Cave habitats
Cave hygropetric
Somewhere in between terrestrial and aquatic habitat there is a special habitat of cave hygropetric. Cave hygropetric is a place on cave walls where thin layer of water permanently flows. In such habitat special cave coleopterans like those from genuses Radziella, Croatodirus and Hadesia can be found. Interesting cave leech Croatobranchus mestrovi , which is on the logo of the Croatian Biospeleological Society is also inhabitant of cave hygropetric. Coleopterans have developed some special mouth structures that helps them to filtrate small organic matters from the water. Cave hygropetric is usually far away from the cave entrances and very often very deep in pits, consequently it is very poorly explored and it is probably inhabited by new and undiscovered species.
