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The marine life of Ohio included crinoids, snails, cephalopods, brachiopods, and fishes. Trilobites were also present, but their fossils are rare. [4] By the Permian period the sea had left completely. Local bodies of water were then lakes and rivers rather than saltwater. [3] Southeastern Ohio was a swamp-covered coastal plain. [4]
Interpretations by Engeser (1996–1998) suggests that nautiloids, and indeed cephalopods in general, should be split into two main clades: Palcephalopoda (including all the nautiloids except Orthocerida and Ascocerida) and Neocephalopoda (the rest of the cephalopods). Palcephalopoda is meant to correspond to groups which are closer to living ...
The cephalopods have a long geological history, with the first nautiloids found in late Cambrian strata. [1]The class developed during the middle Cambrian, and underwent pulses of diversification during the Ordovician period [2] to become diverse and dominant in the Paleozoic and Mesozoic seas.
Extant cephalopods range in size from the 10 mm (0.3 in) Idiosepius thailandicus [3] to the 700 kilograms (1,500 lb) heavy Colossal squid, the largest extant invertebrate. [ 4 ] [ 5 ] Distribution
Actinoceras is the principal and root genus of the Actinoceratidae, a major family in the Actinocerida, that lived during the Middle and Late Ordovician.It is an extinct genus of nautiloid cephalopod that thrived in the warm waters of the United States and England during the Paleozoic era.
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Cephalopods of North America — a primarily prehistoric class of Molluscs in North America. With some extant/surviving Holocene/present day species. Subcategories.
Ohio skies are filled this time of year with hundreds of species of birds flying north for the summer.. The height of the spring migration — known as The Biggest Week in American Birding — is ...