Eoorthidae

Not Eoorthidae. This is Wimanella Walcott, 1908, a relative — both are Eoorthidae.
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
- PlectorthoideaPBDB
- Diet
- suspension feederPBDB, for Orthida
- Life habit
- epifaunalPBDB, for Orthida
- Motility
- stationary, attachedPBDB, for Orthida
- Vision
- blindPBDB, for Rhynchonellata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At least 43 million years on record.
The record covers at least 509.7 Mya to 465.9 Mya. No occurrence read is dated outside 515.3 Mya to 458 Mya.
162 occurrences of Eoorthidae 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
162 occurrences- Cambrian41%
- Ordovician59%
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
65 formations
- Deadwood Formation15
- Trenice Formation12
- Tongzi Formation6
- Open Door Limestone Formation6
- Jbel Wawrmast Formation · Feijas internes Group5
- Honey Creek Limestone Formation5
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The named rock units Eoorthidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 41 further formations hold fewer occurrences each and are not listed. 17 occurrences have no formation on record, which is common for older literature.
Eoorthidae and its relatives
OrdovicianWhere Eoorthidae and its relatives were recorded in the Ordovician.
Found in the same rock
673 taxa- Apheoorthis38 sites
- Eoorthis28 sites
- Lingulella22 sites
- Asaphellus18 sites
- Nanorthis14 sites
- Hystricurus13 sites
- Acrotreta11 sites
- Geragnostus10 sites
- Eoorthis remnicha9 sites
- Obolus9 sites
- Orygmaspis contracta9 sites
- Megistaspis8 sites
- Symphysurina8 sites
- Syntrophina8 sites
- Dictyonema7 sites
- Eocrinoidea7 sites
- Eoorthis indianola7 sites
- Lycophoria7 sites
- Niobe (Niobella)7 sites
- Apatokephalus6 sites
- Apheoorthis ocha6 sites
- Elvinia roemeri6 sites
- Euloma6 sites
- Finkelnburgia6 sites
The Paleobiology Database records 133 sites for Eoorthidae, 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
65 references- Upper Cambrian faunas from the northwest Wind River Mountains, Wyoming. Part 19
- Index of Fossiliferous Localities of the Trenice Formation (Lower Ordovician of the Prague Basin, Czech Republic)8
- Upper Cambrian and Lowest Ordovician Articulate Brachiopods from the Arbuckle and Wichita Mountains, Oklahoma8
- Stratigraphic Summary of the Southwestern Region of China8
- Biostratigrafiya i trilobity verkhnego Kembriya i nizhnego Ordovika severo-zapada Sibirskoy Platformy [Biostratigraphy and trilobites of the Upper Cambrian and Lower Ordovician of the northwestern Siberian platform]8
- On the Early Ordovician of Sweden stratigraphy and fauna8
- Protorthacean brachiopods from the Middle Cambrian of Morocco5
- Trilobites from the upper part of the Deadwood Formation (Upper Franconian and Trempealeauan stages, Upper Cambrain), Black Hills, South Dakota5
- The biostratigraphy of the Ordovician of Bohemia5
- Linguliform brachiopods from the Cambrian (Guzhangian) Karpinsk Formation of Novaya Zemlya4
- Morphometric analysis of Tremadocian (earliest Ordovician) kirkocystid mitrates (Echinodermata, Stylophora) from the Taebaeksan Basin, Korea4
- Ordovician of the siberian Platform: Key section on the Kulumbe River4
Each of the 162 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. 53 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 Wimanella Walcott, 1908
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Eoorthidae 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 itPlectorthoidea through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Walcott 1908