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Calippus maccartyi

Mammalia - Perissodactyla - Equidae

Taxonomy
Calippus (Grammohippus) maccartyi was named by Hulbert (1988). Its type specimen is UF 69951, a partial skull (badly crushed anterior half of skull of adult male with R and L Il-!3, C, P2 and L P3-M3), and it is a 3D body fossil.

It was recombined as Calippus maccartyi by MacFadden (1998).

Synonymy list
YearName and author
1988Calippus (Grammohippus) maccartyi Hulbert, Jr. p. 276 figs. 20 - 21
1998Calippus maccartyi MacFadden p. 550

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
RankNameAuthor
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
orderPerissodactyla()
suborderLophodontomorpha
infraorderEuperissodactyla
Hippomorpha
superfamilyEquoidea
familyEquidae
subfamilyEquinaeSteinmann and Döderlein 1890
tribeEquini
genusCalippus()
speciesmaccartyi()

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
R. C. Hulbert 1988Small species of C. (Grammohippus) with toothrow lengths of about 100 mm. Preprotoconal groove deep, persistent. Protocones elongate, not short as in C. hondurensis; lingual borders rounded to slightly flattened; oriented slightly obliquely. Hypoconal groove open until mid-wear; forms lakes on P2-P4. Pli caballin small, single; fades with wear; vestigial or absent in molars. Plications simple but persistent, not lost until heavy wear. Upper cheekteeth not as curved as other species of Grammohippus. Lower cheekteeth with widely expanded metaconids and metastylids; lingual flexids more persistent than other species; variable protostylids; enamel plications in early wear-stages. Ectoflexid shallow on p2-p4, only moderately deep on m1- m3. Muzzle width about 60% of UTRL.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingsubf
Diet: grazerg
Created: 2009-01-04 10:25:39
Modified: 2009-01-04 12:25:39
Source: g = genus, subf = subfamily, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, MacFadden and Cerling 1996, Carroll 1988, Hendy et al. 2009, Ji et al. 2002, MacFadden 1998

Age range: Hemphillian or 10.30000 to 4.90000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Hemphillian10.3 - 4.9USA (Florida) Calippus maccartyi (18564) Pliohippus hondurensis (18601)