Lacertilia
Lizard is the common name used for all squamate reptiles that are not snakes, encompassing over 7,000 species. They have a cosmopolitan distribution, ranging across all continents except Antarctica, as well as most oceanic island chains. Extant lizard species vary in size from the 13.5 mm (0.53 in) nano-chameleon and the 14–18 mm (0.55–0.71 in) Jaragua dwarf gecko to the 3-meter-long Komodo dragon.

Basile Morin · CC BY-SA 4.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Also called
- lizardPBDB
- Sits inside
- SquamataPBDB
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Amniota
Time the record covers
At least 192 million years on record.
The record covers at least 192.9 Mya to 11.7 ka. No occurrence read is dated outside 227.3 Mya to 0 Mya.
319 occurrences of Lacertilia on record, most of them in the Late Cretaceous. The Paleobiology Database records this as a living group. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
319 occurrences- Late Triassicunder 1%
- Early Jurassicunder 1%
- Middle Jurassic3%
- Late Jurassic4%
- Early Cretaceous9%
- Late Cretaceous33%
- Paleocene3%
- Eocene22%
- Oligocene3%
- Miocene9%
- Pliocene5%
- Pleistocene7%
- Holocene1%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
109 formations
- Willwood Formation48
- Dinosaur Park Formation · Belly River Group15
- Morrison Formation9
- Baruungoyot Formation7
- Djangura Formation7
- Pui Beds Formation6
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The named rock units Lacertilia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 85 further formations hold fewer occurrences each and are not listed. 56 occurrences have no formation on record, which is common for older literature.
Lacertilia and its relatives
Late CretaceousWhere Lacertilia and its relatives were recorded in the Late Cretaceous.
Found in the same rock
2,765 taxa- Anura68 sites
- Crocodylia58 sites
- Osteichthyes56 sites
- Theropoda53 sites
- Lepisosteus52 sites
- Mammalia50 sites
- Testudines48 sites
- Diacodexis metsiacus41 sites
- Hadrosauridae34 sites
- Aves31 sites
- Ankylosauria29 sites
- Homogalax protapirinus26 sites
- Multituberculata26 sites
- Esthonyx bisulcatus25 sites
- Hyopsodus loomisi25 sites
- Teleostei25 sites
- Phenacodus vortmani24 sites
- Allognathosuchus23 sites
- Coryphodon eocaenus23 sites
- Dromaeosauridae22 sites
- Haplomylus speirianus22 sites
- Cantius mckennai21 sites
- Didymictis protenus21 sites
- Gastropoda21 sites
The Paleobiology Database records 284 sites for Lacertilia, and this reads 240 of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
174 references- Stratigraphy and mammalian paleontology of the McCullough Peaks, northern Bighorn Basin, Wyoming: Implications for biochronology, basin development, and community reorganization across the Paleocene-Eocene boundary46
- Paleontology of the Judith River Formation (Campanian) of Dinosaur National Park, Alberta, Canada: evidence from vertebrate microfossil locality19
- Summary of known occurrences of terrestrial vertebrates from Eocene strata of southern California8
- Ammonites, Microfauna, and Palynomorphs from the Lower Part of the Upper Bajocian Parkinsoni Zone of the Basin of the Bolshoi Zelenchuk River, Northern Caucasus7
- Squamate reptiles from the Lower Miocene of the Sperrgebiet, Namibia6
- Herpetofaunas from the Upper Paleocene and Lower Eocene of Morocco6
- Paleoecological analysis of the vertebrate fauna of the Morrison Formation (Upper Jurassic), Rocky Mountain region, U.S.A.6
- New lissamphibians and squamates from the Maastrichtian of Hateg Basin, Romania5
- Biostratigraphy and biochronology of the Monte Hermoso Formation (early Pliocene) at its type locality, Buenos Aires Province, Argentina4
- Late Quaternary terrestrial vertebrates from Palawan Islad, Philippines4
- Squamates (Reptilia) from the Upper Cretaceous of Lano (Basque Country, Spain)4
- Early Cretaceous (Comanchean) vertebrates of central Texas4
Each of the 319 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 162 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Lacertilia
- Source
- Wikipedia/Commons
- Credit
- Basile Morin
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Lacertilia was found in MorphoSource and Sketchfab.
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Lizard”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itSquamata through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Owen 1842)