Ammonite: Phricodocras cornutum (Simpson 1843)

Specimen id: 112 When found: Sunday, November 27, 1960
Where found: Cliff fall material. Wine Haven, Robin Hood’s Bay, North Yorkshire.
Geological Horizon:

Lower Jurassic
Carixian Stage
Redcar Mudstone Formation
Tragophylloceras ibex Zone

Grid Reference: NZ976023 [Map]

A very rare ammonite. On display Hull Museum.

A very rare Liparoceratid ammonite. Spath, L.F. in “ A Catalogue of the Ammonites of the Liassic Family Liparoceratidae in the British Museum 1938 p. 16. States. “The still earlier and more evolute genus Phricodoceras,Hyatt (group of Amm. Taylori C. Sowerby), which has been included in the Liparoceratidae, is probably an end form of a distinct branch of the Eoderoceratids; and it should be grouped in a separate sub-family (Phricodoceratinae nov.) which may include the incompletely known Amm. Ferstli Hauer. Judging by analogy with certain forms of Spinikosmokeras or the Albian Euhoplites proboscideus (J. de. C. Sowerby), with which Phricodoceras had actually been confused, it is incapable of producing an involute and flattened nautilicone like Parinodiceras. The inflation of the final whorl in some species (Phricodoceras lamellosum d’Orbigny sp., P. bicornis Quenstedt sp., P. subtaylori Krumbeck sp.) is comparable to the modification of the body chamber in similar tuberculate and large forms of Douvilleiceras of the Cretaceous, and is without phyletic significance.

Source Collection: The Robinson Ammonite Collection