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The earliest recorded acanthodian, Fanjingshania renovata, [19] comes from the lower Silurian of China and it is also the oldest jawed vertebrate with known anatomical features. [19] Coeval to Fanjingshania is the tooth-based acanthodian species Qianodus duplicis [20] that represents the oldest unequivocal toothed vertebrate. Osteichthyes
The tooth whorls of Qianodus represent the oldest unequivocal remains of a toothed vertebrate, predating previously recorded occurrences [5] by about 14 million years. The specimens attributed to the genus come from limestone conglomerate beds of the Rongxi Formation exposed near the village of Leijiatun, Guizhou Province, China.
The coelacanth's auditory reception is mediated by its inner ear, which is very similar to that of tetrapods and is classified as being a basilar papilla. [35] Coelacanths are a part of the clade Sarcopterygii, or the lobe-finned fishes. They share membership in this clade with lungfish and tetrapods.
They are noted for their denticle whorls - oropharyngeal denticles that lined their branchial bars - which are thought to be homologous with other, later gnathostome teeth. In this sense, Loganellia may possess the earliest known dental structures related to modern teeth, and would have evolved in the throat, rather than through dermal ...
The teeth of Ardipithecus ramidus in particular showed that the species was probably an omnivore. The upper canines are less sharp than a chimpanzee’s, possibly due to them being smaller in general. [6] The canines in chimpanzees can be particularly sharp as they are often shaped through use and wear against the lower teeth. [6]
Palaeognathae (/ ˌ p æ l i ˈ ɒ ɡ n ə θ i /; from Ancient Greek παλαιός (palaiós) ' old ' and γνάθος (gnáthos) ' jaw ') is an infraclass [1] of birds, called paleognaths or palaeognaths, within the class Aves of the clade Archosauria.
A Palmer oak in Jurupa Valley is estimated to be 13,000 to 18,000 years old. The plant, which looks like a sprawling, dark green shrub, is now at the center of a development battle.
Glyptodon (lit. ' grooved or carved tooth '; from Ancient Greek γλυπτός (gluptós) ' sculptured ' and ὀδοντ-, ὀδούς (odont-, odoús) ' tooth ') [1] is a genus of glyptodont, an extinct group of large, herbivorous armadillos, that lived from the Pliocene, around 3.2 million years ago, [2] to the early Holocene, around 11,000 years ago, in South America.