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Liaoconodon hui

Mammalia - Eutriconodonta

Taxonomy
Liaoconodon hui was named by Meng et al. (2011). Its type specimen is IVPP V16051, a skeleton (a skeleton preserved on one slab of laminated siltstone), and it is a 3D body fossil. Its type locality is Xiao-tai-zi, La-ma-dong, Jianchang, which is in an Aptian lacustrine siltstone in the Jiufotang Formation of China. It is the type species of Liaoconodon.

Synonymy list
YearName and author
2011Liaoconodon hui Meng et al. p. 181 figs. 1-2

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
RankNameAuthor
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderEutriconodontaKermack et al. 1973
genusLiaoconodon
specieshui

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.

Diagnosis
ReferenceDiagnosis
J. Meng et al. 2011A medial-sized eutriconodont with a body length of 195mm (from the tip of the rostrum to the hip) or 357mm including the tail (Fig. 1). Dental formula I3.C1.P2.M3/i2.c1.p2.m4, with molariform teeth having three main cusps mesiodistally arranged and laterally compressed, and a dentary lacking an angular process and post-dentary trough. Differs from all known eutriconodonts in having the lower incisors, canine and first premolariform proportionally enlarged, similar in shape, and closely packed in space, and in having a deep trench along the ventral border of the masseteric fossa. Further differs from triconodontids in having the main cusp A/a distinctively higher and more inflated than other cusps; from ‘jeholodentids’ in being larger and having relatively smaller (shorter) molariforms and a different dental formula; from gobiconodotids in having fewer molariforms and in lacking a proportionally enlarged first incisor and the interlocking mechanism between successive lower molariforms; from Repenomamus in being considerablysmaller, having a different dental formula and less inflated cusp A/a inmolariforms; from‘amphilestids’ in having fewer molariforms and cheek teeth asymmetrical in labial view. Phylogenetic analyses place Liaoconodon between triconodontids and paraphyletic ‘jeholodentids’.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: scansorialuc
Diet: insectivoreuc
Created: 2005-09-06 19:53:51
Modified: 2005-09-07 19:44:02
Source: c = class, subp = subphylum, uc = unranked clade
References: Luo et al. 2003, Carroll 1988, Hopson 1973, Hendy et al. 2009

Age range: Aptian or 125.00000 to 113.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Aptian125.0 - 113.0China (Liaoning) Liaoconodon hui (type locality: 129475)