Vermiceras

Not to be confused with Vericeras.

Vermiceras is an ammonite that belongs to the order Ammonitida.^[2] Its shell is evolute and is covered in nonbranching ribs. Its whorls do not increase in size very fast, but there are many revolutions on its shell, which is fairly narrow. It has a sharp ventral keel and a diameter of about 5.2 centimeters (2 inches). It lived in the Early Jurassic.

Vermiceras Temporal range: Hettangian–Sinemurian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Vermiceras scylla fossil
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Arietitidae
Subfamily:	†Arietitinae
Genus:	†Vermiceras Hyatt, 1889
Species
See text
Synonyms
Metophioceras Protocymbites Gyrophioceras Paracaloceras

Subgenera and species

• V. (=Metophioceras) galaczi
• V. (=Metophioceras) rotarium
• V. (=Metophioceras) rotticus
• V. (=Metophioceras) trigonatum
• V. (=Protocymbites) azzouzi
• V. densicostatum
• V. (Gyrophioceras)
  • V. (G.) mineralense
  • V. (G.) morganense
  • V. (G.) praespiratissimum
  • V. (G.) supraspiratum
• V. (Paracaloceras)
  • V. (P.) concavum
  • V. (P.) coregonense
  • V. (P.) multicostatum
  • V. (P.) rursicostatum
  • V. (P.) varaense