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Ichthyosaurus tenuirostris

Reptilia - Ichthyosauridae

Taxonomy
Ichthyosaurus tenuirostris was named by Conybeare (1822). It is a 3D body fossil.

It was recombined as Leptopterygius tenuirostris by Huene (1922), von Huene (1922), Delair (1960), Appleby (1979) and McGowan (1989); it was recombined as Leptonectes tenuirostris by Maisch and Matzke (2000), Maisch and Matzke (2003), McGowan and Motani (2003), Maisch (2010), Fischer et al. (2013) and Ji et al. (2016).

Synonyms
Synonymy list
YearName and author
1822Ichthyosaurus tenuirostris Conybeare
1822Ichthyosaurus tenuirostris Parkinson p. 300
1830Ichthyosaurus grandipes Sharpe p. 222
1834Ichthyosaurus chirostrongulostinus Hawkins p. 12 figs. Pl. XVI
1840Ichthyosaurus strongylostinus Hawkins p. 13 figs. Pl. XII-XVI
1840Ichthyosaurus tenuirostris Owen p. 117
1851Ichthyosaurus tenuirostris Mantell p. 362
1858Ichthyosaurus tenuirostris Buckland p. 168
1859Ichthyosaurus tenuirostris Owen p. 149
1861Ichthyosaurus tenuirostris Owen p. 223
1889Ichthyosaurus tenuirostris Lydekker p. 83 figs. 25, 26
1922Leptopterygius tenuirostris Huene
1922Leptopterygius tenuirostris von Huene p. 1
1934Ichthyosaurus tenuirostris Swinton fig. VIII
1960Leptopterygius tenuirostris Delair p. 70
1979Leptopterygius tenuirostris Appleby p. 943
1989Leptopterygius tenuirostris McGowan p. 413
2000Leptonectes tenuirostris Maisch and Matzke p. 72
2003Leptonectes tenuirostris Maisch and Matzke pp. 116-124 figs. 1-4
2003Leptonectes tenuirostris McGowan and Motani
2010Leptonectes tenuirostris Maisch
2013Leptonectes tenuirostris Fischer et al.
2016Leptonectes tenuirostris Ji et al. p. 12

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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
speciestenuirostris

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 tenuirostris Conybeare 1822
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Invalid names: Ichthyosaurus chirostrongulostinus Hawkins 1834 [synonym], Ichthyosaurus grandipes Sharpe 1830 [synonym]
Diagnosis
ReferenceDiagnosis
W. D. Conybeare 1822In this the teeth are much more slender than in the preceding species. But the species is best marked by the extreme length and thinness of the snout, in which points it very strikingly exceeds all the other ichthyosauri
R. M. Appleby 1979"As set out by McGowan (1974, p. 25) with the additional facts that the number of primary fingers may be three or four and that the coracoid shows all gradations in the species from longipinnatoid to latipinnatoid."
M. W. Maisch and A. T. Matzke 2000"Small species never exceeding 4 m in length, snout very long."
M. W. Maisch and A. T. Matzke 2003Medium-sized ichthyosaur, total length around 4,000 mm at maximum; skull length not exceeding 1,000 mm; snout very long and slender, orbital ratio of skull less than 0.25; snout ratio exceeding 0.70; prenarial ratio larger than 0.56; sclerotic ratio much larger than 0.34; snout without or with only rather inconspicuous overbite; fenestra supratemporalis of rounded shape, about one third the size of orbita; jugal with narrow, dorsoventrally depressed ramus suborbitalis and considerably wider ramus postorbitalis; forefin relatively wide with four well-developed primary digits; humerus with strongly constricted shaft and well-developed leading edge facet; foramen interosseum remaining usually open between radius and ulna; radius and tibia notched; other fin elements usually unnotched; phalanges discoidal, large, rather widely spaced distally; femur with slender shaft, expanded distally.