Fig. 6.

Muscle mass ratios of elbow joint extensors (Ex) and flexors along the brachium (Fl₁) and antebrachium (Fl₂). The length of each bar represents the relative mass of each muscle, when the total mass of the extensors and flexors of an individual is 100% (see bottom bar for abstract example). No data were obtainable for taxa in types D and E. Asterisks indicate juvenile specimens. (1) M. triceps brachii (1a, long head; 1b, lateral head; 1c, medial head; 1d, accessory head; 1e, intermediate head); (2) M. dorsiepitrochlearis; (3) M. anconeus; (4) M. epitrochleoanconeus; (5) M. flexor carpi ulnaris. A, M. biceps brachii (A₁, short head; A₂, long head); B, M. brachialis; C, M. brachioradialis (C₁, short head; C₂, long head); D, M. extensor carpi radialis; E, M. cleidobrachialis; F, M. ectoantebrachialis; G, M. supinator; H, M. pronator teres; I, M. flexor carpi radii; J, M. flexor digiti profundus; K, M. flexor digiti sublimis. See institution abbreviations in Tables 1 and 2.