mollusc shell
81trochoid — [ trəʊkɔɪd] adjective 1》 Anatomy denoting a joint in which one element rotates on its own axis (e.g. the atlas vertebra). 2》 Geometry denoting a curve traced by a point on a radius of a circle rotating along a straight line or another circle. 3》… …
82κογχυλιωδῶν — κογχυλιώδης like a mollusc shell masc/fem/neut gen pl (attic epic doric) …
83operculum — n. (pl. s or la) lid like organ, as of moss capsule and mollusc shell; fish s gill cover. ♦ opercular, a. ♦ operculate, a …
84hermit — n. 1 an early Christian recluse. 2 any person living in solitude. Phrases and idioms: hermit crab any crab of the family Paguridae that lives in a cast off mollusc shell for protection. hermit thrush a migratory N. American thrush, Catharus… …
85molluscan — mollusc (US mollusk) ► NOUN Zoology ▪ an invertebrate animal of a large group including snails, slugs, and mussels, with a soft unsegmented body and often an external shell. DERIVATIVES molluscan adjective. ORIGIN from Latin mollis soft …
86Halkieria — Taxobox name = Halkieria fossil range = fossil range|533|511|Lower to Middle Cambrian image title = Halkieria evangelista from the Lower Cambrian Sirius Passet, North Greenland regnum = Animalia phylum = ?Mollusca unranked ordo = Halwaxiida… …
87Kimberella — Taxobox image caption = Cast of a partial Kimberella fossil. The bulges at the top of the image are the sides of the organism, and surrounded the rim of the creature; these are further flanked with a line which may represent the extent of a… …
88Halwaxiida — taxobox image caption= Halkieria regnum=Animalia fossil range=Early to Middle Cambrian superphylum=Lophotrochozoa phylum = See text Halwaxiida or halwaxiids is a proposed clade loosely uniting scale bearing Cambrian animals, which may lie in the… …
89Conchology — Part of a series on Zoology …
90Debate about Cambrian Lophotrochozoans — Since 1990 there has been intense debate among paleontologists about the evolution in the Early Cambrian period of the super phylum Lophotrochozoa, which is thought to include the modern molluscs, annelid worms and brachiopods, as well as their… …
