Cosmasyrinx
Cosmasyrinx is an extinct genus of sea snails, marine gastropod mollusks, unassigned to a family within the superfamily Conoidea.

via iDigBio · CC0 · via iDigBio. 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
- TurrinaePBDB
- Diet
- carnivorePBDB, for Turridae
- Life habit
- epifaunalPBDB, for Turridae
- Motility
- actively mobilePBDB, for Turridae
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 27 million years on record.
The record covers at least 61.66 Mya to 33.9 Mya. No occurrence read is dated outside 66 Mya to 27.3 Mya.
10 occurrences of Cosmasyrinx on record, most of them in the Paleocene. 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
10 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
6 formations
- La Meseta Formation3
- Pebble Point Formation2
- Kauru Formation · Fuchsia Group2
- López de Bertodano Formation1
- Deborah Volcanic Formation · Alma Group1
- Submeseta Formation1
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The named rock units Cosmasyrinx has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Cosmasyrinx and its relatives
PaleoceneWhere Cosmasyrinx and its relatives were recorded in the Paleocene.
Found in the same rock
164 taxa- Austrotoma oliveroi3 sites
- Lahillia wilckensi3 sites
- Penion australocapax3 sites
- Polinices (Polinices) subtenuis3 sites
- Saxolucina sharmani3 sites
- Struthioptera camachoi3 sites
- Sudonassarius antarctohimaleos3 sites
- Zelandiella verrucosa3 sites
- Acteon2 sites
- Agatha scotti2 sites
- Anomia2 sites
- Antarctodarwinella nordenskjoldi2 sites
- Aphrodina (Tikia)2 sites
- Astarte (Astarte)2 sites
- Aturoidea distans2 sites
- Australoneilo2 sites
- Australoneilo rossi2 sites
- Austrobuccinum tuberosum2 sites
- Austroficopsis wimani2 sites
- Austrofusus2 sites
- Austrosullivania striata2 sites
- Bertinella lapidaria2 sites
- Cadulus (Gadila) antarctotubulus2 sites
- Calliotropis2 sites
The Paleobiology Database records 6 sites for Cosmasyrinx, 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
4 references- Molluscan Systematics and Biostratigraphy4
- The Geology of the Waitaki Subdivision3
- Gastropoda, Scaphopoda, Cephalopoda, and new Bivalvia of the Paleocene Pebble Point Formation, Victoria, Australia2
- Early Paleocene Mollusks of Antarctica: Systematics, Paleoecology and Paleobiogeographic Significance1
Each of the 10 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 Cosmasyrinx
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- Source
- Wikipedia, “Cosmasyrinx”
- 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 itTurrinae through timeFormations of the PaleoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Marwick 1931