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Olorotitan arharensis
Taxonomy
Olorotitan arharensis was named by Godefroit et al. (2003). Its type specimen is AEHM 2/845, a partial skeleton, and it is a 3D body fossil. Its type locality is Kundur, which is in a Maastrichtian fluvial claystone in the Udurchukan Formation of the Russian Federation.
It was corrected as Olorotitan ararhensis by Prieto-Márquez (2010).
It was corrected as Olorotitan ararhensis by Prieto-Márquez (2010).
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Olorotitan arharensis Godefroit et al. p. 144 fig. 1 |
| 2004 | Olorotitan arharensis Godefroit et al. p. 149 |
| 2004 | Olorotitan arharensis Horner et al. p. 442 |
| 2006 | Olorotitan arharensis Lund and Gates p. 273 |
| 2006 | Olorotitan arharensis Prieto-Márquez et al. p. 938 |
| 2007 | Olorotitan arharensis Evans and Reisz p. 387 fig. 9 |
| 2007 | Olorotitan arharensis Gates et al. p. 926 fig. 10 |
| 2008 | Olorotitan arharensis Dong p. 6 |
| 2008 | Olorotitan arharensis Godefroit et al. p. 59 |
| 2010 | Olorotitan arharensis Lauters et al. p. 49 |
| 2010 | Olorotitan arharensis Prieto-Marquez and Salinas p. 835 fig. 20 |
| 2010 | Olorotitan arharensis Prieto-Márquez p. 5 fig. 2 |
| 2010 | Olorotitan ararhensis Prieto-Márquez p. 443 |
| 2010 | Olorotitan arharensis Prieto-Márquez and Wagner p. 1243 |
| 2011 | Olorotitan arharensis Godefroit et al. p. 175 |
| 2011 | Olorotitan arharensis Prieto-Márquez p. 64 |
| 2011 | Olorotitan arharensis Sun et al. p. 125 |
| 2012 | Olorotitan arharensis Godefroit et al. p. 530 |
| 2012 | Olorotitan arharensis Godefroit et al. p. 1 |
| 2012 | Olorotitan arharensis Prieto-Marquez et al. p. 7 |
| 2012 | Olorotitan arharensis Prieto-Márquez p. 527 |
| 2012 | Olorotitan ararhensis Ramírez-Velasco et al. p. 392 |
| 2013 | Olorotitan arharensis Cruzado-Caballero et al. |
| 2014 | Olorotitan arharensis Bolotsky et al. p. 320 |
| 2014 | Olorotitan arharensis Brink et al. p. 245 |
| 2017 | Olorotitan arharensis Bertozzo et al. p. 43 |
| 2017 | Olorotitan ararhensis Cruzado-Caballero and Powell p. 12 fig. 13 |
| 2018 | Olorotitan arharensis Fondevilla et al. p. 8 |
| 2019 | Olorotitan arharensis Takasaki et al. p. 5 |
| 2021 | Olorotitan arharensis Gates et al. p. 17 |
| 2021 | Olorotitan arharensis Kobayashi et al. p. 5 |
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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.
†Olorotitan arharensis Godefroit et al. 2003
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Godefroit et al. 2003 | Helmet-like hollow crest and lateral premaxillary process developed caudally far beyond the level of the occiput; caudodorsal part of the dorsal premaxillary process depressed along the midline; postorbital process of the jugal very high (ratio ‘height of postorbital process/length of jugal’ = 0.9); rostral portion of the jugal shorter than in other lambeosaurines, with a perfectly straight rostral margin; very asymmetrical maxilla in lateral view, with ventral margin distinctly down turned; predentary square in dorsal view; neck and sacrum very elongated, with respectively 18 cervical and 15 or 16 sacral vertebrae; additional articulation between adjacent neural spines on the proximal third of the tail (it cannot be excluded that this is a pathological feature); scapula more elongated than in other hadrosaurids, with L/W ratio = 6.2. | |
| P. Godefroit et al. 2011 | Lambeosaurine dinosaur characterized by the following autapomorphies: large helmet-like hollow crest higher than the rest of the skull and extending caudally well beyond the level of the occiput; very high postorbital process of jugal ( ratio height of postotbital process / length of jugal = 1 ) ; rostral portion of the jugal shorter than in other lambeosaurines, with a perfectly straight rostral margin; very asymmetrical maxilla in lateral view, with ventral margin distinctly downturned; very elongated neck composed of 18 cervical vertebrae; tibia as high as the femur; shorter cnemial crest, about one fifth of tibia length. | |
| P. Godefroit et al. 2012 | Lambeosaurine dinosaur characterized by the following autapomorphies: large helmet−like hollow crest higher than the rest of the skull and extending caudally well beyond the level of the occiput; very high postorbital process of jugal (ratio height of postotbital process/length of jugal = 1); rostral portion of the jugal shorter than in other lambeosaurines, with a perfectly straight rostral margin; asymmetrical maxilla in lateral view, with ventral margin distinctly downturned; elongated neck composed of 18 cervical vertebrae; tibia as long as the femur; short cnemial crest, about one fifth of tibia length. |
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| humerus circumference | 1 | 190.0 |
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| Source: subo = suborder, o = order | |||||
| References: Benton 1983, Marsh 1875 | |||||
Age range: Late/Upper Maastrichtian or 72.20000 to 66.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Maastrichtian | Russian Federation (Amur) | Lambeosauridae indet. (type locality: 38134) |