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Fig. 4 | BMC Evolutionary Biology

Fig. 4

From: Phylogeography and genetics of the globally invasive snail Physa acuta Draparnaud 1805, and its potential to serve as an intermediate host to larval digenetic trematodes

Fig. 4

Invasion timeline of Physa acuta. 1. Absence of Physa acuta shells from European fossil deposits older than 18th Century [115]. 2. Described by Draparnaud [7] near Bordeaux, France. Anderson [87] posits likelihood of introduction from Mississippi USA via the cotton trade. 3. Trade between USA and France ends during Napoleonic wars, trade with England and USA begins. 4. First reports of P. acuta in England [88, 89]. 5. Reports of P. acuta all over United Kingdom by the later half of 20th Century [116,117,118,119] 6–12. Primary citations for these reports are listed in Additional File 7

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