Although Spies et al.’s (2002) thorough analysis of a small sample the then available specimens Chironomus calligraphus Goeldi,1905 suggested two distinctly different haplotypes in mitochondrial COII gene, corresponding morphological and cytological evidence kept authors from concluding that there were species involved. Further obstacles unusual aspects molecular data occurrence both these samp...

The genus Coris contains 28 valid species, most of them with an Indo-Pacific distribution and only two species recognized from the eastern Atlantic: atlantica C. julis . This last has a large variability in its coloration, which caused that during first half XIX century sexes were considered as different species. Two liveries have been described for : (i) primary or “ giofredi ,” corresponds to...

Studies of related populations varying in their degrees of reproductive isolation can provide insights into speciation. Here, the transition from partially isolated host races to more fully separated sibling species is investigated by comparing patterns of genetic differentiation between recently evolved (∼150 generations) apple and ancestral hawthorn-infesting populations of Rhagoletis pomonel...

It has been proposed that the common West Coast limpet, Lottia digitalis, is actually the northern counterpart of a cryptic species duo including, Lottia austrodigitalis. Allele frequency diVerences between southern and northern populations at two polymorphic enzyme loci provided the basis for this claim. Due to lack of further evidence, L. austrodigitalis is still largely unrecognized in the l...

Crested penguins (genus Eudyptes) have a peculiar hatching pattern, with the first-laid egg (A-egg) hatching after the second-laid egg (B-egg) and chicks from A-eggs typically having a much lower survival probability. Maternal yolk androgens have been suggested to contribute to the competitive superiority of the B-chick in southern rockhopper penguins Eudyptes chrysocome, given their important ...