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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]
The cephalopods were once thought to have evolved from a monoplacophoran-like ancestor [8] with a curved, tapering shell, [9] and to be closely related to the gastropods (snails). [10]
Some cephalopods accompany this expulsion of water with a gunshot-like popping noise, thought to function to frighten away potential predators. [72] Cephalopods employ a similar method of propulsion despite their increasing size (as they grow) changing the dynamics of the water in which they find themselves.
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 ...
Triassic cephalopods of North America (1 C, 1 P) Pages in category "Cephalopods of North America" The following 14 pages are in this category, out of 14 total.
The northern cardinal is the state bird of Ohio. This list of birds of Ohio includes species documented in the U.S. state of Ohio and accepted by Ohio Bird Records Committee (OBRC). As of November 2024, there were 451 species on the official list. [ 1 ]
Cephalopods were at one time the largest of all ... (2010i:364) wrote that "this old record might be in error", with the species commonly growing to 160 cm (5.2 ...
Paralarvae (sg.: paralarva) are young cephalopods in the planktonic stages between hatchling and subadult. This stage differs from the larval stage of animals that undergo true metamorphosis. [1] Paralarvae have been observed only in members of the orders Octopoda and Teuthida. [2] The term was introduced by Richard E. Young and Robert F ...