Eptesicus cf. aurelianensis ZIEGLER , 1993

Rosina, Valentina V. & Rummel, Michael, 2019, The Early Miocene Bats (Chiroptera, Mammalia) From The Karstic Sites Of Erkertshofen And Petersbuch 2 (Southern Germany), Fossil Imprint 75 (3 - 4), pp. 412-437 : 428

Eptesicus cf. aurelianensis ZIEGLER, 1993

Text-fig. 8g

M a t e r i a l a n d m e a s u r e m e n t s. Erkertshofen 1: BSP 1962 XIX 4197, right M2, 1.45 × 1.90.

Petersbuch 2: BSP 1980 XXII 5366, right M2, ≈1.45 × ≈1.90

D e s c r i p t i o n a n d c o m p a r i s o n. The M2 crowns from Erkertshofen 1 and Petersbuch 2 show a welldeveloped cingulum and paralophs ( Text-fig. 8g 1 ). The absence of a large hypocone suggests that the tooth belongs to a vespertilionid bat. Both molars have para- and metalophs but lack the paraconules. The trigon basins are closed, the hypocones are weakly developed ( Text-fig. 8g ). The upper molars from Erkertshofen 1 and Petersbuch 2 share these features with Miostrellus or Eptesicus . Nevertheless, they are larger than all Miostrellus species ( Tab. 8) and, thus, more similar in size to E. aurelianensis (compare with e.g. specimen SMNS 45744 H1; Ziegler 1994: 113, pl. 5, fig. 6). However, they differ from E. aurelianensis in having some undulated metaloph and a less developed hypocone (Textfig. 8g 2).

Figures

Text-fig. 8. a, o – Miostrellus petersbuchensis, Petersbuch 28: a – NMA P28/0335, right maxillary bone with P4–M3, holotype, ventral view; o – NMA P28/0449, right mnd with C inf., p4–m3, occlusal view; b–f, k, n – M. cf. noctuloides: b – BSP 1962 XIX 4198, right M3, Erkertshofen 1, occlusal view; c – BSP 1962 XIX 4195, left M1, Erkertshofen 1, occlusal view; d – PCMRCh4, left C sup., Petersbuch 2, lingual (d1) and occlusal (d2) views; e – BSP 1974 XIV 1204, left C sup., Erkertshofen 2, occlusal (e1) and lingual (e2) views; f – PCMRCh23, right P4, Petersbuch 2, occlusal view; k – BSP 1974 XIV 1200, right C inf., Erkertshofen 2, occlusal view; n – BSP 1962 XIX 4192, right mnd with m1–2; Erkertshofen 1, lateral (n1) and occlusal (n2) views; g – Eptesicus cf. aurelianensis, BSP 1962 XIX 4197, right M2, Erkertshofen 1, occlusal view; h, i – cf. Miostrellus sp., Erkertshofen 2: h – BSP 1974 XIV 1203, left m1, occlusal view; i – BSP 1974 XIV 1207, right P4; j, l, m – Miostrellus cf. petersbuchensis, Petersbuch 2, occlusal views: j – PCMRCh5, left m1; l – PCMRCh7, left p4; m – PCMRCh6, right mnd with m1.

Text-fig. 1. Megaderma franconica, Petersbuch 2: a – BPS 1976 XXII 4147, right mxl with P4–M3, ventral view; b – BSP 1976 XXII 4112, left mnd with m2–3, lateral view; c – BSP 1976 XXII 4124, left mnd with p2–m1, (c1) lateral view, (c2) occlusal view; d – BSP 1976 XXII 4110, right mnd with p4–m3, (d1) occlusal view, (d2) lateral view.