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Cave Biology Data Portal
Subterranean biodiversity of North America and around the globe
AnimaliaMolluscaGastropodaLittorinimorphaCochliopidaePhreatodrobia

Flattened Cavesnail
Phreatodrobia micra (Pilsbry & Ferriss, 1906)

Taxonomy

Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Order Littorinimorpha
Family Cochliopidae
Genus Phreatodrobia
Species Phreatodrobia micra (Pilsbry & Ferriss, 1906)

Synonyms

Valvata micra micra Pilsbry & Ferriss, 1906
Valvata micra Pilsbry & Ferriss, 1906

Description

Diagnostic characters

Ecological class
Stygobiont
Realm
Aquatic
Troglomorphy
Troglomorphic

Distribution

Type locality

Guadalupe R., near New Braunfels, Comal Co., TX

Range

Known from Texas in the Edwards Plateau and Balcones karst region.

Continent

North America

Country

United States

States and provinces

Texas

Counties

County-level records have not been compiled for this taxon. Distribution is recorded at state and karst-region level.

Karst regions

Edwards Plateau and Balcones

Genetics

Molecular resources

MarkerMoleculeSequences LengthExemplar
COI mitochondrial 8 434-657 bp OR372135.1
28S nuclear 2 540-664 bp PP860054.1

10 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.

Download all 10 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.

Specimens

Type material

Lectotype
MO91322 · Academy of Natural Sciences of Drexel University
Lectotype
MO465629 · Academy of Natural Sciences of Drexel University
Syntype
97994 · University of Michigan Museum of Zoology
Paratype
62.20173 · Carnegie Museum of Natural History

Collections holding material

InstitutionLots
Edwards Aquifer Research and Data Center, Texas State University 556
National Museum of Natural History, Smithsonian Institution 8
Field Museum of Natural History 4
Academy of Natural Sciences of Drexel University 2
Carnegie Museum of Natural History 1
Delaware Museum of Nature and Science 1
and 1 other collection 1

573 cataloged lots in 7 collections. Compiled from GBIF and not an exhaustive census: many collections are not yet digitised, and holdings are added continually. Search GBIF for specimen records.

Download all 573 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.

Conservation and management

NatureServe

G2G3 Imperiled to Vulnerable

G1G2▲G3▲G4G5

Global rank last reviewed 21 August 2002.

Subnational ranks

Texas
S2 Imperiled

State and federal status

Not listed under the U.S. Endangered Species Act

Other resources

Catalogue of Life
77CG9
GBIF
2299967
ITIS
70694
iNaturalist
227904
NCBI Taxonomy
2781063

How to cite this account

Phreatodrobia micra (Pilsbry & Ferriss, 1906). Cave Biology Data Portal, account SP-1383. https://cavebiology.org/species/phreatodrobia-micra/ (accessed 3 September 2026).

Data sources and funding are listed in the Acknowledgments.

Spotted something wrong on this page? Report a correction. Accounts are compiled from many sources and corrections from people who know the group are the most useful email we get.

Cave Biology Data Portal

Species accounts, distributions, and conservation status for the subterranean fauna of North America and around the globe, with resources for the cave and karst research community.

Text and data CC BY 4.0. Images all rights reserved unless stated.

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