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Nannippus aztecus

Mammalia - Perissodactyla - Equidae

Taxonomy
Nannippus aztecus was named by Mooser (1968). Its type specimen is FO 873, a maxilla (fragment of right maxillary with P3-M3), and it is a 3D body fossil.

It was synonymized subjectively with Nannippus minor by MacFadden (1984) and MacFadden (1998).

Synonyms
Synonymy list
YearName and author
1853Hipparion venustum Leidy p. 241
1860Hippotherium venustum Leidy p. 105
1869Hipparion venustum Leidy
1877Hipparion venustum Leidy p. 212
1889Hippotherium venustum Cope p. 448
1896Hipparion venustum Roger
1898Hipparion venustum Trouessart
1902Hipparion venustum Hay p. 621
1905Neohipparion venustum Trouessart
1916Hipparion minor Sellards p. 96
1918Hipparion minor Osborn p. 192 figs. Text Fig. 156
1918Hipparion venustum Osborn p. 200 figs. Text Fig. 165
1924Hipparion venustum Matthew
1930Hipparion venustum Hay
1940Nannippus minor Stirton p. 186
1940Nannippus venustus Stirton p. 186
1968Nannippus aztecus Mooser p. 7 figs. 9, 10, 11, 12
1980Nannippus minor MacFadden and Waldrop p. 31
1984Nannippus minor MacFadden
1989Nannippus minor Manning and MacFadden p. 37
1990Nannippus aztecus Hulbert, Jr. p. 855
1998Nannippus minor MacFadden p. 549
2006Nannippus aztecus Hulbert and Whitmore p. 15

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
RankNameAuthor
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
superfamilyEquoidea
familyEquidae
subfamilyEquinae
tribeHipparionini
genusNannippus(Matthew 1926)
speciesaztecus

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.

Nannippus aztecus Mooser 1968
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Invalid names: Hipparion minus Sellards 1916 [synonym]
Diagnosis
ReferenceDiagnosis
H. F. Osborn 1918 (Hipparion minor) (Sellards, pp. 97-98) "The enamel bordering the lakes in this small species is very much compli-
cated. The inner column of the tooth is elipsoidal in the cross section. The species may be known as Hipparion minor ....Of the hipparions, four species have now been described from Florida. Of these the largest is Hipparion princeps, the type and only known specimen of which was found on Peace Creek and hence is of uncertain geologic age. The two species, Hipparion plicatile and Hipparion ingenuum, were described by Leidy from the Alachua clays, but are present also in the hard rock phosphate deposits and in the bone valley formation. Of the four species, H. princeps is by far the largest, while the one here described as H. minor is much the smallest, The presence of the three species of hipparions in the Dunnellon and Bone Valley formations is one of the strong arguments for the essential contemporaneity of these
two formations."
H. F. Osborn 1918 (Hipparion venustum) (Leidy, 1859, p. 105) (1) Crown of the larger_specimen, (type, fig. 33) with enamel stained jet black and dentine and cement gray; (2)'broken at the bottoin and without inner median enamel column [protocone]; (3) in its present condition two inches in length; (4) moderate degree of mternal and posterior curvature. The smaller (paratype, fig. 32) brown in color; (5) half worn down; (6) a little less than an inch in length; (7) inner median enamel column [pro-
tocone] anteroposteriorly reniform. (Gidley, 1907) (8) One of the smallest and apparently most highly specialized of the group. (9) Greater elongation of the tooth crowns; (10). very complex plications of the walls of the fossettes; (11) a small, well rounded protocone, differing from that of Hipparian whitneyi and resembling that of H. gracile of Europe.
O. Mooser 1968Size very small . Protocone isolated nearly to base of crown in P3 to M3; attached by a narrow isthmus in extreme wear. Protocones relatively compressed and elongated , with long axis oriented lingually , especially in well-worn teeth . Enamel of fossettes much plicated.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingsubf
Diet: grazersubg
Reproduction: viviparoussubc
Created: 2009-01-04 10:28:56
Modified: 2009-01-04 12:56:41
Source: subg = subgenus, subf = subfamily, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, MacFadden 1998, MacFadden and Cerling 1996, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range: base of the Tortonian to the top of the Pliocene or 11.62000 to 2.58800 Ma

Collections (37 total)


Time interval Ma Country or state Original ID and collection number
Miocene23.03 - 5.333USA (Oklahoma) Nannippus minor (18094)
Miocene23.03 - 5.333Mexico (Chihuahua) Nannippus minor (18714)
Miocene23.03 - 5.333USA (Florida) Nannippus aztecus (18571) Nannippus minor (18510)
Middle Miocene15.97 - 11.608USA (Florida) Nannippus aztecus (161381)
Sarmatian12.7 - 11.608Ukraine (Crimea) Hipparion minus (60252)
Tortonian11.62 - 7.246USA (Florida) Hipparion minor (18505)
Late/Upper Miocene11.608 - 5.333Greece (Aegean) Hipparion minus (202120)
Late/Upper Miocene11.608 - 5.333Ukraine (Dnipropetrovsk) Hipparion minus (75067)
Hemphillian10.3 - 4.9Mexico (Guanajuato) Nannippus sp. (18718)
Hemphillian10.3 - 4.9Mexico (Jalisco) Nannippus aztecus (189790) Nannippus minor (18745)
Hemphillian10.3 - 4.9Mexico (Queretaro) Nannippus minor (18729)
Hemphillian10.3 - 4.9USA (Alabama) Nannippus aztecus (18559)
Hemphillian10.3 - 4.9USA (Louisiana) Nannippus minor (68441)
Hemphillian10.3 - 4.9USA (Texas) Nannippus aztecus (18097) Nannippus minor (18073)
Hemphillian10.3 - 4.9USA (Oklahoma) Nannippus aztecus (18034)
Hemphillian10.3 - 4.9USA (Florida) Nannippus aztecus (26549) Nannippus minor (18529 18556 18564 18577 18581 18584 18601 18602)
Late/Upper Hemphillian10.3 - 4.9USA (Texas) Nannippus aztecus (18036)
Late/Upper Hemphillian10.3 - 4.9Mexico (Guanajuato) Nannippus minor (18737 18740)
Late/Upper Hemphillian10.3 - 4.9USA (Florida) Nannippus minor (18553 18573 18599)
Late/Upper Hemphillian10.3 - 4.9Mexico (Chihuahua) Nannippus minor (18755)
late Early Hemphillian10.3 - 4.9USA (Florida) Nannippus minor (18552)
Pliocene5.333 - 2.588USA (Mississippi) Nannippus minor (162637)
Blancan4.9 - 1.8USA (Texas) Nannippus aztecus (20055)