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