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Rhacheosaurini

Reptilia - Metriorhynchidae

Taxonomy
Rhacheosaurini was named by Young et al. (2011). It is not extant. It was considered monophyletic by Parrilla-Bel et al. (2013).

It was assigned to Metriorhynchinae by Parrilla-Bel et al. (2013) and Barrientos-Lara et al. (2018).

Synonymy list
YearName and author
2011Rhacheosaurini Young et al.
2013Rhacheosaurini Parrilla-Bel et al. pp. 3-4
2018Rhacheosaurini Barrientos-Lara et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
RankNameAuthor
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
Pseudosuchia(Zittel 1890)
SuchiaKrebs 1974
Paracrocodylomorpha
Loricata(Merrem 1820)
Crocodylomorpha()
Thalattosuchia()
familyMetriorhynchidaeFitzinger 1843
subfamilyMetriorhynchinae
tribeRhacheosauriniYoung et al. 2011
tribeRhacheosauriniYoung et al. 2011

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.

Tr. †Rhacheosaurini Young et al. 2011
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G. †Cricosaurus Wagner 1858
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Cricosaurus albersdoerferi Sachs et al. 2021
Cricosaurus araucanensis Gasparini and Dellape 1976
Cricosaurus bambergensis Sachs et al. 2019
Cricosaurus elegans Wagner 1852
Cricosaurus gracilis Phillips 1871
Cricosaurus lithographicus Herrera et al. 2013
Cricosaurus mexicanus Wieland 1910
Cricosaurus puelchorum Herrera et al. 2021
Cricosaurus rauhuti Herrera et al. 2021
Cricosaurus saltillensis Buchy et al. 2006
Cricosaurus schroderi Kuhn 1936
Cricosaurus schroederi Kühn 1936
Cricosaurus suevicus Fraas 1901
Cricosaurus vignaudi Frey et al. 2002
Invalid names: Enaliosuchus Koken 1883 [synonym], Neustosaurus Raspail 1842 [nomen dubium]
G. †Maledictosuchus Parrilla-Bel et al. 2013
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Maledictosuchus nuyivijanan Barrientos-Lara et al. 2018
Maledictosuchus riclaensis Parrilla-Bel et al. 2013
G. †Rhacheosaurus Meyer 1831
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Rhacheosaurus gracilis Meyer 1831
Diagnosis
ReferenceDiagnosis
J. Parrilla-Bel et al. 2013Metriorhynchid crocodylomorphs with the following unique combination of characters (autapomorphic characters are indicated by an asterisk): posterodorsal retraction of external nares, with the anterior margin of the external nares starting posterior to the first premaxillary alveolus (ch. 7:3)*; development of premaxillary septum that divides the external nares along the skull midline (ch. 9:1)*; supratemporal fenestra subequal or shorter in length than orbits*; frontopostorbital suture lower than (ventral to) the intertemporal bar (ch. 60:1)*; infratemporal fenestra shorter in length than the orbit (ch. 86:2); paroccipital process dorsolaterally orientated, at an approximate 45 degree angle (ch. 104:1)*; teeth lack carinae (ch. 167:0); the anterior margin of both angular and surangular bones terminates anterior to the orbit (ch. 139–140:1)*; presacral vertebrae count increased by one (to 25) (ch. 178:1)*; number of caudal vertebrae increased by at least eight (>45); humerus shaft greatly reduced, contributing less than 25% of total humeral length (ch. 207:2); radius and ulna are subequal in size to the radiale and ulnare, respectively; tibia length greatly shortened, measuring less than 30% of femoral length (ch. 225:3).
Measurements
No measurements are available
Composition: hydroxyapatitesubo
Environment: marinesubo
Locomotion: actively mobilesubo
Life habit: nektonicsubo
Diet: carnivoresubo
Created: 2009-07-23 01:12:29
Modified: 2009-07-23 03:12:29
Source: subo = suborder
Reference: Kiessling 2004

Age range: base of the Middle Callovian to the top of the Late/Upper Valanginian or 164.70000 to 136.40000 Ma

Collections (24 total)


Time interval Ma Country or state Original ID and collection number
Middle Callovian164.7 - 161.2Spain (Zaragoza) Maledictosuchus riclaensis (138665)
Middle Oxfordian - Late/Upper Oxfordian161.2 - 155.7Cuba (Pinar del Río) Cricosaurus sp. Cuba (45797)
Kimmeridgian157.3 - 152.1Mexico (Oaxaca) Maledictosuchus nuyivijanan (207480)
Kimmeridgian157.3 - 152.1Germany (Bavaria) Cricosaurus bambergensis (207479)
Late/Upper Kimmeridgian155.7 - 150.8Germany (Baden-Württemberg) Cricosaurus suevicus (154138) Geosaurus suevicus, Cricosaurus suevicus (41817)
Late/Upper Kimmeridgian155.7 - 150.8Mexico (Coahuila) Cricosaurus saltillensis (110176)
Late/Upper Kimmeridgian155.7 - 150.8Germany (Bayern) Cricosaurus sp., Cricosaurus albersdoerferi (130048)
Tithonian152.1 - 145.0Germany (Franconia) Cricosaurus elegans (24521)
Tithonian152.1 - 145.0Mexico (Puebla) Geosaurus vignaudi (27249)
Early/Lower Tithonian150.8 - 145.0Germany (Bavaria) Cricosaurus rauhuti (224058) Rhacheosaurus gracilis (58604)
Early/Lower Tithonian150.8 - 145.0Argentina (Neuquén) Cricosaurus sp., Cricosaurus araucanensis (79651)
Early/Lower Tithonian150.8 - 145.0Germany (Bayern) Cricosaurus elegans, Cricosaurus gracilis (132062) Cricosaurus elegans, Rhacehosaurus gracilis (53039) Rhacheosaurus gracilis (212951)
Early/Lower Tithonian150.8 - 145.0Argentina Cricosaurus araucanensis (144919)
Early/Lower Tithonian150.8 - 145.0Mexico (Coahuila) Geosaurus saltillense (104859)
Middle Tithonian - Late/Upper Tithonian150.8 - 145.0Argentina (Neuquén) Cricosaurus lithographicus (92122)
Early/Lower Berriasian145.0 - 140.2Argentina (Mendoza) Cricosaurus puelchorum (224057)
Late/Upper Berriasian - Valanginian145.0 - 132.9Germany Enaliosuchus schroederi (95087)
Early/Lower Valanginian140.2 - 136.4France (Provence-Alpes-Côte d'Azur) Enaliosuchus macrospondylus (68272) Neustosaurus gigondarum (123475)
Late/Upper Valanginian140.2 - 136.4Germany (Lower Saxony) Cricosaurus macrospondylus (155308)