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)
Humboldtiana palmeri	Mount Livermore threeband	Invertebrates	Yes	Not Listed	Not Listed	G2	S2	Not Evaluated	Terrestrial snail; highest parts (most mesic) of igneous intrusive mountains; in leaf litter; among boulders
Humboldtiana texana	Stockton Plateau threeband	Invertebrates	Yes	Not Listed	Not Listed	G2	S2	Yes	Rocky hill country with short grasses and some dwarf oaks on the hills; elevation about 1200-1500 m (3900-5000 ft)
Humboldtiana ultima	northern threeband	Invertebrates	Yes	Not Listed	Not Listed	G2	S3	Not Evaluated	Leaf litter in mesic canyons of limestone mountains; in soil, under rocks
Hyalella texana	Clear Creek amphipod	Invertebrates	Yes	Not Listed	T 03/30/2020	G1	S1	Not Evaluated	Hyallela spp. cling to vegetation and burrow in sediments of permanent freshwater impoundments; deposit-feeders, limited to uppermost layer of the sediment; lay eggs in marsupium of females where sperm has been deposited
Hydroptila melia	purse casemaker caddisfly	Invertebrates	Yes	Not Listed	Not Listed	G2G3	S2?	Not Evaluated	Habitat description is not available at this time.
Hydroptila ouachita	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1	Not Evaluated	Lotic systems, but specifics unknown
Islandiana unicornis	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G2G3	S3	Not Evaluated	Habitat description is not available at this time.
Isoperla jewetti	grande stripetail	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Not Evaluated	Originally described from El Paso Co., Texas from specimens collected in 1939.
Isoperla sagittata	arrowhead stripetail	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Yes	This species is known from a single site in southeast Texas (Newton Co.) (Stark et al. 2012; Stark 1996).
Lampsilis bergmanni	Guadalupe fatmucket	Invertebrates	Yes	E 07/05/2024	T 03/27/2020	G1	SNR	Yes	Reported to occur in slow to moderate current in sand, mud, and gravel substrates among large cobble, boulders, bedrock ledges, horizontal cracks in bedrock slabs, and macrophyte beds. Has also been observed inhabiting the roots of cypress trees and vegetation along steep banks. Reported in lakes at Kerrville, Texas, which suggests it may occasionally persist in some impoundment conditions (Robert G. Howells, personal communication). (Mussels of Texas, 2020)
Lampsilis bracteata	Texas fatmucket	Invertebrates	Yes	E 07/05/2024	T 01/17/2010	G1	S1	Yes	Reported to occur in slow to moderate current in sand, mud, and gravel substrates among large cobble, boulders, bedrock ledges, horizontal cracks in bedrock slabs, and macrophyte beds. Has also been observed inhabiting the roots of cypress trees and vegetation along steep banks. Past authorities have reported this species intolerant of reservoir conditions but recent surveys suggest it may persist in some impoundment conditions (Howells 2010c; Randklev et al. 2017b). [Mussel of Texas 2019]
Lampsilis hydiana	Louisiana fatmucket	Invertebrates	Yes	Not Listed	Not Listed	G4	S4	No	Reported from streams to rivers, may penetrate into headwaters, oxbows, lakes, canals, and reservoirs. Reported to occur in still to moderate currents in sand, mud, and gravel substrates. In riverine systems it is found primarily in nearshore habitats such as banks, backwaters and oxbows (Howells et al. 1996; Randklev et al. 2013a; Randklev et al. 2014a; Tsakiris and Randklev 2016). It adapts readily to reservoirs and can cope with flow modification stemming from river impoundment (Randklev et al. 2016).
Lampsilis satura	sandbank pocketbook	Invertebrates	Yes	Not Listed	T 01/17/2010	G2?	S1	No	Occurs in small streams to large rivers in slow to moderate current in sandy mud to sand and gravel substrate. Can occur in a variety of habitats but most common in littoral habitats such as banks or backwaters or in protected areas along point bars (Randklev et al. 2013b; Randklev et al. 2014a; Troia et al. 2015). [Mussels of Texas 2019]
Latineosus cibola	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	SNR	Not Evaluated	This species was recently described from Texas in only two localities (a creek and a water treatment plant on a major river) in Val Verde and Webb Cos. (Sun and McCafferty, 2008).
Leaunio lienosus	little spectaclecase	Invertebrates	Yes	Not Listed	Not Listed	G5	S1S2	No	Reported from streams to rivers in still to moderate currents in mud, sand, or gravel substrates. Usually found in nearshore habitats such as bank and backwater habitats or depositional areas but may occur in mainchannel habitats such as riffles.
Leptobasis melinogaster	cream-tipped swampdamsel	Invertebrates	Yes	Not Listed	Not Listed	GNR	SNR	Not Evaluated	Habitat description is not available at this time.
Leucohya texana	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1	Yes	Habitat description is not available at this time.
Limnephilus adapus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Not Evaluated	Habitat description is not available at this time.
Lintneria eremitoides	sage sphinx moth	Invertebrates	Yes	Not Listed	Not Listed	G2	S1?	No	Desert, grassland; sandy prairie or desert with sage; caterpillars feed on leaves of sage; adults emerge late spring or summer, but little information available; immatures develop directly to the pupal stage probably in 5-7 weeks, and pupae overwinter underground
Lirceolus bisetus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1	Yes	Habitat description is not available at this time.
Lirceolus cocytus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S1	No	Habitat description is not available at this time.
Lirceolus nidulus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S2S4	Not Evaluated	Habitat description is not available at this time.
Lirceolus smithii	Texas troglobitic water slater	Invertebrates	Yes	Not Listed	T 03/30/2020	G1G2	S1	Yes	Subaquatic, subterranean obligate, aquifer.
Lymantes nadineae	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S2	Yes	Habitat description is not available at this time.
Megachile amica	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G2	SH	Not Evaluated	Habitat description is not available at this time.