FIGURE 4. A in Concentrated evolutionary novelties in the foot musculature of Odontophrynidae (Anura: Neobatrachia), with comments on adaptations for burrowing

FIGURE 4. A. Dorsal view of the left foot of Odontophrynus occidentalis (MACN 38689). Note the sEBS I, with a common insertion on PH with the EBS I. B. Dorsal view of the left foot of O. carvalhoi (MZUSP 98179), the EBS I with origin on the tibiale is absent in this species. C. Dorsal view of the right foot of Rhinophrynus dorsalis (MACN 39131). Note the presence of a well-developed EBM I from the tibiale. D. Dorsal view of the right foot of Uperodon systoma (KU 193677). The element indicated as "X" is an unidentified slip with origin from the tibiale and insertion on PH (in common with the EBS I). Abbreviations as indicated in Material and Methods. Scale bars = 1 mm.