Submyotodon petersbuchensis ZIEGLER , 2003

Rosina, Valentina V. & Rummel, Michael, 2017, The New Early Miocene Bat Records From The Molasse Sites Of South Germany, Fossil Imprint 73 (3 - 4), pp. 227-235 : 230

Submyotodon petersbuchensis ZIEGLER, 2003

Text-fig. 1c

M a t e r i a l a n d m e a s u r e m e n t s. Rembach, BSP 1959 XXVIII630-3, the right dentary fragment with m3 0.95 × 0.6 × 0.55; Hmdm3 = 1.05.

D e s c r i p t i o n. A delicate and very small dentary fragment, broken behind the m3 and at the alveolar margin of m2. The trigonid part of the crown is partly damaged. The postcristid is very low, and the hypoconulid is very tiny. However, it can be seen that the postcristid joins the entoconid, thus, the m3 is myotodont. The paralophid is slightly curved. The cristid obliqua and the postcristid both show visible grooves.

C o m p a r i s o n. The myotodont crown with a welldeveloped cingulid suggests that the fossil represents a member of the family of Vespertilionidae . This very tiny specimen shares the following features with S. peterbuchensis (MN 6, Petersbuch, Germany; Ziegler 2003): a very small size, a visibly compressed trigonid, almost unreduced talonid, curved lophids and cristids, and the appearance of visible grooves in cristids. The last trait is very typical of Submyotodon , which differentiates this taxon from the Myotis -species. Direct comparison of the fossil under study with M. cf. helleri KOWALSKI, 1962 from the Middle Miocene site of Petersbuch (CoMR P10-00594.2; see also Ziegler 2003) shows that the Rembach fossil is smaller (1.14 × 0.70 × 0.57 for the m3 of the specimen of P10-00594.2; Ziegler 2003: 476). It further differs from M. cf. helleri from Petersbuch in a less reduced talonid. According to all of the morphological features listed above, this Rembach specimen can be associated with S. petersbuchensis .

R e m a r k s. Morphology of the talonids of the m3s of S. petersbuchensis is variable: most of them exhibit the myotodont condition, as in the specimen under study, and only some of them are submyotodont ( Ziegler 2003: 479).

Figures

Text-fig. 1. a – cf. Hesperoptenus (sp. n.), right M1, BSP 1959 XXVIII630-1, Rembach, occlusal view; b – cf. Vespertilio (sp. n.), right C sup., BSP 1959XXVIII630-2, Rembach; c – Submyotodon petersbuchensis, fragment of right dentary with m3, BSP 1959 XXVIII630-3, Rembach, occlusal view; d – Miostrellus (sp. n.), left m3, BSP 1959 XXVII-Ch10, Forsthart, occlusal view; e – Miostrellus (sp. n.), right M1, BSP 1959 XXVII-Ch1, Forsthart, occlusal view; f – Miostrellus cf. risgoviensis, right M2, BSP 1959 XXVII-Ch2, Forsthart, occlusal view; g – Miostrellus (sp. n.), left M3, BSP 1959 XXVII-Ch3, Forsthart, occlusal view; h – Myotis sp., left m1, BSP 1959 XXVII-Ch9, Forsthart, occlusal view; i – Miostrellus cf. risgoviensis, right C sup., BSP 1959 XXVII- Ch8, Forsthart; j – M. cf. risgoviensis, right C sup., BSP 1959 XXVII-Ch7, Forsthart; k – cf. Miostrellus sp., right C sup., BSP 1959XXVII-Ch4, Forsthart; l – Myotis sp., left C sup., BSP 1959 XXVII-Ch5, Forsthart; m – Miostrellus (sp. n.), right C sup., BSP 1959 XXVII-Ch6, Forsthart; 1 – lingual view, 2 – occlusal view.