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Polybius pusillus

Species of crab From Wikipedia, the free encyclopedia

Polybius pusillus, common name dwarf swimming crab,[2] is a species of crab in the Portunidae family.[3][1]

Quick facts Scientific classification, Binomial name ...
Polybius pusillus
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Clade: Pancrustacea
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Brachyura
Family: Polybiidae
Genus: Polybius
Species:
P. pusillus
Binomial name
Polybius pusillus
(Leach, 1815)
Synonyms[1]
  • Liocarcinus pusillus (Leach, 1816)
  • Macropipus parvulus (Parisi, 1916) Macropipus pusillus (Leach, 1816)
  • Portunus parvulus (Parisi, 1916) Portunus pusillus (Leach, 1816)
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Description

Polybius pusillus is a small, colourful species with a broad, suboval carapace having a maximum width of 25 mm (1.0 in). However, most specimens are usually less than 20 mm (0.8 in).[3][4] This species occurs in a wide range of colours.[3] The front has three sharpened tusks, directed forward.[2]

Distribution

Polybius pusillus occurs from North-West Africa, to Lofoten, Norway[3][4] including the North Sea.[2] It is found around the shores of: England, in such places as Northumberland, Yorkshire, The Wash, Thames, the eastern English Channel, Isle of Wight, Portland, Plymouth, the Scilly Isles, the Bristol Channel, Liverpool Bay; Scotland - Shetland, Orkney, Firth of Forth, Argyll and Clyde, The Minch; Ireland, occurring in and around Dublin, Belfast, County Mayo, Galway Bay, Fastnet Rock, County Cork; and elsewhere in the British Isles including the Channel Islands, Anglesey and the Isle of Man.[5]

Habitat

Specimens range intertidally up to 100 metres,[4] dwelling on sandy to stony bottoms,[3][5] but prefer gravel or stony substrates.

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