▪ Abstract Many uses of gene trees implicitly assume that nominal species are monophyletic
in their alleles at the study locus. However, in well-sampled gene trees, certain alleles in one …

Regional phylogeographical studies involving co‐distributed animal and plant species have
been conducted for several areas, most notably for Europe and the Pacific Northwest of …

Phylogeography is a discipline concerned with various relationships between gene
genealogies—phylogenetics—and geography. The word “phylogeography” was coined in …

The existence of a continuous array of sympatric biotypes—from polymorphisms, through
ecological or host races with increasing reproductive isolation, to good species—can …

▪ Abstract Sympatric speciation is the splitting of one evolutionary lineage into two without
the occurrence of geographic isolation. The concept has been intimately tied to entomology …

▪ Abstract Insect molecular systematics has undergone remarkable recent growth. Advances
in methods of data generation and analysis have led to the accumulation of large amounts of …

The notion that shifts to new hosts can initiate insect speciation is more than 150 years old,
yet widespread conflation with paradigms of sympatric speciation has led to confusion about …

To investigate the utility of a region of wingless (wg) as a marker for molecular systematics,
we compared wg sequences to mitochondrial COII sequences from twenty‐two nymphalid …

There is growing awareness of the importance of natural selection in driving genetic
divergence and speciation, and several of the most apparent cases of this ecological …

Developmental time is a trait of great relevance to fitness in all organisms. In
holometabolous species that occupy ephemeral habitat, like Drosophila melanogaster, the …