Interatherium interruptum Ameghino, 1894a
publication ID |
https://doi.org/ 10.11646/zootaxa.4543.2.2 |
publication LSID |
lsid:zoobank.org:pub:11F546CD-109F-4CBC-B87D-EA8D1AD0B96F |
DOI |
https://doi.org/10.5281/zenodo.5931275 |
persistent identifier |
https://treatment.plazi.org/id/B0798797-FFBD-286F-72CB-CEE8FB21FCF8 |
treatment provided by |
Plazi |
scientific name |
Interatherium interruptum Ameghino, 1894a |
status |
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Interatherium interruptum Ameghino, 1894a
Holotype. MACN-A 3445 ( Fig. 1 D View FIGURE 1 ), left maxilla with the alveolus of dP1, and series dP2–3 and P4–M3.
Age and provenance of the type material. Santacrucian SALMA, early Miocene , Santa Cruz Province ( Argentina).
Original description ( Ameghino 1894a: 18). “ De la taille de 1’ I. supernum . Cette espèce se distingue facilement par la présence de la première prémolaire supérieure qui est placée contre la partie antérieure de la deuxième, et par la disparition complète de la canine. Il y a une longue barre qui sépare la première prémolaire de l'incisive externe; le bord de cette barre porte un sillon longitudinal profond qui suit la même direction de la série dentaire. Longueur des sept molaires supérieures, 25 mm ”.
English translation. With the same size as I. supernum . This species is easily distinguished by the presence of the first upper premolar that is placed against the anterior part of the second, and by the complete absence of the upper canine. There is a long diastema that separates the first premolar from the external incisor; the margin of this diastema shows a deep longitudinal groove that has the same direction as the dental series. Length of the seven upper molars, 25 mm.
Comments. Ameghino (1894a) did not illustrate this species. According to Ameghino’s catalogue and Mones (1986), the left maxilla MACN-A 3445 is the type specimen of the species. This material lacks the canine and, instead, exhibits a long diastema placed anteriorly to the alveolus of dP1 (L = 4.1 mm). It also shows the groove described by Ameghino, and the length of dP1–M3 is 24.8 mm. All of this coincides with Ameghino’s (1894a) description and, consequently, MACN-A 3445 is confirmed as the holotype of I. interruptum .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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