Species of Greatest Conservation Need
1124 species
| Scientifc Name | Common Name | Taxonomic Group | Federal Status | State Status | Global Rank | State Rank | Endemic |
|---|---|---|---|---|---|---|---|
| Nicrophorus americanus | American burying beetle | Invertebrates | E 08/14/1989 |
Not Listed | G3 | S1 | No |
| Nitocrellopsis texana | No accepted common name | Invertebrates | Not Listed | Not Listed | GNR | SU | Yes |
| Obovaria arkansasensis | southern hickorynut | Invertebrates | Not Listed | T 01/17/2010 |
G3G4 | S1 | No |
| Ochrotrichia capitana | No accepted common name | Invertebrates | Not Listed | Not Listed | G1G3 | S2? | Yes |
| Ochrotrichia guadalupensis | No accepted common name | Invertebrates | Not Listed | Not Listed | G1G2 | S1? | Yes |
| Oncopodura fenestra | No accepted common name | Invertebrates | Not Listed | Not Listed | G2G3 | S2? | Yes |
| Orconectes maletae | Kisatchie painted crayfish | Invertebrates | Not Listed | Not Listed | G3? | S2 | No |
| Ormiscus albofasciatus | No accepted common name | Invertebrates | Not Listed | Not Listed | GNR | S2 | Not Evaluated |
| Ormiscus irroratus | No accepted common name | Invertebrates | Not Listed | Not Listed | GNR | S1 | Not Evaluated |
| Osmia illinoensis | No accepted common name | Invertebrates | Not Listed | Not Listed | G1 | SH | Not Evaluated |
| Osmia watsoni | No accepted common name | Invertebrates | Not Listed | Not Listed | G2G3 | SNR | Not Evaluated |
| Pachyschelus fisheri | No accepted common name | Invertebrates | Not Listed | Not Listed | GNR | S1 | Yes |
| Palaemonetes texanus | No accepted common name | Invertebrates | Not Listed | Not Listed | G1G2 | S1? | Yes |
| Paraholsingerius smaragdinus | No accepted common name | Invertebrates | Not Listed | Not Listed | GNR | S2 | No |
| Paralimnetis texana | Texas paralimnetis | Invertebrates | Not Listed | Not Listed | G1 | S1 | Yes |
| Paramexiweckelia ruffoi | No accepted common name | Invertebrates | Not Listed | Not Listed | G1G2 | S2 | Yes |
| Paruroctonus williamsi | No accepted common name | Invertebrates | Not Listed | Not Listed | GNR | S1 | Yes |
| Patera leatherwoodi | Pedernales oval | Invertebrates | Not Listed | Not Listed | G1 | S1 | Not Evaluated |
| Perdita dolanensis | Dolan Falls perdita | Invertebrates | Not Listed | Not Listed | G1 | S1 | Yes |
| Phallocryptus sublettei | salt playa fairy shrimp | Invertebrates | Not Listed | Not Listed | G2 | S3 | No |
| Phoenicobiella schwarzii | No accepted common name | Invertebrates | Not Listed | Not Listed | GNR | S2 | No |
| Photuris flavicollis | sky island firefly | Invertebrates | Not Listed | Not Listed | G1G3 | SNR | Not Evaluated |
| Phreatoceras taylori | nymph trumpet | Invertebrates | Not Listed | Not Listed | G1G2 | S3 | Yes |
| Phreatodrobia conica | No accepted common name | Invertebrates | Not Listed | Not Listed | G1 | S2 | Yes |
| Phreatodrobia coronae | crowned cavesnail | Invertebrates | Not Listed | T 03/30/2020 |
G1G2 | S2 | Yes |