This book presents the whole picture of the ecological and evolutionary
study on the ground beetle group, the subgenus Ohomopterus of the
genus Carabus, endemic to Japan. This flightless beetle group consists
of many geographic races. They show divergence in key traits for
reproductive isolation-body size and genital morphology, which leads to
coexistence of two or more species. This beetle group provides an
important material to study how a lineage of organisms diversify and
form multi-species assemblage, and thereby multiply their species
richness. The book introduces novel genomic approaches to resolve
questions about evolution of Ohomopterus. The readers will find that
this story of evolution in Carabus beetles revealed by recent
approaches is much different from what was told in previous literature.
Exploring different cases across a wide range of lineages is important
in constructing a synthetic theory of species radiation and richness,
including speciation and species coexistence. This study on
Ohomopterus beetles contributes to the ongoing discussion to
understand how and why species multiply and how species richness
increases in one area of our planet.