The figure below shows many of the species involved in adaptation of higher high stalks, notably the evolutionary lines both starting with Asaphus expansus, with one leading to Asaphus cornutus and Asaphus Kowalewskii, and the other leading successively to Asaphus Kotlukovi, Asaphus punctatus, and Asaphus intermedius. Click hot spots to see individual species. Return to Trilobite Fossil Site Page for Saint Petersburg Region, Russia Also see: Russian Trilobites Gallery |