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Gilmoreteius chulsanensis
Taxonomy
Macrocephalosaurus chulsanensis was named by Sulimski (1975). Its type specimen is ZPal MgR-I/14, a partial skeleton (Complete skull with the postcranial skeleton. Distal end of tail, left humerus, a part of anterior autopodium and dorsal elements of the scapulae missing), and it is a 3D body fossil. Its type locality is Khulsan (general) [PMPE], which is in a Campanian/Campanian eolian sandstone/sandstone in the Baruungoyot Formation of Mongolia.
It was recombined as Gilmoreteius chulsanensis by Langer (1998); it was recombined as Macrocephaleon chulsanensis by Alifanov (2000).
It was recombined as Gilmoreteius chulsanensis by Langer (1998); it was recombined as Macrocephaleon chulsanensis by Alifanov (2000).
Synonymy list
| Year | Name and author |
|---|---|
| 1975 | Macrocephalosaurus chulsanensis Sulimski p. 41 figs. 2. 5-11, 14 |
| 1991 | Macrocephalosaurus chulsanensis Gao and Fox |
| 1998 | Gilmoreteius chulsanensis Langer |
| 2000 | Macrocephaleon chulsanensis Alifanov |
| 2000 | Macrocephalosaurus chulsanensis Alifanov p. 373 |
| 2000 | Macrocephalosaurus chulsanensis Gao and Norell p. 70 |
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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.
†Gilmoreteius chulsanensis Sulimski 1975
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Sulimski 1975 | Length of skulls about 40 mm in the case of young specimens and 70-80 mm for adult ones. Skull slender, with widened naso-prefrontal region. The ratio of occipital to maxillary segments is 1:3 and width to length of frontals - 0.5. Parietal foramen always on the fronto-parietal suture. Surface of naso-prefrontal region forms a plane, slightly inclined anteriorly in relation to the fronto-parietal surface. Sculpture of covering bones often well developed in [he form of regularly arranged cusps and rosettes. Parietal process of the post-frontal poorly developed, frontal long and slender. Jugal process wide, short and sharply pointed, slightly bent outwards. Suborbital fenestrae reduced to small perforated hollows. Anterior teeth of the maxilla, four-five in number, enlarged, canine-like, but not so well developed as in M. gilmorei. Anterior teeth of the lower jaw , five-six in number , are unicuspid and are equal in height to cheek teeth. Lower jaw slender and not so deep in the angular region, as in M . gilmorei. Teeth in both jaws numerous, about 27 or 28; 8 premaxillary teeth are present. Scapulo-coracoid of iguanid type with three fenestrae. |
Measurements
No measurements are available
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| Source: g = genus, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Kiessling 2004, Hendy et al. 2009, Carroll 1988, Gao and Norell 2000 | |||||
Age range: base of the Middle Campanian to the top of the Late/Upper Campanian or 83.60000 to 72.20000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Campanian - Late/Upper Campanian | Mongolia (Omnogov) | Macrocephalosaurus chulsanensis (type locality: 13776 62913 189007) |