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)
Nicrophorus americanus	American burying beetle	Invertebrates	Yes	E 08/14/1989	Not Listed	G3	S1	No	Varies widely from oak-hickory and coniferous forest ridges tops or hillsides to riparian corridors and valley floor pastures; extremely xeric, saturated, or loose sandy soils unsuitable; adults primarily above ground, eggs in soil adjacent to buried carcass, teneral adults overwinter in soil
Nitocrellopsis texana	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	SU	Yes	Habitat description is not available at this time.
Obovaria arkansasensis	southern hickorynut	Invertebrates	Yes	Not Listed	T 01/17/2010	G3G4	S1	No	Clay, sand, and medium sized gravel substrates with low to moderate current; Neches, Sabine, and Cypress river basins
Ochrotrichia capitana	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G3	S2?	Yes	Habitat description is not available at this time.
Ochrotrichia guadalupensis	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1?	Yes	Collected from Texas, Culberson County, Smith Spring, 2.4 km North Park headquarters, Guadalupe Mountains National Park on 5/20/1991 by R. Hood. A few more specimens were collected from the same park again in yrs 1991 and 1987. S. Harris and S. Moulton 1993.
Oncopodura fenestra	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G2G3	S2?	Yes	Habitat description is not available at this time.
Orconectes maletae	Kisatchie painted crayfish	Invertebrates	Yes	Not Listed	Not Listed	G3?	S2	No	Streams of varying sizes and bottoms, almost always with leaf litter
Ormiscus albofasciatus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S2	Not Evaluated	Habitat description is not available at this time.
Ormiscus irroratus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S1	Not Evaluated	Habitat description is not available at this time.
Osmia illinoensis	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1	SH	Not Evaluated	Habitat description is not available at this time.
Osmia watsoni	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G2G3	SNR	Not Evaluated	Habitat description is not available at this time.
Pachyschelus fisheri	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S1	Yes	Habitat description is not available at this time.
Palaemonetes texanus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S1?	Yes	Collected in Comal and Hays counties (Middel Guadalupe and San Marcos watersheds).
Paraholsingerius smaragdinus	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S2	No	Habitat description is not available at this time.
Paralimnetis texana	Texas paralimnetis	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Yes	This species is reported from only two localities, both of which are artificial, human made wetlands in road side ditches; it is assumed to be a temporary wetland species like other large branchiopods.
Paramexiweckelia ruffoi	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S2	Yes	Gravel bottom and lacks vegetation
Paruroctonus williamsi	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S1	Yes	Habitat description is not available at this time.
Patera leatherwoodi	Pedernales oval	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Not Evaluated	Habitat description is not available at this time.
Perdita dolanensis	Dolan Falls perdita	Invertebrates	Yes	Not Listed	Not Listed	G1	S1	Yes	Habitat description is not available at this time.
Phallocryptus sublettei	salt playa fairy shrimp	Invertebrates	Yes	Not Listed	Not Listed	G2	S3	No	Saline playa lakes ranging from a few meters to a kilometer in diameter; usually very shallow with depth of water a function of rainfall, humidity, and basin structure; dry during summer and filling with fall rains (Rogers, 2003; Lang and Rogers, 2002).
Phoenicobiella schwarzii	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	GNR	S2	No	Habitat description is not available at this time.
Photuris flavicollis	sky island firefly	Invertebrates	Yes	Not Listed	Not Listed	G1G3	SNR	Not Evaluated	Habitat description is not available at this time.
Phreatoceras taylori	nymph trumpet	Invertebrates	Yes	Not Listed	Not Listed	G1G2	S3	Yes	Habitat description is not available at this time.
Phreatodrobia conica	No accepted common name	Invertebrates	Yes	Not Listed	Not Listed	G1	S2	Yes	Habitat description is not available at this time.
Phreatodrobia coronae	crowned cavesnail	Invertebrates	Yes	Not Listed	T 03/30/2020	G1G2	S2	Yes	Habitat description is not available at this time.