Helice tridens | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Malacostraca |
Order: | Decapoda |
Suborder: | Pleocyemata |
Infraorder: | Brachyura |
Family: | Varunidae |
Genus: | Helice |
Species: | H. tridens
|
Binomial name | |
Helice tridens | |
Synonyms [2] | |
|
Helice tridens is a species of crab which lives on mudflats around the coasts of Japan and the Korean Peninsula. [3]
It is semi-terrestrial, returning to the sea to spawn. [4] The species appears to be adversely affected by the presence of raccoons (Procyon lotor), an invasive predator. [4] H. tridens has a salinity requirement which lies between those of two other estuarine crabs in Japan, Helicana japonica and Chiromantes dehaani. [5]
Smaller individuals shelter in burrows in reed marshes, apparently in order to avoid cannibalism; this may also be the reason for the migration of larger individuals to brackish water lagoons in summer, when the crabs exceed their carrying capacity. [6]
Helice tridens was first described by Wilhem de Haan in an 1835 volume of Fauna Japonica, as Ocypode tridens. [7] The former subspecies H. t. wuana and H. t. sheni are now recognised as a separate species, Helicana wuana. [2]
Helice tridens | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Malacostraca |
Order: | Decapoda |
Suborder: | Pleocyemata |
Infraorder: | Brachyura |
Family: | Varunidae |
Genus: | Helice |
Species: | H. tridens
|
Binomial name | |
Helice tridens | |
Synonyms [2] | |
|
Helice tridens is a species of crab which lives on mudflats around the coasts of Japan and the Korean Peninsula. [3]
It is semi-terrestrial, returning to the sea to spawn. [4] The species appears to be adversely affected by the presence of raccoons (Procyon lotor), an invasive predator. [4] H. tridens has a salinity requirement which lies between those of two other estuarine crabs in Japan, Helicana japonica and Chiromantes dehaani. [5]
Smaller individuals shelter in burrows in reed marshes, apparently in order to avoid cannibalism; this may also be the reason for the migration of larger individuals to brackish water lagoons in summer, when the crabs exceed their carrying capacity. [6]
Helice tridens was first described by Wilhem de Haan in an 1835 volume of Fauna Japonica, as Ocypode tridens. [7] The former subspecies H. t. wuana and H. t. sheni are now recognised as a separate species, Helicana wuana. [2]