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Archaeoparadoxia weltoni

Mammalia - Perissodactyla - Paleoparadoxiidae

Taxonomy
Paleoparadoxia weltoni was named by Clark (1991). Its type specimen is UCMP 114285, a partial skeleton, and it is a 3D body fossil. Its type locality is Skooner Gulch I, which is in an Aquitanian marine sandstone in the Skooner Gulch Formation of California. It is the type species of Paleoparadoxia.

It was recombined as Archaeoparadoxia weltoni by Barnes (2013), Matsui (2017), Matsui and Tsuihiji (2019).

Synonymy list
YearName and author
1991Paleoparadoxia weltoni Clark p. 494 figs. Fig. 2-5
1996Paleoparadoxia weltoni Domning p. 395
2008Paleoparadoxia weltoni Domning p. 643
2013Archaeoparadoxia weltoni Barnes p. 57
2017Archaeoparadoxia weltoni Matsui p. 4
2019Archaeoparadoxia weltoni Matsui and Tsuihiji

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
RankNameAuthor
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
orderDesmostylia
orderDesmostyloideaAbel 1933
familyPaleoparadoxiidae()
genusArchaeoparadoxia
speciesweltoni()

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.

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Diagnosis
ReferenceDiagnosis
L. G. Barnes 2013A species of the subfamily Paleoparadoxiinae having comparatively small adult body size; comparatively gracile limb bones; mandibular dental formula i3, c, p1-4, m1-3; lower incisor crowns not extremely flattened dorsoventrally and not expanded transversely; differing from species of Paleoparadoxia and Neoparadoxia by having transverse processes on thoracic vertebrae directed laterally rather than inclined dorsolaterally, and by not having lateral
projection of proximal end of fifth metacarpal; and differing from all other species of Paleoparadoxiidae by having enlarged paraconid on p4, and by lacking hypoconulid on m3.