Potamarchus sp.

Kerber, Leonardo, Negri, Francisco Ricardo, Ribeiro, Ana Maria, Vucetich, Maria Guiomar & Souza-Filho, Jonas Pereira De, 2016, Late Miocene potamarchine rodents from southwestern Amazonia, Brazil-with description of new taxa, Acta Palaeontologica Polonica 61 (1), pp. 191-203 : 196-197

Potamarchus sp.

SOM 1: fig. S3.

Material.— UFAC 2785, left P4, Talismã, Purus River; UFAC 5426, right M2, Juruá River; UFAC 3365, left M3, Talismã, Purus River (see Latrubesse et al. 2010 for details); UFAC 3249, right p4, Lula, near Sena Madureira; UFAC 4508, right m3, Patos (= Acre 6 and LACM locality 4611; see Bocquentin and Melo 2006; Cozzuol 2006; Cozzuol et al. 2006; Kay and Cozzuol 2006 for details), Acre River, State of Acre, Brazil, Solimões Formation, Late Miocene ( Tables 2 and 3; SOM 1: fig. S3).

Description.—The specimens included here are isolated teeth of uncertain specific attribution. UFAC 2785 is a left P4 with six lophs without crenulation and with little wear ( SOM 1: fig. S3A). UFAC 5426 is a right M2 with six lophs showing crenulation in the distal enamel layer of each loph ( SOM 1: fig. S3B). UFAC 3365 is a left M3, with six lophs. Its lophs are not as curved as seen in P. adamiae sp. nov ( SOM 1: fig. S3C). UFAC 3249 is a right p4 with five lophids ( SOM 1: fig. S3D). The first lingual flexid is closed, forming a fossetid with a crenulated outline. UFAC 4508 is a right m3 with six lophids ( SOM 1: fig. S3E). All the lingual flexids are open and there is no crenulation. The lophids are oblique and are more compressed and less curved than the pattern seen in older specimens of P. murinus (e.g., UFAC 1820).