Overview

Comprehensive Description

Description

"This crab lives symbiotically with the teat-fish (Holothuria nigra). It hides under or among the tentacles, coming out from shelter at times, perhaps to feed, and crawling all over the body of its host on which it crouches if disturbed. Its dark purple coloring with white spots is protective, resembling the sticky black skin of the teat-fish with grains of coral sand adherent. Paler brown forms live on other Holothurians to whose color their own is adapted. The other two species taken by the Expedition are roughly speaking sand-colored, and there is no record of their living symbiotically with other organisms. The females of L. orbicularis show a very perfect condition of an arrangement found in various other swimming crabs. That is to say, there is a well-developed brood-pouch formed by a deep sternal hollow surrrounded with a fringe of hair and floored by the abdomen, whose sides are also edged with hair. One specimen had many fully hatched zoaeas in this pouch, and it would be interesting to know how long these young remain there, and how much of their development is passed there (Borradaile, 1902; pg. 200)."

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Nolasco, Jannel

Source: Maldives and Laccadives

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Ecology

Habitat

Depth range based on 12 specimens in 1 taxon.
Water temperature and chemistry ranges based on 5 samples.

Environmental ranges
  Depth range (m): 7 - 61
  Temperature range (°C): 24.091 - 25.567
  Nitrate (umol/L): 0.154 - 1.347
  Salinity (PPS): 35.083 - 35.464
  Oxygen (ml/l): 4.640 - 4.932
  Phosphate (umol/l): 0.110 - 0.201
  Silicate (umol/l): 1.111 - 3.887

Graphical representation

Depth range (m): 7 - 61

Temperature range (°C): 24.091 - 25.567

Nitrate (umol/L): 0.154 - 1.347

Salinity (PPS): 35.083 - 35.464

Oxygen (ml/l): 4.640 - 4.932

Phosphate (umol/l): 0.110 - 0.201

Silicate (umol/l): 1.111 - 3.887
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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"The species was taken on the shore and also dredged. It was found in Minikoi, Hulule, Male Atoll, Furnardu velu, Miladumadulu, South Nilandu, and Mulaku (Borradaile, 1902; pg. 200)."

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Nolasco, Jannel

Source: Maldives and Laccadives

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Lissocarcinus orbicularis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 4
Specimens with Barcodes: 5
Species With Barcodes: 1
Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Barcode data: Lissocarcinus orbicularis

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Genomic DNA is available from 1 specimen with morphological vouchers housed at Museum of Tropical Queensland
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Ocean Genome Legacy

Source: Ocean Genome Resource

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Wikipedia

Lissocarcinus orbicularis

Lissocarcinus orbicularis, common names sea cucumber crab[2] and red-spotted white crab,[1] is a species of crabs in the family Portunidae.[1]

Distribution and ecology[edit source | edit]

Lissocarcinus orbicularis grows to about 4 cm (1.6 in), and has a smooth, glabrous carapace with distinctive spots. The carapace is slightly shorter than it is broad and has a highly convex shape.

This species has a commensalistic relationship with certain sea cucumbers. It can be found within the gut cavity, or near the oral tentacles and anus of sea cucumber species Holothuria whitmaei, Actinopyga obesa, and most commonly Holothuria atra.[3]

Distribution[edit source | edit]

The type locality for this species is Fiji, and it is widely distributed in the Indo-Pacific. It is also found in the Red Sea.

References[edit source | edit]

  1. ^ a b c Peter Davie (2012). "Lissocarcinus orbicularis Dana, 1852". World Register of Marine Species. Retrieved May 27, 2012. 
  2. ^ Tsune Sakai. "Sea cucumber crab (Lissocarcinus orbicularis)". Crabs of Japan. Marine Species Identification Portal. Retrieved June 19, 2012. 
  3. ^ Paula Ayotte (2005). "The relationship between holothurians and the portunid crab Lissocarcinus orbicularis". University of Hawaii at Hilo. hdl:10125/21792. 

Further reading[edit source | edit]

  • Lyskin, S. A. & T. A. Britayev (2001). "An association of symbiotic crab Lissocarcinus orbicularis Dana, 1852 (Decapoda, Portunidae) with tropical holothurians". Fifth International Crustacean Congress and Summer 2001 meeting of The Crustacean Society. Melbourne. 
  • Lyskin, S. A. & T. A. Britayev (2003). "The pattern of Vietnamese holothurians symbionts interactions". Proceedings of the 11th International Echinoderm Conference, Munich. 
  • R. Jared Halterman (December 1, 2006). "The incidence of infestation of Holothuria atra by Lissocarcinus orbicularis" (DOC). Brigham Young University–Hawaii. 
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