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Osteopygis emarginatus

Reptilia - Testudines

Taxonomy
Osteopygis emarginatus was named by Cope (1868). Its type specimen is AMNH 1485 and is a 3D body fossil. Its type locality is Barnsboro "greensand" (Hornerstown), which is in a Maastrichtian marginal marine horizon in the Hornerstown Formation of New Jersey. It is the type species of Osteopygis.

It was corrected as Osteopygis emarginata by Cope (1870) and Cope (1870).

Synonyms
  • Osteopygis chelydrinus was named by Cope (1868). Its type specimen is AMNH 1131, a partial shell (a figured peripheral and only questionably associated other material), and it is a 3D body fossil. Its type locality is Barnsboro "greensand" (Hornerstown), which is in a Maastrichtian marginal marine horizon in the Hornerstown Formation of New Jersey.

    It was synonymized subjectively with Osteopygis emarginatus by Parham (2005).
  • Osteopygis platylomus was named by Cope (1870). Its type specimen is ANSP specimen, a partial shell (anterior half of one neural most of the suprapygal, a portion of the nuchal, wholes or parts of all the peripherals of the right side, except the fifth, wholes ), and it is a 3D body fossil. Its type locality is Pemberton Marl Company pit (Hornerstown), which is in a Maastrichtian marginal marine marl in the Hornerstown Formation of New Jersey.

    It was synonymized subjectively with Osteopygis emarginatus by Parham (2005).
  • Osteopygis erosus was named by Cope (1875). Its type specimen is AMNH 1130, a partial skeleton (all the peripherals of the left side, except the third, fourth, fifth, and eleventh; the second, fourth, eleventh and half of the ninth of the right side; the f), and it is a 3D body fossil. Its type locality is Barnsboro "greensand" (Hornerstown), which is in a Maastrichtian marginal marine horizon in the Hornerstown Formation of New Jersey.

    It was synonymized subjectively with Osteopygis emarginatus by Parham (2005).
  • Catapleura chelydrina was named by Cope (1875).

    It was synonymized subjectively with Osteopygis emarginatus by Parham (2005).
  • Osteopygis gibbi was named by Wieland (1904). Its type specimen is YPM 783 (Marsh collection), a shell, and it is a 3D body fossil. Its type locality is West Jersey Marl Company's Pit, Barnsboro (New Egypt), which is in a Maastrichtian terrestrial sandstone/marl in the New Egypt Formation of New Jersey.

    It was synonymized subjectively with Osteopygis emarginatus by Parham (2005).
  • Osteopygis robustus was named by Hay (1908). Its type specimen is AMNH 2360, a partial shell (the nuchal, the first and second peripherals of both sides, the tenth and eleventh peripherals of both sides, the fourth costals of both sides, the left fifth, ), and it is a 3D body fossil. Its type locality is Pemberton Marl Company pit (Hornerstown), which is in a Maastrichtian marginal marine marl in the Hornerstown Formation of New Jersey.

    It was synonymized subjectively with Osteopygis emarginatus by Parham (2005).
  • Amblypeza entellus was named by Hay (1908). Its type specimen is State Collection New Jersey No Unknown, a partial shell, and it is a 3D body fossil. It is the type species of Amblypeza.

    It was synonymized subjectively with Osteopygis emarginatus by Parham (2005).
Synonymy list
YearName and author
1868Osteopygis chelydrinus Cope p. 147
1868Osteopygis emarginatus Cope p. 147
1870Osteopygis emarginata Cope
1870Osteopygis platylomus Cope p. 135
1870Osteopygis chelydrinus Cope p. 138
1875Catapleura chelydrina Cope
1875Osteopygis erosus Cope p. 258
1902Osteopygis chelydrinus Hay p. 441
1902Osteopygis emarginatus Hay p. 441
1902Osteopygis erosus Hay p. 441
1902Osteopygis platylomus Hay p. 441
1904Osteopygis gibbi Wieland
1908Amblypeza entellus Hay pp. 122-123 figs. Figs. 125-132
1908Osteopygis emarginatus Hay p. 129 figs. Telt-figs. 134-141
1908Osteopygis gibbi Hay p. 132 figs. Plate 26, fig. 1; plate 27, figs. I, z; text-figs. 142-146
1908Osteopygis robustus Hay p. 134 figs. Figs. 147-151
1908Osteopygis chelydrinus Hay pp. 136-137 figs. Plate 23, figs. 4-7; plate 28, figs. 1-4; text-figs. 152-154
1908Osteopygis erosus Hay pp. 138-139 figs. Plate 26, fig. 2; text-figs. 155-162
1908Osteopygis platylomus Hay p. 146 figs. figs 172-180
1930Amblypeza entellus Hay p. 75
1930Osteopygis chelydrinus Hay p. 76
1930Osteopygis emarginatus Hay p. 76
1930Osteopygis erosus Hay p. 76
1930Osteopygis gibbi Hay p. 76
1930Osteopygis platylomus Hay p. 76
1930Osteopygis robustus Hay p. 76
1953Osteopygis emarginatus Zangerl p. 208
1988Osteopygis emarginatus Weems p. 115
2005Osteopygis emarginatus Parham p. 76
2023Osteopygis emarginatus Gentry et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
—PancryptodiraJoyce et al. 2004
—Macrobaenidae(Sukhanov 1964)
genusOsteopygis
speciesemarginatus

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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Invalid names: Amblypeza entellus Hay 1908 [synonym], Catapleura chelydrina Cope 1875 [synonym], Osteopygis borealis Wieland 1904 [synonym], Osteopygis chelydrinus Cope 1868 [synonym], Osteopygis erosus Cope 1875 [synonym], Osteopygis gibbi Wieland 1904 [synonym], Osteopygis platylomus Cope 1870 [synonym], Osteopygis robustus Hay 1908 [synonym]
Diagnosis
ReferenceDiagnosis
A. D. Gentry et al. 2023O. emarginatus can be diagnosed as a representative of Osteopygis by the set of shell characters listed for the genus above. O. emarginatus can be differentiated from other species of Osteopygis by having a carapace that tapers in width at both the anterior and posterior ends, broad contact between the first vertebral and second marginal scales, a laterally expanded ninth neural, proportionally shorter plastral buttresses, a proportionally smaller second suprapygal, and by lacking anterior peripherals with upturned lateral margins.