11. Legends
Fig. 1. Haplotype network of COI mitochondrial gene. Areas of
the circles are proportional to the number of individuals. Each circle
represents a haplotype, dots between haplotypes symbolize mutational
steps.
Fig. 2. Phylogenetic trees obtained with Maximum Likelihood and
Bayesian Inference approaches. Left, phylogeny constructed with the
mitochondrial marker COI. Right, phylogeny constructed with the nuclear
marker 18S. Only nodes supported by bootstrap value ≥ 51 and posterior
probability ≥ 0,86 are reported. Mirrored pattern of branching clades is
observed, dotted lines indicate the only two samples that do not show
this congruent pattern. In red group A, in blue group B defined by ABGD
species delimitation analysis and the haplotype network of COI.
Fig. 3. Species distribution along the Antarctic Peninsula.
Each circle represents a sampling station, in red the proportion ofC. verrucosa sp. A , in blue the proportion of C.
verrucosa sp. B , in grey no A/no B (basal branch). Numbers
represent sample size.
Fig. 4. Photos. a) specimen with basal disc, b) specimen
without basal disc. To the right (c and d) underwater photos taken by
Cristian Lagger, in the benthos assemblage of Potter Cove where high
diversity of morphological features is observed in C. verrucosa
sensu lato.