Callianassa
Callianassa is a genus of mud shrimps, in the family Callianassidae. Three of the species in this genus have been split off into a new genus, Pestarella, while others such as Callianassa filholi have been moved to Biffarius. The genus is named after the Nereid of the Greco-Roman mythology.

Adam White (1817–1879) · Public Domain · via Wikidata/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
- CallianassidaePBDB
- Diet
- detritivorePBDB, for Axiidea
- Life habit
- infaunalPBDB, for Axiidea
- Motility
- actively mobilePBDB, for Malacostraca
- Vision
- well-developedPBDB, for Malacostraca
Time the record covers
At least 142 million years on record.
The record covers at least 143.1 Mya to 129 ka. No occurrence read is dated outside 201.4 Mya to 0 Mya.
296 occurrences of Callianassa on record, most of them in the Eocene. The Paleobiology Database records this as a living group. 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
296 occurrences- Early Jurassicunder 1%
- Middle Jurassicunder 1%
- Late Jurassicunder 1%
- Early Cretaceous5%
- Late Cretaceous20%
- Paleocene9%
- Eocene27%
- Oligocene9%
- Miocene26%
- Pliocene2%
- Pleistocene2%
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
104 formations
- Culebra Formation13
- Maadi Formation12
- Clayton Formation · Midway Group9
- Winona Formation · Claiborne Group5
- Yorktown Formation5
- Roca Formation · Malargüe Group4
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The named rock units Callianassa has been recovered from, largest first. Drawn where the rock is now, not where it formed. 80 further formations hold fewer occurrences each and are not listed. 112 occurrences have no formation on record, which is common for older literature.
Callianassa and its relatives
EoceneWhere Callianassa and its relatives were recorded in the Eocene.
Found in the same rock
2,501 taxa- Turritella19 sites
- Glycymeris11 sites
- Ostrea11 sites
- Cardium9 sites
- Cucullaea9 sites
- Dentalium9 sites
- Natica9 sites
- Nucula9 sites
- Crassatella8 sites
- Gastropoda7 sites
- Tellina7 sites
- Calappa heberti6 sites
- Crocodylia6 sites
- Cylichna6 sites
- Echinoidea6 sites
- Glypturus fraasi6 sites
- Gyrodes6 sites
- Modiolus6 sites
- Nuculana6 sites
- Petrochirus priscus6 sites
- Pilumnus mediterraneus6 sites
- Pinna6 sites
- Serpula6 sites
- Teredo6 sites
The Paleobiology Database records 170 sites for Callianassa, 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
109 references- Fossil Crustacea of the Atlantic and Gulf Coastal Plain28
- The fossil stalk-eyed Crustacea of the Pacific slope of North America25
- Decapod crustacea of the Badenian18
- Decapod crustaceans from the Panama region16
- Decapod crustaceans from the Miocene Kukinaga Group, Tanegashima Island, Kyushu, Japan11
- Über Crustaceen aus dem Tertiär Aegyptens9
- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region7
- Beiträge zur Decapodenfauna des ungarischen Tertiärs. Über die Brachyuren der palaeontologischen sammlung des bayerischen Staates7
- The Cretaceous decapod Crustacea of Argentina and the Antarctic Pensinsula6
- Middle Eocene and Oligocene Decapod Crustaceans from Texas, Louisiana, and Mississippi6
- Mesozoic and Tertiary Decapod Crustacea from Mexico5
- Tawadros, 20015
Each of the 296 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. 97 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 Callianassa
- Source
- Wikidata/Commons
- Credit
- Adam White (1817–1879)
- Licence
- Public Domain
- 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, “Callianassa”
- 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 itCallianassidae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Leach 1814