Figure 4 in Prepollex diversity and evolution in Cophomantini (Anura: Hylidae: Hylinae)

Figure 4. Dorsal hand musculature showing variation on the insertion of the m. abductor pollicis longus (highlighted in brown; tendons of insertion in white; m. extensor digitorum removed). A, Myersiohyla chamaeleo MZUSP 159198; B, Hyloscirtus palmeri ICN 20087; C, Aplastodiscus perviridis UFMG 9851; D–E, Boana semilineata CFBH 13013; F, Boana pombali CFBH 36791. Two insertions, one on metacarpal II and other, wider, on the prepollex in (A) and (F); one tendon on metacarpal II in (B) and (C); two tendons on metacarpal II in (D, E). In (D) the muscle is intact and seems to present only one insertion, but after dissecting its origin and deflecting the muscle (E) it is possible to see the two insertions on metacarpal II. (B, D–F) right hand; (A, C) left hand (reflected for easier comparison with the remaining figures). Scale bars 1 mm.