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Archaeomerycidae

Mammalia - Artiodactyla - Archaeomerycidae

Synonymy list
YearName and author
1945Archaeomerycidae Simpson
2001Archaeomerycidae Vislobokova p. S134
2006Archaeomerycidae Métais

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
RankNameAuthor
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderArtiodactyla()
Ruminantiamorpha
Ruminantia(Scopoli 1777)
familyArchaeomerycidaeSimpson 1945
familyArchaeomerycidaeSimpson 1945

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
I. A. Vislobokova 2001Skull brachycephalic with very short snout. Sagittal, temporal, and occipital crests strong. Sagittal crest long. Temporal crests curved ante- riorly and joined close to coronal suture. Orbits small,. placed centrally, and closed posteriorly. Postorbital bar formed half of frontal and half of jugal. Parietal foram- ina small. Foramen ovale small, placed posteriorly. Mastoid exposure mainly lateral. Auditory bulla very small without contact with postglenoid process. Exter- nal meatus weakly developed. Stylohyoid vagina extremely shallow, very widely open posteriorly. Petro- sal small, short, and broad, set closer to horizontal plane than to parasagittal one, and pressed closely against basioccipital; anteroventral border of petrosal placed far from postglenoid process. Promontorium weak, short, corresponding to main whorl of cochlea. Fenestra vestibuli small. Tensor tympani fossa small and located posteriorly. Behind fenestrae vestibuli and cochleae, stapedial muscle fossa narrow. Epitympanic recess on petrosal. Lacrimal with small facial and orbital parts. Lacrimal foramen within orbit. Ethmoidal fissure small and triangUlar or absent. Nasals elongated, not projecting anteriorly above anterior opening of nasal cavity. Palate flattened. Median concavity of pal- ate a little behind M3. Posterior opening of infraorbital canal placed in maxilla. Anterior opening of nasal cav- ity ovoid in dorsal view. Angular process of mandible narrow and strongly projecting posteriorly. Upper inci- sors very small. Canines small and procumbent, lower canine spatulate. PI absent. Forelimbs shorter than hindlimbs. Radius and ulna, tibia and fibula, and central metapodials separate. Fibula strongly reduced but os malleolus incompletely developed. Astragalus elon- gated and tripulley, with nonparallel trochleae. Metapo- dials separate. Manus pentadactyl. Pes tetradactyl.