Species of Greatest Conservation Need

**Species of Greatest Conservation Need** (Updated: 06/16/2025)
Scientifc Name	Common Name	Taxonomic Group	SGCN Status	Federal Status	State Status	Global Rank	State Rank	Endemic	General Habitat Type(s)
Cisthene conjuncta	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1Q	S1	Not Evaluated	Habitat description is not available at this time.
Comaldessus stygius	Comal Springs diving beetle	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Yes	Known only from the outflows at Comal Springs; aquatic; diving beetles generally inhabit the water column
Cordulegaster sarracenia	sarracenia spiketail	Invertebrates	Yes	Not Listed	Not Listed	G3	SNR	Not Evaluated	Habitat description is not available at this time.
Cryptocephalus downiei	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1	SH	Not Evaluated	Habitat description is not available at this time.
Cyclonaias necki	Guadalupe orb	Invertebrates	Yes	E 07/05/2024	E 07/05/2024	G1	S2	Yes	Species' distribution is limited to the Guadalupe River basin. Occurs in both mainstem and tributary habitats. Often found in substrates composed of sand, gravel, and cobble, including mud-silt or gravel-filled cracks in bedrock slabs. Considered intolerant of reservoirs, but are known to occur in them (Howells 2010m; Randklev et al. 2017b). [Mussels of Texas 2020]
Cyclonaias nodulata	wartyback	Invertebrates	Yes	Not Listed	Not Listed	G4	S2	No	Reported from small to medium-sized rivers, often in the lower reaches of these systems, and occasionally in lakes and reservoirs. Often found in habitats with substrates composed of sand and gravel in moving water (Parmalee and Bogan 1998). Occurs in main-channel habitats such as riffles and runs and in nearshore habitats including banks and backwaters (Haag and Cicerello 2016).
Cyclonaias petrina	Texas pimpleback	Invertebrates	Yes	E 07/05/2024	E 07/05/2024	G1	S1	Yes	Occurs in medium-size streams to large rivers primarily in riffles and runs. Often found in substrates composed of sand, gravel, and cobble, including mud-silt or gravel-filled cracks in bedrock slabs. Considered intolerant of reservoirs (Howells 2010m; Randklev et al. 2017b). [Mussels of Texas 2019]
Cyclonaias pustulosa	pimpleback	Invertebrates	Yes	Not Listed	Not Listed	G5	SNR	No	Occurs in small streams to large rivers in habitats including riffles and runs with flowing water, also found in nearshore habitats such as banks and backwaters or pools. Can occur in reservoirs but varies based by population. Is often found in substrates comprising of sand, gravel, and cobble but also mud and silt (Howells et al. 1996; Williams et al. 2008; Watters et al. 2009).
Cyrtonaias tampicoensis	Tampico pearlymussel	Invertebrates	Yes	Not Listed	Not Listed	G5	S4	No	Reported from streams to rivers, reservoirs, and canals. In riverine habitats often found in nearshore habitats such as banks and backwaters, to include pools and oxbows, in mud or sand or among cobble and boulders with still to moderate currents (Howells et al. 1996).
Daedalochila hippocrepis	horseshoe liptooth	Invertebrates	Yes	Not Listed	Not Listed	G1	S2	Not Evaluated	Terrestrial snail known only from the steep, wooded hillsides of Landa Park in New Braunfels
Danaus plexippus plexippus	migratory monarch butterfly	Invertebrates	Yes	C 12/17/2020	Not Listed	G4T3	SNR	Not Evaluated	Habitat description is not available at this time.
Dendrocephalus acacioidea	acacia fairy shrimp	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Yes	Playa, roadside pools in Brooks, Hidalgo, Kleberg Cos., Texas (Jass and Klausmeier, 2000). Occurs in turbid, warm water temporary pools and playas.
Dinocheirus cavicola	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G2G3	S2	Yes	Habitat description is not available at this time.
Diplocentrus diablo	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S2	No	Like all species of Diplocentrus, D. diablo is an obligate burrower but may be found under large surface objects in rocky areas of the Rio Grande Valley (Stockwell & Nilsson 1987).
Eidmannella bullata	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1	Yes	Habitat description is not available at this time.
Eidmannella delicata	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1	Yes	Habitat description is not available at this time.
Eidmannella nasuta	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1	Yes	Habitat description is not available at this time.
Eidmannella reclusa	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S2	Yes	Habitat description is not available at this time.
Ereboporus naturaconservatus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S1	Yes	Habitat description is not available at this time.
Erynnis martialis	mottled duskywing	Invertebrates	Yes	Not Listed	Not Listed	G3	S1	Not Evaluated	Habitat description is not available at this time.
Euchemotrema leai cheatumi	palmetto pill snail	Invertebrates	Yes	Not Listed	Not Listed	G5T1	S1	Not Evaluated	Habitat description is not available at this time.
Euglandina texasiana	glossy wolfsnail	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S3	Not Evaluated	Habitat description is not available at this time.
Euphyes bayensis	bay skipper	Invertebrates	Yes	Not Listed	Not Listed	G2G3	S1	No	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
Euproserpinus wiesti	Wiest's sphinx moth	Invertebrates	Yes	Not Listed	Not Listed	G3	S1	Not Evaluated	Habitat description is not available at this time.
Fallicambarus devastator	Texas prairie crayfish	Invertebrates	Yes	Not Listed	Not Listed	G3	S2?	Yes	Habitat description is not available at this time.