Anisopyge
Anisopyge is an extinct genus of trilobite belonging to the order Proetida and family Phillipsiidae. Specimens have been found in Permian beds in North and Central America.

Not credited. Publication authored by George Girty. · Public Domain · 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- Sits inside
- DitomopyginaePBDB
- Diet
- deposit feederPBDB, for Proetida
- Life habit
- low-level epifaunalPBDB, for Trilobita
- Motility
- fast-movingPBDB, for Trilobita
- Vision
- well-developedPBDB, for Phillipsiidae
- Environment
- marinePBDB, for Trilobita
Time the record covers
At least 19 million years on record.
The record covers at least 283.3 Mya to 264.28 Mya. No occurrence read is dated outside 290.1 Mya to 259.857 Mya.
46 occurrences of Anisopyge on record, most of them in the Permian. 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
46 occurrences- Permian100%
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
17 formations
- Capitan Formation10
- Word Formation7
- Kaibab Formation6
- Road Canyon Formation5
- Loray Formation3
- Bell Canyon Formation3
Loading coastlines…
The named rock units Anisopyge has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Anisopyge and its relatives
PermianWhere Anisopyge and its relatives were recorded in the Permian.
Found in the same rock
894 taxa- Hustedia14 sites
- Composita13 sites
- Derbyia12 sites
- Dielasma12 sites
- Paraspiriferina billingsi12 sites
- Reticulariina11 sites
- Cyclacantharia kingorum10 sites
- Girtypecten sublaqueatus10 sites
- Eocamptonectes papillatus9 sites
- Naticopsis9 sites
- Anteridocus swallovianus8 sites
- Cooperina inexpectata8 sites
- Echinosteges tuberculatus8 sites
- Tautosia shumardiana8 sites
- Annuliconcha dentata7 sites
- Astartella7 sites
- Astegosia subquadrata7 sites
- Dyoros (Dyoros) extensus7 sites
- Grammatodon (Cosmetodon) politus7 sites
- Liosotella wordensis7 sites
- Paucispinifera latidorsata7 sites
- Permophorus7 sites
- Pernopecten yini7 sites
- Pseudomonotis7 sites
The Paleobiology Database records 44 sites for Anisopyge, 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
11 references- Permian trilobites from west Texas23
- Early Permian fossil communities in northeastern Nevada and northwestern Utah5
- The Guadalupian fauna5
- Paleoecology of trilobites of the Kaibab limestone (Permian) in Arizona, Utah, and Nevada4
- Paleontology, Taphonomy, and Paleoecology of the Palmarito Formation (Permian of Venezuela)2
- Paleoecology of three faunules in the Permian Kaibab Formation at Flagstaff, Arizona2
- Presencia de Anisopyge perannulata y Ditomopyge cf. D. whitei (Trilobita, Proetidae) en el Pérmico (Guadalupiano medio) de la Formación Las Delicias, Coahuila, norte de México1
- Evolution of the Permian trilobite Anisopyge1
- Permian trilobite species from central Wyoming and west Texas1
- Paleontology of the Manzano group1
- Notice of new fossils from the Permian strata of New Mexico and Texas, collected by Dr. George G. Shumard, geologist of the United States Government expedition for obtaining water by means of artesian wells along the 32nd parallel, under the direction of Capt John Pope, US Corps Topographic Engineers1
Each of the 46 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. 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 Anisopyge
- Source
- Wikipedia/Commons
- Credit
- Not credited. Publication authored by George Girty.
- Licence
- Public Domain
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- Source
- Wikipedia, “Anisopyge”
- 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 itDitomopyginae through timeFormations of the PermianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Girty 1909)