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Uruguaysuchus
Taxonomy
Uruguaysuchus was named by Rusconi (1933). Its type is Uruguaysuchus aznarezi. It is the type genus of Uruguaysuchinae.
It was assigned to Uruguaysuchinae by Rusconi (1933); to Notosuchidae by Price (1959); to Mesoeucrocodylia by Pol and Norell (2004); to Notosuchia by Turner (2006), Zaher et al. (2006), Fiorelli and Calvo (2008), Turner and Sertich (2010), Martin et al. (2010), Nascimento and Zaher (2011), Iori and Carvalho (2011), Bronzati et al. (2012), Sertich and O'Connor (2014); and to Uruguaysuchidae by Carroll (1988), Carvalho et al. (2004), Andrade and Bertini (2008), Soto et al. (2011), Pol et al. (2012), Pol et al. (2014), Fernández Dumont et al. (2024).
It was assigned to Uruguaysuchinae by Rusconi (1933); to Notosuchidae by Price (1959); to Mesoeucrocodylia by Pol and Norell (2004); to Notosuchia by Turner (2006), Zaher et al. (2006), Fiorelli and Calvo (2008), Turner and Sertich (2010), Martin et al. (2010), Nascimento and Zaher (2011), Iori and Carvalho (2011), Bronzati et al. (2012), Sertich and O'Connor (2014); and to Uruguaysuchidae by Carroll (1988), Carvalho et al. (2004), Andrade and Bertini (2008), Soto et al. (2011), Pol et al. (2012), Pol et al. (2014), Fernández Dumont et al. (2024).
Species
U. aznarezi (syn. U. terrai) (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1933 | Uruguaysuchus Rusconi p. 12 |
| 1959 | Uruguaysuchus Price |
| 1988 | Uruguaysuchus Carroll |
| 2004 | Uruguaysuchus Carvalho et al. p. 988 fig. 7 |
| 2004 | Uruguaysuchus Pol and Norell |
| 2006 | Uruguaysuchus Turner |
| 2006 | Uruguaysuchus Zaher et al. |
| 2008 | Uruguaysuchus Andrade and Bertini |
| 2008 | Uruguaysuchus Fiorelli and Calvo |
| 2010 | Uruguaysuchus Martin et al. |
| 2010 | Uruguaysuchus Turner and Sertich |
| 2011 | Uruguaysuchus Iori and Carvalho |
| 2011 | Uruguaysuchus Nascimento and Zaher |
| 2011 | Uruguaysuchus Soto et al. |
| 2012 | Uruguaysuchus Bronzati et al. |
| 2012 | Uruguaysuchus Pol et al. |
| 2014 | Uruguaysuchus Pol et al. |
| 2014 | Uruguaysuchus Sertich and O'Connor |
| 2024 | Uruguaysuchus Fernández Dumont et al. |
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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.
G. †Uruguaysuchus Rusconi 1933
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†Uruguaysuchus aznarezi Rusconi 1933
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Invalid names: Uruguaysuchus terrai Rusconi 1933 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Soto et al. 2011 | Uruguaysuchus can be diagnosed by the presence of the following unique combination of characters (autapomorphies marked with an asterisk): heterodont dentition (maxilla: 1–2 incisiviform teeth, 1 caniniform tooth and 9–10 post-caniniform teeth; dentary: 6–7 incisiviform teeth, 10–11 ‘postcaniniform’ teeth); hypertrophied 2nd or (in juveniles) 3rd maxillary tooth; post-caniniform spatulated teeth showing strong buccolingual compression, subcircular in shape (in buccal or lingual view), with a pointed central cusp and minute denticles in a single row along the mesial and distal margins*; strong constriction at the base of the crown and marked apicobasal groove along the lingual surface of the root; choanal septum completely divides the opening; posterior region of septum with subcircular cross-section and anterior region T-shaped in cross-section* (broad expansion at the ventral surface of the choana); ventral surface of choanal septum bearing a longitudinal groove; acute anterior tip of the choanal septum that wedges between the palatines; basisphenoid and basioccipital not exposed in ventral view of the skull (given that the extensive posterior region of the pterygoid flanges projects caudally)*; pterygoids fused posterior to the choanal opening, but towards the posterior ends the two flanges meet, forming a narrow sulcus*; posterior border of the choanal opening formed by an elevated rim that projects more ventrally than the palatal surface of the pterygoid flanges*; lateral surface of the quadrate pierced by a dorsally located preotic siphoneal opening, partially exceeding the dorsal margin of the otic aperture*. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Kiessling 2004, Bush and Bambach 2015, Carroll 1988, Hendy et al. 2009, Benton 1983 | |||||
Age range: base of the Cenomanian to the top of the Santonian or 100.50000 to 83.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cenomanian - Santonian | Uruguay (Paysandú) | U. aznarezi, U. terrai (65322) |