Fig. 6. A. A in A second species of Stenasellus Dollfus, 1897 (Isopoda, Stenasellidae) from sulfidic groundwater of Iran described using morphological and molecular methods

Fig. 6. A. A four-gene (COI, 16S, 28S and FASTKD4) dated phylogeny of Stenasellidae Dudich, 1924 extracted from the World Aselloidea Phylogeny of Saclier et al. (2024). Terminal nodes are molecular operational taxonomic units (MOTUs) as delimited with the fixed COI threshold method implemented by Lefébure et al. (2006). MOTU numbers are given in parenthesis. Names of genera as follows: B: Balkanostenasellus Cvetkov, 1975; M: Magniezia Lanza, 1966; P: Protelsonia Méhely, 1924; S: Stenasellus Dollfus, 1897. All branches leading to Asellidae Latreille, 1802 (i.e., 384 MOTUs) were collapsed. Blue dots show two of the 17 paleobiogeographic calibration points used to obtain a dated phylogeny of Aselloidea Latreille, 1802. Point 16: divergence time between Stenasellidae and Asellidae (139 Ma; 95% credibility interval: 174–106 Ma); point 17: divergence time between Sardinian species of the S. racovitzai species complex (MOTUs 23 and 46) and their continental relatives in France (25 Ma; 95% credibility interval: 31–19 Ma) (15 other calibration points within Asellidae are not shown). pp are posterior probabilities. B. Map showing the distribution of MOTU occurrence. MOTU numbers as in panel A.