Myogale extensor subsp. carpi

WHIDDEN, HOWARD P., 2000, Comparative Myology of Moles and the Phylogeny of the Talpidae (Mammalia, Lipotyphla), American Museum Novitates 3294, pp. 1-53 : 27

M. extensor carpi ulnaris ( fig. 11 )

ORIGIN: From the lateral epicondyle of the humerus.

INSERTION: Via a tendon on the lateral surface of the second phalanx of digit IV.

REMARKS: This muscle has the same general form in Parascalops , Scalopus , Scapan­

us, and Talpa . In Condylura , Desmana , Galemys , Neurotrichus , Scaptonyx , and Urotrichus , this muscle originates via two heads, one from the lateral epicondyle and the other from the posterior and proximal crests of the olecranon process of the ulna. In these taxa, the insertion is also different, with the tendon attaching to a small sesamoid that overlies the ulnare. In Uropsilus , this muscle originates via two heads, as in the preceding taxa, but it inserts directly on the proximal end of metacarpal V. Reed (1951) offered a possible explanation for the phalangeal insertion of this muscle in Scapanus .

Pectoral Group

Figures

Fig. 11. Dorsal view of forearm muscles of Parascalops. A, Superficial muscles; B, deeper muscles.