Miostrellus sp.

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 : 432

cf. Miostrellus sp.

Text-fig. 8h, i

M a t e r i a l. Erkertshofen 2: BSP 1974 XIV 1207, right P4, 1.00 × 1.00; BSP 1974 XIV 1203, left m1, 1.30 × 0.75 × 0.80.

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 P4 crown from Erkertshofen 2 (specimen BSP 1974 XIV 1207) is compressed in the anteroposterior direction with a weakly pronounced anterolingual cuspid on the cingulum but without a posterolingual talon ( Text-fig. 8i ). All these features differentiate the P4 from Erkertshofen 2 from those of Myotis and Plecotus . It differs from Submyotodon petersbuchensis ( Ziegler 2003: 478, fig. 6(7)) in being larger ( Ziegler 2003: 480–481, tab. 8), in having a less developed anterolingual cuspid on the cingulum and in lacking the posterolingual talon. The P4 from Erkertshofen 2 morphologically is similar to M. aff. noctuloides from Sandelzhausen (specimen BSP 1959 II 7756; Ziegler 2000: 127, pl. 10, fig. 119) but differs in being larger ( Tab. 8) and in having a small anterolingual cuspid on the cingulum. On the other hand, it is similar in size to M. petersbuchensis ( Tab. 8) which, however, has no anterolingual cuspid of the cingulum (compare with Rosina and Rummel 2012: 471, fig. 5A). The m1 from Erkertshofen 2 (specimen BSP 1974 XIV 1203) shows an elongated, but somewhat curved, paralophid and a wide trigonid, that indicate it most likely does not belong to Myotis , but to Miostrellus . It is larger than M. risgoviensis , but smaller than both the M. petersbuchensis and E. aurelianensis and closest in size to M. noctuloides from Sansan ( Tab. 8).

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.