Article · Wikipedia archive · Last revised Jul 23, 2026

Aplococeras

Aplococeras is an evolute discoidal ceratitid ammonite from the Middle Triassic Ladinian stage, found in southern Europe and Nevada. Whorl sides are convex, converging on a rounded venter, and are ornamented with slightly flexuous umbilical ribs that disappear outwardly, towards the venter. The suture has two lateral lobes.

Last revised
Jul 23, 2026
Read time
≈ 1 min
Length
131 w
Citations
1
Source
Wikipedia ↗
Aplococeras
Temporal range: Middle Triassic
Example species fossil
Aplococeras misanii
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ceratitida
Family: †Aplococeratidae
Genus: †Aplococeras
Hyatt, 1900
Synonyms1
  • Pseudaplococeras Spath, 1951

Aplococeras is an evolute discoidal ceratitid ammonite from the Middle Triassic Ladinian stage, found in southern Europe and Nevada. Whorl sides are convex, converging on a rounded venter (the outer rim), and are ornamented with slightly flexuous umbilical ribs that disappear outwardly, towards the venter. The suture has two lateral lobes (on either side).

Apleuroceras and Velebites are related genera also from the Ladinian (Middle Triassic).

References

References

  • Arkel,et al, 1957. Mesozoic Ammonoidea; Treatise in Invertebrate Paleontology Part L (L158). Geological Society of America and University Kansas Press.
  • Paleobiology Database Aplococeras entry accessed 9 December 2011