''Microdactylites'', which is sometimes considered to be a synonym of ''
Dactylioceras'',
[M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.] is genus of
ammonite
Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...
that lived during early to middle
Toarcian stage (Serpentinum to lower Bifrons ammonite Zones) of
early Jurassic. Their fossils were found in England, France, Italy, Germany and Hungary. Species belonging to this genus were microconchs of ''Dactylioceras''.
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Description
Ammonites belonging to ''Microdactylites'' have small shells with evolute, compressed coiling. Flanks are slightly convex to convex and whorl section is suboval to subcircular. Ribbing is dense, while ribs can be both simple or bifurcating.[Kovács, Z. (2014). Toarcian Dactylioceratidae (Ammonitina) from the Gerecse Mts (Hungary). Hantkeniana, 9, 45-77.]
References
Ammonitida
Toarcian life
Early Jurassic ammonites of Europe
Ammonite genera
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