Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 181, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2023.107710
Keywords
Biogeography; Phylogenetics; Reproductive isolation; Speciation; Genitalia; Selection
Ask authors/readers for more resources
Molecular studies have found that many species in the Indo-West Pacific have allopatric mosaics of endemic lineages, indicating the need for substantial time for isolating mechanisms to evolve. A phylogeny of Chlorodiellinae crabs showed allopatric lineages without divergent male genitalia, suggesting that divergence occurs after isolation in allopatry. However, genital morphological evolution plays an important role in completing speciation in these crabs.
Molecular studies have revealed that many species once thought to be wide-ranging in the Indo-West Pacific contain allopatric mosaics of endemic lineages. These lineages provide compelling evidence that substantial time is needed to evolve isolating mechanisms sufficient to permit successful secondary sympatry, and that divergence is initiated in allopatry. In this context, questions arise regarding the nature, timing, and origin of isolating mechanisms that permit secondary sympatry. We present a phylogeny of the crab subfamily Chlorodiellinae which displays allopatric mosaics within species. These allopatric lineages typically do not have divergent male genitalia, while older sympatric lineages do. We tested the relationship between genetic distance (proxy for time), sympatry, and the divergence of male genitalic morphology. Our results suggest that male genitalic divergence is not involved in the initiation of speciation in chlorodielline crabs, having likely occurred only after isolation began in allopatry. However, morphological evolution of genitalia seemingly does play an important role in completing the process of speciation in these crabs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available