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Ichthyosaurus trigonodon

Reptilia - Ichthyosauridae

Taxonomy
Ichthyosaurus trigonodon was named by Theodori (1843) [Species appears to have been originally assigned to a different taxon, and perhaps recombined in this way by Lydekker (1889), but original generic assignment not clear in this work.].

It was recombined as Temnodontosaurus trigonodon by von Theodori (1843), Maisch and Matzke (2000), McGowan and Motani (2003), Maisch (2010), Martin et al. (2012) and Ji et al. (2016).

Synonymy list
YearName and author
1843Ichthyosaurus trigonodon Theodori p. 906
1843Temnodontosaurus trigonodon von Theodori
2000Temnodontosaurus trigonodon Maisch and Matzke pp. 71, 72
2003Temnodontosaurus trigonodon McGowan and Motani
2010Temnodontosaurus trigonodon Maisch
2012Temnodontosaurus trigonodon Martin et al.
2016Temnodontosaurus trigonodon Ji et al. p. 11

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
RankNameAuthor
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Ichthyosauromorpha
—Ichthyosauriformes
—Ichthyopterygia(Owen 1840)
—Eoichthyosauria
—Ichthyosauria(de Blainville 1835)
—Thunnosauria
familyIchthyosauridaeBonaparte 1841
genusIchthyosaurusKoenig 1818
speciestrigonodonTheodori 1843

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Ichthyosaurus trigonodon Theodori 1843
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Diagnosis
ReferenceDiagnosis
M. W. Maisch and A. T. Matzke 2000"Maxilla low, with straight suture to premaxilla, jugal and premaxilla in contact, vomer short, angular and surangular of normal proportions, quadtratojugal moderately high, does not reach postfrontal, snout very long and straight or slightly ventrally curved, teeth with two to four carinae in adults, most elements of first digit notched."