delthyrial
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delthyrial — del·thy·ri·al … English syllables
lamp shells — ▪ animal Introduction also called brachiopod, any member of the phylum Brachiopoda, a group of bottom dwelling marine invertebrates. They are covered by two valves, or shells; one valve covers the dorsal, or top, side; the other covers… … Universalium
delthyrium — n.; pl. ria [Gr. 4th letter, delta; thyrion, door] (BRACHIOPODA) The central triangular notch in the ventral valve, open to the hinge line; facilitating the passage of the pedicle; usually closed off from the hinge plate by the deltidium;… … Dictionary of invertebrate zoology
