Myogale acromiodeltoideus

WHIDDEN, HOWARD P., 2000, Comparative Myology of Moles and the Phylogeny of the Talpidae (Mammalia, Lipotyphla), American Museum Novitates 3294, pp. 1-53 : 24

M. acromiodeltoideus ( fig. 8 )

ORIGIN: From the anterodorsal margin of the lateral end of the clavicle.

INSERTION: In the deltoid fossa of the humerus, adjacent to the insertion of M. cleidodeltoideus .

REMARKS: This muscle has the same gen­

eral form in Condylura , Neurotrichus , Parascalops , Scalopus , Scapanus , Scaptonyx , Talpa , and Urotrichus . In Condylura , Neurotrichus , Scaptonyx , and Urotrichus , it is well separated from M. cleidodeltoideus and inserts along the distal end of the pectoral ridge. In Uropsilus , it originates from the acromion process of the scapula and inserts on the pectoral ridge, distal to M. cleidodeltoideus . As mentioned above, in Desmana and Galemys , this muscle is apparently fused with M. cleidodeltoideus . Dobson (1882– 1890), Freeman (1886), and Campbell (1939) failed to distinguish this muscle from M. cleidodeltoideus , possibly because of its clavicular origin in talpids other than Uropsilus . Reed (1951) discussed the unusual form of the deltoids in talpids.

Figures

Fig. 8. Ventral view of chest muscles of Parascalops; superficial muscles on left, deeper muscles on right.