| PROPEAMUSSIIDAE | Propeamussium investigatoris (Smith, 1906) |
| Figure(s) |
Lectotype
lv - close up
|
| Original name | Amussium investigatoris Smith, 1906 |
| Autoreference | Smith, 1906: 255. |
| Reference | Smith, E.A., 1906. Natural history notes from H.M. India Marine Survey Steamer "Investigator", Ser. 3 (10). On Mollusca from the Bay of Bengal and the Arabian Sea. - Annals and Magazine of Natural History (7) 18: 157-175, 245-264. |
| Type data | Lectotype (pr: H 25 mm, L 23 mm, D 4.5 mm) Zoological Survey of India, New Alipore, Calcutta (ZSI M835/1), designated by Dijkstra & Kastoro (1997: 250). Type locality: Laccadive Sea, W of Travancore, 08*37'N, 75*37'30"E, 410-519 m, alive, sand, 17.10.1898 ("Investigator" stn 248). |
| Description | Shell up to ca. 25 mm high, fragile, semi-transparent, weakly inflated, left valve slightly more convex than right valve, subcircular, inequivalve, nearly equilateral, auricles unequal in size and shape, colour of left valve creamy or orange-tinted, right valve whitish. Left valve with many irregularly spaced radial lirae, squamous near ventral margin. Reticulate microsculpture in early growth stage. Auricles with delicate squamous radial riblets (7-10), weaker on right valve. Right valve with commarginal sculpture. Internal ribs 10 with 2 auricular riblets and some interstitial rudimentary riblets near the margin. Byssal notch and ctenolium lacking. |
| Distribution |
Laccadive Sea (TL), Indonesia, Coral Sea, New Caledonia, Loyalty Islands, Norfolk Island, Kermadec Islands, Vanuatu Archipelago |
| Habitat | Living bathyally on soft bottom assemblages. |
