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Hemiauchenia gracilis

Mammalia - Camelidae

Taxonomy
Hemiauchenia gracilis was named by Meachen (2005). Its type specimen is UF 210707, a mandible (right dentary fragment with p4-m3), and it is a 3D body fossil. Its type locality is De Soto Shell Pit 5, which is in a Blancan terrestrial horizon in the Caloosahatchee Formation of Florida.

Sister species lacking formal opinion data
H. vitakerianus

Synonymy list
YearName and author
2005Hemiauchenia gracilis Meachen p. 438
2010Hemiauchenia gracilis Jimenez-Hidalgo and Carranza-Castaneda pp. 56 - 57 figs. Figure 3; Tables 4–6

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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
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
suborderTylopoda()
familyCamelidae
subfamilyCamelinaeGray 1821
tribeLaminiWebb 1965
genusHemiauchenia
speciesgracilis

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.

†Hemiauchenia gracilis Meachen 2005
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Diagnosis
ReferenceDiagnosis
E. Jimenez-Hidalgo and O. Carranza-Castaneda 2010Considerably smaller than Hemiauchenia blancoensis,‘‘Hemiauchenia’ ’minima (Leidy) 1886 and Pleiolama vera; lacks p1 and p3; postcranial elements more slender than those of H. macrocephala and longer and usually more robust than those of Hemiauchenia edensis (Frick) 1921 (Meachen,2005). Shares homologous character states with Hemiachenia macrocephala and Hemiauchenia edensis, such as gracile molars, slender postcranial elements, and small size.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserg
Diet 2: grazerg
Reproduction: viviparoussubc
Created: 2009-01-04 10:39:26
Modified: 2009-01-04 12:39:26
Source: g = genus, f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Nowak 1999, Carroll 1988, Hendy et al. 2009, MacFadden and Cerling 1996, Nowak 1991

Age range: base of the Hemphillian to the top of the Rancholabrean or 9.40000 to 0.01400 Ma

Collections (15 total)


Time interval Ma Country or state Original ID and collection number
Hemphillian9.4 - 4.7Mexico (Nayarit) Hemiauchenia gracilis (212338)
Hemphillian9.4 - 4.7Mexico (Guanajuato) Hemiauchenia gracilis (18718)
Blancan4.7 - 1.4Mexico (Guanajuato) Hemiauchenia gracilis (20077)
Blancan4.7 - 1.4USA (Florida) Hemiauchenia gracilis (type locality: 101741 101742)
Blancan (interglacial)4.7 - 1.4USA (Florida) Hemiauchenia gracilis (98315)
Gelasian2.58 - 1.8USA (Florida) Hemiauchenia gracilis (19758) Hemiauchenia sp. (20384)
Irvingtonian1.4 - 0.21USA (Florida) Hemiauchenia sp. (20308)
Rancholabrean0.21 - 0.014Mexico (Hidalgo) Hemiauchenia gracilis (113409 113410 170157)
Late/Upper Pleistocene0.129 - 0.0117Mexico (Hidalgo) Hemiauchenia gracilis (190114 190115 190116)