Raninidae

Raninidae
Ranina ranina
Systematics
Sub-stem : Crustaceans (Crustacea) Class : Higher crabs (Malacostraca) Order : Decapods (decapoda) Subordination : Pleocyemata Partial order : Crab (Brachyura) Family : Raninidae
Scientific name
Raninidae
De Haan , 1839

The Raninidae are a family of native crabs (Brachyura). In contrast to most other crabs, the greatly reduced abdomen has not folded under the cephalothorax . The scissor bones of the Raninidae and the front three pairs of legs have developed into digging tools with which the animals dig themselves in the sand.

There are over 30 recent species, all of which live in the sand on tropical seashores.

The Raninidae have been known to be fossilized since the Lower Cretaceous Period . In the Tertiary they were very common.

Internal system

In the family, 46 recent and 183 extinct species are recorded in 34 genera and seven subfamilies:

Lyreidus tridentatus

• Subfamily Cyrthorhininae
  • Cyrtorhina
• Subfamily Lyreidinae
  • † Hemioon
  • † Lyreidina
  • Lyreidus
  • Lysirude
  • † Rogueus
  • † Macroacaena
  • † Tribolocephalus
• Subfamily Notopodinae
  • Cosmonotus
  • † Eumorphocorystes
  • † Lianira
  • † Lovarina
  • Notopus
  • † Ranidina
  • † Raniliformis
  • Ranilia
  • Umalia
• Subfamily Ranininae
  • † Lophoranina
  • Ranina
  • † Raninella
• Subfamily Raninoidinae
  

  Raninoides spec.
  • † bicornisranina
  • † Cenocorystes
  • † Cristafrons
  • Notopoides
  • Notosceles
  • † Quaslaeviranina
  • Raninoides
• Subfamily Palaeocorystinae
  • † Cretacoranina
  • † Eucorystes
  • † Heus
  • † Notopocorystes
• Subfamily Symethinae
  • Symethis
• incertae sedis
  • † Araripecarcinus
  • † Sabahranina

swell

• Sammy De Grave, N. Dean Pentcheff, Shane T. Ahyong, et al. : A classification of living and fossil genera of decapod crustaceans . In: Raffles Bulletin of Zoology . Suppl. 21, 2009, pp. 1-109.

Web links

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