- Source: Anisoceras
Anisoceras is a heteromorph ammonite belonging to the turrilitoid family Anisoceratidae. The shell forms a loose open helical spiral in the early stages, ending in one or two straight shafts in the mature adult. Surface ornament consists of prominent rounded nodes on the lower and upper flanks, connected by strong looped ribs. The nodes may have been the bases of long sharp spines.
References
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.
Marcinowski and Wiedmann. The Albian Ammonites of Poland. Palaeontologia Polonica no. 50, 1990
The Paleobiology Database Anisoceras entry
Kata Kunci Pencarian:
- Anisoceras
- Ancita anisocera
- Anisoceratidae
- Paw Paw Formation
- Ancyloceras
- List of ammonite genera
- Riachuelo Formation
- Gable Creek Formation
- Tlayúa Formation
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