Kate F. Darling

TL;DR: This work identifies at least one identical genotype in all three morphospecies in both the Arctic and Antarctic subpolar provinces, indicating that trans-tropical gene flow must have occurred, and reveals that foraminiferal morphos pecies can consist of a complex of genetic types.

TL;DR: The genetic evidence demonstrates that coiling direction in N. pachyderma is a genetic trait, heritable through time, and is not a morphological feature reflecting ecophenotypic variation, meaning that the two opposite coiling morphotypes appear to have diverged during the late Miocene and should be considered different species.

TL;DR: A comprehensive picture of the mechanisms potentially at play in the high latitudes by combining molecular, biogeographic, fossil, and paleoceanographic data to reconstruct the evolutionary history of the polar planktonic foraminifer Neogloboquadrina pachyderma sinistral is derived.

TL;DR: The data suggest that G. bulloides type IId and possibly even the new genotypes listed above may be associated specifically with the complex hydrography or other environmental features characteristic of this area, especially in areas of paleoceanographic interest, where geochemical and paleontological proxies are being calibrated.

TL;DR: Observations and results from DNA sequencing unequivocally demonstrate that G. siphonifera Types I and II are living examples of cryptic speciation, whereby biological speciation has occurred in the absence of discernable change in shell morphology.