridge, N New Zealand(TL)

Habitat   Shells bathyally on soft bottom assemblages.