The Pschyrembel Clinical Dictionary alphabetically lists and explains all common/important medical words.
Historically, the predecessor of this work was the Wörterbuch der klinischen Kunstausdrücke, by Otto Dornblüth, M.D., published in 1894 by Veit & Comp.
However, the stone louse is only a fictitious animal created by the German satirical comedian Loriot to parody nature documentaries, and included in the Pschyrembel as a copyright trap, because no genuine medical dictionary (by a different publisher) would include it unless it had been plagiarized.
[3] From a commercial point of view, Pschyrembel not only refers to the popular Pschyrembel Clinical Dictionary, but is the trade name for a series medical reference works published by de Gruyter.
On the other hand, de Gruyter offers further products under the trade name Pschyrembel.