Sphenotus

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
- GrammysiidaePBDB
- Diet
- suspension feederPBDB, for Bivalvia
- Life habit
- infaunalPBDB, for Bivalvia
- Motility
- facultatively mobilePBDB, for Bivalvia
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 178 million years on record.
The record covers at least 443.1 Mya to 264.28 Mya. No occurrence read is dated outside 445.2 Mya to 259.857 Mya.
158 occurrences of Sphenotus on record, most of them in the Devonian. 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
158 occurrences- Ordovician1%
- Devonian72%
- Carboniferous25%
- Permian1%
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
52 formations
- Triangle Formation · Sonyea Group22
- Skaneateles Formation · Hamilton Group18
- Moscow Formation · Hamilton Group11
- Ludlowville Formation · Hamilton Group6
- Glen Aubrey Formation · Sonyea Group6
- Fayetteville Formation6
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The named rock units Sphenotus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 28 further formations hold fewer occurrences each and are not listed. 14 occurrences have no formation on record, which is common for older literature.
Sphenotus and its relatives
DevonianWhere Sphenotus and its relatives were recorded in the Devonian.
Found in the same rock
1,140 taxa- Crinoidea46 sites
- Leiorhynchus34 sites
- Modiomorpha33 sites
- Cypricardella28 sites
- Mucrospirifer mucronatus28 sites
- Nuculoidea28 sites
- Goniophora24 sites
- Grammysia24 sites
- Tentaculites24 sites
- Nuculites oblongatus22 sites
- Palaeoneilo22 sites
- Camarotoechia21 sites
- Lingula21 sites
- Mucrospirifer21 sites
- Palaeoneilo constricta21 sites
- Edmondia20 sites
- Leptodesma19 sites
- Nuculites19 sites
- Paracyclas19 sites
- Tropidoleptus carinatus19 sites
- Calvibembexia sulcomarginata18 sites
- Devonochonetes scitulus18 sites
- Aviculopecten17 sites
- Productella17 sites
The Paleobiology Database records 138 sites for Sphenotus, 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
45 references- Quantitative community analysis: Recurrent group and cluster techniques applied to the fauna of the Upper Devonian Sonyea Group, New York28
- Quantitative Analysis of Paleocommunities in the Lower Part of the Hamilton Group near Cazenovia, New York20
- The Malvinokaffric realm in the Devonian of Brazil10
- Classification and distribution of the Hamilton and Chemung series of central and eastern New York, Part 29
- Bivalves (Mollusca) from the Mauch Chunk Group (Mississippian, Chesterian) of northern West Virginia and southwestern Pennsylvania6
- Revision of some of Girty's invertebrate fossils from the Fayetteville Shale (Mississippian) of Arkansas and Oklahoma - Pelecypods6
- Mississippian (Chesterian) bivalves from the Pennsylvanian stratotype area in West Virginia and Virginia5
- Tong-Dzuy et al., 19885
- Geology and mineral deposits of southeastern Alaska5
- Work with Thayer collections, Yale Peabody Accession 7112, published, in part, "New perspectives on transitions between ecological-evolutionary subunits in the "type interval" for coordinated stasis", James J Zambito IV, Carlton E Brett, Gordon C Baird, Sarah E Kolbe, Arnold I Miller; Paleobiology4
- Lower and Middle Devonian marine deposits of the Soviet arctic and the correlation with arctic Canada4
- Mississippian stratigraphy of the Diamond Peak Area, Eureka County, Nevada4
Each of the 158 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. 33 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 Sphenotus
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Sphenotus 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itGrammysiidae through timeFormations of the DevonianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Hall 1884