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Hemiauchenia

Mammalia - Camelidae

Synonyms
Synonymy list
YearName and author
1878Auchenia vitakeriana Cope p. 380
1880Hemiauchenia Gervais and Ameghino
1884Holomeniscus Cope p. 16
1884Holomeniscus vitakeriana Cope p. 17
1898Camelops vitakerianus Wortman
1902Camelops vitakerianus Hay p. 679
1913Camelops vitakerianus Hay p. 276
1928Tanupolama Stock p. 31
1940Tanupolama Olson p. 54
1945Tanupolama Simpson p. 150
1965Tanupolama vitakerianus Webb
1965Tanupolama Webb p. 44
1980Hemiauchenia Kurten and Anderson p. 306
1988Hemiauchenia Carroll
1998Hemiauchenia Honey et al. p. 451
2004Hemiauchenia Webb and Meachen p. 350
2005Hemiauchenia Cisneros p. 250
2005Hemiauchenia Meachen p. 438
2005Hemiauchenia Ruez, Jr. p. 742
2020Hemiauchenia Lynch et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
RankNameAuthor
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Artiodactylamorpha
Artiodactyla()
familyCamelidae
subfamilyCamelinaeGray 1821
tribeLaminiWebb 1965
genusHemiauchenia

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.

G. †Hemiauchenia Gervais and Ameghino 1880
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Hemiauchenia edensis Frick 1921
Hemiauchenia gracilis Meachen 2005
Hemiauchenia guanajuatensis Dalquest and Mooser 1980
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Invalid names: Camelus americanus Wortman 1898 [synonym], Lama hollomani Hay and Cook 1930 [synonym], Lama stevensi Merriam and Stock 1925 [synonym], Tanupolama seymourensis Hibbard and Dalquest 1962 [synonym]
Hemiauchenia minima Leidy 1886
Hemiauchenia paradoxa Gervais and Ameghino 1880
Invalid names: Tanupolama Stock 1928 [synonym]
Diagnosis
ReferenceDiagnosis
S. D. Webb 1965 (Tanupolama)Tall, slender, llamalike camelid; larger than extant Lama. Cranium elongate, especially in rostral region; dorsal surface flat; maxillary fossa deep; condyloid fossa narrow; paroccipital process short; posterolateral groove in bulla deep and nar- row; bulla separated from basioccipital as in Lama. Ventral surface of mandible straight. Dental for- mula: I 1/3, C 1/1, P 2/3-1, M 3/3; upper molars with moderate to strong styles; external ribs weaker than in Lama; P 1 and P 3 present or absent; D13 often retained (see Dentition); lower molars with lingual face flatter than in Lama; "llama buttresses" seldoin as ·well.developed as in Lama but stronger than in Camelops or Palaeolama; M8 with third lo~e more strongly connected than in Lama (except in early wear stages) . Limbs much longer than in Lama; metapodials about twice as long as in Lama.