Mogera biceps subsp. brachii

WHIDDEN, HOWARD P., 2000, Comparative Myology of Moles and the Phylogeny of the Talpidae (Mammalia, Lipotyphla), American Museum Novitates 3294, pp. 1-53 : 29

M. biceps brachii ( fig. 12 )

ORIGIN: As a long tendon from the coracoid border of the rim of the glenoid fossa of the scapula. This tendon passes through a bicipital tunnel as it crosses the proximal end of the humerus.

INSERTION: On the ulnar surface of the middle of the radius.

REMARKS: This muscle has the same general form in Parascalops and Talpa , and is similar in Scalopus and Scapanus except that the insertion is via two slips, which are separated by M. pronator radii teres. Condylura , Desmana , Galemys , Neurotrichus , Scaptonyx , and Urotrichus are essentially similar, except that the insertion is at the proximal end of the radius. In Uropsilus , this muscle has two heads of origin, one from the tip of the coracoid process and the other via a long

tendon from the rim of the glenoid fossa; insertion is on the ulnar surface of the proximal radius. Also, in Uropsilus , the long tendon of origin travels through a bicipital groove as it crosses the proximal end of the humerus, instead of through a tunnel as in the other study taxa.

Figures

Fig. 12. Ventral view of forearm muscles of Parascalops.