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Sphenocondor gracilis
Taxonomy
Sphenocondor gracilis was named by Apesteguia et al. (2012). Its type specimen is MPEF-PV 2358, a mandible (a single dentary preserved in two slabs as part (A) and counterpart (B)), and it is a 3D body fossil. Its type locality is Queso Rallado, near Cerro Cóndor, which is in a Toarcian/Toarcian lacustrine mudstone in the Cañadón Asfalto Formation of Argentina. It is the type species of Sphenocondor.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Sphenocondor gracilis Apesteguia et al. p. 345 figs. 2-4 |
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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.
†Sphenocondor gracilis Apesteguia et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Apesteguia et al. 2012 | Small sphenodontian rhynchocephalian differing from all other rhynchocephalians in having the following combination of features: slender lower jaw with a low and squared coronoid process; dentary posterior process as long as the base of the coronoid process; at least two strongly recurved and profusely striated successional teeth with no separation between them (differing from Theretairus and Sphenovipera) and with an anterior flange marked by a wide canal; unadorned additional teeth; two dentine types organized in a radiating pattern; symphysis anterodorsally projected; adductor fossa centred under the coronoid process; and alternate hatchling dentition organized in three groups of different size and showing a slight basal constriction. These last three characters constitute autapomorphic features. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Middle Toarcian to the top of the Late/Upper Toarcian or 182.00000 to 175.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Toarcian - Late/Upper Toarcian | Argentina (Chubut) | Sphenocondor gracilis (type locality: 67434) |