Located in Northern Pyrenees, the Arbas massif, France, system of Coume Ouarnède, also known as Réseau Félix Trombe—Henne Morte, is longest and most complex cave France. The system, developed massive Mesozoic limestone, has two distinct resurgences. Despite relatively limited sampling, its subterranean fauna rich, composed a number local endemics, terrestrial well aquatic, including remarkable ...