Neobisium

Identification key for the cavernicolous Neobisium View in CoL species in Georgia

1. Pedipalpal femur granulate..............................................................................2.

- Pedipalpal femur smooth...............................................................................3.

2. Epistome strong, triangular. Pedipalpal femur 5.17–5.91, patella 2.95–3.88 times longer than wide. Tergites I–II each with 6 setae. Kozmani Cave (Imereti Region, Georgia)................................ Neobisium (N.) kozmaniense sp. nov.

- Epistome very small, almost flat. Pedipalpal femur 9.23 times, patella 7.33 times longer, than broad. Tergites I–II each with 4. Sakajia Cave (Imereti Region, Georgia)................................ Neobisium (N.) sakadhzianum Krumpál, 1984 .

3. Pedipalpal femur less than 7.5 times longer than wide........................................................4.

- Pedipalpal femur more than 7.5 times longer than wide.......................................................5.

4. Only the anterior eyes visible. Ratio between movable chelal finger and hand × 1.10; pedipalpal femur length/width × 4.70; length of chela 1.94 mm. Sakishore Cave (Racha-Lechkhumi and Kvemo Svaneti Region, Georgia)........................................................................................... Neobisium (N.) sakishorense sp. nov.

- Anterior eyes with flattened lens, posterior eyes reduced to weak eye spots. Ratio between movable chelal finger and hand × 1.14–1.46; pedipalpal femur length/width ratio × 5.22–6.25; length of chela 2.41–2.54mm. Kotias Klde Cave and Zakarias Klde shaft (Imereti Region, Georgia)........................................... Neobisium (N.) kotiasense sp. nov.

5. Epistome long and pointed. Fixed chelal finger with about 150 teeth. Krubera-Voronya and Tarkili caves (Abkhazia Region, Georgia).......................................................... Neobisium (B.) birsteini ( Lapschoff, 1940) .

- Epistome small. Fixed chelal finger with less than 120 teeth...................................................6.

6. Posterior edge of carapace with 6 setae. Preocular microsetae absent. Gogoleti, Sataplia I and Nikortsminda caves (Imereti Region, Georgia)...................................................... Neobisium (B.) verae ( Lapschoff, 1940) .

- Posterior edge of carapace with 4 setae. One preocular microseta on each side. Tetra Cave (Imereti Region, Georgia)........................................................ Neobisium (N.) achaemenidum Nassirkhani & Mumladze, 2018 .