Amphithrax
| Amphithrax | |
|---|---|
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| |
| Amphithrax aculeatus | |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| Infraorder: | Brachyura |
| Family: | Mithracidae |
| Genus: | Amphithrax Windsor & Felder, 2017 |
Amphithrax is a genus of saltwater crabs belonging to a group (superfamily Majoidea), often known as spider crabs or decorator crabs.
Description
[edit | edit source]On the iNaturalist page comparing pictures of the various Amphithrax species it is seen that they all share these features:[1]
- spoon-shaped claw tips
- legs armed with tubercles and sometimes hairlike or sharp projections
- the fronts of their carapaces bear various pointed projections, sometimes with those around the eyes particularly developed
Habitat
[edit | edit source]Amphithrax species occur among coral rocks and rubble, beneath sea anemones and in rock crevices in intertidal zones to subtidal zones of up to 60 meters depth (~200 feet).[2]
Range
[edit | edit source]The map registering observations of Amphithrax species at iNaturalist documents the genus's presence in tropical and subtropical waters of the Americas.[3] Amphithra armatus has been recorded in the western Pacific, in Taiwanese waters, as an invasive species.[4]
List of species
[edit | edit source]In 2025, these are the accepted species of the genus Amphithrax:[5]
- Amphithrax aculeatus (Herbst, 1790)
- Amphithrax armatus (de Saussure, 1853)
- Amphithrax bellii (Gerstaecker, 1856)
- Amphithrax besnardi (Melo, 1990)
- Amphithrax braziliensis (Rathbun, 1892)
- Amphithrax caboverdianus (Türkay, 1986)
- Amphithrax clarionensis (Garth, 1940)
- Amphithrax hemphilli (Rathbun, 1892)
- Amphithrax pilosus (Rathbun, 1892)
- Amphithrax tuberculatus (Stimpson, 1860)
- Amphithrax verrucosus (H. Milne Edwards, 1832)
References
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