Atelecyclus

Atelecyclus is a genus of crabs belonging to the family Atelecyclidae. These crabs are found in marine environments, primarily in the Pacific and Indian Oceans. The defining characteristics of Atelecyclus crabs include their flattened, circular or oval carapace and their typically burrowing lifestyle in sandy or muddy substrates. They are generally small to medium-sized crabs.

The genus Atelecyclus comprises several species, each with its own specific geographic distribution and subtle morphological differences. Taxonomic classification within the Atelecyclidae can be complex and subject to ongoing scientific research, but key features used for identification include carapace shape and ornamentation, the structure of the chelipeds (claws), and the arrangement of teeth on the anterolateral margins of the carapace.

Atelecyclus crabs are often important components of benthic (seafloor) ecosystems. Their burrowing activities contribute to bioturbation, the mixing of sediments, which can affect nutrient cycling and the distribution of other marine organisms. They feed on a variety of detritus and small invertebrates, playing a role in the food web. More detailed ecological studies on the various species within the genus Atelecyclus are needed to fully understand their specific roles in their respective habitats.