DNA barcoding data for springsnails

In desert environments, unique communities depend on groundwater at
springs. There is a diverse radiation of small (<5 mm) snails found
across the desert southwest in North America. Nearly all springsnail
species are considered critically imperiled with their existence depending
on maintenance of spring-flows in regions of declining water availability.
Extant, endemic, springsnails in the Trans-Pecos region of Texas include
one species of Pseudotryonia Hershler, 2001, five nominal Tryonia W.
Stimpson, 1865 (Cochliopidae) and seven Pyrgulopsis Call &
Pilsbry, 1886 (Hydrobiidae). Four of these snails are classified as
endangered under the US Endangered Species Act. Survey work was conducted
at the type and previously reported localities of named springsnails and
116 previously unsampled spring sites to locate and identify additional
populations. Sequences of the DNA barcoding region were used to establish
a database of known sequences from the named species and confirm
identifications of new populations encountered.