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Pterodactyl Defense: Austrian, Pteranodon is a chess opening that arises after 1.e4 g6 2.d4 Bg7 3.f4 c5 4.c3 Qa5. It is classified B06 in the ECO system, and the position after these moves has white to move.
This line is a variation within the Pterodactyl Defense family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.e4 g6 2.d4 Bg7 3.f4 c5 4.c3 Qa5.