Cyanagraea

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Crustacea
Superclassis: Multicrustacea
Classis: Malacostraca
Subclassis: Eumalacostraca
Superordo: Eucarida
Ordo: Decapoda
Subordo: Pleocyemata
Infraordo: Brachyura
Sectio: Eubrachyura
Subsectio: Heterotremata
Superfamilia: Bythograeoidea

Familia: Bythograeidae
Genus: Cyanagraea
Species: C. praedator
Name

Cyanagraea de Saint Laurent, 1984
References

M. de Saint Laurent (1984). Crustacès dècapods d'un site hydrothermal actif de la dorsale du Pacific oriental (13° Nord), en provenance de la campagne française Biocyatherm. Comptes Rendus de l'Acadèmie des Sciences de Paris, sèrie III. 299:355–360.

Cyanagraea praedator is a species of crab that lives on hydrothermal vents, and the only species in the genus Cyanagraea.[1][2]

It is found at depths of 2,535–2,630 m (8,317–8,629 ft) on the East Pacific Rise,[3] where it lives "in the upper part of black smoker chimneys".[4] Its haemocyanin has a strong affinity for oxygen, and displays a significant Bohr effect, which is unaffected by lactic acid.[5]

Cyanagraea praedator is "by far the largest" species in the family Bythograeidae, growing to a maximum carapace size of 123.0 mm × 74.8 mm (4.84 in × 2.94 in).[3]

The leech Bathybdella sawyeri has been observed attached to C. praedator.[6]
References

Peter Davie (2011). "Cyanagraea Saint Laurent, 1984". WoRMS. World Register of Marine Species. Retrieved November 27, 2011.
Peter K. L. Ng; Danièle Guinot; Peter J. F. Davie (2008). "Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world" (PDF). Raffles Bulletin of Zoology. 17: 1–286. Archived from the original (PDF) on 2011-06-06.
Colin McLay (2007). "New crabs from hydrothermal vents of the Kermadec Ridge submarine volcanoes, New Zealand: Gandalfus gen. nov. (Bythograeidae) and Xenograpsus (Varunidae) (Decapoda: Brachyura)" (PDF). Zootaxa. 1524: 1–22.
Fabienne Chausson; Christopher R. Bridges; Pierre-Marie Sarradin; Brian N. Green; Ricardo Riso; Jean-Claude Caprais; François H. Lallier (2001). "Structural and functional properties of hemocyanin from Cyanagraea praedator, a deep-sea hydrothermal vent crab". Proteins: Structure, Function, and Bioinformatics. 45 (4): 351–359. doi:10.1002/prot.10014. PMID 11746683.
Stéphane Hourdez; François H. Lallier (August 2007). "Adaptations to hypoxia in hydrothermal-vent and cold-seep invertebrates" (PDF). Reviews in Environmental Science and Bio/Technology. 6 (1–3): 143–159. doi:10.1007/s11157-006-9110-3. Archived from the original (PDF) on 2012-04-06.

Eugene M. Burreson; Michel Segonzac (2006). "Morphological variability of Bathybdella sawyeri (Hirudinida: Piscicolidae) from hydrothermal vents on the Galápagos Rift and the South East Pacific Rise" (PDF excerpt). Zootaxa. 1286: 15–21.