Myogale abductor subsp. digiti

WHIDDEN, HOWARD P., 2000, Comparative Myology of Moles and the Phylogeny of the Talpidae (Mammalia, Lipotyphla), American Museum Novitates 3294, pp. 1-53 : 32

M. abductor digiti quinti

ORIGIN: From the distal surface of the pisiform.

INSERTION: On the lateral side of a sesamoid that lies on the palmar surface of the metacarpo­phalangeal joint of digit V.

REMARKS: I found this tiny muscle in Uropsilus and Desmana and in some specimens of Condylura , Parascalops , and Scapanus . In Uropsilus , the palmar sesamoids between the metacarpals and the proximal phalanges are paired, and this muscle inserts on the lateral sesamoid associated with digit V. The variable occurrence of this muscle in Condylura , Parascalops , and Scapanus may reflect individual variation, or it may be the result of poor specimen preservation or observational error.