Protypotherium claudum Ameghino, 1889

Fernández, Mercedes, Fernicola, Juan C. & Cerdeño, Esperanza, 2023, Systematic revision of the species of Protypotherium (Notoungulata: Interatheriidae) from the Santa Cruz Formation (Early-Middle Miocene), Argentinian Patagonia: a new phylogenetic hypothesis for the Interatheriidae, Zoological Journal of the Linnean Society 199 (2), pp. 417-444 : 432

publication ID

https://doi.org/ 10.1093/zoolinnean/zlad043

DOI

https://doi.org/10.5281/zenodo.8426265

persistent identifier

https://treatment.plazi.org/id/03B17549-E920-476B-9EFD-FA19FABEFD94

treatment provided by

Plazi

scientific name

Protypotherium claudum Ameghino, 1889
status

 

Protypotherium claudum Ameghino, 1889

( Fig. 8B–D View Figure 8 ; Supporting Information, Table S2)

1889 Protypotherium claudum Ameghino , p. 480 (original description), pl. 14, fig. 22.

Holotype: MACN-A 551 ( Fig. 8B View Figure 8 ), right mandibular fragment with p2 (alveolus)–p3–m2 (see Fernández et al. 2018), Early– Middle Miocene , SCF, Santa Cruz Province ( Argentina).

Referred materials: MLP 73-VII-6-4 d (ex Interatheriinae indet; Fig. 8C View Figure 8 ), less mandibular fragment with p2 (broken)–m2 (trigonid), and MPEF-PV 1394 ( Fig. 8D View Figure 8 ), incomplete mandible with less i1–dp1–p2–4, and right i1 and dp1–p2–m3.

Extended diagnosis: Protypotherium claudum differs from Pr. compressidens , Pr. antiquum , Pr. australe , Pr. praerutilum , Pr. columnifer , Pr. minutum , and Pr. colloncurensis by p2–3 without the entoflexid and with the ectoflexid wider and slightly more mesially placed, and p4–m3 with shallower entoflexid; from Pr. australe and Pr. distinctum by having a smaller size; from Pr. compressidens by having relatively wider lower cheek teeth; from Pr. antiquum by the talonid of m3 without labial groove; from Pr. colloncurensis and Pr. columnifer by the talonid of p2–4 sub-triangular in outline; and from Pr. columnifer by the talonid of p4 narrower than the trigonid.

Geographic and stratigraphic provenance: Santa Cruz Province ( Argentina), SCF, Early–Middle Miocene, Santacrucian SALMA; Río Negro Province ( Argentina), Collón Curá Fm., Middle Miocene, Colloncuran SALMA.

Measurements: Supporting Information, Table S2.

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