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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]
Cephalopods are very abundant and are larger in size than those found in the Kope Formation, because of the increase in food availability for these predators following the late Cambrian. [2] Cephalopods survived well in this time period because they were able to prey on the many gastropods and mollusks that are also found in this formation. [2]
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.
The majority of birds that migrate through Ohio each spring will do so in May. "Then in June, we see the stragglers," Emmert said. Cuckoos are one of the most common species that tend to fly ...
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 ...
This category covers articles about cephalopods as individual species or groups. For more information, see cephalopod . Pages in this category should be moved to subcategories where applicable.
16 Ohio counties touched by worst intensity on drought scale The U.S. Drought Monitor breaks counties into one of five intensity rankings, from D0 Abnormally Dry to D4 Exceptional Drought.