The strongly built, probably coriaceous, border is already known in the Carboniferous genus Meganeura. ... Diagrams to show t In- .structure of the radius and media in Protodonata: a, suggested ancestral condition, from which there can he derived: a b, the ... with the radial sectors eliminated but the media not reduced. these two sectors were to fuse together, we might expect to get some such formationanbsp;...
Title | : | Mesozoic Insects of Queensland |
Author | : | Robin John Tillyard, Benjamin Dunstan |
Publisher | : | - 1924 |
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