Mesodactylites

Mesodactylites, which is sometimes considered to be a synonym of Nodicoeloceras[2] is genus of ammonite that lived during early to middle Toarcian stage (Serpentinum to Bifrons ammonite Zones) of early Jurassic. Their fossils were found in southern and central Europe and northern Africa. It has evolved from Nodicoeloceras.[1]

Mesodactylites
Temporal range: Toarcian [1]
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Family: †Dactylioceratidae
Subfamily: †Nodicoeloceratinae
Genus: †Mesodactylites
Pinna et Levi-Setti, 1971
Type species
Coeloceras annulatiforme
Bonarelli, 1899
Species
  • M. annulatiformis Bonarelli, 1899
  • M. mediterraneus Renz, 1912
  • M. broilii Mitzopoulos, 1930
  • M. sapphicus Renz, 1912
  • M. merlai Pinna, 1969
  • M. pisznicenzis Kovacs, 2014

Description

Ammonites belonging to this genus have small to medium sized shells. Coiling is cadicone to moderately evolute. Subcircular whorl section has convex flanks and rounded venter. Ribs can be simple or bifurcating. On ventrolateral position, there are tubercules, mostly on phragmocone.[1]

References
  1. Kovács, Z. (2014). Toarcian Dactylioceratidae (Ammonitina) from the Gerecse Mts (Hungary). Hantkeniana, 9, 45-77.
  2. M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.


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