Sphenosteges

Yale Peabody Museum · CC0 · via GBIF. 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
- EchinosteginaePBDB
- Diet
- suspension feederPBDB, for Strophalosiidina
- Life habit
- low-level epifaunalPBDB, for Strophalosiidina
- Motility
- stationary, attachedPBDB, for Strophalosiidina
- Vision
- blindPBDB, for Strophomenata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At least 7 million years on record.
The record covers at least 266.9 Mya to 259.857 Mya. No occurrence read is dated outside 298.9 Mya to 251.902 Mya.
29 occurrences of Sphenosteges 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
29 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
5 formations
- Gerster Formation · Park City Group16
- Park City Formation8
- Neoschwagerina Beds Formation2
- Shedhorn Formation1
- Ranger Canyon Formation1
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The named rock units Sphenosteges has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Sphenosteges and its relatives
PermianWhere Sphenosteges and its relatives were recorded in the Permian.
Found in the same rock
167 taxa- Xestotrema pulchrum20 sites
- Crinoidea14 sites
- Ctenalosia fixata14 sites
- Echinauris subhorrida14 sites
- Bryozoa13 sites
- Composita mira12 sites
- Dielasma phosphoriensis12 sites
- Grandaurispina10 sites
- Hustedia elongata10 sites
- Derbyia sulca9 sites
- Aviculopecten8 sites
- Cleiothyridina7 sites
- Fenestrata7 sites
- Heteropecten vanvleeti6 sites
- Orbiculoidea6 sites
- Bathymyonia nevadensis5 sites
- Plectelasma5 sites
- Rugosa5 sites
- Trepostomata5 sites
- Composita4 sites
- Cyrtorostra varicostata4 sites
- Hemiptychina quadricostata4 sites
- Odontospirifer4 sites
- Phrenophoria4 sites
The Paleobiology Database records 28 sites for Sphenosteges, 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
6 references- The biostratigraphy and paleoecology of the Gerster Limestone (Upper Permian) in Nevada and Utah16
- Biostratigraphy of the Phosphoria, Park City, and Shedhorn Formations; Geology of Permian Rocks in the Western Phosphate Field6
- Paleontology and stratigraphy of the Phosphoria Formation3
- Middle Permian brachiopods from the Velebit Mts. (Croatia, Yogoslavia)2
- Biostratigraphy and faunas of the Permian Ishbel Group, Canadian Rocky Mountains1
- Geology and mineral deposits of southeastern Alaska1
Each of the 29 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 Sphenosteges
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Sphenosteges 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itEchinosteginae through timeFormations of the PermianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Muir-Wood and Cooper 1960