Armantomys cf. parsani 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

Armantomys cf. parsani Daams, 1990 ( Fig. 4 O-P)

HOLOTYPE. — RGM 337 724, left M1 (in Daams 1990: pl. 1; fig. 4).

TYPE LOCALITY. — Ramblar 1, Calatayud-Teruel Basin, Spain.

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

MATERIAL AND MEASUREMENTS (L × W). — CA 3-2 (10.53 × 13.86), left P4; CA 3-1 (13.58 ×), 1 fragmentary left M2; CA 3-7, 1 fragmentary and not measurable left M3.

DESCRIPTION

P4

The anteroloph is reduced to two cusps, a short and low labial cusp and a medium-low central cusp. Protoloph continuous, low connected to the protocone. Metaloph transverse and separated from the protocone by a narrow and deep furrow near the protocone. Posteroloph long, low connected to the protocone and separated from the metacone.

M2

Anteroloph continuous with a short posterior spur, directed to the protoloph. The protoloph has two anterior spurs, directed towards the anteroloph but not connected to it. The metaloph joins the protoloph, forming a Y-pattern shape. Posteroloph transverse and low connected to the protocone.

M3

Anteroloph connected to the paracone and separated from the protocone by a narrow and deep furrow. Protoloph and metaloph form a Y-pattern. The middle of the protoloph has a short anterior spur directed towards the anteroloph.

REMARKS

In the upper portion of the Cuesta Agujeros section, the locality CA3 has provided a small collection of Armantomys remains. The large anterocone of P4, the absence of centrolophs in M2 and the presence of spurs in the anteroloph of M2 and the protoloph of M3 are very similar to what Daams (1990) described for A. parsani from its type locality and other sites that contain this species.

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.