Dyspanopeus sayi (S. I. Smith, 1869)

Small mud crab
Dyspanopeus_sayi_01 Dyspanopeus_sayi_02

Description 1

Small crab with a convex, hexagonal carapace that is no more than 2 cm wide and smaller in length. The surface is slightly grainy, with a light layer of hair, mainly on the front and sides. Olive green to brown colour. Black nail tips. Large, think, asymmetrical claws, the left being narrower than the right. Marked sexual dimorphism (males are larger).

Biology 1

Active at twilight and night, they prefer to feed on bivalve molluscs. They copulate after molting. Spawn occurs hours or days after copulation, eggs are carried by the female until they hatch (10-16 days). The young crabs hatch as zoea larvae and go through various stages before becoming juvenile crabs.

Habitat 1

Euryhaline and eurythermal species that prefers to live in muddy bottoms and it is very tolerant to temperature and saline changes, being able to easily colonise in shallow coastal areas such as estuaries.

Sources 1

Spanish Catalogue of Exotic Invasive Species and Document sheets of the Exotic Invasive Species Act 630/2013. (GEIB), MAPAMA

Spanish Catalogue of Exotic Invasive Species - Crustaceans 1

http://www.mapama.gob.es/es/biodiversidad/temas/conservacion-de-especies/especies-exoticas-invasoras/ce_eei_crustaceos.aspx

Fuentes y Créditos

  1. Adaptado por INVASORES - administrador de un trabajo de (c) cartotragsatec, algunos derechos reservados (CC BY-SA), http://natusfera.gbif.es/guide_taxa/2002

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