Species of Greatest Conservation Need

1279 species
Taxonomic Group
Federal Status
State Status
Endemic

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Species of Greatest Conservation Need (Updated: 01/31/2024)
Common Name Scientifc Name Taxonomic Group Federal Status State Status Global Rank State Rank Endemic General Habitat Type(s)
No Accepted Common Name Eidmannella bullata Invertebrates Not Listed Not Listed G1G2 S1 True Caves/Karst
No Accepted Common Name Eidmannella delicata Invertebrates Not Listed Not Listed G1G2 S1 True Caves/Karst
No Accepted Common Name Eidmannella nasuta Invertebrates Not Listed Not Listed G1G2 S1 True Caves/Karst
No Accepted Common Name Eidmannella reclusa Invertebrates Not Listed Not Listed G1G2 S1 True Caves/Karst
No Accepted Common Name Eidmannella tuckeri Invertebrates Not Listed Not Listed GNR SNR False Caves/Karst
No Accepted Common Name Elimia comalensis Invertebrates Not Listed Not Listed G2 S2? True Aquifer, Freshwater Wetland
No Accepted Common Name Epitragosoma arenaria Invertebrates Not Listed Not Listed GNR SNR False Barren/Sparse Vegetation
No Accepted Common Name Ereboporus naturaconservatus Invertebrates Not Listed Not Listed GNR S1 True Aquifer, Freshwater Wetland
No Accepted Common Name Eucera birkmanniella Invertebrates Not Listed Not Listed GNR SNR False Grassland, Shrubland
Glossy Wolfsnail Euglandina texasiana Invertebrates Not Listed Not Listed G1G2 S1S2 False Woodland
No Accepted Common Name Euphoria casselberryi Invertebrates Not Listed Not Listed GNR SNR False Grassland, Savanna/Open Woodland
bay skipper Euphyes bayensis Invertebrates Not Listed Not Listed G2G3 S1 False Apparently tidal sawgrass marsh only, probably covers same range of salinity as saw grass, nectarivore (butterfly), herbivore (caterpillar), larval foodplant is so far unconfirmed but is probably sawgrass, diurnal; two well separated broods apparently peaking in late May and in September which suggests the larvae may well aestivate in summer and the next brood hibernate
No Accepted Common Name Eupseudomorpha brillians Invertebrates Not Listed Not Listed GNR SNR False Forest, Savanna/Open Woodland
Houston burrowing crayfish Fallicambarus houstonensis Invertebrates Not Listed Not Listed G2 S3 False All species in the genus <i>Fallicambarus </i>are primary burrowers (Guiasu, 2007). It is clearly a primary burrower with 100% of adult and subadult specimens known from excavated burrows. Large numbers of juveniles were collected from Temporary pools (October through February) (Johnson, 2008).
Big Thicket burrowing crayfish Fallicambarus kountzeae Invertebrates Not Listed Not Listed G2 S3 False All species in the genus Fallicambarus are primary burrowers (Guiasu, 2007). It is a primary burrower with 100% of known adults and subadults collected from burrows. Small juveniles are common in open water during the cool season (Johnson, 2008).
No Accepted Common Name Farrodes mexicanus Invertebrates Not Listed Not Listed G1G2 SNR False In Big Bend National Park, larvae were found in small, permanently flowing, spring-fed creeks clinging to the underside of small stones and rocks in regions of the stream with little flow (Baumgardner and Bowles, 2005).
No Accepted Common Name Faxonella blairi Invertebrates Not Listed Not Listed G4G5 SNR False Temporary pools and roadside ditches in woodland habitats. In wet seasons they emerge from chimneyless burrows of 0.7 to 1.2 feet deep to live in shallow sloughs, swamps, ditches and overflow pools (Johnson and Johnson, 2008).
Texas pigtoe Fusconaia askewi Invertebrates Not Listed T G2? S2S3 False Occurs in small streams to large rivers, usually in water with at least some current; not known from reservoirs. Found in a variety of habitats but most common in riffles. Inhabits various substrates though most often sand, gravel, and cobble (Howells 2010a; Randklev et al. 2013b; Randklev et al. 2014a; Troia et al 2015).[Mussel of Texas 2019]
Trinity pigtoe Fusconaia chunii Invertebrates Not Listed T GNR S1 True Found in a variety of habitats but most common in riffles. Inhabits various substrates though most often sand, gravel, and cobble (species was recently split from Texas Pigtoe and occurs in similar habitats; Howells 2010a; Randklev et al. 2013b; Randklev et al. 2014a; Troia et al 2015). [Mussels of Texas 2020]
false spike Fusconaia mitchelli Invertebrates PE T GNR S1 False Occurs in small streams to medium-size rivers in habitats such as riffles and runs with flowing water. Is often found in stable substrates of sand, gravel, and cobble (Howells 2010; Randklev et al. 2012; Sowards et al. 2013; Tsakiris and Randklev 2016). [Mussels of Texas 2019]
diminutive amphipod Gammarus hyalelloides Invertebrates LE E G1 S1 True Known only from Phantom Lake Spring; omnivorous; amphipods are active mostly at night and spend daylight hours hiding under vegetation and other cover; vulnerable to reduction of springflow resulting from declining levels of groundwater
Pecos amphipod Gammarus pecos Invertebrates LE E G1 S1 True Omnivorous; amphipods are active mostly at night and spend daylight hours hiding under vegetation and other cover; vulnerable to reduction of springflow resulting from declining levels of groundwater
Tamaulipan clubtail dragonfly Gomphus gonzalezi Invertebrates Not Listed Not Listed G2 S2 False Rivers, muddy to clear and rocky, should be watched for in substantial creeks as well. This species is considered rare and has a very restricted range in the Rio Grande Valley and southward in eastern Mexico. Abundance information is lacking (Ware et al 2016; Abbott 2005).
Edwards Aquifer diving beetle Haideoporus texanus Invertebrates Not Listed Not Listed G1G2 S1 True Habitat poorly known; known from an artesian well in Hays County
No Accepted Common Name Hapalips texanus Invertebrates Not Listed Not Listed GNR SNR False Forest, Woodland