Atelopus pachydermus and mean "thick skin". Common name Schmidt's stubfoot toad has been coined for this species, in reference to Eduard Oscar Schmidt who described the species. An alternative common name is Oyacachi jambato toad. Adult males measure and adult females, based on two specimens only, in snout–vent length. The snout is acuminate. The tympanic membrane is absent. The fingers have no webbing whereas the toes are webbed. The dorsum is covered by widely scattered or dense well-defined, rounded warts. The dorsum is yellow and has a dark brown pattern of marks, blotches and/or lines. The venter is white, sometimes orange or
Dirac membrane Dirac membrane A model of a charged membrane introduced by Paul Dirac in 1962. Dirac's original motivation was to explain the mass of the muon as an excitation of the ground state corresponding to an electron. Anticipating the birth of string theory by almost a decade, he was the first to introduce what is now called a type of Nambu–Goto action for membranes. In the Dirac membrane model the repulsive electromagnetic forces on the membrane are balanced by the contracting ones coming from the positive tension. In the case of the spherical membrane, classical equations of motion imply that the