Traquairaspidiformes is an order of extinct heterostracan agnathan fish known from the Silurian and Early Devonian periods. Fossils are predominantly known from Late Silurian fluvial deposits from Wales and England: some species were also found in strata representing shallow water marine environment in Canada and North America.
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| - Traquairaspidiformes (pt)
- Traquairaspidiformes (en)
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| - Traquairaspidiformes is an order of extinct heterostracan agnathan fish known from the Silurian and Early Devonian periods. Fossils are predominantly known from Late Silurian fluvial deposits from Wales and England: some species were also found in strata representing shallow water marine environment in Canada and North America. (en)
- Traquairaspidiformes é uma ordem do extinto heterostracan agnathan peixe conhecido dos períodos Siluriano e Devoniano. É predominantemente conhecida a partir do período Siluriano atrasando fluviais depósitos de Gales e Inglaterra, algumas espécies também foram encontradas no ambiente marinho de águas rasas da América do Norte. A maioria das espécies de traquairaspids são colocados dentro do tipo gênero Traquairaspis; a maior parte dos outros géneros, tais como Phialaspis, Toombsaspis, e Yukonaspis, foram sinonimizadas em Traquairaspis. (pt)
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| - Reconstruction of T. cambelli (en)
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| - Traquairaspidiformes (en)
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| - * Phialaspididae
* Traquairaspididae
* ?Weigeltaspididae (en)
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| - * Traquairaspida (Stensiö 1958)
* Phialaspidiformes (Berg 1955) (en)
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| - Traquairaspidiformes is an order of extinct heterostracan agnathan fish known from the Silurian and Early Devonian periods. Fossils are predominantly known from Late Silurian fluvial deposits from Wales and England: some species were also found in strata representing shallow water marine environment in Canada and North America. The head-shield and body armor of most traquairaspids form an almond shape. Plates have a distinctive ornamentation of tubercles: this ornamentation is very similar to the plate ornamentation of the heterostracan Weigeltaspis. This similarity of ornamentation creates much confusion over the taxonomical placement of Weigeltaspis, in addition to confusion over whether or not an isolated plate is of Traquairaspis, or of Weigeltaspis. Intact specimens of Weigeltaspis suggest a living animal similar to psammosteids like Drepanaspis. The armor of Phialaspis symmondsi (once considered as species of Traquairaspis) is shaped like a jet plane or paper airplane, with pointed wing-like crests and a dorsal crest near the posterior end of the armor. The body of "Yukonaspis," Traquairaspis angusta, is greatly elongated, based on the holotype, a ventral plate. Most species of traquairaspids are placed within the type genus Traquairaspis; most of the other genera, such as Phialaspis, Toombsaspis, and "Yukonaspis," have been synonymized into Traquairaspis. Weigeltaspis is sometimes placed within Traquairaspidiformes on account of the plate ornamentation being almost identical to that of Traquairaspis. (en)
- Traquairaspidiformes é uma ordem do extinto heterostracan agnathan peixe conhecido dos períodos Siluriano e Devoniano. É predominantemente conhecida a partir do período Siluriano atrasando fluviais depósitos de Gales e Inglaterra, algumas espécies também foram encontradas no ambiente marinho de águas rasas da América do Norte. O cabeça-protetor e do corpo armadura de maioria traquairaspids formam uma forma de amêndoa. As placas têm uma ornamentação distinta de tubérculos; esta ornamentação é muito semelhante à placa de ornamentação dos heterostracon Weigeltaspis. Esta semelhança de ornamentação cria muita confusão sobre o seu posicionamento taxonômico de Weigeltaspis, além de confusão sobre se ou não uma placa isolada é de Traquairaspis, ou de Weigeltaspis. A armadura de T. symmondsi (syn. Phialaspis symmondsi) tem a forma de um avião a jato ou avião de papel, com cristas semelhantes a asas pontiagudas e uma crista dorsal perto da extremidade posterior da armadura. A maioria das espécies de traquairaspids são colocados dentro do tipo gênero Traquairaspis; a maior parte dos outros géneros, tais como Phialaspis, Toombsaspis, e Yukonaspis, foram sinonimizadas em Traquairaspis. (pt)
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| - * Phialaspidiformes (Berg 1955)
- * Traquairaspida (Stensiö 1958)
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