WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

Molluscabase - taxdetails www.molluscabase.org

Molluscabase - taxdetails www.molluscabase.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

WoRMS - World Register of... www.marinespecies.org

William Healey Dall |... www.conchology.be

Galápagos Province, Ecuador... www.mindat.org

Nazca Plate www.mindat.org

Catalogue of the Living... www.yumpu.com

Proceedings of the United... archive.org

Texas conchologist archive.org

Proceedings of the United... archive.org