PBDB Taxon

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

Saniwa

Osteichthyes

Taxonomy

Saniwa was named by Leidy (1870). It is not extant. Its type is Saniwa ensidens. It is the type genus of Saniwinae.

It was assigned to Lacertilia by Leidy (1873); to Anguidae by Hay (1902); to Megalaninae by Nopcsa (1928); to Varanidae by Hecht (1959), Estes (1983), Carroll (1988), Alifanov (1993), Clos (1995), Smith (2006); and to Saniwinae by Hay (1930), McDowell and Bogert (1954), Brattstrom (1955), Stritzke (1983), Rieppel and Grande (2007).

Species

S. edura, S. ensidens (syn. Thinosaurus crassus, Thinosaurus grandis, S. brooksi, S. major, Thinosaurus paucidens, Thinosaurus agilis, Thinosaurus leptodus) (type species), S. orsmaelensis

Synonyms

Thinosaurus was named by Marsh (1872). Its type is Tinosaurus stenodon.

It was misspelled as Tinosaurus by Estes (1983); it was synonymized subjectively with Saniwa by Gilmore (1922), Hay (1930), Gilmore (1943), Hecht (1959), Carroll (1988), Rieppel and Grande (2007), Smith et al. (2018).

It was assigned to Lacertilia by Cope (1873); to Varanidae by Zittel (1890), Hoffmann (1890), Boulenger (1891), Hay (1902); and to Agamidae by Estes (1983).

Synonymy list

Year	Name and author
1870	Saniwa Leidy p. 124
1872	Thinosaurus Marsh p. 299
1873	Thinosaurus Cope p. 632
1873	Saniva Leidy p. 181–182
1890	Thinosaurus Hoffmann
1890	Thinosaurus Zittel
1891	Thinosaurus Boulenger
1902	Saniwa Hay p. 475
1902	Thinosaurus Hay p. 476
1928	Saniva Nopcsa p. 177
1930	Saniwa Hay p. 251
1954	Saniwa McDowell and Bogert p. 132
1955	Saniwa Brattstrom p. 145
1959	Saniwa Hecht p. 135
1983	Saniwa Estes
1983	Tinosaurus Estes
1983	Saniwa Stritzke
1988	Saniwa Carroll
1993	Saniwa Alifanov p. 10
1995	Saniwa Clos p. 263
2006	Saniwa Smith p. 6
2007	Saniwa Rieppel and Grande p. 644

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
class	Osteichthyes
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha

Rank	Name	Author
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
—	Squamata	()
—	Anguimorpha	(Fürbringer 1900)
—	Anguiformes	(Bonaparte 1831)
infraorder	Platynota	Baur 1890
superfamily	Varanoidea	Gray 1827
subfamily	Saniwinae	Camp 1923
genus	Saniwa

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. †Saniwa Leidy 1870

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†Saniwa edura Smith 2006

†Saniwa ensidens Leidy 1870

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Invalid names: Saniwa brooksi Brattstrom 1955 [synonym], Saniwa major Leidy 1873 [synonym], Thinosaurus agilis Marsh 1872 [synonym], Thinosaurus crassus Marsh 1872 [synonym], Thinosaurus grandis Marsh 1872 [synonym], Thinosaurus leptodus Marsh 1872 [synonym], Thinosaurus paucidens Marsh 1872 [synonym]

†Saniwa orsmaelensis Dollo 1923

Invalid names: Thinosaurus Marsh 1872 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialg

Locomotion:

actively mobilec

Life habit:

planktonicp

Diet:

carnivoreg

Reproduction:

oviparoussuperf

Created:

2005-09-16 14:07:29

Modified:

2005-09-16 16:07:29

Source: g = genus, superf = superfamily, c = class, subp = subphylum, p = phylum

References: Hendy et al. 2009, Pianka and Vitt 2003, Carroll 1988, Gilmore 1928, Kiessling 2004, Bambach et al. 2007

Age range: base of the Torrejonian to the top of the Orellan or 63.40000 to 31.80000 Ma

Collections (64 total)

Time interval	Ma	Country or state	Original ID and collection number
Torrejonian	63.4 - 60.9	USA (Wyoming)	S. sp., Palaeosaniwa canadensis (14886)
Lysitean - Lostcabinian	56.0 - 51.1	USA (Wyoming)	S. sp. A (15451)
Wasatchian	56.0 - 51.1	USA (Wyoming)	S. ensidens (15853 85026 179977) S. sp. (15534 15904 15908 15910) S. sp. B (181313) S. sp. CG-1, S. sp. CG-2 (15458)
Wasatchian	56.0 - 51.1	USA (North Dakota)	S. ensidens (15895)
Wasatchian	56.0 - 51.1	Mexico (Baja California)	S. sp. (15671)
Wasatchian	56.0 - 51.1	USA (New Mexico)	S. ensidens (186899 186901) S. sp. (15453 186898 186902 186903 186904 186905)
MP 8 + 9	56.0 - 48.07	France (Nord-Pas-de-Calais-Picardie)	Saniwa indet. (179143)
MP 8 + 9	56.0 - 48.07	France (Picardie)	S. sp., S. orsmaelensis (84997)
Ypresian	56.0 - 48.07	Kyrgyzstan (Osh)	S. sp. (28490)
Ypresian	56.0 - 48.07	France (Champagne-Ardenne)	Saniwa indet. (73387)
Ypresian	56.0 - 48.07	France (Oise)	S. orsmaelensis (68174)
Ypresian	56.0 - 48.07	France (Marne)	Saniwa indet. (35540) S. orsmaelensis (35533)
Ypresian	56.0 - 48.07	Belgium (Brabant)	S. orsmaelensis (35531)
Bridgerian	51.1 - 45.9	USA (Colorado)	S. sp. (179980)
Bridgerian	51.1 - 45.9	USA (Utah)	S. sp. (16396)
Bridgerian	51.1 - 45.9	USA (Wyoming)	S. crassa (16211 16234 16278) S. ensidens (15837 16136 16210 27269 99835) S. grandis (16431) S. major (106325) S. sp. (16296) S. sp., Thinosaurus stenodon (16244) Thinosaurus paucidens, Thinosaurus leptodus, Thinosaurus grandis (16228) Thinosaurus stenodon (16433)
Middle Eocene	48.07 - 37.71	USA (Wyoming)	S. paucidens (118469) Thinosaurus crassus, Thinosaurus agilis (81455)
Early/Lower Uintan	45.9 - 39.7	USA (Utah)	S. crassa (179979)
Early/Lower Uintan	45.9 - 39.7	USA (California)	S. brooksi (16665 16702 16705 16706)
Early/Lower Uintan	45.9 - 39.7	USA (Colorado)	S. sp. (16623)
Uintan	45.9 - 39.7	USA (Utah)	S. crassa (16606) S. ensidens (16654) S. sp. (222799) Thinosaurus paucidens (179978)
Uintan	45.9 - 39.7	USA (California)	S. brooksi (16786 16791)
Bartonian	41.03 - 37.71	France (Languedoc-Roussillon Region)	Saniwa indet. (31736)
Priabonian	37.71 - 33.9	France (Quercy, Midi-Pyrenees Region)	Saniwa indet. (12854)
Late/Upper Eocene - Early/Lower Miocene	37.71 - 15.98	France (Languedoc-Roussillon-Midi-Pyrénées)	S. sp. (179194)
Chadronian	37.0 - 33.9	USA (North Dakota)	S. edura (16991)
Orellan	33.9 - 31.8	USA (Nebraska)	Saniwa indet. (179967)