Raninoida is a taxonomic section of the crabs, containing a single extant superfamily, Raninoidea, and two extinct, Necrocarcinoidea and Palaeocorystoidea. This group of crabs is unlike most, with the abdomen not being folded under the thorax. As of 2009, it comprised 46 extant species, and nearly 200 species known only from fossils.
Classification
Below is a cladogram showing Raninoidea's placement within Brachyura:
The following subgroups are contained in section Raninoida:
- Superfamily Raninoidea <small>De Haan, 1839</small>
- Family Lyreididae <small>Guinot, 1993</small>
- Family Raninidae <small>De Haan, 1839</small>
- Superfamily â Necrocarcinoidea <small>Förster, 1968</small>
- Family â Camarocarcinidae <small>Feldmann, Li & Schweitzer, 2007</small>
- Family â Cenomanocarcinidae <small>Guinot, Vega & Van Bakel, 2008</small>
- Family â Moravocarcinidae <small>Van Bakel, Fraaije, Jagt & Skupien, 2020</small>
- Family â Necrocarcinidae <small>Förster, 1968</small>
- Family â Orithopsidae <small>Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003</small>
- Family â Paranecrocarcinidae <small>Fraaije, Van Bakel & Jagt & Artal, 2008</small>
- Superfamily â Palaeocorystoidea <small>LÃ
Ârenthey in LÃ
Ârenthey & Beurlen, 1929</small>
- Family â Palaeocorystidae <small>LÃ
Ârenthey in LÃ
Ârenthey & Beurlen, 1929</small>
References