FIGURE 2 in Concentrated evolutionary novelties in the foot musculature of Odontophrynidae (Anura: Neobatrachia), with comments on adaptations for burrowing

FIGURE 2. Plantar view of the left foot of Odontophrynus americanus (MACN 48528). A. Original photograph of Figure 2B. B. sLBB II–IV are the supplementary slips (characters 6–8) of the LBB II–IV (medial slip) with a fleshy insertion on metatarsi II–IV. Removed elements: TS I–V, LBL III–V, LLG IV, LBB II, LBB III, mLBB IV, distal portion of FBS and laterodistal region of APLA (over the plantar cartilage, PC). C. Original photograph of Figure 2D. D. Note the LBB III (dissected at the insertion point and held with a forceps), and it associated supplementary slip with fleshy insertion on Metatarsus III (indicated as sLBB III). The LBB III and the sLBB III have a common origin from the APLA and diverge distally. The same morphology as shown in LBB III and the sLBB III is also present in the LBB II and mLBB IV and their associated sLBB II and IV respectively. Removed elements: TS I–V, LBL III–V, LLG IV, distal portion of FBS and laterodistal region of APLA (over PC). Note that in B and D only the distal region of the APLA is shaded (not proximally) for a better understanding of its relationship with the origin of the LBB II–IV. Finally, note that the origin of the LBB II is also from the APLA (not evident in the figure), as in LBB III and mLBB IV; since the mediodistal region of the APLA is covered by the PH, it gives the false impression of an origin from the PH. Abbreviations as indicated in Material and Methods. Scale bars = 1 mm.