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Sayimys sihongensis

Osteichthyes - Rodentia - Ctenodactylidae

Taxonomy
Sayimys sihongensis was named by Qiu (2017). Its type specimen is IVPP V 23215, a tooth (Left M1), and it is a 3D body fossil. Its type locality is Zhengji, which is in a Shanwangian fluvial-lacustrine conglomerate in the Xiacaowan Formation of China.

Sister species lacking formal opinion data
S. intermedius, S. obliquidens, S. sivalensis, S. sivalensis

Synonymy list
YearName and author
2017Sayimys sihongensis Qiu pp. 93-94 fig. 1

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
—CtenohystricaHuchon et al. 2000
superfamilyCtenodactyloidea
familyCtenodactylidaeGervais 1853
genusSayimysWood 1937
speciessihongensis

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.

†Sayimys sihongensis Qiu 2017
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Diagnosis
ReferenceDiagnosis
Z. Qiu 2017"Small species of Sayimys. DP4 with paraflexus and metaflexus quickly obliterated with occlusal wear, protocone being slightly internal to hypocone, paracone and metacone distinctly protrude buccally, and protoloph and metaloph being evidently longer than the anteroloph and posteroloph; M1 with quadrate outline and slightly larger hypocone than protocone, relatively transverse and straight protoloph and metaloph, developed paraflexus and metaflexus, and longer paraflexus than metaflexus, wide hypoflexus deeper than mesoflexus; M3 with short paraflexus and metaflexus, narrow, long and transverse mesoflexus."
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: herbivoref
Reproduction: viviparoussubc
Created: 2005-08-26 11:19:58
Modified: 2005-09-02 11:58:27
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Ji et al. 2002, Carroll 1988, Hendy et al. 2009, Nowak 1999

Age range: Shanwangian or 16.90000 to 13.82000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Shanwangian16.9 - 13.82China (Jiangsu) Sayimys sihongensis (235551 type locality: 235566)