Saniwa

Saniwa ensidens
Saniwa is an extinct genus of varanid lizard that lived about 48 million years ago during the Eocene epoch.wikipedia
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Varanidae

varanidvaranidsmonitors
Saniwa is an extinct genus of varanid lizard that lived about 48 million years ago during the Eocene epoch.

Parietal eye

pineal eyethird eyepineal foramen
A study in 2018 by scientists from the Senckenberg Research Institute and Yale University found Saniwa had two parietal eyes, one that developed from the pineal gland and the other from the parapineal gland.
Saniwa, an extinct varanid lizard, had two parietal eyes, one that developed from the pineal gland and the other from the parapineal gland.

Bridger Formation

BridgerBridger Basin
It is known from well-preserved fossils found in the Bridger and Green River Formations of Wyoming, and evidence indicates Saniwa also lived in Europe.

Genus

generageneric namegeneric
Saniwa is an extinct genus of varanid lizard that lived about 48 million years ago during the Eocene epoch.

Lizard

lizardsLacertiliaLacertilia indet.
Saniwa is an extinct genus of varanid lizard that lived about 48 million years ago during the Eocene epoch.

Eocene

Late EoceneMiddle EoceneEocene Epoch
Saniwa is an extinct genus of varanid lizard that lived about 48 million years ago during the Eocene epoch.

Fossil

fossilsfossil recordfossilized
It is known from well-preserved fossils found in the Bridger and Green River Formations of Wyoming, and evidence indicates Saniwa also lived in Europe.

Green River Formation

Green RiverFossil Lake
It is known from well-preserved fossils found in the Bridger and Green River Formations of Wyoming, and evidence indicates Saniwa also lived in Europe.

Wyoming

WYState of WyomingWyoming, USA
It is known from well-preserved fossils found in the Bridger and Green River Formations of Wyoming, and evidence indicates Saniwa also lived in Europe.

Europe

EuropeanEUEuropean continent
It is known from well-preserved fossils found in the Bridger and Green River Formations of Wyoming, and evidence indicates Saniwa also lived in Europe.

North America

NorthNorth AmericanNA
ensidens'' was described in 1870 as the first fossil lizard known from North America.

Species

specificspecific epithetspecific name
Several other species have since been added, but their validity is uncertain.

Monitor lizard

Varanusmonitor lizardsmonitor
It is a close relative of Varanus, the genus that includes monitor lizards.

Neontology

extantlivingextant species
Although similar in appearance to extant monitor lizards, Saniwa had many primitive traits, including teeth on its palate, a jugal bone beneath the eye that extended farther forward, and a suture between the frontal and parietal bones that was straight rather than curved.

Palate

palatalroof of the mouthpalatine
Although similar in appearance to extant monitor lizards, Saniwa had many primitive traits, including teeth on its palate, a jugal bone beneath the eye that extended farther forward, and a suture between the frontal and parietal bones that was straight rather than curved.

Jugal bone

jugaljugalscheekbone
Although similar in appearance to extant monitor lizards, Saniwa had many primitive traits, including teeth on its palate, a jugal bone beneath the eye that extended farther forward, and a suture between the frontal and parietal bones that was straight rather than curved.

Frontal bone

frontalfrontalsfrontal bones
Although similar in appearance to extant monitor lizards, Saniwa had many primitive traits, including teeth on its palate, a jugal bone beneath the eye that extended farther forward, and a suture between the frontal and parietal bones that was straight rather than curved.

Parietal bone

parietalparietalsparietal bones
Although similar in appearance to extant monitor lizards, Saniwa had many primitive traits, including teeth on its palate, a jugal bone beneath the eye that extended farther forward, and a suture between the frontal and parietal bones that was straight rather than curved.

Senckenberg Nature Research Society

Senckenberg Gesellschaft für NaturforschungSenckenberg Research InstituteSenckenbergische Naturforschende Gesellschaft
A study in 2018 by scientists from the Senckenberg Research Institute and Yale University found Saniwa had two parietal eyes, one that developed from the pineal gland and the other from the parapineal gland.

Yale University

YaleYale CollegeUniversity of Yale
A study in 2018 by scientists from the Senckenberg Research Institute and Yale University found Saniwa had two parietal eyes, one that developed from the pineal gland and the other from the parapineal gland.

Pineal gland

pineal foramenpinealpineal body
A study in 2018 by scientists from the Senckenberg Research Institute and Yale University found Saniwa had two parietal eyes, one that developed from the pineal gland and the other from the parapineal gland.

Tuatara

SphenodonBrothers Island tuataraSphenodon punctatus
The parietal eye is a light-sensitive structure present in the tuatara, most lizards, frogs, salamanders, certain bony fish, sharks and lampreys, a group of jawless fish.

Frog

frogsAnuraanuran
The parietal eye is a light-sensitive structure present in the tuatara, most lizards, frogs, salamanders, certain bony fish, sharks and lampreys, a group of jawless fish.

Salamander

salamandersUrodelaurodele amphibians
The parietal eye is a light-sensitive structure present in the tuatara, most lizards, frogs, salamanders, certain bony fish, sharks and lampreys, a group of jawless fish.