rhynchonella

plural rhynchonellas

1. biologyAny member of the extinct genus †Rhynchonella of brachiopod, found in Silurian to Eocene strata worldwide.

   Of the fossils which occur in great numbers, rhynchonellas, spirifers, and encrinites are common.

   1912, Geological Survey of New South Wales, Mineral Resources - Issues 15-20, page 59

   4 more examples

   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.

   1900, Bulletin of the United States Geological Survey

   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.

   1905, William Libbey, Franklin Evans Hoskins, The Jordan Valley and Petra - Volume 2, page 353

   One of the most important of recent discoveries is that of the rhynchonella fossil in tubicolar sandstones at the Thistle Mine near Lorinna.

   1919, Geological Survey Bulletin - Issue 30, page 34

   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).

   1956, Transactions - The Royal Society of Edinburgh - Volume 62, page 428