Palicidae
Palicidae is a family of deep-sea crabs belonging to the infraorder Brachyura, commonly known as “spider crabs.” These crabs are characterized by their long, slender legs, which resemble those of spiders. They are primarily found in the benthic zone of the deep sea, dwelling on the seafloor.
Common Names
Members of the Palicidae family are often referred to as "spider crabs" due to their long, spindly legs. Some species may have more specific common names depending on their morphology and location.
Characteristics
Palicidae crabs are distinguished by a number of unique features:
- Long, slender legs: The most prominent feature of these crabs, giving them their spider-like appearance.
- Small, flattened carapace: The carapace, or shell, is relatively small compared to the size of the legs.
- Reduced or absent chelipeds: The chelipeds, or claws, are often small or even absent in some species.
- Spiny exoskeleton: The body and legs are covered in spines or tubercles, which may provide camouflage or defense.
Environment
Palicidae crabs are exclusively deep-sea dwellers, inhabiting the benthic zone of the ocean floor. They are often found in depths ranging from a few hundred to several thousand meters. These crabs are adapted to the harsh conditions of the deep sea, including low temperatures, high pressure, and limited food availability.
References
World Register of Marine Species (WoRMS)
National Center for Biotechnology Information (NCBI)