Callistoctopus rapanui

Callistoctopus rapanui, or the rapanui octopus,[1] is the only endemic octopus species in Rapa Nui (or Easter Island).[2] It was first described by Gilbert L. Voss in 1979[3] as Octopus rapanui.[4]

Callistoctopus rapanui
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Octopoda
Family: Octopodidae
Genus: Callistoctopus
Species:
C. rapanui
Binomial name
Callistoctopus rapanui
Voss, 1979

Description

Callistoctopus rapanui is large and muscular, with a mantle length of up to 115 millimeters and a total length of up to 550 millimeters. It has scattered rough tubercles across the body.[5] The arms are 3.5 to 4.5 times the length of the mantle, and have two rows of suckers each. C. rapanui is cream-gray with a darker purple hue on its dorsal surfaces.[6] Its most distinctive feature is a "straight, out-turned" rostrum.[7]

Distribution

Callistoctopus rapanui is subtropical[1] and only known in Rapa Nui.[6] It is benthic,[1] and found at depths of zero to four meters.[6]

Use by humans

Callistoctopus rapanui are fished for food in Rapa Nui, and make up 0.6% of subsistence fishing catch.[8]

References
  1. "Callistoctopus rapanui (Voss, 1979)". SeaLifeBase. Retrieved 2023-03-27.
  2. Carrasco, Sergio A.; Meerhoff, Erika; Yannicelly, Beatriz; Ibanez, Christian M. (2019). "First Records and Descriptions of Early Life Stages of Cephalopods from Rapa Nui (Easter Island) and the Nearby Apolo Seamount". Pacific Science. 73 (1): 163–175.
  3. Voss, Gilbert L. (1979). "Octopus rapanui, New Species from Easter Island (Cephalopoda: Octopoda)". Proceedings of the Biological Society of Washington. 92 (2): 360–367 – via Biodiversity Heritage Library.
  4. Finn, Julian (2017-11-18). "Callistoctopus rapanui (Voss, 1979)". World Register of Marine Species. Retrieved 2023-03-27.
  5. Rehder, Harold A. (1980). The Marine Mollusks of Easter Island (Isla de Pascua) and Sala y Gomez (PDF). Smithsonian Contributions to Zoology 289. Washington, DC: Smithsonian Institution Press.
  6. Norman, M. D.; Finn, J. K.; Hochberg, F. G. (2016). "Family Octopodidae". In Jereb, Patrizia; Roper, Clyde F. E.; Norman, Mark D.; Finn, Julian K. (eds.). Cephalopods of the World: An Annotated and Illustrated Catalogue of Cephalopod Species Known to Date (PDF). FAO Species Catalogue for Fishery Purposes No. 4, Vol. 3. Vol. 3: Octopods and Vampire Squids. Rome, Italy: Food and Agriculture Organization of the United Nations. ISBN 978-92-5-107989-8. ISSN 1020-8682.
  7. Voight, Janet R. (1998). "An Overview of Shallow-Water Octopus Biogeography". In Voss, Nancy A.; Vecchione, Michael; Toll, Ronald B.; Sweeney, Michael J. (eds.). Systematics and Biogeography of Cephalopods (PDF). Smithsonian Contributions to Zoology Number 586. Vol. II. Washington, DC: Smithsonian Institution Press.
  8. Zylich, Kyrstn; Harper, Sarah; Licandeo, Roberto; Vega, Rodrigo; Zeller, Dirk; Pauly, Daniel (2014). "Fishing in Easter Island, a recent history (1950-2010)". Latin American Journal of Aquatic Research. 42 (4): 845–856. doi:10.3856/vol42-issue4-fulltext-11. ISSN 0718-560X.
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