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pinnulate
[ pin-yuh-leyt ]
Word History and Origins
Origin of pinnulate1
Example Sentences
All the Palaeozoic representatives have non-pinnulate arms, while the Mesozoic and later forms have them pinnulate.
An anal plate always rests on the posterior basal; mouth and tegminal food-grooves closed; arms pinnulate.
Monocyclica Camerata.—Monocyclica in which the first, and often the succeeding, orders of brachials are incorporated by interbrachials in the dorsal cup, while the corresponding ambulacrals are either incorporated in, or pressed below, the tegmen by interambulacrals; all thecal plates united by suture, somewhat loose in the earliest forms, but speedily becoming close, and producing a rigid theca; mouth and tegminal food-grooves closed; arms pinnulate.
Colour bright brown, rachis shining, very dark brown; polypidom about six inches high, simply pinnulate, pinnules about half an inch; thickly and regularly disposed, alternate.
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