COLORADO
FREMONT COUNTY
NEAR THE TOWN OF HOWARD
IN THE VALLEY OF ARKANSAS RIVER
SANGRE DE CRISTO FORMATION
PROBABLY MISSOURIAN
LOWER STEPHANIAN
UPPER SILESIAN STAGE
KASIMOVIAN EPOCH?
LATE PENNSYLVANIAN
(LATE CARBONIFEROUS)
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
SUBCLASS: LABYRINTHODONTIA OWEN, 1860
Incertae sedis
Gen. sp indet.
SUPERORDER: TEMNOSPONDYLIA ZITTEL, 1887
MICROORDER: EUSKELIA YATES & WARREN, 2000
ORDER: EYROPODIA
Superfamily: DISSOROPHOIDEA Boulenger, 1902 (sensu Bolt, 1969)
Family: AMPHIBAMIDAE Moodie, 1910
MICROORDER: LIMNARCHIA YATES & WARREN, 2000
ORDER: DVINOSAURIA YATES & WARREN, 2000
INFRAORDER: TRIMERORHACHOIDA ROMER, 1947
Superfamily: TRIMERORHACHOIDEA Cope, 1882 (sensu Romer, 1947)
Family: TRIMERORHACHIDAE Cope, 1882
Trimerorhachis sp
NEOTETRAPODA
SUBCLASS: REPTILIOMORPHA SAVE-SODERBERGH, 1934
ORDER: ANTHRACOSAURIA WATSON, 1917
Incertae sedis
Gen. sp indet.
SUBCLASS: LEPOSPONDYLI ZITTEL, 1888
ORDER: AISTOPODA MIALL, 1875
Family: OESTOCEPHALIDAE Anderson, 2003
*Coloraderpeton boilli
ORDER: MICROSAURIA DAWSON, 1863
SUBORDER: TUDITANOMORPHA CARROLL & GASKILLL, 1978
Family: TRIHECATONTIDAE Vaughn, 1972
*Trihecaton howardinus
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: PARAREPTILIA OLSON 1947
INFRACLASS: SAUROPSIDA HUXLEY, 1864
ORDER: COTYLOSAURIA COPE, 1880
SUBORDER: DIADECTOMORPHA Watson, 1917
Family: DIADECTIDAE Cope, 1880
*Desmatodon hesperis
Family: LIMNOSCELIDAE Williston, 1911
*Limnoscelis dynatis
SUBCLASS: SYNAPSIDA OSBORN, 1903
ORDER: PELYCOSAURIA COPE, 1878
Incertae sedis
Xyrospondylus ecordi
= Edaphosaurus ecordiSUBORDER: EUPELYCOSAURIA KEMP, 1982
INFRAORDER: OPHIACHODONTIA NOVA
Family: OPHIACODONTIDAE Nopsca, 1923
Varanosaurus sp
INFRAORDER: EDAPHOSAURA NOVA
Incertae sedis
non Edaphosaurus, E. raymondi
= Naosaurus raymondi
= Ianthasaurus raymondiINFRAORDER: DIMETRODONTOMORPHA emend NOPCSA, 1925
Family: SPHENACODONTIDAE Marsh, 1878
Subfamily: SPHENACODONTINAE Marsh, 1878 (sensu Nopcsa, 1925)
Gen. sp indet.
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