| Girty G. H. (1929) New Carboniferous invertebrates - II, Journal of the Washington Academy of Sciences 19, 406-415 |
| King R. E. (1931) The Geology of the Glass Mountains, Texas, Part II, Faunal summary and correlation of the Permian formations with description of Brachiopoda, The University of Texas Bulletin 3042, 1-245 |
| Girty G. H. (1931) New Carboniferous invertebrates - III, Journal of the Washington Academy of Sciences 21, 390-397 |
| Plummer F. B., Scott G. (1937) Upper Paleozoic ammonites in Texas, The University of Texas Bulletin 3701, 1-516 |
| Miller A. K., Furnish W. M. (1940) Permian ammonoids of the Guadalupe Mountain region and adjacent area, Geological Society of America Special Paper 26, 1-242 |
| Miller A. K. (1945) Permian nautiloids from the Glass Mountains and the Sierra Diablo of west Texas, Journal of Paleontology 19 3, 282-294 |
| Knight J. B. (1945) Some new genera of Paleozoic Gastropoda, Journal of Paleontology 19 6, 573-587 |
| Miller A. K., Youngquist W. (1949) American Permian nautiloids, Geological Society of America Memoir 41, 1-218 |
| Skinner J. W., Wilde G. L. (1954) The fusulinid subfamily Boultoniinae, Journal of Paleontology 28, 434-444 |
| Stehli F.G. (1954) Lower Leonardian Brachiopoda of the Sierra Diablo, Bulletin of the American Museum of Natural History 105 3, 257-358 |
| Yochelson E. L. (1956) Permian Gastropoda of the southwestern United States. 1. Euomphalacea, Trochonematacea, Pesudophoracea, Anomphalacea, Craspedostomatacea, and Platyceratacea, Bulletin of the American Museum of Natural History 110 3, 173-276 |
| Batten R. L. (1958) Permian Gastropoda of the southwestern United States. 2. Pleurotomariacea: Portlockiellidae, Phymatopleuridae, and Eotomariidae, Bulletin of the American Museum of Natural History 114 2, 153-246 |
| Finks R. M. (1960) Late Paleozoic sponge faunas of the Texas region: The siliceous sponges, Bulletin of the American Museum of Natural History 120 1, 1-160 |
| Yochelson E. L. (1960) Permian Gastropoda of the southwestern United States. 3. Bellerophontacea and Patellacea, Bulletin of the American Museum of Natural History 119 4, 208-293 |
| Newell N. D., Boyd D.W. (1970) Oyster-like Permian Bivalvia, Bulletin of the American Museum of Natural History 143 4, 221-281 |
| Skinner J. W. (1971) New Lower Permian fusulinids from Culberson County, Texas, University of Kansas Paleontological Contributions 53, 1-10 |
| Cooper G. A., Grant R. E. (1974) Permian brachiopods of West Texas, II, Smithsonian Contributions to Paleobiology 15, 233-793 |
| Cooper G. A., Grant R. E. (1975) Permian Brachiopods of West Texas, III, Smithsonian Contributions to Paleobiology 19, 795-1921 |
| Spinosa C., Furnish W.M., et al (1975) The Xenodiscidae, Permian ceratitoid ammonoids, Journal of Paleontology 49 2, 239-283 |
| Newell N. D., Boyd D.W. (1975) Parallel evolution in early trigonacean bivalves, Bulletin of the American Museum of Natural History 154 2, 55-162 |
| Cooper G. A., Grant R. E. (1976) Permian Brachiopods of west Texas, V, Smithsonian Contributions to Paleobiology 24, 2609-3159 |
| Smith A. G. (1976) Two new Permian chitons from west Texas (Mollusca: Polyplacophora), The Veliger 18, 281-288 |
| Cooper G. A., Grant R. E. (1976) Permian Brachiopods from West Texas, IV, Smithsonian Contributions to Paleobiology 21, 1923-2607 |
| Cooper G. A., Grant R. E. (1977) Permian Brachiopods of West Texas, VI, Smithsonian Contributions to Paleobiology 32, 3161-3370 |
| Mapes R. H. (1979) Carboniferous and Permian Bactritoidea (Cephalopoda) in North America, University of Kansas Paleontological Contributions 64, 1-75 |
| Hoare R. D., Smith A. G. (1984) Permian Polyplacophora (Mollusca) from west Texas, Journal of Paleontology 58 1, 82-103 |
| Fedorowski J. (1985) Diffingiina, a new suborder of the rugose corals from SW Texas, Acta Palaeontologica Polonica 30, 209-240 |
| Fedorowski J. (1987) Upper Paleozoic rugose corals from southwestern Texas and adjacent areas: Gaptank Formation and Wolfcampian corals, Palaeontologia Polonica 48, 3-271 |
| Erwin D. H. (1988) Permian Gastropoda of the southwestern United States: Cerithiacean, Acteonacea, and Pyramidellacea, Journal of Paleontology 62 4, 566-575 |
| Erwin D. H. (1988) The genus Glyptospira (Gastropoda: Trochacea) from the Permian of the southwestern United States, Journal of Paleontology 62 6, 868-879 |
| Mikesh D. L., Glenister B. F., et al (1988) Stenolobulites n. gen., Early Permian ancestor of predominantly Late Permian paragastrioceratid subfamily Pseudogastrioceratinae, University of Kansas Paleontological Contributions 123, 1-19 |
| Batten R. L. (1989) Permian Gastropoda of the southwestern United States. 7. Pleurotomariacea: Eotomariidae, Lophospiriidae, Gosseletinidae, American Museum Novitates 2958, 1-64 |
| Brezinski D. K. (1992) Permian trilobites from west Texas, Journal of Paleontology 66 6, 924-943 |
| Newell N. D., Boyd D.W. (1995) Pectinoid bivalves of the Permian-Triassic crisis, Bulletin of the American Museum of Natural History 227, 1-95 |
| Finks R. M. (1995) Some new genera of Paleozoic calcareous sponges, University of Kansas Paleontological Contributions 6, 1-9 |
| Fedorowski J., Bamber E. W., et al (2007) , Lower Permian colonial rugose corals, western and northwestern Pangaea: taxonomy and distribution, 1-231 |
| Temkin I., Pojeta J. (2010) Cassiavella galtarae, new species, new genus: a new Permian bivalve and its significance for pterioidean systematics, Journal of Paleontology 84 6, 1152-1176 doi:10.1666/10-022.1 |
| Finks R. M. (2010) The sponge family Guadalupiidae in the Texas Permian, Journal of Paleontology 84 5, 821-847 |
| Tapanila L., Pruitt J. (2013) Unraveling species concepts for the Helicoprion tooth whorl, Journal of Paleontology 87, 965-983 |
