Raninoida
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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 De Haan, 1839 Family Lyreididae Guinot, 1993 Family Raninidae De Haan, 1839
- Superfamily †Necrocarcinoidea Förster, 1968 Family †Camarocarcinidae Feldmann, Li & Schweitzer, 2007 Family †Cenomanocarcinidae Guinot, Vega & Van Bakel, 2008 Family †Moravocarcinidae Van Bakel, Fraaije, Jagt & Skupien, 2020 Family †Necrocarcinidae Förster, 1968 Family †Orithopsidae Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003 Family †Paranecrocarcinidae Fraaije, Van Bakel & Jagt & Artal, 2008
- Superfamily †Palaeocorystoidea Lőrenthey in Lőrenthey & Beurlen, 1929 Family †Palaeocorystidae Lőrenthey in Lőrenthey & Beurlen, 1929