Tetrapod (structure) - Wikipedia
WEBA wave-dissipating concrete block is a naturally or manually interlocking concrete structure designed and employed to minimize the effects of wave action upon shores and shoreline structures, such as quays and jetties. One of the earliest …
Muddy tetrapod origins - Nature
WEBJan 6, 2010 · The discovery of fossil trackways made by four-legged land vertebrates (tetrapods) almost 400 million years ago will cause a significant reappraisal of our understanding of tetrapod origins.
Early tetrapod trackways - Wikipedia
WEBThere are several cases of reported trackways of the earliest land-going vertebrates, also known as tetrapods. These trackways provide crucial insights to the study of the transition of aquatic to terrestrial lifestyles in vertebrate evolution.
Covering coasts with concrete: Japan looks to Tetrapods to …
WEBNov 25, 2016 · A Tetrapod (which, Japanese engineers are quick to remind you, is a proper name, even if it has become a generic catchall) is a four-footed, porous, concrete “breakwater barrier” used to prevent...
Footprints could push back tetrapod origins - Science News
WEBJan 6, 2010 · Fossilized footprints found in an abandoned quarry in Poland hint that four-limbed creatures called tetrapods evolved much earlier and in a radically different environment than previously thought.
Loving and Loathing Japan’s Concrete Coasts, Where Tetrapods …
WEBJul 12, 2007 · It’s not clear how much cement has been cast into tetrapods and scattered along Japan’s coast, but one thing IS clear: An incredible percentage of Japan’s shoreline has been accessorized with concrete walls, blocks and tetrapods.
Tetrapod - Wikipedia
WEBCross-section of a labyrinthodont tooth. Tetrapods had a tooth structure known as "plicidentine" characterized by infolding of the enamel as seen in cross-section. The more extreme version found in early tetrapods is known …
Sustained high rates of morphological evolution during the rise of ...
WEBAug 23, 2021 · Here, we use advances in Bayesian morphological clock modelling to reveal the evolutionary dynamics of early tetrapodomorphs (tetrapods and their closest fish relatives).
Tetrapod trackways from the early Middle Devonian period of …
WEBJan 7, 2010 · The earliest body fossils of tetrapods date to the Late Devonian period (late Frasnian stage) and are preceded by transitional elpistostegids such as Panderichthys and Tiktaalik that still have...
Tetrapod tracks reset timing of four-legged evolution - EARTH …
WEBJan 5, 2012 · A new study published in Nature describes tracks belonging to a tetrapod in a Polish tidal flat, dating to the Middle Devonian period, about 395 million years ago. The discovery may prompt scientists to completely reassess the environment, origins and timing of early tetrapods.