- Paracentrotus lividus (LAMARCK, 1816)
- Paracidaris (P.) florigemma (PHILLIPS, 1829)
- Parapygus cassiduloides (GAUTHIER, 1889)
- Parapygus nanclasi (COQUAND, 1860)
- Parapygus toucasanus (d'ORBIGNY, 1855)
- Parascutella gibbercula (SERRES, 1829)
- Parascuella cf. paulensis (AGASSIZ, 1841)
- Parascutella paulensis (AGASSIZ, 1841)
- Parorthopsis repellini (GRAS, 1849)
- Parorthopsis royoi (LAMBERT, 1935)
- Pedina davoustiana (COTTEAU, 1856)
- Periarchus floridanus (FISCHER, 1951)
- Pericosmus granulosus (HERKLOTS, 1854)
- Pericosmus marianii (AIRAGHI, 1899)
- Pericosmus montevialensis (SCHAUROTH, 1865)
- Pericosmus spatangoides (DESOR, 1853)
- Pericosmus sp. 2
- Perisalenia koenigii (AGASSIZ, in AGASIZ & DESOR, 1847)
- Peronella ova (McNAMARA, 1996)
- Peronella ricta (GREGORY, 1892)
- Petalobrissus cubensis (WEISBORD, 1934)
- Petalobrissus lefebvrei (LAMBERT, 1936)
- Petalobrissus ossoi (FORNER, 2017)
- Petalobrissus setifensis (COTTEAU, 1866)
- Petalobrissus trigonopygus (COTTEAU, 1864)
- Phyllobrissus gresslyi (AGASSIZ, 1839)
- Phyllobrissus kiliani (LAMBERT, 1902)
- Phymechinus mirabilis (AGASSIZ, IN AGASSIZ & DESOR, 1846)
- Phymosoma archiaci (DESOR, 1846)
- Phymosoma aff. hexaporum (LAMBERT, 1927)
- Phymosoma hexaporum (LAMBERT, 1927)
- Phymosoma girumnense (DESOR, 1857)
- Phymosoma inflatum (ARNAUD, 1877)
- Phymosoma loryi (GRAS, 1852)
- Phymosoma aff. magnificum (AGASSIZ, 1840)
- Phymosoma mexicanum (BÖSE, 1910)
- Phymosoma cf. microtuberculatum (COTTEAU, 1860)
- Phymosoma sp. (Coniaciense)
- Phymosoma sp. (Cenomaniense)
- Phymosoma supracoralinum (COTTEAU)
-
Phymosoma texanum (ROEMER, 1836)
- Phymotaxis mansfieldi (COOKE, 1941)
- Pisolampas aff. concinna (PHILIP, 1963)
- Plagiobrissus (Rhabdobrissus) costae (GASCO, 1876)
- Plagiobrissus dixie (COOKE, 1942)
- Plagiochasma cruciferum (MORTON, 1830)
- Plagiochasma olfersi (AGASSIZ, 1836)
- Plagiochasma saurai (FORNER, 2016)
- Plegiocidaris bradfordensis (WRIGHT, 1856)
- Plegiocidaris cervicalis (AGASSIZ, 1840)
- Plegiocidaris coronata (SCHLOTEIM, 1920)
- Plegiocidaris propinqua (MÜNSTER in GOLDFUSS, 1826)
- Plesiocorys (Sternotaxis) heberti (COTTEAU, in COTTEAU & TRIGER, 1860)
- Plesiocorys (Sternotaxis) placenta (AGASSIZ IN AGASSIZ & DESOR, 1847)
- Pleurodiadema aff. stutzi (MOESCH, 1867)
- Pleurosalenia heberti (COTTEUAU, 1861)
- Pleurosalenia maastrichtiensis (SCHLÜTER, 1892)
- Pliolampas (Breynella) vassalli ♀ (WRIGHT, 1855)
- Pliolampas (Breynella) sp.
- Pliotoxaster paquieri (LAMBERT, 1919)
- Pliotoxaster sp.
- Pliotoxaster whitei (CLARK, 1893)
- Politolampas politus (LAMARCK, 1816)
- Polycidaris (Megacidaris) aff. horrida (MERIAN in AGASSIZ, 1840)
- Polycyphus normannus (DESOR, in AGASSIZ & DESOR, 1847)
- Polydiadema karakashi (WEBER, 1934)
- Polydiadema magnificum -
- Polydiadema royeri (COTTEAU, 1882)
- Polydiadema sp. (Aptiense)
- Porosoma atacicum (COTTEAU, 1856)
- Porosoma cribrum (AGASSIZ, 1840)
- Porosoma sp.
- Procassidulus lapiscancri (LESKE, 1778)
- Proescutella brionensis
- Proescutella caillaudi (COTTEAU, 1861)
- Pronucleolites orbicularis (PHILLIPS, 1829)
- Proraster dalli (CLARK, 1891)
- Protocardiaster cotteauanus (d'ORBIGNY, 1855)
- Protocardiaster truncatus (GOLDFUSS, 1829)
- Protoscutella conradi (COTTEAU, 1889)
- Protoscutella aff. tuomeyi (TWITCHELL, 1915)
- Psammechinus carolinensis (KIER, 1997)
- Psammechinus dubius (AGASSIZ, 1840)
- Psammechinus hispaniae (LAMBERT, 1899)
- Psephechinus michelini (COTTEAU in COTTEAU & TRIGER, 1857)
-
Psepechinus serratus (COTTEAU, 1857)
- Psepechinus sp. (POMEL, 1883)
- Pseudananchys algira (COQUAND, 1862)
- Pseudananchys completa (CRAGIN, 1892)
- Pseudechinus albocinctus (HUTTON, 1872)
- Pseudholaster bicarinatus (AGASSIZ, 1847)
- Pseudholaster prestensis (DESOR, in JACCARD, 1869)
- Pseudocidaris clunifera (AGASSIZ, 1840)
- Pseudocidaris mammosa (AGASSIZ, 1840)
- Pseudocidaris precincta (LAMBERT, 1933)
- Pseudodiadema pseudodiadema (LAMBERT, 1816)
- Pseudodiadema cf. seguini (LAMBERT, 1900)
- Pseudogibbaster tercensis (COTTEAU, 1877)
- Pseudoffaster caucasicus (DRU, 1884)
-
Pseudomaretia alta (AGASSIZ, 1863)
- Pseudopedina divionensis (MICHELIN, 1854)
- Pseudosalenia aspera (AGASSIZ, 1838)
- Pygaster semisulcatus (PHILLIPS, 1829)
- Pygaster umbrella (AGASSIZ, 1839)
- Pygaulus desmoulinsii (AGASSIZ in AGASSIZ & DESOR, 1847)
- Pygaulus subaequalis (AGASSIZ, 1847)
- Pygopyrina darderi (LAMBERT, 1935)
- Pygorhynchus aragonensis (COTTEAU, 1889)
- Pygorhynchus montesinosi (COTTEAU, 1889)
- Pygorhynchus romani (LAMBERT, 1904)
- Pygorhynchus royoi (LAMBERT, 1935)
- Pygorhynchus sp. (AGASSIZ, 1839)
- Pygospatangus - ver: Heterobrissus salvae (COTTEAU, 1889)
- Pygurus blumenbachii (KOCH & DUNKER, 1837)
- Pygurus jurensis (MARCOU, 1848)
- Pygurus rostratus (AGASSIZ, 1839)
- Pyrina sp. (DESMOULINS, 1835)
- Pyrina sphaerica (TZANKOV, 1982)