Incomplete lineage sorting and ancient admixture, and speciation without morphological change in ghost-worm cryptic species.

ABSTRACT: Morphologically similar species, that is cryptic species, may be similar or quasi-similar owing to the deceleration of morphological evolution and stasis. While the factors underlying the deceleration of morphological evolution or stasis in cryptic species remain unknown, decades of research in the field of paleontology on punctuated equilibrium have originated clear hypotheses. Species are expected to remain morphologically identical in scenarios of shared genetic variation, such as hybridization and incomplete lineage sorting, or in scenarios where bottlenecks reduce genetic variation and constrain the evolution of morphology. Here, focusing on three morphologically similar Stygocapitella species, we employ a whole-genome amplification method (WGA) coupled with double-digestion re

SUBMITTER: Cerca J 

PROVIDER: S-EPMC7879940 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature