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Leach, 1817

Description:
Carapace appreciably narrowed anteriorly, surface and limbs with numerous small hook-setae often covered with encrusting growths of epifauna, frontal region produced into a narrow U-shaped, acute rostrum, each protogastric region with a tubercle; second and third peduncular segments of antenna slender; eyestalks totally visible in dorsal aspect. Second pereiopods thicker and longer than others. Female chelipeds small.
Male chelipeds much larger than in female, propodus long and slightly inflated, a truncate process sometimes present on inner margin of dactylus; sternum with a conspicuous tubercle.

Size:
Carapace length up to 21 (30) mm.

Habitat:
Depth range from lower shore (low water springtide) to about 165 metres on stone and shell substrates, less frequently on muddy sand; also on Modiolus beds to, Reported in Area from. Ovigerous crabs and larvae throughout year.

Colour:
Carapace greyish or yellowish brown, chelipeds and pereiopods lighter.

Distribution:
Shetland, Sutherland, Viking, Orkney, Aberdeen, East Channel, Wight, Portland, Channel Isles, Plymouth, Bristol Channel, Isle of Man, Belfast, Clyde & Argyll, Galway Bay, Fastnet.

Inachus leptochirus