Research by Dr. Kathryn E. Perez found that while it was previously believed that there was a single invasive Praticolella species involved (i.e. Praticolella griseola), "....there are actually three species of Praticolella invasive in the U. S., two of which were previously unknown." The specimens illustrated here have been determined to be Praticolella mexicana, which was recently described.* Invasive Praticolella have thus far been found in Florida, Alabama, Mississippi, Louisiana, and Texas. To date (9/23/2012), live specimens have only been found at ten locations in northeast Florida (eight in Duval County and two in Clay County). Of the ten locations six have been in close proximity to an active railroad line.

*Perez, K., 2011. A new species of Praticolella (Gastropoda: Polygyridae) from northeastern Mexico and revision of several species of this genus. The Nautilus 125(3): 113-126. 1 Sept. Original Description (1.41 mb PDF File)