Anniealexandria

Anniealexandria is an extinct genus of amphisbaenian lizard known by the type species Anniealexandria gansi from the earliest Eocene of Wyoming. Anniealexandria is the only known member of the family Bipedidae in the fossil record, which otherwise only includes the extant genus Bipes from Mexico. It was named in 2009 in honor of Annie Montague Alexander, founder of the University of California Museum of Paleontology. Remains of Anniealexandria are known only from a single fossil locality in the Bighorn Basin called Castle Gardens, but within the locality its fossils are common in the Willwood Formation, usually consisting of isolated jaw bones and vertebrae. Anniealexandria seems to have been a common component of a paleofauna that included fifteen other lizard species and existed in western North America during a period of global warming in the latest Paleocene and earliest Eocene.

No picture of Anniealexandria was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Anniealexandria, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
BipedidaePBDB
Diet
insectivorePBDB, for Amphisbaenia
Life habit
fossorialPBDB, for Amphisbaenia
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Amphisbaenia

Time the record covers

At most 8 million years on record.

Every occurrence read is dated to somewhere between 56 Mya and 48.07 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Paleocene — about 0 of 2 occurrencesEocene — about 2 of 2 occurrencesEocene56–56 Mya — about 0.0 occurrences56–56 Mya — about 0.1 occurrences56–55 Mya — about 0.1 occurrences55–55 Mya — about 0.1 occurrences55–55 Mya — about 0.1 occurrences55–54 Mya — about 0.1 occurrences54–54 Mya — about 0.1 occurrences54–54 Mya — about 0.1 occurrences54–54 Mya — about 0.1 occurrences54–53 Mya — about 0.1 occurrences53–53 Mya — about 0.1 occurrences53–53 Mya — about 0.1 occurrences53–52 Mya — about 0.1 occurrences52–52 Mya — about 0.1 occurrences52–52 Mya — about 0.1 occurrences52–51 Mya — about 0.1 occurrences51–51 Mya — about 0.1 occurrences51–51 Mya — about 0.0 occurrences51–51 Mya — about 0.0 occurrences51–50 Mya — about 0.0 occurrences50–50 Mya — about 0.0 occurrences50–50 Mya — about 0.0 occurrences50–49 Mya — about 0.0 occurrences49–49 Mya — about 0.0 occurrences49–49 Mya — about 0.0 occurrences49–48 Mya — about 0.0 occurrences48–48 Mya — about 0.0 occurrences48–48 Mya — about 0.0 occurrences56.5 Mya47.6 Mya

2 occurrences of Anniealexandria on record, most of them in the Eocene. 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

2 occurrences

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

2 formations

Lignites de Soissonais — 49.05°N, 4.00°EWillwood — 43.95°N, 107.57°W

Loading coastlines…

The named rock units Anniealexandria has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Anniealexandria and its relatives

Eocene

Where Anniealexandria and its relatives were recorded in the Eocene.

Found in the same rock

102 taxa

The Paleobiology Database records 2 sites for Anniealexandria, and this reads all 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

2 references

Each of the 2 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content0

No picture of Anniealexandria was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Anniealexandria, or no answer at all. This entry cannot say which.

No 3D scan of Anniealexandria was found in Sketchfab.

Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.

The description on this site

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 itBipedidae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Smith 2009