Biology:Promicroceras

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Promicroceras
Temporal range: Sinemurian[1]
Promicroceras pyritosum
Scientific classification e
Script error: No such module "Taxobox ranks".: Animalia
Script error: No such module "Taxobox ranks".: Mollusca
Script error: No such module "Taxobox ranks".: Cephalopoda
Script error: No such module "Taxobox ranks".: Ammonoidea
Script error: No such module "Taxobox ranks".: Ammonitida
Script error: No such module "Taxobox ranks".: Eoderoceratidae
Script error: No such module "Taxobox ranks".: Eoderoceratinae
Script error: No such module "Taxobox ranks".: Promicroceras
Spath, 1925
Species[2]
  • P. capricornoides
  • P. cowapi
  • P. marstonense
  • P. planicosta
  • P. precompressum
  • P. pyritosum

Promicroceras is an extinct ammonite genus from the upper Sinemurian (Lower Jurassic)[1] of Europe, named by Leonard Spath in 1925. Promicroceras is included in the family Eoderoceratidae, which is part of the ammonitid superfamily Eoderoceratoidea.

Shells are evolute with an open umbilicus; strongly ribbed, ribs flattened on the venter, and with small spines without distinct tubercles.

Distribution

Promicroceras species are commonly found in South West England, particularly along the Dorset coast.[2]

Pyritic Promicroceras fossils are commonly found along the coast of Lyme Regis and Charmouth where they are well preserved in the Lower Jurassic (Sinemurian) Black Ven Marl. Fossil shops in the area commonly sell cleaned and polished Promicroceras.

References

Notes
Bibliography
  • Treatise on Invertebrate Paleontology, Part L Ammonoidea ; Geological Society of America and Univ of Kansas press, 5th printing,1990. (L345-347)
  • Die Ammoniten des süddeutschen Lias. Ein Bestimmungsbuch für Fossiliensammler und Geologe.

Wikidata ☰ Q3980580 entry