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Evolutionary theory says all animals that are walking on land actually evolved from sea-dwelling creatures at some point in the ancient past. To study this further, scientists from McGill ...
Tiktaalik (/ t ɪ k ˈ t ɑː l ɪ k /; Inuktitut ᑎᒃᑖᓕᒃ) is a monospecific genus of extinct sarcopterygian (lobe-finned fish) from the Late Devonian Period, about 375 Mya (million years ago), having many features akin to those of tetrapods (four-legged animals). [1]
Pezosiren portelli, [2] also known as the "walking manatee", is a basal sirenian from the early Eocene of Jamaica, 50 million years ago.The type specimen is represented by a Jamaican fossil skeleton, described in 2001 by Daryl Domning, [3] a marine mammal paleontologist at Howard University in Washington, DC.
Either way, the name refers to the loon's poor ability to walk on land. [17] Another possible derivation is from the Norwegian word lom for these birds, which comes from Old Norse lómr, possibly cognate with English "lament", referring to the characteristic plaintive sound of the loon. [18] The scientific name Gavia refers to seabirds in ...
Native to south-east Asia, this fish has strong spines on its pectoral fins that enable its body to "walk" across dry land. It travels from waterhole to waterhole, where it seeks refuge and makes ...
Despite eurypterids clearly being primarily aquatic animals that almost certainly evolved underwater (some eurypterids, such as the pterygotids, would even have been physically unable to walk on land), it is unlikely the "gill tract" contained functional gills when comparing the organ to gills in other invertebrates and even fish.
List of extinct animals of Romania; List of fossil species in the La Brea Tar Pits, California, United States; List of fossil species in the London Clay, England; List of White Sea biota species by phylum, Russia; Paleobiota of the Hell Creek Formation, northern United States; Paleobiota of the Morrison Formation, western United States
Based on the pelvis and robust forelimbs, Thewissen believed Ambulocetus was capable of venturing onto land, and was more efficient at doing this than remingtonocetids and protocetids (it is unclear if the latter two were capable of bearing weight on the limbs). [5] Ambulocetus possibly used a sprawling gait on land, similar to modern sea lions ...