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Dakosaurus
Taxonomy
Dakosaurus was named by Quenstedt (1856) [Sepkoski's age data: J Oxfo K Haut-l Sepkoski's reference number: 2,620]. Its type is Geosaurus maximus.
It was synonymized subjectively with Steneosaurus by Hulke (1869); it was misspelled as Dacosaurus by Sauvage (1873), Quenstedt (1882), Delair (1958), Charig (1967), Carroll (1988), Sepkoski (2002), Gasparini et al. (2006), Buchy et al. (2007), Young et al. (2010), Nascimento and Zaher (2011), Cau and Fanti (2011), Bronzati et al. (2012), Young et al. (2013), Young (2013), Young et al. (2014), Herrera and Vennari (2014), Sertich and O'Connor (2014), Parrilla-Bel and Canudo (2015), Young et al. (2024).
It was assigned to Amphicoelia by Owen (1861); to Mosasauria by Sauvage (1873); to Dinosauri by Quenstedt (1882); to Teleosauridae by Delair (1958); to Crocodilia by Sepkoski (2002); to Metriorhynchidae by Carroll (1988), Gasparini et al. (2006), Buchy et al. (2007); to Thalattosuchia by Charig (1967), Bronzati et al. (2012); to Geosaurini by Cau and Fanti (2011), Young et al. (2013), Young (2013), Young et al. (2014), Herrera and Vennari (2014); to Neosuchia by Nascimento and Zaher (2011), Sertich and O'Connor (2014); to Geosaurinae by Young et al. (2010), Parrilla-Bel and Canudo (2015); and to Dakosaurina by Young et al. (2024).
It was synonymized subjectively with Steneosaurus by Hulke (1869); it was misspelled as Dacosaurus by Sauvage (1873), Quenstedt (1882), Delair (1958), Charig (1967), Carroll (1988), Sepkoski (2002), Gasparini et al. (2006), Buchy et al. (2007), Young et al. (2010), Nascimento and Zaher (2011), Cau and Fanti (2011), Bronzati et al. (2012), Young et al. (2013), Young (2013), Young et al. (2014), Herrera and Vennari (2014), Sertich and O'Connor (2014), Parrilla-Bel and Canudo (2015), Young et al. (2024).
It was assigned to Amphicoelia by Owen (1861); to Mosasauria by Sauvage (1873); to Dinosauri by Quenstedt (1882); to Teleosauridae by Delair (1958); to Crocodilia by Sepkoski (2002); to Metriorhynchidae by Carroll (1988), Gasparini et al. (2006), Buchy et al. (2007); to Thalattosuchia by Charig (1967), Bronzati et al. (2012); to Geosaurini by Cau and Fanti (2011), Young et al. (2013), Young (2013), Young et al. (2014), Herrera and Vennari (2014); to Neosuchia by Nascimento and Zaher (2011), Sertich and O'Connor (2014); to Geosaurinae by Young et al. (2010), Parrilla-Bel and Canudo (2015); and to Dakosaurina by Young et al. (2024).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1839 | Plerodon Meyer p. 77 |
| 1842 | Brachytaenius Merian |
| 1845 | Brachytaenius Meyer p. 282 |
| 1856 | Dakosaurus Quenstedt |
| 1861 | Dakosaurus Owen p. 300 |
| 1873 | Dacosaurus Sauvage p. 384 |
| 1882 | Dakosaurus Quenstedt p. 182 |
| 1958 | Dakosaurus Delair p. 59 |
| 1967 | Dakosaurus Charig p. 710 |
| 1988 | Dakosaurus Carroll |
| 2002 | Dakosaurus Sepkoski |
| 2006 | Dakosaurus Gasparini et al. p. 72 |
| 2007 | Dakosaurus Buchy et al. |
| 2010 | Dakosaurus Young et al. p. 858 |
| 2011 | Dakosaurus Cau and Fanti p. 558 fig. 6 |
| 2011 | Dakosaurus Nascimento and Zaher |
| 2012 | Dakosaurus Bronzati et al. |
| 2013 | Dakosaurus Young |
| 2013 | Dakosaurus Young et al. |
| 2014 | Dakosaurus Herrera and Vennari |
| 2014 | Dakosaurus Sertich and O'Connor |
| 2014 | Dakosaurus Young et al. |
| 2015 | Dakosaurus Parrilla-Bel and Canudo |
| 2024 | Dakosaurus Young et al. p. 608 |
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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. †Dakosaurus Quenstedt 1856
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†Dakosaurus andiniensis Vignaud and Gasparini 1996
†Dakosaurus maximus Plieninger 1846
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Invalid names: Dakosaurus gracilis Quenstedt 1885 [synonym], Dakosaurus lissocephalus Seeley 1869 [synonym], Megalosaurus schnaitheimii Bunzel 1871 [synonym]
Invalid names: Brachytaenius Merian 1842 [synonym], Plerodon Meyer 1839 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. T. Young et al. 2010 | Metriorhynchid thalattosuchian with large robust teeth, with little lateromedial compression, and with the carinae formed by denticles that are wider transversely than in the root–apex direction; cranial bones smooth, lacking conspicuous ornamentation; acute angle formed by the lateral and medial processes of the frontal; the supratemporal fenestrae reach the minimum intraorbital distance; the lateral mandibular groove possesses a well-developed foramen at either end; surangular poorly developed, terminating caudal to the anterior margin of the orbit; the distance between the ventral margin of the antorbital fenestra and the ventral margin of the tooth row is greater than the diameter of the antorbital fenestra; the cross-sectional thickness of the cranial bone is generally > 1.5 mm. |
Measurements
No measurements are available
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| Source: subo = suborder | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Late/Upper Callovian to the top of the Late/Upper Aptian or 165.30000 to 113.20000 Ma
Collections (35 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Callovian | France (Basse-Normandie) | D. maximus (52633) | |
| Middle Callovian | United Kingdom (England) | D. Mr Leeds sp. (109800) | |
| Oxfordian | United Kingdom (England) | D. sp. (100669) | |
| Late/Upper Jurassic | Germany (Baden-Württemberg) | D. maximus (93216) | |
| Early/Lower Kimmeridgian | United Kingdom (England) | D. maximus, D. lissocephalus (119508) | |
| Early/Lower Kimmeridgian - Late/Upper Kimmeridgian | Mexico (Nuevo Leon) | D. sp. (136131) | |
| Kimmeridgian | Mexico (Coahuila) | D. sp. (143339) | |
| Kimmeridgian | Spain (Asturias) | D. sp. (154961) | |
| Kimmeridgian | United Kingdom (england) | D. maximus (144398) | |
| Kimmeridgian | Germany (Bavaria) | D. maximus (207479) | |
| Kimmeridgian - Early/Lower Tithonian | United Kingdom (England) | D. maximus (156363) | |
| Late/Upper Kimmeridgian | United Kingdom (England) | D. sp. (70996) | |
| Late/Upper Kimmeridgian | Germany | D. maximus (74069) | |
| Late/Upper Kimmeridgian | France (Nord-Pas-de-Calais) | D. maximus (94534) | |
| Late/Upper Kimmeridgian | Switzerland (Solothurn) | D. maximus (133662) | |
| Late/Upper Kimmeridgian | Germany (Bayern) | D. maximus (59175 130048) | |
| Late/Upper Kimmeridgian | Germany (Baden-Württemberg) | D. maximus (154138 229120) D. maximus, Megalosaurus sp. (89120) D. sp. (41817) | |
| Late/Upper Kimmeridgian - Early/Lower Tithonian | United Kingdom (England) | D. sp. (138974) | |
| Early/Lower Tithonian | Germany (Bayern) | D. maximus (53039 105541 152901) | |
| Tithonian | Argentina (Mendoza) | D. andiniensis (72049 72050) | |
| Tithonian | Germany (Franconia) | D. maximus (24523) | |
| Late/Upper Tithonian | Argentina (Mendoza) | D. sp. (143305) | |
| Late/Upper Tithonian - Early/Lower Berriasian | Argentina (Neuquén) | D. andiniensis (154296) | |
| Berriasian | Argentina (Mendoza) | D. andiniensis (72051 190078) | |
| Berriasian | Argentina (Neuquén) | D. sp. (122662) | |
| Early/Lower Aptian | United Kingdom (England) | D. sp. (36581) | |
| Late/Upper Aptian | United Kingdom (England) | D. sp. (58095) |