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Pronunciation varies by accent · noun
(zoology) Any member of the extinct genus †Rhynchonella of brachiopod, found in Silurian to Eocene strata worldwide..
It is quite possible that the Maine rhynchonellas described as R. aspasia by Billings were descended from some one of these earlier rhynchonellas not yet separated into special (literary) groups.
The material from Mejdel Shems includes a few pyritized ammonites (Nos. 5336-5339) and a couple of non-pyritized rhynchonellas (Nos. 5340-5341), all of Jurassic age.
Of the fossils which occur in great numbers, rhynchonellas, spirifers, and encrinites are common.
One of the most important of recent discoveries is that of the rhynchonella fossil in tubicolar sandstones at the Thistle Mine near Lorinna.
We have been unable to follow Chaput's description in detail, but we think that our (b) corresponds with his "reddish clays and marls with blocks of marly limestones", from which latter he obtained some of his Sowerbyceras tortistdcatum, mentioned above, as well as rhynchonellas of the group arolica (1936, pp. 52, 53).
Use rhynchonella when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Rhynchonella means (zoology) Any member of the extinct genus †Rhynchonella of brachiopod, found in Silurian to Eocene strata worldwide..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
It is quite possible that the Maine rhynchonellas described as R. aspasia by Billings were descended from some one of these earlier rhynchonellas not yet separated into special (literary) groups.
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