As synapsids continued to evolve during the Permian Period, however, they lost their belly ribs. Creatures like our cynodont ...

Riley Exploration Permian, Inc. is an independent oil and natural gas company. The firm is focused on the acquisition, exploration, development, and production of oil, natural gas, and natural gas ...

Fort Worth-based Double Eagle owns more than 95,000 net acres in the Midland portion of the Permian Basin and is one of the last big assets left in the region, the largest U.S. oil field.

Permian Basin-focused Diamondback Energy emerged as the region’s reigning independent producer giant a year ago following its $26 billion buyout of privately-held Endeavor Energy Resources. That ...