<Unknown Taxon>

Freudenthal, Matthijs & Martín-Suárez, Elvira, 2017, A revision of European Plesiosminthus (Rodentia, Dipodidae), and new material from the upper Oligocene of Teruel (Spain), Palaeontologia Electronica 9 (1), pp. 1-25 : 3

the anteroloph in M1; antecingulum, a cingulum ridge at the base of the anteroloph in M1.

V' is the coefficient of variation (Range divided by median) as defined by Freudenthal and Cuenca Bescós (1984).

Photographs were taken on the electron microscope FEI ESEM QUANTA 400 of the ‘Centro de Instrumentación Científica’ of the University of Granada.

Measurements were taken with a Wild M8 binocular microscope, equipped with a mechanical stage with electronic sensors, connected to a computer through a Sony Magnescale measuring unit. The measurement data were processed using a private computer program, written in Visual Basic. Measurements are given in mm.

Locality codes are explained in Table 2 . Other abbreviations are: pcdha = protoconid hind arm; m1, m2, m3 = lower molars; M1, M2, M3 = upper molars.

For some characters morphology values (MV) have been calculated (see Freudenthal, 2004), using the equation

MV = Σ(n-1) fn / (C-1) Σfn,

where C is the number of character states, and fn is the observed frequency for the nth character state. For example, if four character states are distinguished, the consecutive states score 0, 0.333, 0.666, and 1.0, respectively. The scores of all specimens are summed up, and the result is divided by the total number of specimens, leading to a value between 0 and 1. MV is typically useful for features, that in fact have a continuous size representation, e.g., for a length: absent/short /medium/ long, and is an approximation of actually measuring the parameter in each specimen, and calculating the mean of the measurements. It may be calculated on actual numbers of specimens, or on percentages; in the latter case Σfn = 100.