Cotylosauria Fossil Age Ranges (319–252 Ma)

Temporal ranges of 98 cotylosaur species from Late Carboniferous to Late Permian, with specimen occurrence counts.
# Stereorhachis_dominans (302 :293.5)
1 Archaeothyris_florensis (309:303.7)
2 Ophiacodon_uniformis (296:290.5) (292.5:291) (291:288.5) (291:287.5) (291:287.5) (291:287.5) (287.5:286.5) (287.5:286.5) (286.5:283) (283.3:279) (279.0:277)
3 Ophiacodon_mirus (303.4:298.9) (290.3:288) (290.3:288) (290.3:288) (290.3:288) (290.3:288) (290.3:288) (290.3:288)
4 Ophiacodon_navajovicus (303.7:298.9) (303.7:298.9) (303.7:298.9) (303.7:298.9) (303.7:298.9) (302:295) (302:295)
5 Ophiacodon_hilli (293.5:290.5)
6 Ophiacodon_retroversus (295.5:291) (292.5:291) (292.5:291) (291:288.5) (291:287.5) (291:287.5) (291:287.5) (287.5:286.5) (287.5:286.5) (287.5:286.5) (287.5:286.5) (279.0:277)
7 Ophiacodon_major (292.5:291) (287.5:286.5) (284:283) (284:283) (286.5:283) (286.5:283) (279.0:277)
8 Echinerpeton_intermedium (309:303.7)
9 Varanosaurus_acutirostris (283:280) (283:280) (293.5:291) (288.5:286.5)
10 Milosaurus_mccordi (303.4:298.9)
11 Stereophallodon_ciscoensis (297.5:295.5)
12 Baldwinonus_trux (303.7:298.9)
13 Ianthasaurus_hardestii (305:303.4)
14 Glaucosaurus_megalops (286.5:283)
15 Gordodon_kraineri (301.5:295)
16 Lupeosaurus_kayi (295.5:292.5) (291:287.5)
17 Edaphosaurus_novomexicanus (303.7:298.9) (301.5:295) (298.9:293.5) (298.9:293.5)
18 Edaphosaurus_colohistion (303.5:302) (303.5:302)
19 Edaphosaurus_boanerges (299:298.0) (299:298.0) (298.0:297.0) (298.0:297.0) (298.0:297.0) (298.0:297.0) (295.5:291) (293.5:291) (293.5:286) (291:288.5) (288.5:286.5)
20 Edaphosaurus_pogonias (283:280) (283:280) (279.0:277)
21 Edaphosaurus_cruciger (297.0:293.5) (297.0:293.5) (297.0:293.5) (297.0:293.5) (284:283.0) (279.0:277)
22 Haptodus_garnettensis (305:303.4)
23 Haptodus_grandis (299:295)
24 Haptodus_baylei (289:296.5)
25 Pantelosaurus_saxonicus (299:296)
26 Cutleria_wilmarthi (299:290)
27 Ianthodon_schultzei (305:303.4)
28 Secodontosaurus_obtusidens (291:287.5) (291:287.5) (291:287.5) (291:287.5) (287.5:286.5) (287.5:286.5) (287.5:286.5) (286.5:283) (283:280)
29 Cryptovenator_hirschbergeri (302:297.5)
30 Sphenacodon_ferox (303.7:298.9) (303.7:298.9) (303.7:298.9) (303.7:298.9) (303.7:298.9) (303.7:298.9) (303.7:298.9) (301.5:295) (300:287.0) (298.9:293.5) (295:287.0) (295:287.0)
31 Sphenacodon_ferocior (300:298.9) (300:287.0) (300:287.0) (300:287.0) (295:287.0) (295:286.5)
32 Ctenospondylus_casei (295:286.5) (287.5:286.5)
33 Ctenospondylus_ninevehensis (297.0:293.5)
34 Ctenorhachis_jacksoni (287.5:286.5)
35 Dimetrodon_milleri (292.5:291) (291:287.5)
36 Dimetrodon_limbatus (300:287.0) (295.5:291) (293.5:286) (292.5:291) (291:287.5) (286.5:284) (286.5:283) (283:280.0) (283.3:279) (279.0:277) (279.0:277)
37 Dimetrodon_grandis (283:280) (283:280) (279.0:277)
38 Dimetrodon_borealis (288:283.3)
39 Dimetrodon_natalis (291:288.5) (291:287.5) (286.5:284) (283:280)
40 Dimetrodon_booneorum (291:287.5) (287.5:286.5)
41 Dimetrodon_dollovianus (283:280) (279.0:277)
42 Dimetrodon_giganhomogenes (283:280) (280:278) (280:278) (280:278) (280:278) (280:278) (280:278) (280:278) (280:278) (280:278) (280:278) (279.0:277) (278:275)
43 Dimetrodon_macrospondylus (287.5:286.5) (279.0:277)
44 Dimetrodon_loomisi (283:280) (283:280) (279:275.0)
45 Dimetrodon_angelensis (275:273.5) (275:273.5)
46 Dimetrodon_occidentalis (300:287.0) (300:287.0)
47 Dimetrodon_teutonis (293:290.0) (293:290.0)
48 Tetraceratops_insignis (283:280)
49 Other_therapsids S273
50 Mesosaurus_tenuidens (295:283.5) (295:283.5) (295:283.5) (295:283.5) (295:283.5) (295:283.5) (295:283.5) (295:283.5) (295:283.5)
51 Stereosternum_tumidum (295:283.5) (295:283.5) (295:283.5) (295:283.5)
52 Brazilosaurus_sanpauloensis (295:283.5) (295:283.5) (295:283.5) (295:283.5)
53 Milleretta_rubidgei (268.8:257) S268.8
54 Broomia_perplexa (265.1:259.8) S268.8
55 Millerosaurus_nuffieldi (268.8:257) S268.8
56 Milleropsis_pricei (254.2:252.2) S268.8
57 Millerosaurus_ornatus (254.2:252.2) S268.8
58 Eunotosaurus_africanus (265.1:259.8) S268.8
59 Acleistorhinus_pterioticus (275:272.3)
60 Eudibamus_cursoris (287:280)
61 Bolosaurus_striatus (287:283)
62 Bolosaurus_grandis (275:274)
63 Belebey_chengi (272:260) S268.8
64 Belebey_maximi (270:268.8)
65 Belebey_vergrandis (270:268.8)
66 Procolophonia S268.8
67 Thuringothyris_mahlendorffae (290.1:279.3)
68 Concordia_cunninghami (287:280)
69 Rhiodenticulatus_heatoni (300:295)
70 Romeria_texana (290.1:287)
71 Romeria_prima (294:290.1)
72 Reiszorhinus_olsoni (281:276)
73 Protocaptorhinus_pricei (285:283)
74 Saurorictus_australis (259.8:254.2) S268.8
75 Captorhinus_magnus (275:274)
76 Captorhinus_aguti (275:274)
77 Captorhinus_laticeps (283:280) (280:276)
78 Captorhinikos_chozaensis (274:272.3) (274:272.3)
79 Captorhinikos_parvus (276:272.3)
80 Captorhinikos_valensis (274:273)
81 Labidosaurus_hamatus (275:274)
82 Labidosaurikos_meachami (275:272.3)
83 Moradisaurus_grandis (298.9:252.2) S268.8
84 Rothianiscus_multidonta (272.3:270)
85 Rothianiscus_robusta (270:267) S268.8
86 Gansurhinus_qingtoushanensis (272:260) S268.8
87 Brouffia_orientalis (310:307)
88 Paleothyris_acadiana (310:307)
89 Hylonomus_lyelli (319:317)
90 Cephalerpeton_ventriarmatum (309.5:308) (308.5:307)
91 Protorothyris_morani (298:284)
92 Protorothyris_archeri (294:290.1)
93 Anthracodromeus_longipes (308.5:307)
94 Petrolacosaurus_kansensis (305:303.7) (305:303.7) (305:303.7) (305:303.7) (305:303.7) (305:303.7) (305:303.7) (305:303.7)
95 Araeoscelis_gracilis (277:274)
96 Spinoaequalis_schultzei (304:301)
97 Eosuchia S268.8
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