Fish scale development: Hair today, teeth and scales yesterday?

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Presentation transcript:

Fish scale development: Hair today, teeth and scales yesterday? Paul T Sharpe Current Biology Volume 11, Issue 18, Pages R751-R752 (September 2001) DOI: 10.1016/S0960-9822(01)00438-9

Fig. 1 Basic structure and possible evolutionary relationship between vertebrate ectodermal/dermal appendages. Hair follicles are ectodermally derived and are believed to have evolved from reptile scales. Teeth and teleost scales are dermally derived and may have evolved from a common ancestor, the dermal armour of ancient fishes. The EDA/EDAR cell–cell signalling interaction is required for the development of hair, scales and teeth. Current Biology 2001 11, R751-R752DOI: (10.1016/S0960-9822(01)00438-9)