Rhynchonella Explained

Rhynchonella is an extinct genus of brachiopod known from the Late Jurassic (Oxfordian) to the Early Cretaceous (Valanginian, possibly Barremian).^[1] Formerly^[2] this genus was understood much more widely (more or less an equivalent of the Rhynchonellida order in the present-day taxonomy) and less critical sources still list species of Rhynchonella from the Ordovician to the Eocene. Like most brachiopods, Rhynchonella was a stationary epifaunal suspension feeder.

Description

These 1.75 to 3.75 cm long articulate brachiopods are characterized by a triangular shell with a spherical profile, powerful ribs, a curved hinge line and a small umbo. The anterior margin shows a tongue like projection.^[3]

Species

• Rhynchonella acuminata † Martin 1809
• Rhynchonella adrianensis † Gemmellaro 1899
• Rhynchonella boloniensis † (d'Orbigny, 1850)
• Rhynchonella carapezzae † Gemmellaro 1899
• Rhynchonella carinthiaca † Bittner 1890
• Rhynchonella confinensis † Schellwien 1892
• Rhynchonella djeffarae † Dubar 1967
• Rhynchonella edwardsi † Chapuis & Dewalque 1853
• Rhynchonella eskiordensis † Moisseiev 1932
• Rhynchonella fraasi † Oppel 1861
• Rhynchonella granulum † Eichwald 1860
• Rhynchonella inflata † Jaboli 1959
• Rhynchonella jukesi † McCoy 1847
• Rhynchonella kochigataniensis † Tokuyama 1957
• Rhynchonella krotovi † Tschemyschew 1902
• Rhynchonella lacuna † Quenstedt 1871
• Rhynchonella langleti † Chapuis & Dewalque 1853
• Rhynchonella limbata † Schlotheim 1813
• Rhynchonella lingulata † Gabb 1864
• Rhynchonella loxia † Fischer von Waldheim 1809
• Rhynchonella maudensis † Whiteaves 1884
• Rhynchonella minuta † Buvignier 1843
• Rhynchonella miquihuanensis † Imlay 1937
• Rhynchonella misella † Bittner 1890
• Rhynchonella negrii † Gemmellaro 1899
• Rhynchonella paolii † Canavari 1880
• Rhynchonella paucicosta † Kitchin 1910
• Rhynchonella pauciplicata † Kitchin 1900
• Rhynchonella prona † Oppel 1861
• Rhynchonella pseudoazaisi † Dubar 1967
• Rhynchonella pugnus † Martin
• Rhynchonella pupula † Bittner 1890
• Rhynchonella salinasi † Gemmellaro 1899
• Rhynchonella sosiensis † Gemmellaro 1899
• Rhynchonella subrimosa † Schafhauti 1851
• Rhynchonella tazerdunensis † Dubar 1967
• Rhynchonella texanus † Shumard 1859
• Rhynchonella wichmanni † Rothpletz 1892
• Rhynchonella withei † Gemmellaro 1899

References

• Frank H.T. Rodes, Herbert S. Zim en Paul R. Shaffer (1993) - Natuurgids Fossielen (het ontstaan, prepareren en rangschikken van fossielen), Zuidnederlandse Uitgeverij N.V., Aartselaar. ISBN D-1993-0001-361

Notes and References

1. Norman M. Savage et al., Rhynchonellida, [In:] Roger L. Kaesler (ed.), Treatise on Invertebrate Paleontology. Part H, Brachiopoda, Revised, Volume 4: Rhynchonelliformea (part), Boulder, Colorado–Lawrence, Kansas: The Geological Society of America, Inc. and The University of Kansas, 2002, pp. 1026–1376.
2. Ager . Derek V. . 1957 . The true Rhynchonella . Palaeontology . 1 . 1 . 1–15.
3. http://www.preservearticles.com/2011090212627/short-notes-on-shell-spirifer-rhynchonella-and-terebratula.html Short notes on Shell, Spirifer, Rhynchonella and Terebratula