Callistoctopus rapanui (Voss 1979) articles

Comprehensive Description

provided by Smithsonian Contributions to Zoology

Octopus rapanui Voss, 1979

DIAGNOSIS.—Animal medium-sized to large (to 550 mm TL, to 115 mm ML). Mantle saccular (MWI 41–74); neck and head narrow (HWI 29–52). Funnel organ apparently W- shaped, lateral limbs slightly longer than medial limbs. Arms moderate in length (ALI 75–80) (ALI of 96 reported in original description in error), stout basally but tapering to long slender tips. Arm order I > II > III > IV. Sucker size moderate to large (SIn 9–11); especially enlarged suckers absent in males and females. Right arm III of males hectocotylized (HALI 212.4–297.1), shorter than fellow arm (FAI 72–95); spermato- phoral groove conspicuous, becomes wider and deeper at base of calamus to form pocket-like depression; ligula minute to small (LLI 1.4–4.0), moderately excavated with thickened edges; calamus moderate to large (CLI 29–33). Web shallow to moderate (WDI 18–22), web formula variable. Lower mandible with straight, out-turned rostrum resembling spine. Gill lamellae 11 to 12. Radula with exceptionally tall rachidian tooth with one or two cusps with B4. 5 seriation. Surface of mantle with scattered, prominent, flat papillae, slightly larger over eyes. General color in preservation purple dorsally; lighter, tan ventrally.

ORIGINAL DESCRIPTION.—Voss, 1979:360, figs. 1, 2.

TYPE LOCALITY.—Eastern south-central Pacific Ocean, Easter Island, Hanga Diko.

TYPE.—Holotype: USNM 729860, male, 115 mm ML, in alcohol, good condition.

DISTRIBUTION.—Known only from Easter Island.

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bibliographic citation: Voss, N. A. and Sweeney, M. J. 1998. "Systematics and Biogeography of cephalopods. Volume II." Smithsonian Contributions to Zoology. 277-599. https://doi.org/10.5479/si.00810282.586.277

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Callistoctopus rapanui

provided by wikipedia EN

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]

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

^ ^a ^b ^c "Callistoctopus rapanui (Voss, 1979)". SeaLifeBase. Retrieved 2023-03-27.
^ 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.
^ 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.
^ Finn, Julian (2017-11-18). "Callistoctopus rapanui (Voss, 1979)". World Register of Marine Species. Retrieved 2023-03-27.
^ 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.
^ ^a ^b ^c 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.
^ 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.
^ 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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Callistoctopus rapanui: Brief Summary

provided by wikipedia EN

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

license: cc-by-sa-3.0
copyright: Wikipedia authors and editors

original: visit source
partner site: wikipedia EN