ECO A42
Pterodactyl Defense
The position after 1.Nf3 c5 2.c4 g6 3.d4 Bg7 4.e4 Qa5+ 5.Nc3 d6.
1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+ 5. Nc3 d6
Pterodactyl Defense is filed under ECO A42. It is the position after 1.Nf3 c5 2.c4 g6 3.d4 Bg7 4.e4 Qa5+ 5.Nc3 d6 — 10 half-moves in, with White to move. Named theory ends here; beyond this the position is yours to work out.