Atrypa reticularis
Atrypa is a genus of brachiopod with round to short egg-shaped shells covered with many fine radial ridges. Growth lines form perpendicular to the costae and are spaced approximately 2 to 3 times further apart than the costae.. The pedunculate valve is slightly convex, but oftentimes levels out or becomes slightly concave toward the anterior margin. The brachial valve is highly convex. Neither valve contains an interarea. Atrypa had a large geographic range and occurred from the late Lower Silurian (Telychian) to the early Upper Devonian (Frasnian). Other sources expand the range from the Late Ordovician to Carboniferous, approximately from 449 to 336 Ma. A proposed new species, A. harrisi, was found in the trilobite-rich Floresta Formation in Boyacá, Colombia.

Dwergenpaartje · CC BY-SA 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
- AtrypaPBDB
- Diet
- suspension feederPBDB, for Atrypida
- Life habit
- epifaunalPBDB, for Atrypida
- Motility
- stationaryPBDB, for Atrypida
- Vision
- blindPBDB, for Rhynchonellata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At least 55 million years on record.
The record covers at least 438.1 Mya to 382.31 Mya. No occurrence read is dated outside 443.1 Mya to 358.86 Mya.
493 occurrences of Atrypa reticularis on record, most of them in the Silurian. 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
493 occurrencesThese 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
160 formations
- Onondaga Formation47
- Rochester Formation · Clinton Group19
- Irondequoit Formation · Clinton Group18
- Roberts Mountain Formation13
- Scotch Grove Formation11
- Coopers Creek Limestone Formation10
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The named rock units Atrypa reticularis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 136 further formations hold fewer occurrences each and are not listed. 41 occurrences have no formation on record, which is common for older literature.
Atrypa reticularis and its relatives
SilurianWhere Atrypa reticularis and its relatives were recorded in the Silurian.
Found in the same rock
1,436 taxa- Leptaena rhomboidalis87 sites
- Isorthis67 sites
- Bryozoa66 sites
- Favosites57 sites
- Dalejina52 sites
- Crinoidea50 sites
- Howellella41 sites
- Resserella41 sites
- Eospirifer radiatus40 sites
- Eospirifer35 sites
- Gypidula34 sites
- Heliolites33 sites
- Microsphaeridiorhynchus nucula32 sites
- Craniops31 sites
- Gastropoda31 sites
- Calymene30 sites
- Sphaerirhynchia wilsoni30 sites
- Fenestella29 sites
- Stromatoporoidea29 sites
- Anthozoa28 sites
- Cyrtia exporrectus28 sites
- Nucleospira28 sites
- Howellella elegans27 sites
- Schuchertella27 sites
The Paleobiology Database records 478 sites for Atrypa reticularis, 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
108 references- The Clinton of Western and Central New York56
- Caradocian-Gedinnian echinoderm associations of Central and Eastern North America28
- Brachiopods and Community Ecology of the Onondaga Limestone25
- Pridolian and early Gedinnian age brachiopods from the Roberts Mountains Formation of central Nevada21
- Silurian Reefs of Gotland19
- Stratigraphy of the Onondaga Limestone in Central New York17
- Wenlockian fossil communities in New York State and adjacent areas: Paleontology and Paleoecology15
- Geology and mineral deposits of southeastern Alaska14
- A review of Silurian brachiopods from Gotland13
- Brachiopod communities of the Lithuanian Silurian12
- The palaeontology and stratigraphy of the Siluro-Devonian sediments of the Tyers Area, Gippsland, Victoria12
- The relationship between sedimentary facies and faunal associations in the Llandovery siliclastic Ross Brook Formation, Arisaig, Nova Scotia11
Each of the 493 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. 96 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 content2
Picture of Atrypa reticularis
- Source
- Wikipedia/Commons
- Credit
- Dwergenpaartje
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Credit
- Shellie Luallin
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
The description on this site
- Source
- Wikipedia, “Atrypa”
- 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 itAtrypa through timeFormations of the SilurianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Linnaeus 1758)