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Evolutionary Diversification of Banded Tube-Dwelling Anemones (Cnidaria; Ceriantharia; Isarachnanthus) in the Atlantic Ocean

Figure 4

Possible scenario to explain the recent distribution of Isarachnanthus species and the patterns of species differentiation.

Scenario 1– The hypothesis of peripatric and allopatric speciation through the intracontinental seaway. I – scenario around 16 myr before today; II – scenario around 11 myr before today; III – scenario around 8 myr before today; IV – scenario around 6 myr before today and V – currently scenario. A – The ancestral species of I. bandanensis + I. maderensis + I. nocturnus; B – Isarachnanthus maderensis; C – The ancestral species of I. bandanensis + I. nocturnus; D – Isarachnanthus nocturnus and E – Isarachnanthus bandanensis.

Figure 4