Grapsus
Lamarck, 1801
lightfoot crabs
Grapsus is a of lightfoot crabs in the Grapsidae, comprising eight recognized distributed across tropical and subtropical rocky shorelines. Members are characterized by their flattened bodies and long, slender legs adapted for rapid movement across intertidal rocks. The genus has been extensively studied for mitochondrial architecture and phylogenetic relationships within the Grapsoidea superfamily.
Habitat
Rocky shore intertidal , typically found in rock crevices or under rocks at low tide. occupy marine coastal environments with hard substrates.
Distribution
Tropical and subtropical regions including the eastern Atlantic coastline, Macaronesian archipelagos, islands of Ascension and Saint Helena, Indian Ocean, and coastal areas of China including Guangdong, Fujian, Zhejiang, and Shandong provinces.
Ecological Role
Has been observed to play a role in and shoreline dynamics.
Similar Taxa
- MetopograpsusBoth belong to Grapsidae and share rocky intertidal ; distinguished by morphological and genetic differences in mitochondrial gene arrangement
- PlagusiidaePhylogenetic analyses identify Plagusiidae as the closest to Grapsidae, with which Grapsus shares conserved mitochondrial gene patterns
More Details
Etymology
The name 'Grapsus' is a New Latin modification of Greek 'grapsaios', meaning 'crab'.
Mitochondrial genome
Complete mitochondrial have been sequenced for multiple including G. adscensionis (15,553 ) and related ; characterized by strong AT (~70%), 13 -coding genes, 22 tRNAs, two rRNAs, and a control region. Gene arrangement is mostly conserved with the ancestral pattern.