Polybius navigator

Polybius navigator is a species of crab in the family Polybiidae.^[2][1]

Polybius navigator
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Infraorder:	Brachyura
Family:	Polybiidae
Genus:	Polybius
Species:	P. navigator
Binomial name
Polybius navigator (Herbst, 1794)
Synonyms [1]
Cancer depuratoides Nardo, 1847 Cancer navigator Herbst 1794 Liocarcinus arcuatus (Leach, 1814) Liocarcinus navigator (Herbst, 1794) Marcopipus arcuatus (Leach, 1814) Polybius arcuatus (Leach, 1814) Portunus arcuatus Leach, 1814 Portunus emarginatus Leach, 1814 Portunus guttatus Risso, 1816

Distribution

Polybius navigator is found chiefly around the British Isles; its range covers the northeast Atlantic Ocean, including the North Sea as far north as Trøndelag in Norway, and as far south as Mauritania, and it also occurs in the Mediterranean Sea.^[3][4]

Description

Polybius navigator has a dark brown carapace up to approximately 33 millimetres (1.3 in) wide,^[3] with lighter pereiopods.^[5] The frontal margin of the carapace, between the eyes, has a fringe of hair but no spines.^[3][5]

Subspecies

Two subspecies are recognised:^[1]

• Polybius navigator navigator (Herbst, 1794)
• Polybius navigator rondeletii (Risso, 1816)