PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Thoracosaurus isorhynchus

Reptilia - Gavialidae

Taxonomy

Crocodilus isorhynchus was named by Pomel (1847). It is a 3D body fossil. Its type locality is Mont-Aimé, which is in a Maastrichtian terrestrial horizon in France.

It was recombined as Thoracosaurus isorhynchus by Swinton (1938); it was synonymized subjectively with Thoracosaurus macrorhynchus by Voiculescu-Holvad (2022).

Synonyms

Crocodilus macrorhynchus was named by de Blainville (1855). Its type specimen is MNHN, a skull, and it is a 3D body fossil. Its type locality is SW-Seite des St. Pietersberges, Horizont Mc [Maastrichter Tuffkreide], which is in a Maastrichtian marine chalk in the Maastrichter Tuffkreide Formation of the Netherlands.

It was recombined as Gavialis macrorhynchus by Gervais (1859); it was recombined as Thoracosaurus macrorhynchus by Leidy (1865), Troxell (1925), Perrier (1928), Brochu (2004), Puértolas et al. (2011); it was synonymized subjectively with Thoracosaurus isorhynchus by Swinton (1938), Brignon (2017).
Thoracosaurus scanicus was named by Troedsson (1924). It is a 3D body fossil. Its type locality is Limhamn Quarry Upper Middle Danian Horizons, which is in a Danian deep subtidal shelf grainstone in the København Limestone Formation of Sweden.

It was synonymized subjectively with Thoracosaurus macrorhynchus by Brochu (2004), Voiculescu-Holvad (2022).

Synonymy list

Year	Name and author
1835	Crocodilus macrorhynchus de Blainville
1847	Crocodilus isorhynchus Pomel
1855	Crocodilus macrorhynchus de Blainville
1859	Gavialis macrorhynchus Gervais
1865	Thoracosaurus macrorhynchus Leidy
1924	Thoracosaurus scanicus Troedsson
1925	Thoracosaurus macrorhynchus Troxell
1925	Thoracosaurus scanicus Troxell
1928	Thoracosaurus macrorhynchus Perrier p. 3089
1938	Thoracosaurus isorhynchus Swinton p. 32
2004	Thoracosaurus macrorhynchus Brochu p. 622
2011	Thoracosaurus macrorhynchus Puértolas et al.

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida

Rank	Name	Author
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
—	Pseudosuchia	(Zittel 1890)
—	Suchia	Krebs 1974
—	Paracrocodylomorpha
—	Loricata	(Merrem 1820)
—	Crocodylomorpha	()
—	Solidocrania
suborder	Crocodyliformes
—	Mesoeucrocodylia	Whetstone and Whybrow 1983
—	Neosuchia	Clark 1988
suborder	Eusuchia	Huxley 1875
—	Crocodylia	(Owen 1842)
superfamily	Gavialoidea	Brochu 1997
family	Gavialidae	Adams 1854
genus	Thoracosaurus	Leidy 1852
species	isorhynchus	(Pomel 1847)

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.

†Thoracosaurus isorhynchus Pomel 1847

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Invalid names: Thoracosaurus macrorhynchus de Blainville 1855 [objective synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

marineuc

Locomotion:

actively mobilec

Diet:

carnivoreuc

Created:

2009-01-03 20:38:59

Modified:

2009-01-03 22:38:59

Source: c = class, subp = subphylum, uc = unranked clade

References: Bush and Bambach 2015, Carroll 1988, Hendy et al. 2009, Benton 1983

Age range: base of the Maastrichtian to the top of the Danian or 72.20000 to 61.66000 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Maastrichtian	72.2 - 66.0	Netherlands	Thoracosaurus macrorhynchus (90778)
Maastrichtian	72.2 - 66.0	France	Thoracosaurus macrorhynchus, Thoracosaurus isorhynchus (type locality: 195628)
Danian	66.0 - 61.66	Sweden	Thoracosaurus scanicus (90576)