Scaphites generally have a chambered, boat-shaped shell. The initial part (juvenile stage) of the shell is generally more or less involute (tightly coiled) and compressed, giving no hint of the heteromorphic shell form yet to come. The terminal part (adult stage) is much shorter, erect, and bends over the older shell like a hook. They have transverse, branching ribs with tubercles (small bumps) along the venter.
Suture pattern of Scaphites
Reconstructions of the body within the shell can be made to portray Scaphites as either a benthic (bottom-dwelling) or planktonic animal, depending on where the center of gravity is located. Since useful fossils of the soft-body parts of cephalopods are highly rare, little is known about how this animal actually fit into its shell and lived its life.[citation needed]
Ageedit
Because Scaphites and its relatives in the superfamily Scaphitoidea are restricted to certain ages of the Cretaceous (ca. 144 to 66.4 million years ago), they are useful in some areas as an index fossil. A notable example is the Late Cretaceous Western Interior Seaway in North America, in which several endemic lineages of scaphite species evolved and now serve as the basis for a highly resolved regional biostratigraphy.
A Biostratigraphic List of fossil Cephalopods in Utah
March 07, 2024
scaphites, genus, heteromorph, ammonites, belonging, scaphitidae, family, they, were, widespread, genus, that, thrived, during, late, cretaceous, period, temporal, range, cretaceous, preꞒ, from, colorado, specimen, centimetres, from, bottomscientific, classifi. Scaphites is a genus of heteromorph ammonites belonging to the Scaphitidae family They were a widespread genus that thrived during the Late Cretaceous period ScaphitesTemporal range Cretaceous 105 66 Ma PreꞒ Ꞓ O S D C P T J K Pg NScaphites sp from Colorado Specimen is 2 8 centimetres 1 1 in from top to bottomScientific classificationDomain EukaryotaKingdom AnimaliaPhylum MolluscaClass CephalopodaSubclass AmmonoideaOrder AmmonitidaSuborder AncyloceratinaFamily ScaphitidaeSubfamily ScaphitinaeGenus ScaphitesParkinson 1811SpeciesSee text Contents 1 Morphology 2 Age 3 Species 4 Distribution 5 References 6 External linksMorphology editScaphites generally have a chambered boat shaped shell The initial part juvenile stage of the shell is generally more or less involute tightly coiled and compressed giving no hint of the heteromorphic shell form yet to come The terminal part adult stage is much shorter erect and bends over the older shell like a hook They have transverse branching ribs with tubercles small bumps along the venter nbsp Suture pattern of ScaphitesReconstructions of the body within the shell can be made to portray Scaphites as either a benthic bottom dwelling or planktonic animal depending on where the center of gravity is located Since useful fossils of the soft body parts of cephalopods are highly rare little is known about how this animal actually fit into its shell and lived its life citation needed Age editBecause Scaphites and its relatives in the superfamily Scaphitoidea are restricted to certain ages of the Cretaceous ca 144 to 66 4 million years ago they are useful in some areas as an index fossil A notable example is the Late Cretaceous Western Interior Seaway in North America in which several endemic lineages of scaphite species evolved and now serve as the basis for a highly resolved regional biostratigraphy Species editScaphites binneyi Reeside 1927 Scaphites carlilensis Morrow 1935 Scaphites depressus Reeside 1927 Scaphites ferronensis Cobban 1951 Scaphites frontierensis Cobban 1951 Scaphites hippocrepis DeKay 1827 Scaphites impendicostatus Cobban 1951 Scaphites leei Reeside 1927 Scaphites nanus Reeside 1927 Scaphites nodosus Scaphites obliquus J Sowerby 1813 Scaphites preventricosus Cobban 1951 Scaphites tetonensis Cobban 1951 Scaphites uintensis Cobban 1951 Scaphites warreni Meek and Hayden 1860 Scaphites whitfieldi Cobban 1951Distribution editFossils of Scaphites have been found in Antarctica Armenia Australia Belgium Bulgaria Canada Alberta British Columbia Northwest Territories Denmark France Germany Greenland India Italy Japan Madagascar Mexico New Zealand South Africa Spain Sweden Switzerland Ukraine the United Kingdom and the United States Alabama Alaska Arizona California Colorado Delaware Kansas Maryland Minnesota Mississippi Missouri Montana Nebraska New Jersey New Mexico North Dakota Oregon South Dakota Tennessee Texas Wyoming 1 References edit nbsp Paleontology portal Scaphites at Fossilworks orgExternal links editHypothetical reconstructions of various genera of Ancyloceratida Ammonoid com A Biostratigraphic List of fossil Cephalopods in Utah Retrieved from https en wikipedia org w index php title Scaphites amp oldid 1186394794, wikipedia, wiki, book, books, library,
