Figure 5 in Morphological evidence for sister group relationship between flamingos (Aves: Phoenicopteridae) and grebes (Podicipedidae)

Figure 5. Hypotarsus in comparison. (A) Phoenicopterus chilensis (Phoenicopteridae); (B) Palaelodus sp. (Palaelodidae, SMF Av182c); (C) Aechmophorus occidentalis (Podicipedidae). Not to scale. The numerals indicate the furrows/canals for the tendons of: 1, musculus flexor digitorum longus; 2, musculus flexor perforatus digiti II; 3, musculus flexor perforans et perforatus digiti II; 4, musculus flexor hallucis longus. Homology of tendineal furrows/canals was verified against spirit specimens for Phoenicopteridae (J. Bosch, pers. comm.) and deduced from position of bony canals for the other taxa. Note that identification of tendineal furrows/canals departs from Strauch (1978: fig. 29). Not to scale.