Cladogenetic patterns in the entire subfamily are better explained by an allopatric model of speciation.
Carlos Pedraza-Lara, Ignacio Doadrio, Jesse W. Breinholt, Keith A. Crandall 2012, 'Phylogeny and Evolutionary Patterns in the Dwarf Crayfish Subfamily (Decapoda: Cambarellinae)',PLoS ONE10.1371/journal.pone.0048233. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)