PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Trachoolithus

Reptilia - Elongatoolithidae

Taxonomy

Trachoolithus was named by Mikhailov (1994). It is considered to be a form taxon. Its type is Trachoolithus faticanus.

It was assigned to Elongatoolithidae by Mikhailov (1994), Mikhailov (2000), Zelenitsky et al. (2000), Amo Sanjuán et al. (2000), Mohabey (2001), Vianey-Liaud and Garcia (2003), Watabe (2004), Mohabey (2005), Wang et al. (2010), Wang et al. (2013), Huh et al. (2014), Simon et al. (2019), Jin et al. (2020).

Species

T. faticanus (type species)

Synonymy list

Year	Name and author
1994	Trachoolithus Mikhailov p. 119
2000	Trachoolithus Amo Sanjuán et al. p. 9
2000	Trachoolithus Mikhailov p. 569
2000	Trachoolithus Zelenitsky et al. p. 130
2001	Trachoolithus Mohabey p. 495
2003	Trachoolithus Vianey-Liaud and Garcia p. 182
2004	Trachoolithus Watabe p. 17
2005	Trachoolithus Mohabey p. 475
2010	Trachoolithus Wang et al. p. 114
2013	Trachoolithus Wang et al. p. 199
2014	Trachoolithus Huh et al. p. 220
2019	Trachoolithus Simon et al. p. 7
2020	Trachoolithus Jin et al. p. 9

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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	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida

Rank	Name	Author
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Theropoda	()
family	Elongatoolithidae
genus	Trachoolithus

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.

G. †Trachoolithus Mikhailov 1994

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†Trachoolithus faticanus Mikhailov 1994

Diagnosis

Reference	Diagnosis
K. E. Mikhailov 1994	Fairly small elongate-ellipsoidal eggs with fine striated (linear-tubercular) ornament and ratio of spongiose to mammillar layers exceeding 3:1.