Orthoceratidae
Orthoceratidae, from Ancient Greek ὀρθός (orthós), meaning "straight", and κέρας (kéras), meaning "horn", is an extinct family of actively mobile carnivorous cephalopods, subclass Nautiloidea, that lived in what would be North America, Europe, Asia, Africa, and Australia from the Ordovician through Triassic from 490—203.7 mya, existing for approximately 286.4 million years.

Nobu Tamura ( http://spinops.blogspot.com ) · CC BY 3.0 · 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- Sits inside
- OrthoceridaPBDB
- Diet
- carnivorePBDB, for Orthocerida
- Life habit
- nektonicPBDB, for Orthocerida
- Motility
- actively mobilePBDB, for Orthocerida
- Vision
- well-developedPBDB, for Cephalopoda
- Environment
- marinePBDB, for Orthocerida
Time the record covers
At least 254 million years on record.
The record covers at least 481.7 Mya to 227.3 Mya. No occurrence read is dated outside 483.4 Mya to 205.7 Mya.
1,118 occurrences of Orthoceratidae on record, most of them in the Ordovician. 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
1,118 occurrences- Ordovician43%
- Silurian22%
- Devonian22%
- Carboniferous5%
- Permian4%
- Early Triassicunder 1%
- Middle Triassic1%
- Late Triassic2%
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
329 formations
- Baota Formation56
- Overton Formation34
- Fluminimaggiore Formation34
- Skaneateles Formation27
- Dunleith Formation · Galena Group21
- Geneseo Formation · Genesee Group19
Loading coastlines…
The named rock units Orthoceratidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 305 further formations hold fewer occurrences each and are not listed. 246 occurrences have no formation on record, which is common for older literature.
Orthoceratidae and its relatives
OrdovicianWhere Orthoceratidae and its relatives were recorded in the Ordovician.
Found in the same rock
2,045 taxa- Orthoceras121 sites
- Michelinoceras114 sites
- Nuculites37 sites
- Crinoidea36 sites
- Sinoceras35 sites
- Lingula33 sites
- Craniops29 sites
- Bryozoa28 sites
- Rhipidomella27 sites
- Palaeoneilo26 sites
- Chonetoidea25 sites
- Hyolithes25 sites
- Kionoceras25 sites
- Pterinea25 sites
- Illaenus24 sites
- Leptaena24 sites
- Ambocoelia23 sites
- Calymene23 sites
- Leioclema23 sites
- Protochonetes ludloviensis23 sites
- Salopina lunata23 sites
- Tentaculites23 sites
- Zoophycos23 sites
- Camarotoechia22 sites
The Paleobiology Database records 843 sites for Orthoceratidae, 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
281 references- Zonation of the Middle and Upper Ordovician strata in northwestern Georgia55
- Biostratigraphy of the Middle and Late Ordovician cephalopods of the Upper Mississippi Valley area54
- Faunas from the Upper Silurian (Upper Ludlovian) in the Ludlow-Much Wenlock District, England34
- Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician26
- Redefinition, Stratigraphy and Depostional Environments of the Mottville Member (Hamilton Group) in Central and Eastern New York25
- Correlation of the African Silurian rocks24
- Stratigraphic Summary of the Southwestern Region of China22
- Nautiloid assemblages from middle-late Silurian of southwestern Sardinia: a proposal21
- Nautiloids before and during the ammonoid origin in a Siluro–Devonian section of the Tafilalt (Morocco)20
- 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; Paleobiology16
- Preliminary catalogue and report on the biostratigraphy and palaeogeographic distribution of the Bokkeveld fauna16
- Stratigraphy of the Lower Middle Ordovician of Tazewell County, Virginia15
Each of the 1,118 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. 269 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 Orthoceratidae
- Source
- Wikipedia/Commons
- Credit
- Nobu Tamura ( http://spinops.blogspot.com )
- Licence
- CC BY 3.0
- Commercial use
- the licence allows it
No 3D scan of Orthoceratidae 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 itOrthocerida through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. M'Coy 1844