Macropodia falcifera, commonly known as the “long-spined spider crab”, is a species of crab belonging to the family Inachidae. Found throughout the northeastern Atlantic Ocean, this distinctive crustacean is easily recognizable by its long, spiny legs and its striking appearance.
Description & Characteristics
Macropodia falcifera is a relatively small crab, with a maximum carapace width of around 5 centimeters. Its body is covered in numerous spines, giving it a spiky and intimidating appearance. The most prominent of these spines are located on the front edge of the carapace, where they form a pair of long, pointed horns. The crab’s legs are also exceptionally long, especially the first pair, which are modified into large claws. These claws are used for defense and for capturing prey.
Habitat and Occurrence
Macropodia falcifera is typically found on rocky shores and reefs in the northeastern Atlantic Ocean. It is particularly common in the intertidal zone, where it can withstand the fluctuations of tides and exposure to air. The crab is also found in shallower depths, ranging from the surface down to around 50 meters. Its preferred habitat is in areas with abundant algae and seaweed, which provide food and shelter. Macropodia falcifera is a common sight in the infralittoral zone, which encompasses the area between the lowest low tide mark and the depth at which marine plants no longer grow due to lack of light. Its presence in this marine zone highlights its ability to thrive in both exposed and submerged environments.
Taxonomy
Macropodia falcifera is classified within the Class: Malacostraca, Order: Decapoda, and Family: Inachidae. This classification places the species within the diverse and widespread group of crustaceans that includes crabs, lobsters, and shrimps. The family Inachidae encompasses a variety of spider crabs, which are characterized by their long legs and spiny bodies.
Feeding
Macropodia falcifera is an opportunistic omnivore, feeding on a variety of organisms including algae, seaweed, small invertebrates, and even carrion. It uses its powerful claws to grasp its prey and bring it to its mouth. Its diet and scavenging habits play a crucial role in maintaining the balance of the marine ecosystem.
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