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

Eostega

Reptilia - Avetheropoda - Sulidae

Taxonomy
Eostega was named by Lambrecht (1929).

It was assigned to Elopterygidae by Lambrecht (1933), Wetmore (1960) and Olson (1985); and to Sulidae by Mlikovsky (2007) and Mayr (2009).

Synonymy list
YearName and author
1929Eostega Lambrecht
1933Eostega Lambrecht p. 289
1960Eostega Wetmore p. 25
1985Eostega Olson p. 192
2007Eostega Mlikovsky p. 20
2009Eostega Mayr p. 64

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
RankNameAuthor
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Theropoda()
Neotheropoda
AverostraPaul 2002
Tetanurae
orderAvetheropoda
suborderCoelurosauria
Maniraptora
Paraves
classAves
orderSuliformesSharpe 1891
familySulidaeReichenbach 1849
genusEostegaLambrecht 1929

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.

Diagnosis
ReferenceDiagnosis
J. Mlikovsky 2007Typical sulid with a strong, straight mandible, having a single fenestra, which differs from mandibles of modern sulid genera in having: (1) processus coronoideus located above internal fenestra mandibularis, (2) medial fossa aditus canalis neurovascularis sharply bordered and narrow, (3) cotyla medialis of the fossa articularis quadratica long and slender, (4) cotyla caudalis of the same fossa narrow and clearly bordered posteriorly, and (5) dorsal margin of the intermediate part of ramus mandibulae rather narrow, with medial ridge lower than lateral ridge.