. Breviora. BREVIORA No. 361. Figure 2. Argyrolagus scagliai Simpson, 1970. , right M^. Occlusal view, diagrammatic sketch. Approximately X 10. Argyrolagus parodii Rusconi, 1933 Neotype. MLP 62-V11-27-81, right mandibular ramus with I^, alveolus of I., and PfM,, from the Playa las Palomas, near the Balneario Chapadmalal. Collected by the personnel of MLP in August, 1961. Revised diagnosis. Smaller than A. palmeri or A. scagliai. Trigonids somewhat more triangular, paraconids medial. Talonids relatively short. Labial and lingual sulci directly opposite. Talonid of Mj somewhat
. Breviora. BREVIORA No. 361. Figure 2. Argyrolagus scagliai Simpson, 1970. , right M^. Occlusal view, diagrammatic sketch. Approximately X 10. Argyrolagus parodii Rusconi, 1933 Neotype. MLP 62-V11-27-81, right mandibular ramus with I^, alveolus of I., and PfM,, from the Playa las Palomas, near the Balneario Chapadmalal. Collected by the personnel of MLP in August, 1961. Revised diagnosis. Smaller than A. palmeri or A. scagliai. Trigonids somewhat more triangular, paraconids medial. Talonids relatively short. Labial and lingual sulci directly opposite. Talonid of Mj somewhat reduced, but decidedly larger than in Microtra- gulus. Buccal extension of coronoid crest strong. Discussion. In a letter written shortly before his lamented death, Sr. Rusconi informed me that the holotype of this species, in his private collection, had been destroyed. The available figures and description of that holotype are somewhat equivocal, as dis- cussed in Simpson, 1970: 14-15. There is little doubt, however, that MLP 62-Vn-27-81 does belong to the same species. It is very close to the size indicated by Rusconi in text and figures, as here shown in Table 4, and it also shares the most likely morpho- logical distinctions of the holotype. The present specimen can be confidently referred to Argyrolagus and it shows that A. parodii is distinct from any other known species—both points left in some doubt by the destruction of the holotype. This case meets all the conditions for designation of a neotype set forth in Article 75(a) of the International Code of Zoological Nomenclature adopted by the XV International Congress of Zoology, and the present treatment supplies all the qualifying conditions specified in Article 75(c) of the Code. The locality where the holotype was found is not precisely known but was somewhere along the shore four or five kilometers. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readab
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