Misplaced Pages

Leymeriellidae

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Extinct family of molluscs

Leymeriellidae
Temporal range: Albian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Suborder: †Ammonitina
Superfamily: †Acanthoceratoidea
Family: †Leymeriellidae
Breistroffer, 1951
Genera

See text

Leymeriellidae is an extinct family of Lower Cretaceous ammonites comprising rather small forms distinguished from Hoplitidae by their flattened and grooved ribs and virtual absence of umbilical tubercles. The family is derived from the Desmoceratidae. Leymeriella schrammeni anterior has evolved from Desmoceras keilhacki keilhacki.

Taxonomic position

Leymeriellidae are currently regarded is belonging to the Acanthoceratoidea according to W. J. Kennedy et al (1980). The previous placement was in the Hoplitoidea according to W.J. Arkell et al (1957) in the Treatise on Invertebrate Paleontology, Part L.

Genera

This article is in list format but may read better as prose. You can help by converting this article, if appropriate. Editing help is available. (April 2013)

Leymeriellidae includes the following genera:

  • Leymeriella Jacob 1907. Shell evolute, venter flat to sulcate. Ribs single, wide spaced, grooved in outer part. Lower Albian to Middle Albian
  • Proleymeriella Breistroffer 1947. Shell moderately evolute, whorl section oval with constrictions present throughout. Ribs single, strong, form chevrons on a narrowly rounded to acute venter. Lower Albian
  • Epileymeriella Breistroffer 1947. Differs from Leymeriella in that the ribs branch from weak umbilical bullae. Lower Albian

References

This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (April 2013) (Learn how and when to remove this message)
  1. BERT, D. Les ammonites du niveau Paquier (Albien basal, Crétacé inférieur) du Sud-Est de la France. Fossiles, 2012, 12: 4-25.
  2. Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
  • W.J. Kennedy et al. 1980. Albian and Cenomanian ammonites from the island of Bornholm (Denmark). Bull. geol. Soc. Denmark 29:203-244
  • Leymeriellidae Paleobiology Database.
Taxon identifiers
Leymeriellidae
Categories: