MarLIN

information on the biology of species and the ecology of habitats found around the coasts and seas of the British Isles

Sea piglet (Arrhis phyllonyx)

Distribution data supplied by the Ocean Biogeographic Information System (OBIS). To interrogate UK data visit the NBN Atlas.

Summary

Description

Arrhis phyllonyx is a compact gammarid amphipod. It has a laterally compressed but moderately cylindrical body consisting of a head with two pairs of antennae, seven thoracic segments and limbs forming a pereon and six abdominal segments and limbs forming a pleon as well as a tail with three limbs. The head has a conspicuous downturned rostrum. The eyes are more or less joined dorsally. The telson is relatively small but entire. It is pale orange in colour. Little is known about the maximum size of Arrhis phyllonyx.

Recorded distribution in Britain and Ireland

A generally more northern species, it has been found off the south coast of Orkney, Scotland and off northern Ireland.

Global distribution

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Habitat

Arrhis phyllonyx is a pelagic species thought to inhabit deep offshore waters.

Depth range

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Identifying features

  • Head with conspicuous downturned rostrum.
  • Eyes joined dorsally.
  • Pereopod 7 much longer than pereopod 6.
  • Ramus of third uropod scarcely longer than peduncle.
  • Telson small and entire.

Additional information

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Bibliography

  1. Englisch, U., Coleman, C.O. & W├Ągele, J.W., 2003. First observations on the phylogeny of the families Gammaridae, Crangonyctidae, Melitidae, Niphargidae, Megaluropidae and Oedicerotidae (Amphipoda, Crustacea), using small subunit rDNA gene sequences. Journal of Natural History, 37, 2461-2486

  2. Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]

  3. National Biodiversity Network (NBN) Atlas website. Available from: http://www.nbnatlas.org.  Accessed 01 April 2017

  4. Sainte-Marie, B. & Brunel, P., 1983. Differences in life history and success between suprabenthic shelf populations of Arrhis phyllonyx (Amphipoda Gammaridea) in two ecosystems of the Gulf of St. Lawrence. Journal of Crustacean Biology, 3, 45-67

Citation

This review can be cited as:

Barnes, M.K.S. 2008. Arrhis phyllonyx Sea piglet. In Tyler-Walters H. and Hiscock K. (eds) Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. Available from: http://www.marlin.ac.uk/species/detail/73

Last Updated: 22/05/2008