Gordii Fossae is a volcanic region near Olympus Mons, the planet’s largest volcano.
The smooth volcanic surfaces in the Gordii Fossae region are sometimes interrupted by long, narrow troughs, or fissures. These fissures form when underground faults, possibly involving magma movement, reach the near-surface, allowing material to collapse into pits or an elongated trough. This fissure appears to have erupted material that flowed onto the surface.
If you use your imagination, this trough resembles a gecko with its long tail and web-shaped feet!