Caucaseuma Strasser, 1970

Antić, Dragan & Makarov, Slobodan, 2022, Review of the genus Caucaseuma Strasser, 1970, with the description of a new cavernicolous species from the Western Caucasus and an updated key and distribution (Diplopoda, Chordeumatida, Anthroleucosomatidae), European Journal of Taxonomy 819 (1), pp. 90-107 : 102

Key to the species of the genus Caucaseuma Strasser, 1970

(based on the anterior gonopods of males)

1. Anterior part of angiocoxites with a pair of distal notches ............................................................... 2

– Anterior part of angiocoxites without a pair of distal notches .......................................................... 5

2. Anterior parts of angiocoxites with a pair of anterior triangular processes ( Fig. 7H ) ........................ .................................................................................................................... C. strasseri Antić sp. nov.

– Without such processes ..................................................................................................................... 3

3. Medial projection of anterior part of angiocoxites fused distally ( Fig. 7C ) ....................................... ..................................................................................................... C. minellii Antić & Makarov, 2016

– Medial projection of anterior part of angiocoxites not fused distally ............................................... 4

4. Lateral projections of angiocoxites distally rounded; smaller species, 11 mm ( Fig. 7E ) ................... .................................................................................................... C. kelasuri Antić & Makarov, 2016

– Lateral projections of angiocoxites distally in the form of elongated processes strongly curved posteriad; larger species, 16–17 mm ( Fig. 7F ) .................................... C. lohmanderi Strasser, 1970

5. Anterior part of angiocoxites with two distinctive, bifurcated, posterior projections/processes (see Antić & Makarov 2016: 31, fig. 20b, c, bp1 and bp2; Fig. 7A ) ......................................................... .............................................................................................. C. elephantum Antić & Makarov, 2016

– Without such posterior projections/processes ................................................................................... 6

6. Anterior parts of angiocoxites with a deep V-shaped incision distally ( Fig. 7B ) ................................ ........................................................................................ C. fanagoriyskaya Antić & Makarov, 2016

– Anterior parts of angiocoxites without a deep V-shaped incision distally ........................................ 7

7. Margins of the anterior parts of angiocoxites circular ( Fig. 7D ) ........................................................ ........................................................................................... C. glabroscutum Antić & Makarov, 2016

– Margins of the anterior parts of angiocoxites subquadrangular ( Fig. 7G ) .......................................... ................................................................................................... C. variabile Antić & Makarov, 2016

To easily distinguish all eight species of the genus Caucaseuma , see also Figure 7 .

Figures

Fig. 7. Anterior gonopods in the genus Caucaseuma Strasser, 1970, anterior views. A. C. elephantum Antić & Makarov, 2016. B. C. fanagoriyskaya Antić & Makarov, 2016. C. C. minellii Antić & Makarov, 2016. D. C. glabroscutum Antić & Makarov, 2016. E. C. kelasuri Antić & Makarov, 2016. F. C. lohmanderi Strasser, 1970. G. C. variabile Antić & Makarov, 2016. H. C. strasseri Antić sp. nov., paratype, ♂ (IZB). A–E, G after Antić & Makarov (2016), F after Strasser (1970). Scale bar = 0.3 mm for all, except for F (not to scale).