Audaxlytoceras

Audaxlytoceras is an extinct genus of lytoceratid ammonites.[2]

Audaxlytoceras
Temporal range:
Fossil shell of Audaxlytoceras audax from Pliensbachian of Morocco (Talsint)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Family: †Lytoceratidae
Subfamily: †Alocolytoceratinae
Genus: †Audaxlytoceras
Fucini, 1923
Species[2]
  • A. apertum
  • A. audax
  • A. grandonense
  • A. spirorbis
  • A. varicosum

Taxonomy

The Middle Jurassic Nannolytoceras is its closest relative. Aegolytoceras and Peripleuroceras Tutcher and Trueman 1925 are synonyms.[2]

Fossil record

This genus is known in the fossil record from the Lower Jurassic (Pliensbachian) [1] (from about 190.8 to 182.7 million years ago). Fossils of species within this genus have been found in France, Germany, Italy, Morocco and Spain.[2]

Description

Its shell is small, smooth, evolute (all whorls showing), only slightly impressed dorsally (along the inner rim). Whorls are compressed, subquadrate in section, higher than wide, with few narrow constrictions. The suture relatively simple with a long ventral lobe and two lateral lobes.[3]

Bibliography
  • Arkell et al., 1957. Mesozoic Ammonoidea, Systematic Descriptions. Treatise on Invertebrate Paleontology Part L, Ammonoidea. Geol Soc of Amer. and Univ Kans. Press. L199
  • Fantini Sestini N. (1973). Revisione del genere “Audaxlytoceras” Fucini, 1923 (Ammonoidea). Rivista Italiana di Paleontologia e Stratigrafia, 79 (4): 479–502.
  • Federico Venturi, Carlo Nannarone, Massimiliano Bilotta - Early Pliensbachian ammonites from the Furlo Pass (Marche, Italy): two new faunas for the middle-western Tethys

See also

References
  1. Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  2. Paleobiology Database - Audaxlytoceras. 2014-05-29.
  3. Arkell et al., 1957. Mesozoic Ammonoidea, Systematic Descriptions. Treatise on Invertebrate Paleontology Part L, Ammonoidea. Geol Soc of Amer. and Univ Kans. Press. L199


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