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viewtype=text&itemID=F401&pageseq=1 Vertebrate limbs show homology
Human Cat Whale Homology: parts of two organisms are
attributable to a part present in a common
ancestor. Forelimbs in mammals are homologous.
Campbell 9e, Fig. 22.15 Bat Hyperphalangy in cetaceans Killer whale Sperm whale Right
whale Ichthyosaur Cetaceans (whales, dolphins) have extra digit elements, a
condition known as hyperphalangy.
Cooper et al (2007). Anat. Rec. 290:654–672 Dolphins exhibit hyperphalangy Cooper, L.N. (2009). PhD
dissertation, Kent State Univ. Spotted
dolphin fetus A “hyperactive”
AER in cetaceans
Middle digits seem to
keep forming much
longer in cetaceans
than in other
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This note was uploaded on 11/08/2013 for the course ZOOLOGY 470 taught by Professor Hardin during the Fall '12 term at University of Wisconsin.
- Fall '12