Myoglis antecedens Mayr 1979
Creators: name: Crespo, Vicente Daniel
name: Ríos, María
name: Marquina-Blasco, Rafael
name: Montoya, Plini
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Rodentia
Gliridae
Myoglis
Myoglis antecedens

description: Myoglis cf. antecedens Mayr, 1979
(Fig. 10 AA, AB)
LOCALITY. — MAB3.
MATERIAL. — MAB 3: 1 P4, 1 M3.
MEASUREMENTS. — Appendix 17.
DESCRIPTION
P4 (MAB3)
Tooth with subtriangular shape in occlusal view, with a flat surface and with right and wide crests and narrow valleys. The anteroloph is long and connected to the protoloph in both of its sides. The endoloph is complete. The protoloph is long. The precentroloph is of short-medium size. The postcentroloph is long. The metaloph is straight and short. The posteroloph is semicircular and it is connected to borh sides of the metaloph. The cusps are not clearly distinguished.
M3 (MAB 3)
Broken tooth with a subtrapezoidal outline and with wide crests and narrow valleys; the crests are curved backwards in the lingual side.The endoloph and the ectoloph are not visible. The anteroloph is long. There is an anterotrope that extends throughout the whole width of the tooth. The protoloph is long. The posterior precentroloph ends near the lingual side. The postcentroloph is slightly shorter than the precentroloph. The metaloph is long and there is a small posterotrope.
REMARKS
The remains of this taxon are very scarce and poorly preserved in the Ribesalbes-Alcora Basin. This genus is characterized by a wide crest with a narrow valley and in the upper molars the crests are curved backwards in their lingual part (Daxner-Höck 2005). The record of Myoglis spans from the MN2b in the site of Lespignan (France), to the MN10, in the sites of Richardhof Wald and Schernham (Germany; Daams 1999a; Daxner-Höck 2005). In the Iberian Peninsula, its record extends between the MN4, in the site of Rubielos de Mora (Daams 1985), and the MN 9 in the site of Can Llobateres (Agustí 1982).
The only species of this genus whose presence is clearly confirmed in the MN4 of Europe is M. antecedens, although its fossil record surpasses the MN4 (Nemetschek & Mörs 2003; Daxner-Höck 2005). This species has a wide distribution and has been found in the MN4 of Central Europe (Fejfar 1989; Daams 1999a; Kowalski & Rzebik-Kowalska 2002), Portugal and Spain, more specifically in the site of Rubielos de Mora (De Bruijn & Moltzer 1974; Mayr 1979, Antunes 1984; Nemetschek & Mörs 2003). Furthermore, remains of an undetermined species of Myoglis have been found in the site of San Roque 1 (MN4; Calatayud-Montalbán Basin (Van der Meulen et al. 2012), and this genus is present in the Vallès-Penedès Basin (Casanovas-Vilar et al. 2016).
The material from MAB 3 is similar in size to the oldest populations of Myoglis, and particularly M. antecedens, whereas it is clearly smaller and with a simpler dental pattern than that of the younger species Myoglis meini De Bruijn, 1966 (De Bruijn 1966), also occurring in the Iberian Peninsula (Daams & De Bruijn 1995; Daams 1999a). Therefore, and because of the scarcity of the material, we have decided to leave it in open nomenclature as Myoglis cf. antecedens.
description: Published as part of Crespo, Vicente Daniel, Ríos, María, Marquina-Blasco, Rafael & Montoya, Plini, 2023, They are all over the place! The exceptional high biodiversity of dormice in the Early Miocene of the Ribesalbes-Alcora Basin (Spain), pp. 589-641 in Geodiversitas 45 (20) on page 621, DOI: 10.5252/geodiversitas2023v45a20, http://zenodo.org/record/10137206