..  Just to put a little Texas data into the mix
Leslie :)

TEXAS NERITIDAE (Nerites) – Record Sizes

Smaragdia viridis    Emerald Nerite
07.1 mm   12/29/00   J. Nill        Clark Isl. (Boca Chica), TX
Texas Range:  Aransas to Mexico Border

Nerita fulgurans     Antillean Nerite
34.7 mm   01/01/97   R. Neuffer     S. Padre Isl., TX
Texas Range:  Aransas to Mexico Border

Nerita versicolor    Four-Tooth Nerite
22.7 mm   07/01/96   D. Harris      S. Padre Isl., TX
Texas Range:  S. Padre to Mexico Border

Neritina virginea    Virgin Nerite
14.3 mm   01/01/88   L. Crnkovic    Laguna Madre-Corpus, TX
Texas Range:  Aransas to Mexico Border

Neritina reclivata    Olive Nerite
16.4 mm   04/01/94    R. Davenport  Carancahua Bay, TX
Texas Range:  Louisiana to Mexico Border

http://bcfas.org/museum/SSSBC/StudyProject/STUDYPROJECT.HTML

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