- Rachiosoma rubiesensis (LAMBERT, 1927)
- Radiocyphus vilanovae (COTTEAU, 1891)
- Reboulicidaris rebouli (VADET & NICOLLEAU, 2005)
- Rhabdocidaris cortazari (COTTEAU, 1879)
- Rhabdocidaris nobilis (MÜNSTER in GOLDFUSS, 1826)
- Rhabdocidaris aff. tuberosa (A. GRAS, 1848)
- Rhabdocidaris ? sp. - Aptiense
- Rhyncholampas carolinensis (TWITCHELL, 1915)
- Rhyncholampas conradi (CONRAD, 1850)
- Rhyncholampas ericsoni (FISCHER, 1951)
- Rhyncholampas evergladensis (MANSFIELD, 1932)
- Rhyncholampas georgiensis (TWITCHELL, 1915)
- Rhyncholampas georgiensis globosus (FISCHER, 1951)
- Rhyncholampas gouldii (BOUVE, 1846)
- Rhyncholampas (Plagiopygus) grignonensis (DEFRANCE, 1825)
- Rhyncholampas cf. macari (SMISER, 1935)
- Rhyncholampas sabistonensis (KELLUM)
- Rhynchopygus savini (COTTEAU, 1894)
- Rispolia subtrigonata (CATULLO, 1827)
- Rolliericidaris mauritanicus (JEANNET, 1937)
- Rostrogalerus rostratus (DESOR, 1842)
- Rotuloidea fimbriata (ETHERIDGE, 1872)
- Roweaster laxoporus (d'ORBIGNY, 1854)
- Roweaster michelini (AGASSIZ, 1847)