Cyanagraea Explained

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 2535m-2630mm (8,317feet-8,630feetm) on the East Pacific Rise, where it lives "in the upper part of black smoker chimneys".^[3] Its haemocyanin has a strong affinity for oxygen, and displays a significant Bohr effect, which is unaffected by lactic acid.^[4]

Cyanagraea praedator is "by far the largest" species in the family Bythograeidae, growing to a maximum carapace size of 123mm74.8mm.^[5]

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

Further reading

• . 1984 . Crustacès dècapods d'un site hydrothermal actif de la dorsale du Pacific oriental (13° Nord), en provenance de la campagne française Biocyatherm . . sèrie III . 299 . 355–360.
• Robert R. Hessler . Joel W. Martin . 1989 . Austinograea williamsi, new genus, new species, a hydrothermal vent crab (Decapoda: Bythograeidae) from the Mariana Back-Arc Basin, Western Pacific . . 9 . 4 . 645–661 . 1548594 . 10.2307/1548594.

External links

• Cyanagraea praedator Saint Laurent, 1984, LifeDesks

Notes and References

1. Peter Davie . 2011 . Cyanagraea Saint Laurent, 1984 . 439193 . November 27, 2011.
2. . 2008 . 17 . 1–286 . Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world . Peter K. L. Ng . Danièle Guinot . Peter J. F. Davie . dead . https://web.archive.org/web/20110606061453/http://rmbr.nus.edu.sg/rbz/biblio/s17/s17rbz.pdf . 2011-06-06 .
3. 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 . . 45 . 4 . 351–359 . 10.1002/prot.10014 . 11746683. 32797638 .
4. Stéphane Hourdez . François H. Lallier . August 2007 . . 6 . 1–3 . Adaptations to hypoxia in hydrothermal-vent and cold-seep invertebrates . 143–159 . 10.1007/s11157-006-9110-3 . 2007RESBT...6..143H . 84727739 . dead . https://web.archive.org/web/20120406184557/http://www.sb-roscoff.fr/Ecchis/pdf/07-Hourdez-RESB.pdf . 2012-04-06 .
5. 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) . . 1524 . 1–22 . 10.11646/zootaxa.1524.1.1 .
6. 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 . . 1286 . 15–21 . PDF excerpt.