FIG. 2 in Phylogenetic relationships and description of a new stygobite species of Bythinella (Mollusca, Gastropoda, Caenogastropoda, Amnicolidae) from southern France

FIG. 2. — Bayesian phylogenetic tree of Bythinella specimens based on 111 COI sequences: A, detail of the COI global Bayesian tree implying the clade A (B. navacellensis n. sp. and B. eurystoma (Paladilhe, 1870)) and clade B (B. cebennensis (Dupuy, 1849) and B. navacellensis n. sp.) (shell outlines represented). Name and code of each locality are indicated in Table 1 for B. eurystoma and B. navacellensis n. sp. Thick bars, exclusively hypogean species. Values of branch robustness are indicated for each node; model parameters for BI analyses: I = 0.228; Γ4 = 0.124; [AC] = 0.035; [AG] = 0.459; [AT] = 0.050; [CG] = 0.048; [CT] = 0.291; [GT] = 0.026; A = 0.327; C = 0.221; G = 0.115; T = 0.327; B, detail of the ITS1 global Bayesian tree modified from Bichain et al. (2007a). The individuals of B. navacellensis n. sp. for which we obtained both COI and ITS1 sequences are indicated in bold. Values of branch robustness are indicated for each node.