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 Praticolella trimatris Invertebrates Not Listed Not Listed G2 S2 True Woodland
No Accepted Common Name Prionus arenarius Invertebrates Not Listed Not Listed GNR SNR False Barren/Sparse Vegetation
No Accepted Common Name Prionus spinipennis Invertebrates Not Listed Not Listed GNR SNR False Barren/Sparse Vegetation
Brazoria crayfish Procambarus brazoriensis Invertebrates Not Listed Not Listed G1 S1 True The species is found in roadside ditches. In droughts, animals may burrow into substrate. The type locality is described as a ditch beside a road. The ditch was 100 m long and one metre wide which commonly contains water up to 0.3 m deep although does dry completely when there is no rain (Albaugh, 1975).
Neches crayfish Procambarus nechesae Invertebrates Not Listed Not Listed G2 S1S2 True Simple burrows in temporary or semi permanent pools in roadside ditches
blackbelted crayfish Procambarus nigrocinctus Invertebrates Not Listed Not Listed G1G2 S1 True It occurs in moderately flowing small creeks. Found among rocks and accumulated debris.
Nueces crayfish Procambarus nueces Invertebrates Not Listed Not Listed G1 S1 True Known only from one small sluggish stream tributary to the Nueces River; slightly sinuous channel with natural debris impeding flow; substrate of sand and gravel, also silt covered in deeper pooled areas; riparian edges of grasses, sedges, and herbaceous plants in mostly unshaded area
regal burrowing crayfish Procambarus regalis Invertebrates Not Listed Not Listed G2G3 SNR False It is a burrower usually found near or within stre stands of prairie lands, but in some places, burrows completely cover fields. Burrow areas may be far from places where rain would regularly produce pools of temporary water and tunnel depth may exceed 6 feet. Excavation around the hole is more often seen as a plume or low hill than a chimney (Johnson and Johnson, 2008).
Parkhill Prairie crayfish Procambarus steigmani Invertebrates Not Listed Not Listed G1G2 S1S2 True Burrower in long-grass prairie; all animals were collected with traps, thus there is no knowledge of depths of burrows; herbivore; crepuscular, nocturnal
Bastrop crayfish Procambarus texanus Invertebrates Not Listed Not Listed G1 S1 True Ponds
No Accepted Common Name Procloeon distinctum Invertebrates Not Listed Not Listed G1G3Q S2? True Mayflies distinguished by aquatic larval stage; adult stage generally found in shoreline vegetation
No Accepted Common Name Protandrena maurula Invertebrates Not Listed Not Listed GNR SNR False Grassland, Shrubland
San Marcos saddle-case caddisfly Protoptila arca Invertebrates Not Listed Not Listed G1 S1 True Known from an artesian well in Hays County; locally very abundant; swift, well-oxygenated warm water about 1-2 m deep; larvae and pupal cases abundant on rocks
Balmorhea saddle-case caddisfly Protoptila balmorhea Invertebrates Not Listed Not Listed G1 S1 False Oviparous; larvae make turtle-shaped cases of small pebbles attached to the underside of stones in swift-flowing streams and rivers
No Accepted Common Name Pseudocentroptiloides morihari Invertebrates Not Listed Not Listed G2G3 S2? True Mayflies distinguished by aquatic larval stage; adult stage generally found in shoreline vegetation
Chisos foxsnail Pseudosubulina cheatumi Invertebrates Not Listed Not Listed G1 S1 True Woodland
Diamond Y springsnail Pseudotryonia adamantina Invertebrates LE E G1 S1 True Endemic; aquatic snail only known from a spring system and associated outflows in Pecos County; mud substrates on the margins of small springs and seeps, and marshes in flowing water associated with sedges and cattails; presumed to be fine particle feeders of detritus and periphyton within substrate
No Accepted Common Name Psychopomporus felipi Invertebrates Not Listed Not Listed GNR S1 True Spring obligate. Known only from San Felipe Springs, Val Verde County. Fine scale habitat requirements unknown.
No Accepted Common Name Ptinus tumidus Invertebrates Not Listed Not Listed GNR SNR False Forest, Woodland
No Accepted Common Name Pygarctia lorula Invertebrates Not Listed Not Listed G2G3 S2? True Savanna/Open Woodland
Limpia Creek spring snail Pyrgulopsis davisi Invertebrates Not Listed T G1 S1 True Freshwater; in and on mud and rocks among patches of watercress in spring-fed rivulets
Caroline's Springs pyrg Pyrgulopsis ignota Invertebrates Not Listed T G1 S1 True Spring obligate. Known only from Caroline Springs in Terrell County. Fine scale habitat requirements unknown.
Presidio County spring snail Pyrgulopsis metcalfi Invertebrates Not Listed T G1 S1 False Found in the outflows of springs (24 degrees C) in fine mud and dense watercress
Phantom springsnail Pyrgulopsis texana Invertebrates LE E G1 S1 True Endemic aquatic snail; known only from three spring systems and associated outflows in Jeff Davis and Reeves counties; vulnerable to reduction of springflow resulting from declining levels of groundwater
No Accepted Common Name Rhadine austinica Invertebrates Not Listed Not Listed G1G2 S1S2 True Caves/Karst