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Macroolithus mutabilis

Osteichthyes - Elongatoolithidae

Taxonomy
Macroolithus mutabilis was named by Mikhailov (1994). It is considered to be a form taxon. Its type specimen is PIN 4477/5, an egg, and it is a 3D body fossil. Its type locality is Ikh-Shunkht (PIN coll. 4477) [SMPE], which is in a Campanian/Campanian terrestrial horizon in the Baruungoyot Formation of Mongolia.

Synonymy list
YearName and author
1994Macroolithus mutabilis Mikhailov p. 118
1997Macroolithus mutabilis Mikhailov p. 64
2000Macroolithus mutabilis Amo Sanjuán et al. p. 13
2000Macroolithus mutabilis Mikhailov p. 569
2000Macroolithus mutabilis Zelenitsky et al. p. 132
2023Macroolithus mutabilis Tanaka et al. p. 202

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
RankNameAuthor
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Saurischia()
—Theropoda()
familyElongatoolithidae
genusMacroolithus
speciesmutabilis

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.

†Macroolithus mutabilis Mikhailov 1994
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Diagnosis
ReferenceDiagnosis
K. E. Mikhailov 1994Thick eggshell: predominant range of thickness (in equatorial region) 1.5-1.8 mm; total range 1.3-2.0 mm (with elements of sculpture up to 2.3 mm). Pore canals having large funnels. Fragments characteristically having "aberrational" surface (approximately three fragments) without sculpture and with slitlike pore canals.