Dr. Cannings also offers a biogeographic hypothesis of the history of Lasiopogon, suggesting that the genus may have originated in Laurasia as early as the late Jurassic period.

Noted entomologist Dr Robert Cannings introduces students, naturalists and outdoor enthusiasts to the world of dragonflies. In this compact book, he shows readers where to find dragonflies and how to watch and study them in the field.

"Abstract: Nearctic species of Lasiopogon Loew comprising the bivittatus section (the bivittatus group sensu Cannings 2002) are revised, with the description of 13 new species, elevation of one subspecies to species, and redescriptions of ...