Look Alikes
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добавил Invertebrates of the Salish Sea
How to Distinguish from Similar Species: Cryptolothodes sitchensis has a similar carapace but its rostrum is widest at the tip and its chelae are smooth.
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Comprehensive Description
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добавил Invertebrates of the Salish Sea
Biology/Natural History: Feeds on bryozoans, coralline algae, and other attached species. Usually lives deeper than does C. sitchensis.
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Habitat
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добавил Invertebrates of the Salish Sea
Rocky banks, shell rubble near rocky cliffs. Open coast or inland waters, especially in high current areas.
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Distribution
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добавил Invertebrates of the Salish Sea
Geographical Range: Amchitka Island, Alaska to Santa Rosa Island, CA. Less common in the southern parts of the range.
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Habitat
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добавил Invertebrates of the Salish Sea
Depth Range: Low intertidal to 45 m
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Comprehensive Description
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добавил Invertebrates of the Salish Sea
This lithodid crab has a carapace that spreads hugely, covering not only the thoracic segments but extending so far out that when the animal is inactive not even the tips of the legs can be seen from above. The rostrum is widest at the base and narrower at the tip. The propodus of its chelipeds are covered with rough tubercles, and its abdominal plates have a raised ridge around the margin. Carapace color is quite variable, from dark gray-blue as here to bright orange, white, or red. The central part of the carapace is often a different color than the "wings". Carapace width to 8 cm.
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Butterfly crab
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англиски
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Cryptolithodes typicus, often referred to as the butterfly crab or the turtle crab,[3][4] is a species of lithodid crustacean native to coastal regions of the northeastern Pacific Ocean, ranging from Amchitka Island, Alaska to Santa Rosa Island, California.[5]
Appearance
The crab's butterfly-shaped carapace has a stone-like camouflage, which it uses to blend in against the rocks of the subtidal and low intertidal zones.[3] Carapace color within the species varies greatly, but small individuals (< 15 mm (0.6 in) in length) are typically white, while larger ones tend to have an assortment of vibrant colors.[3] The carapace is exceptionally broad and completely hides the appendages when viewed from above or from the side; it has a median raised crest which is often a different color that contrasts with other parts. The male carapace is at its widest at a point further back than that of the female. The chelipeds of the male are relatively larger than the widest point of the female. The right claw is larger than the left and both claws are sharp, curved, and stout. Each segment of the walking legs has a dorsal crest.[3][6]
Habitat
The butterfly crab resides on rocks within the subtidal and low intertidal zones.[3][7] When its intertidal habitat is exposed to the atmosphere during extreme low tide, it can be found clinging to the substratum in rock crevices or at the base of the seagrass Phyllospadix.[3] It has been found to a depth of 73 meters (240 ft).[8]
Etymology
The genus name "Cryptolithodes" means "hidden stone",[3] while its species name "typicus" denotes it as the genus' type species. The nickname "butterfly crab" is derived from the crab's carapace, which resembles a butterfly, and the nickname "turtle crab" derives from the way its carapace covers its appendages from above and the sides.[3][9]
See also
References
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^ "Cryptolithodes typicus". NatureServe. Retrieved 15 May 2020.
{{cite web}}: CS1 maint: url-status (link) -
^ von Brandt, Johann Friedrich (1849). "Die Gattung Lithodes Latreille nebst vier neuen ihr verwandten von Wosnessenski entdeckten, als Typen einer besondern Unterabteilung (Tribus Lithodea) der Edwards'schen Anomuren". Bulletin de la Classe physico-mathématique de l'Académie Impériale des Sciences de Saint Pétersbourg (in German). 7: 171–175. ISSN 1029-998X.
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^ a b c d e f g h Hart, Josephine F. L. (May 1965). "Life History and Larval Development of Cryptolithodes typicus Brandt (Decapoda, Anomura) from British Columbia". Crustaceana. 8 (3): 255–276. doi:10.1163/156854065X00460. JSTOR 20102652.
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^ Lamb, Andy (2005). "AR140. Butterfly Crab". Marine Life of the Pacific Northwest: A Photographic Encyclopedia of Invertebrates, Seaweeds and Selected Fishes. Photography by Bernard P. Hanby. Harbour Publishing. p. 312. ISBN 978-1550173611. LCCN 2006389416.
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^ Hart, Josephine F. L. (1982). Crabs and their relatives of British Columbia (PDF). British Columbia Provincial Museum Handbook 40. ISBN 978-0771883149. LCCN 83138488. Archived (PDF) from the original on May 24, 2019.
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^ Coffin, Harold Glen (March 1952). Crabs of Puget Sound, Washington (PDF) (Master of Arts thesis). Walla Walla College. p. 37–38. Archived (PDF) from the original on May 15, 2020.
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^ Barr, Nancy (November 1973). "Extension of the Known Range of the Crab, Cryptolithodes typicus Brandt, To Amchitka Island, Alaska (Decapoda, Anomura, Lithodidae)". Crustaceana. 25 (3): 320–321. doi:10.1163/156854073X00308. JSTOR 20102049.
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^ Gotshall, Daniel W. (2005). 2005 Guide to marine invertebrates: Alaska to Baja California (2nd, revised ed.). Sea Challengers. ISBN 978-0930118372. LCCN 2005042635.
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^ "Butterfly crab". Merriam-Webster. Archived from the original on December 7, 2017. Retrieved May 15, 2020.
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Butterfly crab: Brief Summary
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Cryptolithodes typicus, often referred to as the butterfly crab or the turtle crab, is a species of lithodid crustacean native to coastal regions of the northeastern Pacific Ocean, ranging from Amchitka Island, Alaska to Santa Rosa Island, California.
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Cryptolithodes typicus
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холандски; фламански
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Cryptolithodes typicus is een tienpotigensoort uit de familie van de Lithodidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1848 door Brandt.
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22-03-2013
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