PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Borealosuchus

Reptilia

Taxonomy

Borealosuchus was named by Brochu (1997).

It was assigned to Mesoeucrocodylia by Pol and Norell (2004); to Alligatoroidea by Martin and Buffetaut (2008); to Crocodylia by Brochu (1997), Brochu (2000), Wu et al. (2001), Osi et al. (2007), Burger (2007), Jouve et al. (2008), Puértolas et al. (2011), Brochu et al. (2012) and Farke et al. (2014); to Neosuchia by Zaher et al. (2006), Fiorelli and Calvo (2008), Nascimento and Zaher (2011) and Sertich and O'Connor (2014); and to Eusuchia by Martin et al. (2010), Bronzati et al. (2012), Rio and Mannion (2021) and Darlim et al. (2022).

Species

B. acutidentatus, B. formidabilis, B. griffithi, B. sternbergii, B. threeensis, B. wilsoni (syn. Diplocynodon stuckeri), Leidyosuchus riggsi

Synonyms

Leidyosuchus riggsi was named by Schmidt (1938). Its type specimen is F.M. No. P15582, a skull (skull with nearly complete palate and part of cranial table), and it is a 3D body fossil. Its type locality is Hell's Half Acre (Lower), which is in a Clarkforkian terrestrial horizon in the DeBeque Formation of Colorado.

It was considered a nomen dubium by Brochu (1997) and Brochu (2000).

Synonymy list

Year	Name and author
1938	Leidyosuchus riggsi Schmidt p. 318
1986	Leidyosuchus riggsi Lucas and Sullivan p. 36
1997	Borealosuchus Brochu
2000	Borealosuchus Brochu p. 181
2001	Borealosuchus Wu et al. p. 1691
2004	Borealosuchus Pol and Norell
2006	Borealosuchus Zaher et al.
2007	Borealosuchus Burger p. 144
2007	Borealosuchus Osi et al.
2008	Borealosuchus Fiorelli and Calvo
2008	Borealosuchus Jouve et al.
2008	Borealosuchus Martin and Buffetaut
2010	Borealosuchus Martin et al.
2011	Borealosuchus Nascimento and Zaher
2011	Borealosuchus Puértolas et al.
2012	Borealosuchus Brochu et al.
2012	Borealosuchus Bronzati et al.
2014	Borealosuchus Farke et al.
2014	Borealosuchus Sertich and O'Connor
2021	Borealosuchus Rio and Mannion
2022	Borealosuchus Darlim 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

Rank	Name	Author
subclass	Eureptilia	()
—	Romeriida
—	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
genus	Borealosuchus

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.

G. †Borealosuchus Brochu 1997

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†Borealosuchus acutidentatus Sternberg 1932

†Borealosuchus formidabilis Erickson 1976

†Borealosuchus griffithi Wu et al. 2001

†Borealosuchus sternbergii Gilmore 1910

†Borealosuchus threeensis Brochu et al. 2012

†Borealosuchus wilsoni Mook 1959

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Invalid names: Diplocynodon stuckeri Mook 1960 [synonym]

Invalid names: Leidyosuchus riggsi Schmidt 1938 [nomen dubium]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

marineuc

Locomotion:

actively mobilec

Diet:

carnivoresubo

Created:

2017-04-17 10:39:01

Modified:

2017-04-17 10:39:01

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

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

Age range: base of the Maastrichtian to the top of the Early/Lower Uintan or 72.10000 to 39.70000 Ma

Collections (124 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Campanian - Middle Campanian	83.5 - 70.6	USA (North Carolina)	B. sp. (128412) Crocodilidae indet., Leidyosuchus sp. (57918)
Middle Campanian	83.5 - 70.6	USA (South Carolina)	B. sp. (180790 201600)
Middle Campanian - Late/Upper Campanian	83.5 - 70.6	USA (South Carolina)	B. sp. (79363)
Late/Upper Campanian - Early/Lower Maastrichtian	83.5 - 66.0	USA (New Jersey)	B. sp. (221052)
Maastrichtian	72.1 - 66.0	USA (North Dakota)	B. sp. (231466) Leidyosuchus sternbergi (45113 45313)
Lancian	70.6 - 66.0	USA (North Dakota)	Leidyosuchus sternbergi (14610 14620 14621)
Lancian	70.6 - 66.0	USA (South Dakota)	Leidyosuchus sternbergi (14537 192251)
Lancian	70.6 - 66.0	USA (Wyoming)	Leidyosuchus sternbergi (14505 14514 14519 14527 14538 14557 14566 14570 14578 14579 14596 14601 14625 14643 14644)
Lancian	70.6 - 66.0	USA (Montana)	Leidyosuchus sternbergi (14533 14534 14535 14536 14546 14548 14549 14552 14559 14574 14582 14615 14639 14654)
Lancian	70.6 - 66.0	USA (Colorado)	Leidyosuchus sternbergi (14640)
Late/Upper Maastrichtian	70.6 - 66.0	USA (South Dakota)	B. sp. (224484) B. sternbergi (47034) Leidyosuchus sternbergi (45388 45390)
Late/Upper Maastrichtian	70.6 - 66.0	USA (South Carolina)	B. sp. (201612)
Late/Upper Maastrichtian	70.6 - 66.0	USA (Montana)	B. sp. (183109) Leidyosuchus sternbergi (13142 14674) Leidyosuchus sternbergii (11931 99881)
Late/Upper Maastrichtian	70.6 - 66.0	USA (Wyoming)	Leidyosuchus sternbergi (14585 57159 57166 57168) Leidyosuchus sternbergii (99864)
Late/Upper Maastrichtian	70.6 - 66.0	USA (North Dakota)	B. sp. (231464) Leidyosuchus sternbergi (45098 45099 45102 45109 45110 45111 45112 45114 45117 45118 45119 45120 45124 45128 45130 45134 45136 45137 45143 45144 45145 45299 45381 45382 45386)
Late/Upper Maastrichtian - Early/Lower Paleocene	70.6 - 61.7	USA (New Jersey)	Diplocynodon sp. (26819)
Puercan	66.0 - 63.3	USA (Montana)	Leidyosuchus canadensis (123518)
Puercan	66.0 - 63.3	USA (New Mexico)	Leidyosuchus acutidentatus (84549)
Puercan	66.0 - 63.3	Canada (Saskatchewan)	B. griffithi (230115) B. sternbergii (230116)
Danian	66.0 - 61.6	Canada (Saskatchewan)	Leidyosuchus acutidentatus (22924)
Danian	66.0 - 61.6	Canada (Alberta)	B. griffithi (25654)
Torrejonian	63.8 - 60.9	USA (Texas)	B. sp. (14970 76029)
Ti3	61.7 - 56.8	USA (Colorado)	B. sp. (99821)
Tiffanian	61.7 - 56.8	USA (North Dakota)	Leidyosuchus formidabilis (15000)
Tiffanian - Clarkforkian	61.7 - 54.9	USA (Wyoming)	Leidyosuchus formidabilis (15211)
Clarkforkian	56.2 - 54.9	USA (Wyoming)	Leidyosuchus formidabilis (15091 15098 15108 15132 15147 15152 15155 15157 15159 15173 15174 15176 15184 15190 15192)
Clarkforkian	56.2 - 54.9	USA (Colorado)	Leidyosuchus riggsi (15252)
Wasatchian	55.8 - 50.3	USA (Wyoming)	B. sp. (15458 59904 59906)
Early/Lower Eocene	55.8 - 48.6	USA (Wyoming)	Leidyosuchus wilsoni (36713)
Bridgerian	50.3 - 46.2	USA (Wyoming)	B. sp. (16264 16270 16272 16273 70266) Diplocynodon stuckeri (16253)
Early/Lower Uintan	46.2 - 39.7	USA (Texas)	B. sp. (16196)