Global InformationCallichimaera information
| Callichimaera Temporal range: Middle Cretaceous,
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| Paratype specimen (MUN-STRI 27044-02) | |
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| Life restoration C. perplexa | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| Infraorder: | Brachyura |
| Superfamily: | †Callichimaeroidea Luque et al., 2019 |
| Family: | †Callichimaeridae Luque et al., 2019 |
| Genus: | †Callichimaera Luque et al., 2019 |
| Species: | †C. perplexa
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| Binomial name | |
| †Callichimaera perplexa Luque et al., 2019
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| Synonyms | |
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Callichimaera perplexa is a species of small crabs known from the Cretaceous Churuvita Group of Colombia and the Frontier Formation of the United States.[2] Because it possesses a strange combination of anatomical features, it is said to be the "platypus of crabs".[3] The presence of certain features in this species, such as its large claws and swimming limbs, confirm that those features were present in the crab lineage up to 95 million years ago.[4] It evolved during the Cretaceous crab revolution.
- ^ Luque, Javier (2012). Taxonomy, Biogeography and Phylogeny of Cretaceous Frog Crabs (Crustacea: Decapoda: Brachyura) from the Neotropics (PDF) (Tesis thesis). Mémoire présenté à la Faculté Faculté des Arts et des Sciences en vue de l’obtention du grade de M.Sc. en sciences biologiques.
- ^ Luque, J.; Feldmann, R. M.; Vernygora, O.; Schweitzer, C. E.; Cameron, C. B.; Kerr, K. A.; Vega, F. J.; Duque, A.; Strange, M.; Palmer, A. R.; Jaramillo, C. (24 April 2019). "Exceptional preservation of mid-Cretaceous marine arthropods and the evolution of novel forms via heterochrony". Science Advances. 5 (4): eaav3875. Bibcode:2019SciA....5.3875L. doi:10.1126/sciadv.aav3875. PMC 6482010. PMID 31032408.
- ^ "Meet Callichimaera perplexa, the platypus of crabs". YaleNews. 24 April 2019. Retrieved 1 May 2019.
- ^ "How did crabs evolve 'crabbiness'? It's complicated". Science & Innovation. 24 April 2019. Archived from the original on April 24, 2019.