Allopatry
Guides
Gryllus vernalis
Northern Wood Cricket
Gryllus vernalis, the northern wood cricket, is a species of field cricket endemic to deciduous woodlands of the midwestern United States. It is distinguished by its predominantly black exoskeleton, occasionally marked with red patches on the femora, and a notably wide pronotum. The species inhabits leaf litter and shows evidence of reproductive isolation mechanisms, particularly strong female discrimination against heterospecific mates in sympatric populations.
Leptotes
Zebra Blues
Leptotes is a genus of small butterflies in the family Lycaenidae, commonly known as zebra blues due to their distinctive zebra-striped undersides. The genus contains multiple species distributed across tropical and subtropical regions including the Americas, Africa, Europe, the Middle East, southern and eastern Asia, and eastern Australia. Several endemic species occur on oceanic islands including the Galapagos, Canary Islands, Mauritius, Príncipe, and São Tomé. Leptotes species are myrmecophilous, meaning they have associations with ants, though research suggests ant partners play a minor role in their occurrence on host plants.
Polyzosteriinae
Polyzosteriinae is a subfamily of cockroaches within the family Blattidae. The subfamily includes species with documented allopatric population structures, such as the Tasmanian endemic Polyzosteria yingina, which exhibits strongly separated alpine and coastal populations. Mating behavior has been studied in at least one species, Eurycotis floridana, revealing courtship rituals and copulatory sequences. The subfamily is taxonomically established within Blattodea but detailed biological information remains limited to individual species studies.
Trachusa
Trachusa is a genus of resin bees in the family Megachilidae, tribe Anthidiini, comprising at least 50 described species distributed across the Palearctic region. Recent taxonomic revisions have revealed extensive cryptic diversity, with several species complexes (e.g., T. interrupta and T. pubescens groups) resolved from formerly recognized single widespread species into multiple distinct, often allopatric or narrowly sympatric species. These bees are characterized by resin-collecting behavior and are classified as leafcutter, mason, and resin bees, though specific nesting biology is documented for few species.