HOUSTON: PetroTal Corp. has been informed by Gran Tierra Resources Ltd. (GTRL), a control person of PetroTal, that GTRL has entered into a private agreement with Remus Horizons PCC Limited in respect of the purchase by Remus of 218,012,500 common shares of PetroTal at a price of GBP0.099385 per Purchased Share, for an aggregate purchase…