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Hyastenus sp

(White, 1847)
                                                                    

Decorator crab      

Artur Palau (2014)                                                                                                            

 

 

Fact Sheet

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Summary


Physical Description


Ecology


Life History & Behaviour


Evolution & Systematics


Biogeographic Distribution


Conservation & Threats


References & Links

Summary

 

Hyastenus is a genus of crab that belongs to the family Epialtidae also known as spider crabs, due to their physical resemblance to spiders (Ng et al., 2008). This genus includes 38 species (Ng et al., 2008) which are mostly herbivores and generally decorate themselves with different materials that are available in their environment (Wicksten, 1993; Stachowicz and Hay, 1999; Stachowicz and hay, 2000).

Spider crabs of the family Epialtidae have a pyriform carapace, which is wider than it is long with several spines protruding from the dorsal surface. The carapace protrudes anteriorly, forming a distinct rostrum (Ng et al., 2008).

The carapace is commonly covered by pieces of algae or invertebrates, which gives them the popular name “Decorator crab”. This distinct behavior of masking themselves may be a strategy of defense against predators or may be related to food stock (Wicksten, 1993).


                        

  Photo: Artur Palau, 2012

 

 

 

Classification

Minimize
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Hyastenus diacanthus bituberculatus (Lanchester, 1900)
Pisa aries (Latreille, 1825)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Halimus borradailei (Rathbun, 1907)

Common Names

ボラダイルツノガニ
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Hyastenus tuberculosus (Rathbun, 1916)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Common Names

アワツブツノガニ
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Pisa diacanthus (De Haan, 1839)

Common Names

ツノガニ
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Common Names

マルツノガニ
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Halimus espinosus (Borradaile, 1903)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Halimus hendersoni (Laurie, 1906)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Halimus inermis (Rathbun, 1911)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Halimus kyusyuensis (Yokoya, 1933)

Common Names

キュウシュウツノガニ
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Pisa planasius (Adams & White, 1848)
Pisa planasius (White, 1847)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Cancer pleione (Herbst, 1803)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Hyastenus oryx (A. Milne-Edwards, 1872)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Pisa sinope (Adams & White, 1848)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus

Synonyms

Hyastenus trispinosus (Rathbun, 1916)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Superfamily
Majoidea
Family
Epialtidae
Genus
Hyastenus