Two new phreatic snails (Mollusca: Caenogastropoda: Cochliopidae) from the Edwards and Edwards-Trinity aquifers, Texas

# Title of Dataset: *** New phreatic snails (Mollusca: Caenogastropoda: Cochliopidae) from the Edwards-Trinity aquifer system, Texas. We developed a dataset of COI and nuclear LSU to distinguish species of phreatic snails of Texas and understand their relationship. ## Description of the Data and file structure These files include 2 DNA sequence alignments of the COI DNA barcoding region and one of the nuclear large subunit. They are in Phylip relaxed format. The first two numbers are the number of sequences, then the number of characters, followed by all the sequences in a row, headed by an identifer. The identifier is either the GenBank number or a laboratory identifier that can be matched with the GenBank data. The data is positioned so that the reading frame starts with codon #1. All available sequences from GenBank appearing in previous literature were included with new sequences generated during this study. GenBank sequences must be used with caution as misidentifications and outdated metadata are typical. For that reason, the GenBank sequences that were included are only those from the taxonomic literature that described these species, or from topotypic individuals. For type localities where we were not able to sample and sequence from fresh materials, these were used to confirm species identity. Sequences were aligned in Geneious R10 using the MUSCLE alignment algorithm (Edgar 2004). Phylogenetic analyses were conducted in IQTree 1.6.12 (Minh et al. 2013, Nguyen et al. 2015, Hoang et al. 2018). Missing data is identified by a hyphen. ## Sharing/access Information Links to other publicly accessible locations of the data: Was data derived from another source? If yes, list source(s):GenBank