Anagrammi & Informazioni su | Parola Inglese ANTIARCHS

Esempi di utilizzo di ANTIARCHS in una frase

• As with all other antiarchs, Pterichthyodes had heavily armored heads and forebodies, while their scaly tails were unarmored.
• The rhenanids were once presumed to be the most primitive, or at least the closest to the ancestral placoderm, as their armor was made up of a mosaic of tubercles, as opposed to the solidified plates of "advanced" placoderms, such as antiarchs and arthrodires.
• Unlike most other placoderm orders, such as the antiarchs or arthrodires, Gemuendina and its four other known relatives (or seven, if the three species of the ichthyolith genus Ohioaspis are confirmed to be rhenanids) had armor made up of a mosaic of unfused bony plates and scales.
• The antiarchs form the second-most successful group of placoderms after the arthrodires in terms of numbers of species and range of environments.
• It is an element of the Early Vertebrate fauna in the Xishancun Formation, and lived among polybranchiaspid galeaspids, antiarchs, arthrodires, petalichthyids and osteichthyans.
• There are three main groups of placoderms that have been found in Michigan, the antiarchs, arthrodires, and ptyctodonts.
• Yunnanolepididae is an extinct family of primitive Antiarch placoderms characterized by having short, broad skull roofs, and by having a feature on the visceral side of the posterior medial dorsal plate, the crista transversalis interna posterior, which is diagnostic of antiarchs, turning forward, and lying in front of the posterior ventral process and pit (with this position being diagnostic of yunnanolepids in particular).
• An intact and exquisitely preserved specimen demonstrates that the living animal had pelvic fins and a pelvic girdle, thus proving that antiarchs had, primitively at least, pelvic girdles, and or inherited them from a common ancestor of both placoderms and other gnathostomes.
• Primitive features such as jaw ossifications, a palatoquadrate, and a Meckel's cartilage are present in the Asterolepis that are important features shared between antiarchs and other Gnathostomata.
• The first plate is tentatively considered homologous to the (large) first median dorsal plate of antiarchs, as well as an unattached neck plate in Entelognathus (where it is known as a postnuchal), Sigaspsis, and Eurycaraspis (where it is known as an extrascapular).
• The cladogram is taken from Bothriolepid antiarchs (Vertebrata, Placodermi) from the Devonian of the north-western part of the East European Platform.

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