Psychrophrynella wettsteini species without known major threats. Psychrophrynella wettsteini Psychrophrynella wettsteini is a species of frog in the family Craugastoridae. It is endemic to Bolivia and only known from the region of Unduavi in the Unduavi Valley, Sud Yungas Province, La Paz Department. Common name Wettstein's Andes frog has been coined for it. It is named for Otto von Wettstein, Austrian zoologist. "Psychrophrynella wettsteini" is a comparatively large species (maximum snout–vent length ) and has a robust body and long limbs. The snout is rounded. The tympanic membrane is absent, whereas the tympanic annulus is visible through the skin. Tips of the
Eggshell membrane membrane is derived commercially from the eggshells of industrial egg processors. In the United States, egg-breaking facilities generate more than 24 billion broken eggshells every year. There are various ways in which the membrane of an eggshell is separated from the shell, including chemical, mechanical, steam, and vacuum processes: see Eggshell and protein membrane separation. It may be prepared for use as a dietary supplement. The isolated membrane is partially hydrolyzed and dried to produce a powder, that is distributed as eggshell membrane (EM) for use as a dietary supplement. Eggshell membrane Eggshell membrane or shell membrane is the clear