You can read more about the Palaeozoic fish groups in Janvier (1996), a comprehensive and beautifully illustrated book, while papers in Ahlberg (2001) present a variety of current views on basal vertebrate and fish phylogeny. Long (1995) is a well-illustrated, popular history of fishes. Aldridge et al. (1993) and Donoghue et al. (1998, 2000) are excellent overviews of current knowledge about the conodonts and the phylogeny of early vertebrates. Forey (1998) gives a full account of coelacanths and the living Latimeria, and the full story of its discovery is told by Weinberg (1999). Bemis et al. (1986) contains a number of papers about living and fossil lungfishes. There are good reviews of the relationships of sarcopterygians in Schultze and Trueb (1991), Ahlberg (2001) and Clack (2002c)
CHAPTER 4 -
The Early Tetrapods and Amphibians
1 What were the key challenges facing vertebrates when they moved on to the land?
2 Were the first tetrapods adapted to life on land or were they still swimmers?
3 If the first tetrapods had seven or eight fingers and toes, why are five fingers so widespread, and how are the fingers coded genetically?
4 How did tetrapods diversify in the Carboniferous?
5 What do sites of exceptional preservation tell us about early tadpoles?
6 How did the basal tetrapods evolve towards modern amphibians and reptiles?
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