PBDB Taxon

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Diadectomorpha

Taxonomy

Diadectomorpha was named by Watson (1917).

It was replaced with Diadectiformes by Hay (1930); it was reranked as the superfamily Diadectomorpha by Kuhn (1946); it was reranked as the order Diadectomorpha by Huene (1954), Kuhn (1966); it was reranked as the unranked clade Diadectomorpha by Laurin and Reisz (1995), Kissel and Lehman (2002), Martens et al. (2005).

It was assigned to Diadecta by Olson (1947); to Reptiliomorphoidea by Huene (1954); to Cotylosauria by Kuhn (1946), Colbert (1946), Price (1947), Haughton and Brink (1954), Romer (1956), Lewis and Vaughn (1965); to Cotylosauria by Kuhn (1966); to Anthracosauria by Gauthier et al. (1989); to Cotylosauria by Gauthier et al. (1988), Laurin and Reisz (1995), Kissel and Lehman (2002); and to Reptilia by Martens et al. (2005).

Subtaxa

Diadectidae (syn. Nothodontidae), Diadectoidea (syn. Diadecta), Limnoscelidae, Limnoscelops, Limnoscelops longifemur, Millerinidae, Tseajaiidae

Sister taxa

Diadectoidea (syn. Diadecta)

Synonyms

Limnoscelops longifemur was named by Lewis and Vaughn (1965). Its type specimen is MCZ 2984, a partial skeleton (elements of skull, vertebral column and limbs), and it is a 3D body fossil. Its type locality is Placerville Localities 7-10, which is in a Wolfcampian fluvial-lacustrine siliciclastic/conglomerate in the Cutler Formation of Colorado.

It was considered a nomen dubium by Wideman et al. (2005).
Limnoscelops was named by Lewis and Vaughn (1965). It is not extant.

It was considered a nomen dubium by Wideman et al. (2005).

It was assigned to Limnoscelidae by Lewis and Vaughn (1965), Carroll (1988).

Synonymy list

Year	Name and author
1917	Diadectomorpha Watson
1946	Diadectomorpha Colbert p. 237
1946	Diadectomorpha Kuhn p. 55
1947	Diadectomorpha Olson p. 45
1947	Diadectomorpha Price pp. 10, 19
1954	Diadectimorpha Haughton and Brink p. 3
1954	Diadectomorpha Huene p. 20
1956	Diadectomorpha Romer p. 483
1965	Diadectomorpha Lewis and Vaughn p. C13
1965	Limnoscelops Lewis and Vaughn p. C21 fig. 9
1965	Limnoscelops longifemur Lewis and Vaughn p. C27
1966	Diadectomorpha Kuhn p. 15
1988	Limnoscelops Carroll
1988	Diadectomorpha Gauthier et al. p. 139 fig. 4.3
1989	Diadectomorpha Gauthier et al. p. 340
1995	Diadectomorpha Laurin and Reisz p. 172 fig. 2
2002	Diadectomorpha Kissel and Lehman p. 533
2005	Diadectomorpha Martens et al.

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()

Rank	Name	Author
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Diadectomorpha	(Watson 1917)
—	Diadectomorpha	(Watson 1917)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Unr. †Diadectomorpha Watson 1917

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Fm. †Diadectidae Cope 1880

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G. †Alveusdectes Liu and Bever 2015

†Alveusdectes fenestratus Liu and Bever 2015

G. †Ambedus Kissel and Reisz 2004

†Ambedus pusilus Kissel and Reisz 2004

G. †Animasaurus Case and Williston 1912

G. †Bolbodon Cope 1896

†Bolbodon tenuitectus Cope 1896

G. †Chilonyx Cope 1883

†Chilonyx rapidens Cope 1878

G. †Desmatodon Case 1908

†Desmatodon hesperis Vaughn 1969

†Desmatodon hollandi Case 1908

G. †Diadectes Cope 1878

†Diadectes absitus Berman et al. 1998

†Diadectes alatus Cope 1878

†Diadectes carinatus Case and Williston 1912

†Diadectes cretin Case 1911

†Diadectes fissus Cope 1883

†Diadectes lentus Marsh 1878

†Diadectes molaris Cope 1878

†Diadectes sideropelicus Cope 1878

Invalid names: Diadectes biculminatus Cope 1896 [synonym], Diadectes latibuccatus Cope 1878 [synonym], Diadectes phaseolinus Cope 1880 [synonym], Diadectes rapidens Cope 1878 [synonym], Empedias alatus Cope 1878 [synonym], Empedias fissus Cope 1883 [synonym], Empedocles molaris Cope 1878 [synonym], Helodectes isaaci Cope 1880 [synonym], Helodectes paridens Cope 1880 [synonym]

†Diadectes tenuitectes Cope 1896

Invalid names: Diadectes huenei Broom 1914 [synonym], Diadectes maximus Case 1910 [synonym], Diadectoides cretin Case 1911 [synonym]

†Diadectes tenuitectus Cope 1896

†Diadectes zenos Case 1910

Invalid names: Empedocles Cope 1878 [synonym], Nothodon Marsh 1878 [synonym], Silvadectes Kissel 2010 [nomen nudum]

G. †Diadectoides Case 1911

G. †Diasparactus Case 1910

G. †Empedias Cope 1883

G. †Ichniotherium Pohlig 1892

†Ichniotherium cottae Pohlig 1885

†Ichniotherium gilmorei Haubold 1971

†Ichniotherium sphaerodactylum Pabst 1895

G. †Oradectes Kissel 2010

†Oradectes sanmiguelensis Lewis and Vaughn 1965

G. †Orobates Berman et al. 2004

†Orobates pabsti Berman et al. 2004

G. †Phanerosaurus Meyer 1860

†Phanerosaurus naumanni Meyer 1860

Invalid names: Nothodontidae Marsh 1878 [synonym]

Subor. †Diadectoidea Romer 1956

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Fm. †Stephanospondylidae Stappenbeck 1905

G. †Stephanospondylus Stappenbeck 1905

†Stephanospondylus pugnax Geinitz and Deichmüller 1882

Invalid names: Diadecta Olson 1947 [synonym], Korynichniidae Lotze 1928 [empty]

Fm. †Limnoscelidae Williston 1911

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G. †Limnoscelis Williston 1911

†Limnoscelis dynatis Berman and Sumida 1990

†Limnoscelis paludis Williston 1911

G. †Limnostygis Carroll 1967

†Limnostygis relictus Carroll 1967

Fm. †Tseajaiidae Vaughn 1964

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G. †Tseajaia Vaughn 1964

†Tseajaia campi Vaughn 1964

Invalid names: Limnoscelops Lewis and Vaughn 1965 [nomen dubium], Limnoscelops longifemur Lewis and Vaughn 1965 [nomen dubium], Millerinidae Broom 1938 [empty]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

brackish, freshwater, terrestrialuc

Locomotion:

actively mobilec

Created:

2017-04-17 15:15:19

Modified:

2017-04-17 15:15:19

Source: c = class, subp = subphylum, uc = unranked clade

References: Hendy et al. 2009, Carroll 1988

Age range: base of the Westphalian C to the top of the Wuchiapingian or 314.60000 to 254.14000 Ma

Collections (80 total)

Time interval	Ma	Country or state	Original ID and collection number
Westphalian C - Westphalian D	314.6 - 307.4	Canada (Nova Scotia)	Limnostygis relictus (80111)
Missourian	306.0 - 303.7	USA (Pennsylvania)	Desmatodon hollandi (180937)
Missourian	306.0 - 303.7	USA (Colorado)	Limnoscelis dynatis (77786) Limnoscelis dynatis, Desmatodon hesperis (180938)
Virgilian	303.7 - 298.9	USA (New Mexico)	Limnoscelis paludis, Diasparactus zenos, Desmatodon hollandi (34761)
Virgilian	303.7 - 298.9	USA (Oklahoma)	Diasparactus zenos (13947)
Virgilian	303.7 - 298.9	USA (Kansas)	Diasparactus sp. (215555)
Gzhelian - Sakmarian	303.7 - 290.1	USA (New Mexico)	Diadectes sp. (180989)
Virgilian - Wolfcampian	303.7 - 286.0	USA (New Mexico)	Limnoscelis sp., Diadectes sp. (77412)
Asselian	298.9 - 293.52	USA (Texas)	Diadectes sp. (173721 207496)
Asselian	298.9 - 293.52	USA (Nebraska)	Diadectidae indet. (179620)
Asselian	298.9 - 293.52	Germany (Saxony)	Phanerosaurus naumanni (180950)
Asselian	298.9 - 293.52	Germany (Thuringia)	Ichniotherium cottae (180765)
Asselian - Sakmarian	298.9 - 290.1	USA (Utah)	Limnoscelidae indet. (13257)
Asselian - Sakmarian	298.9 - 290.1	USA (Texas)	Diadectes sp. (11165)
Wolfcampian	298.9 - 286.0	USA (Oklahoma)	Diadectes sp. (28394)
Wolfcampian	298.9 - 286.0	USA (Texas)	Diadectes sideropelicus (180957 180978)
Wolfcampian	298.9 - 286.0	USA (New Mexico)	Diadectes lentus (80833 180106 180383 180384 180940) Diadectes sp. (85436 180382 180974 181075) Diadectidae indet. (28067) Diasparactus zenos (80130) Tseajaia campi (171346)
Wolfcampian	298.9 - 286.0	USA (Colorado)	Animasaurus carinatus (180939) Diadectes sanmiguelensis (85481) Limnoscelops longifemur (85475 85479)
Wolfcampian - Leonardian	298.9 - 274.4	USA (Utah)	Diadectes sp., Tseajaia campi (80110)
Permian	298.9 - 251.902	USA (Oklahoma)	Diadectes sp. (221391)
Sakmarian	293.52 - 290.1	Canada (Prince Edward Island)	Diadectes sp. (237230) Diadectidae indet. (237229)
Sakmarian	293.52 - 290.1	Germany (Saxony)	Phanerosaurus pugnax (52522)
Sakmarian	293.52 - 290.1	USA (Texas)	Diadectes latibuccatus (28124) Diadectes sp. (28125)
Sakmarian	293.52 - 290.1	USA (Ohio)	Ambedus pusilus (80877)
Sakmarian - Artinskian	293.52 - 283.3	USA (New Mexico)	Diadectes sp. (180988)
Sakmarian - Artinskian	293.52 - 283.3	USA (Texas)	Diadectes phaseolinus, Empedias molaris (28324)
Artinskian	290.1 - 283.3	Germany (Thuringia)	Diadectes absitus, Orobates pabsti, Ichniotherium cottae (80112)
Artinskian	290.1 - 283.3	USA (Texas)	Diadectes latibuccatus, Diadectes phaseolinus, Empedias molaris (108766) Diadectes sideropelicus (84716) Diadectes sideropelicus, Diadectes biculminatus, Empedias alatus (28142) Diadectes sp. (13080 28143 28145 28146 28147 28148 28149 28238 28240) Diadectes sp., Empedias fissus (28150)
Artinskian - Kungurian	290.1 - 274.4	USA (Texas)	Diadectes sp. (28241 85301) Diadectes sp., Chilonyx rapidens (28252) Diadectes sp., Helodectes isaaci, Helodectes paridens (28253)
Artinskian - Kungurian	290.1 - 274.4	USA (Oklahoma)	Diadectes sp. (85733)
Artinskian - Roadian	290.1 - 266.9	USA (Texas)	Diadectes sp. (180992)
Leonardian	286.0 - 274.4	USA (Texas)	Diadectes sp. (68171)
Leonardian	286.0 - 274.4	USA (Oklahoma)	Diadectes sp. (180990 180991)
Kungurian	283.3 - 274.4	USA (Texas)	Bolbodon tenuitectes, Diadectes huenei (28256) Chilonyx rapidens (28251) Diadectes sp. (28264 28267 28272 28273 67735 178738) Diadectes sp., Diadectoides cretin (28275)
Rotliegendes	283.3 - 259.51	Poland (Lower Silesia)	Ichniotherium cottae (197201)
Wuchiapingian	259.51 - 254.14	China (Henan)	Alveusdectes fenestratus (171025)
Lopingian	259.51 - 251.902	Italy (Trentino-Alto Adige)	Ichniotherium cottae (188750)