Above: Wing configuration according to Elgin, Hone and Frey (2011) in which they design the wing trailing edge to extend to the ankles. That is only the first of many miscalculations, misidentifications and mistakes made by this team. The correct version (badly characterized by Elgin, Hone and Frey (2011, lower right) is shown below.

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Bennett SC 2007b. A second specimen of the pterosaur Anurognathus ammoni. Paläontologische Zeitschrift 81: 376-398.

Elgin RA, Hone DWE and Frey E 2011. The extent of the pterosaur flight membrane. Acta Palaeontologica Polonica 56 (1), 2011: 99-111. doi: 10.4202/app.2009.0145

Peters D 2002. A New Model for the Evolution of the Pterosaur Wing – with a twist. - Historical Biology 15: 277–301.