Definition, Meaning & Anagrams | English word ACTINOPTERYGIANS

Definitions of ACTINOPTERYGIANS

1. plural of actinopterygian.

Examples of Using ACTINOPTERYGIANS in a Sentence

• The formation has yielded specimens pertaining to calcareous nannoplankton, foraminifers, scaphopods, pelecypods, gastropods, cephalopods, ostracods, decapods, echinoids, elasmobranchs, and actinopterygians, with the addition of a femur, right dentary containing teeth and cervical vertebrae of a hadrosaur.
• The Irohalene Member is characterized by abundant vertebrate fauna remains and footprints including members of Dinosauromorpha, crocodilian-stem archosaurs, phytosaurs, lepidosauromorphs and archosauromorphs as well as actinopterygians and dipnoi.
• Andreolepis has been considered a primitive actinopterygian, partly based on scale characteristics and the presence of ganoine, a homologue to true enamel, which was thought to be limited to actinopterygians whereas true enamel is limited to sarcopterygians.
• Among the fish discovered are the actinopterygians Saurichthys and an undetermined representative, while among the sarcopterygians, numerous specimens of indeterminate coelacanthids are known.
• Pycnodonts from the Late Triassic Zorzino Limestone in Italy had short and stout jaws with big crushing teeth for eating hard-shelled prey, while other actinopterygians like saurichthyids and birgeriids mainly occupied top predator piscivorous niches.
• Similar to many Paleozoic and Mesozoic actinopterygians, their bodies are covered in rows of interlocking, rhomboidal ganoid scales that create an exceptionally protective, yet flexible armor around the fish.
• The many primitive features of Guiyu and other "psarolepids" have led palaeontologists to suggest that they were stem-group osteichthyans instead, lying outside the clade formed by actinopterygians and sarcopterygians.
• Initially classified as either a palaeonisciform (a now-paraphyletic group of basal actinopterygians) or the earliest stem-group neopterygian, it is now generally considered a stem-group actinopteran.
• Many bony fish have been recorded in this formation, with actinopterygians being quite diverse, including abundant small species as well as larger representatives like Saurichthys, though rarer sarcopterygian coelacanths were also present.
• Vertebrate fossils include fragmentary remains of actinistians (coelacanths) and actinopterygians (tentatively identified as belonging to Elonichthyidae), possible ichnofossils of acanthodians (Undichna insolentia), and numerous and well-preserved skulls and partial skeletons of mesosaurs (Stereosternum and Mesosaurus).
• Among the fish discovered are the actinopterygians Saurichthys and an undetermined representative, while among the sarcopterygians, numerous specimens of indeterminate coelacanthids are known.
• A new genus of Actinopterygians, Raynerius splendens, was named after Rayner in 2015 "for her contributions to palaeoichthyology, particularly those relating to actinopterygian neurocrania".
• It has been suggested that the intertemporal is homologous to the postorbital plate of placoderms and the dermosphenotic bone of actinopterygians (ray-finned fish).
• It is mostly known for its diverse entomofauna, composed of more than 150 species of different groups of insects, as well as its marine vertebrate fossils, including remains of sharks, actinopterygians and marine reptiles, along with terrestrial remains of dinosaurs, including the early thyreophoran Emausaurus and others not yet assigned to a definite genus.
• Alongside the ctenacanthiform, the quarry has also preserved the remains of "two hybodontiforms, two holocephalans, three actinopterygians, and a megalichthyoform sarcopterygian", as well as more than 31 distinct fish genera.
• Both formations represent lacustrine environment, Although Fangshankou Formation has so far produced only one other fish taxon (an acipenseriform genus, Eochondrosteus), the Hongyanjing Formation produced multiple taxa such as several thousand specimens of actinopterygians (including Beishanichthys, Plesiofuro, Boreosomus), other hybodontiform sharks which are evidenced by preserved narial and oral barbels,.

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