Brownell, P. and Polis, G. 2001.  Scorpion Biology and Research.  Oxford Univeristy Press, Inc.  431 pp.

Fet, V. and P.A. Selden (eds.),
Scorpions 2001.  In Memoriam Gary A. Polis.  British Arachnological Society, Burnham Beeches, Bucks. xi+404 pp.

Fet, V., Sissom, W.D., Lowe, G. & Braunwalder, M.E. 2000: 
Catalog of the scorpions of the world (1758-1998). New York Entomol. Soc., New York.

Fet, V. & M.E. Solelad. 2005.  Contributions to scorpion systematics.  I.  On recent changes in high level taxanomy.  Euscorpius, 31,  pp 1-13

Francke, O.F. 1975. A new species of Diplocentrus from New Mexico and Arizona (Scorpionida, Diplocentridae).  J.  Arachnol., 2:107-118.

Francke, O.F. 1977. Redescription of Vaejovis globosus Borelli (Scorpionida:  Vaejovidae). Ent. News, 88(1-2):45-51.
Francke, O.F. 1977. Scorpions of the genus Diplocentrus from Oaxaca, Mexico (Scorpionida, Diplocentridae).  J.  Arachnol., 4:145-200.

Francke, O.F. 1982. Birth behavior in Diplocentrus bigbendensis Stahnke (Scorpiones, Diplocentridae). J. Arachnol., 10:157-164.

Francke, O.F. 1984. The life history of Diplocentrus bigbendensis Stahnke (Scorpiones, Diplocentridae). Southwestern Naturalist 29:387-93.

Francke, O.F and W.D. Sissom. 1984. The life history of Vaejovis coahuilae Williams (Scorpiones,  Vaejovidae), with comparison of the methods used to determine the number of molts to maturity.  J.  Arachnol., 12:1-20.

Fritts, D.A. and W.D. Sissom, 1996. Two new species of Diplocentrus (Scorpiones:  Diplocentridae) from Mexico.  Entomological News 107:  Jan. and Feb., 1996.

Gertsch, W.J. 1958. Results of the Puritan-American Museum expedition to Western Mexico. 4. The scorpions. Amer.Ms. Novit., 1903:1-20.

Gertsch, W.J. & M.E. Soleglad. 1966. Scorpions of the Vejovis boreus group (subgenus Paruroctonus) in North America.  Amer.Mus. Novit., 2278:1-54.

Gertsch, W.J. & M.E. Soleglad. 1972. Studies of North American scorpions of the genera Uroctonus and Vejovis. Bull. Amer. Mus. Nat. Hist.,148(4):549-608.

Haradon, R.M. 1984. New and redefined species belonging to the Paruoctonus baergi group (Scorpiones, Vaejovidae). J. Arachnol., 12:205-221.

Haradon, R.M. 1984.  New and redefined species belonging to the Paruroctonus borregoensis group (Scorpiones, Vaejovidae). J. Arachnol., 12:317-339.

Haradon, R.M. 1985. New groups and species belonging to the nominate subgenus Paruoctonus (Scorpiones, Vaejovidae). J. Arachnol., 13:19-42.

Lourenco, W.R. & W.D. Sissom. 2000.  Scorpions in Biodiversidad, taxonomia y biogeografia de artropodos de Mexico:  Hacia una sintesis de su concocimiento Vol. II. Chapter 5. pgs. 115-135.  Editors: Jorge Llorente Bousquets,

Nuha Yahia & W.D. Sissom. 1996.  Studies on the systematics and distribution of the scorpion Vaejovis bilineatus Pocock (Vaejovidae).  J. Arachnol.,24:81-88.

Polis, G.A. (ed.) 1990. The Biology of Scorpions.  587 pp. Stanford, CA, Stanford University Press.

Polis, G.A. (ed.) 1991. The Ecology of Desert Communities.  456 pp.  Tucson, AZ, University of Arizona Press.

Prendini, L. 2000:  Phylogeny and classification of the superfamily Scorpionoidea Latreille 1802 (Chelicerata, Scorpiones):  An exemplar approach. Cladistics 16:1-78.

Prendini, L. & W.C. Wheeler. 2005.  Scorpion higher phylogeny and classification, taxanomic anarchy, and standards for peer review in online pubslishing.  Cladistics, 21: 446-494.    Note:  This publication is another hypthosesis in the research community in reference to Soleglad, M.E. & V. Fet. 2003 and  Fet, V. & M.E. Solelad. 2005.  Opposing arguements with cladistic methods,. i.e., exemplar approach versus supraspecific terminal taxa and characters to reach strict monophyly of scorpion taxa.

Rowland, W.A. & J.R. Reddell. 1976. Annotated checklist of the arachnid fauna of Texas (excluding Acarida and Araneida).  Occas. Papers Mus., Texas Tech Univ.,38:1-25.

Shelley, R.M. & W.D. Sissom. 1995.  Distributions of the scorpions Centruroides vittatus(Say) and C. hentzi (Banks) in the United States and Mexico.  J. Arachnol.,23:100-110.

Sissom, W.D. and O.F. Francke. 1981. Scorpions of the genus Paruroctonus from New Mexico and Texas (Scorpiones, Vaejovidae). J. Arachnol.,9:93-108.

Sissom, W.D. & O.F. Francke, 1985. Redescriptions of some poorly knows species of the nitidulus group of the genus Vaejovis (Scorpiones, Vaejovidae).  J. Arachnol.,13:243-266.

Sissom, W.D. 1986. Diplocentrus colwelli, a new species of scorpion from northern Mexcio (Diplocentridae).  Insecta Mundi. 1:255-258.

Sissom, W.D. 1990. Systematics of Vaejovis dugesi Pocock, with descriptions of two new related species (Scorpiones, Vaejovidae).  The Southwestern Naturalist 35(1):47-53.

Sissom, W.D. 1991. Systematic Studies of the nitidulus group of the genus Vaejovis, with descriptions of seven new species (Scorpiones, Vaejovidae).  J. Arachnol.,19:4-28.

Sissom, W.D. 1994. Systematic Studies on Diplocentrus keyserlingii and Related Species from Central Oaxaca, Mexico (Scorpiones:  Diplocentridae).  Mitt. Zool. Mus. Berlin. 7(2):257-266.

Sissom, W.D. 1995. Diplocentrus mexicanus Peters, 1861 (Arachnida, Scorpiones):  proposed confirmation of the rediscovered holotype as the name bearing type.  Bulletin of Zoological Nomenclature 52(1)  March 1995.

Sissom, W.D. & Edmundo G. Santillan.  2004. 
A new species and new records for the Vaejovis nitidulus group, with a key to the Mexican species (Scorpiones, Vaejovidae). Texas Memorial Museum, Speleological Monographs, 6: 1-8

Sissom, W.D. & Francke, O.F. 1998. Taxonomic Comments on the Scorpion Diplocentrus mexicanus Peters and its Subspecies (Scorpiones, Diplocentridae). Mitt.Mus. Nat.kd.Berl., Zool. Reihe 74(2):259-260.

Sissom, W.D. & Hendrixon B. 2005.  A new species of Vaejovis (Scorpiones: Vaejovidea) from Coahuilae and Nuevo Leon, and a key to vaejovid species in northeeastern and north-central Mexico.  Zootaxa 1088:  33-43. 
Note:  Great article with a key to species.

Soleglad, M.E. & V. Fet. 2003.  High-level systematics and phylogeny of the extant scorpions (Scorpiones:  Orthosterni).  Euscorpius, 11, pp 1-175

Soleglad, M.E. & V. Fet. 2005.  A new Scorpion genus (Scorpiones:  Vaejovidae) from Mexico.  Euscorpius, 24, 1-13.

Stahnke, H.L. 1967. Diplocentrus bigbendensis, a new species of scorpion.  Entomol. New 78(7): 173-179.

Stahnke, H.L. 1970. Scorpion nomenclature and mensuration.  Entomol. News,81:297-316.

Stahnke, H.L. 1976. The determination of the type-species of Diplocentrus (Scorpionida).  Arizona Academy of Sciences, 11(3):58-60.

Stahnke, H.L. 1976. A redescription of Diplocentrus whitei (Scorpionida)  Entomol. News, 87(1&2):49-56.

Stahnke, H.L. 1981. A study of the syntypes of Diplocentrus keyserlingii ( Diplocentridae).  Bull. Amer. Mus. Nat. Hist. 170:34-45.

Stockwell, S.A. & J.A. Nilsson. 1987. A new species of Diplocentrus Peters from Texas (Scorpiones, Diplocentridae). J. Arachnol.,15:151-156.

Stockwell, S.A. 1992.  Systematic observations on North American Scorpionida with a key and checklist of the families and genera.  Journal of Medical Entomology, 29(3): 407-422.

Stockwell, S.A. & A.S. Baldwin.  2001. A new species of Diplocentrus Peters from Texas (Scorpiones, Diplocentridae). J. Arachnol.,29:304-311.

Williams, S.C. 1968. Methods of sampling scorpion populations.  Proceedings of the California Academy of Sciences (4):36:221-230.

Williams, S.C. 1968.  Scorpions from northern Mexico:  five new species of Vejovis from Coahuila, Mexico.  Occasional Papers of the Califonia Academy of Sciences, 68: 1-24.

Williams, S.C. 1970. A redescription of the scorpion Vejovis bilineatus Pocock (Scorpionida:  Vejovidae).  Pan-Pacific Entomologist 46(4):238-241.

Williams, S.C. 1987. Scorpion Bionomics.  Ann. Rev. Entomol. 32:275-295.
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