Armantomys cf. jasperi Daams, 1990

Ruiz-Sánchez, Francisco J., Murelaga, Xabier, Larrasoaña, Juan C., Freudenthal, Matthijs & Garcés, Miguel, 2012, Hypsodont Myomiminae (Gliridae, Rodentia) from five new localities in the Lower Miocene Tudela Formation (Bardenas Reales, Ebro Basin, Spain) and their bearing on the age of the Agenian-Ramblian boundary, Geodiversitas 34 (3), pp. 645-663 : 656-657

Armantomys cf. jasperi Daams, 1990 ( Fig. 4N )

HOLOTYPE. — COR 70, left M2 (in Daams 1990: pl. 2; fig. 17).

TYPE LOCALITY. — Córcoles, Loranca Basin, Spain.

LOCALITY AND AGE. — Cuesta Agujeros 4 ( CA 4), Province of Navarre, Spain. Ramblian (Local zone A, MN 3).

MATERIAL AND MEASUREMENTS. — CA 4-1/27, incomplete right m2.

DESCRIPTION

m2

Anterolophid long and separated from the protoconid by a narrow and deep furrow. Near the metaconid, the anterolophid is partially interrupted, thus forming a short posterior spur. Metalophid high connected to the metaconid. The metalophid is continuous with a short fold directed towards the anterolophid, but not connected to that ridge. Centrolophid absent.

REMARKS

The presence of a short longitudinal spur on the posterior wall of the anterolophid is described in the m2 of A. jasperi from its type locality, Córcoles ( Daams 1990). This morphology has not been mentioned in other populations of medium-sized Armantomys species. Therefore, the presence of a short spur on the posterior wall of the anterolophid and the width of the specimen indicate that it belongs to A. jasperi . Nevertheless, the scarcity of material and its fragmentary state do not allow a certain assignment.

Figures

FIG. 4. — A-E, Armantomys cf. bijmai from Cabezo Hermoso 1 (CH1): A, left M2,CH1-6;B, right M3,CH1-8; C, right P4,CH1-4;D, right D4, CH1-5; E, right m1, CH1-3; F-M, Armantomys daamsi from Cuesta Agujeros 2 (CA2): F, left M1, CA2/1-6; G, right M2, CA2/1-5; H, right M2, CA2/2-6; I, right M3, CA2/1-15; J, right P4, CA2/1-12; K, left m1, CA2/1-8; L, left m1, CA2/1-10; M, right m3, CA2/2-5; N, Armantomys cf. jasperi from Cuesta Agujeros 4 (CA4), fragmentary right m2, CA4/1-27; O, P, Armantomys cf. parsani from Cuesta Agujeros 3 (CA3): O, left M2, CA3-1; P, left P4, CA3-2; Q, R, Armantomys cf. daamsi from Cabezo Carboneras 1 (CC1): Q, right M1, CC1-31; R, left M2, CC1-38; S, cf. Praearmantomys crusafonti from Cabezo Carboneras 1 (CC1), right m3, CC1-22. Scale bar:1 mm.