- Annuloceras
Taxobox
name = "Annuloceras"
image_caption = "Annuloceras summersi"
image_width = 125px
fossil_range = LowerBarremian of theCretaceous
regnum =Animal ia
phylum =Mollusc a
classis =Cephalopod a
subclassis =Ammonoidea
familia =Heteroceratidae
genus = "Annuloceras"
genus_authority =
subdivision_ranks =
subdivision =
*"A. summersi""Annuloceras" ("Ringed Horns") is an extinct genus of
ammonite cephalopod . Its fossils are found in LowerBarremian sediments fromCalifornia .It is a heteromorph ammonite very similar in form to "
Macroscaphites ", and "Shastoceras ", the latter being its close (albeit larger) relative that is also found the same strata in California.References
[http://links.jstor.org/sici?sici=0022-3360(199511)69:6%3C1179:ANHAFT%3E2.0.CO;2-A] A New Heteromorph Ammonite from the Barremian (Cretaceous) of California Michael A. Murphy, Peter U. Rodda, Patrick Embree Journal of Paleontology, Vol. 69, No. 6 (Nov., 1995), pp. 1179-1182
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