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Taxonomy
Oreithyia oaklandi was named by Smith (2011). It is not extant. Its type locality is Medicine Pole Hills, which is in a Chadronian channel sandstone in the Chadron Formation of North Dakota. It is the type species of Oreithyia.
Synonyms
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Synonymy list
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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.
†Oreithyia oaklandi Smith 2011
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Invalid names: Orithyia oaklandi Smith 2011 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. T. Smith 2011 (Orithyia oaklandi) | An iguanid lizard similar to Corytophaninae in the
following derived features: continuous jugal buttress on maxilla; convex dorsal margin of posterior ramus of postorbital; and Yshaped parietal. Similar to Laemanctus and Corytophanes in the following derived features: medial folding of facial process occurs low on maxilla; slightly more oblique relationship between main body of ectopterygoid and lateral margin; (possibly) poor development of periorbital scale row; angulation toward ventral in ventral margin of frontal process of prefrontal; prominent ventral keel on anterior ramus of postorbital; distinct ventral inflection along posterior ramus of postorbital for squamosal articulation; strong adductor crests of parietal; junction of adductor crests near level of recessus processi ascendentis; poor division of cerebral hemispheres; and small angular process of prearticular. Plesiomorphic with respect to Laemanctus and Corytophanes in the following respects: gutter on maxilla short; palatine process of maxilla extremely weak; more gradual posterior decay of facial process of maxilla; median ventral ridge on frontal between grooves for solium supraseptale; quadratojugal process of jugal absent; ventral inflection on posterior ramus of postorbital weak; compound bone not depressed at articular; and angular process with anteroventromedial orientation. Autapomorphic in the following ways: fossa on orbital surface of antorbital flange of prefrontal; incision of palatine nerve into medial edge of antorbital flange of prefrontal; ridge beneath prefrontal boss bladelike; (variably) deep longitudinal fossae laterally along cristae cranii; dual foramina below postorbital facet on jugal; rugosity on lateral surface of surangular opposite coronoid articulation; flange connecting angular and retroarticular processes nearly absent; posterodorsally trending ridge on lateral surface of surangular; and dorsal curvature of retroarticular process. |
Measurements
No measurements are available
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| Source: f = family, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Behler and King 1979, Hendy et al. 2009, Carroll 1988 | |||||
Age range: Chadronian or 37.20000 to 33.90000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chadronian | USA (North Dakota) | Aciprion sp., Iguanidae MPH-3 (16991) |