Examples: wisdom teeth in humans; the loss of pigment and functional eyes in cave fauna; the loss of structure in endoparasites.

The cave fauna thus represent, at least in part, relicts.

Vjetrenica cave is considered to have richest cave fauna, with highest rate of endemism.

The olm was first protected in Slovenia in 1922 along with all cave fauna, but the protection was not effective and a substantial black market came into existence.

Saulcy specialised in cave fauna.

Bokor worked on cave fauna.

These contributing factors play an especially important role in determining the internal conditions that foster cave fauna.

O. antillarum is common in subfossil cave faunas and is also known from three specimens collected live in the 19th century.

Although it is one of the shorter caves, it is known for its rich stalactite decoration, as well as for its cave fauna.

In 1986 the researcher Irish John, who worked as an entomologist at the National Museum of Namibia did speleological research on cave fauna.