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Razanandrongobe sakalavae

Description

Razanandrongobe (meaning "ancestor [of the] large lizard" in Malagasy) is a genus of carnivorous sebecosuchian from the Middle Jurassic of Madagascar. It is based on MSNM V5770, a fragment of maxilla, the main tooth-bearing bone of the upper jaw, and several isolated teeth have also been assigned to it. The remains come from the Bathonian-age Isalo Illb rock unit of Mahajanga. The jaw fragment and teeth are similar to the representative bones of theropod dinosaurs and some types of crocodylomorphs, and the authors refrained from assigning the genus to either group. They interpreted the stout teeth as having been used for crushing bones, and their denticles are remarkably large, even larger than those of Tyrannosaurus. Remains described in 2017 have given further insight to the phylogeny of R. sakalavae, revealing it to be the oldest known notosuchian.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)4967801https://www.gbif.org/species/4967801
PaleoBioDB ID (PBDB)144586https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=144586
Rankspecies
Taxonomy (GBIF)Life : Animalia : Chordata : Reptilia : Razanandrongobe : Razanandrongobe sakalavae
Taxonomy (PBDB)Life : Animalia : Chordata : Reptilia : Eosuchia : Razanandrongobe : Razanandrongobe sakalavae
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-TriploblasticaLankester 1877
-NephrozoaJondelius et al. 2002
-DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
subphylumVertebrataLamarck 1801
superclassGnathostomataGegenbauer 1874
-Osteichthyes
-SarcopterygiiRomer 1955
subclassDipnotetrapodomorpha
subclassTetrapodomorpha
-Tetrapoda
-ReptiliomorphaSäve-Söderbergh 1934
-AnthracosauriaSäve-Söderbergh 1934
-Batrachosauria
-Cotylosauria
-AmniotaHaeckel 1866
-SauropsidaHuxley 1864
classReptiliaLaurenti 1768
subclassEureptilia
-RomeriidaGauthier et al. 1988
-Diapsida
-Eosuchia
-NeodiapsidaBenton 1985
-SauriaGauthier 1984
-Archosauromorpha
-CrocopodaEzcurra 2016
-ArchosauriformesGauthier 1986
-EucrocopodaEzcurra 2016
-Archosauria
-Pseudosuchia
-SuchiaKrebs 1974
-ParacrocodylomorphaParrish 1993
-Loricata
-Crocodylomorpha
suborderCrocodyliformesHay 1930
-MesoeucrocodyliaWhetstone and Whybrow 1983
infraorderNotosuchiaGasparini 1971
genusRazanandrongobeMaganuco et al. 2006
speciesRazanandrongobe sakalavaeMaganuco et al. 2006
Generic NameRazanandrongobe
Scientific NameRazanandrongobe sakalavae Maganuco et al., 2006
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Razanandrongobe sakalavaespeciesbelongs to Razanandrongobestated with evidenceMaganuco et al., 2006
Razanandrongobe sakalavaespeciesbelongs to Razanandrongobestated without evidenceMaganuco et al., 2007
Razanandrongobe sakalavaespeciesbelongs to Razanandrongobestated with evidenceDal Sasso et al., 2017
Status (PBDB)extinct
Taxon Size (PBDB)1
First Recorded Appearance168 - 166 Ma
Middle Jurassic
Last Recorded Appearance168 - 166 Ma
Middle Jurassic
Environmentmarine (based on Mesoeucrocodylia)
Motilityactively mobile (based on Osteichthyes)
Dietcarnivore (based on Pseudosuchia)
Taphonomyphosphatic (based on Vertebrata)
Primary Reference (PBDB)S. Maganuco, C. Dal Sasso, and G. Pasini. 2006. A new large predatory archosaur from the Middle Jurassic (Bathonian) of Madagascar. Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 147(1):19-51
Wikipediahttps://en.wikipedia.org/wiki/Razanandrongobe_sakalavae

Fossil Distribution

Synonymy List

YearName and Author
2006Razanandrongobe sakalavae Maganuco et al. pp. 24-25 figs. 4-8
2007Razanandrongobe sakalavae Maganuco et al. p. 268
2017Razanandrongobe sakalavae Dal Sasso et al.

References

Maganuco S., Dal Sasso C., et al (2006) A new large predatory archosaur from the Middle Jurassic (Bathonian) of Madagascar, Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 147 1, 19-51
Maganuco S., Cau A., et al (2007) Evidence of large theropods from the Middle Jurassic of the Mahajanga Basin, NW Madagascar, with implications for ceratosaurian peal ungual evolution, Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 148 2, 261-271
Dal Sasso C., Pasini G., et al (2017) Razanandrongobe sakalavae, a gigantic mesoeucrocodylian from the Middle Jurassic of Madagascar, is the oldest known notosuchian, PeerJ 5, e3481:1-32
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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