Fossil of a bat (Palaechiropteryx Tupaidon), Middle Eocene, about 47 million years old, Grube Messel, Darmstadt, L. 7 cm, the exposed fossil was prepared by the conversion-plastic-transfer method, prepared in detail in relief, bone structure partly supplemented and brown redrawn, plate approx. 18.5x15cm; see Lit.: The pit Messel, Behnke, Eikamp, Zollweg, S. 143ff, collectw., museum; the pit Messen was recognized by UNESCO as a world heritage, altogether one of only three sites worldwide