In the USA this species is known as the Arizona Bark Scorpion. This species
was previously known as C. sculpturatus. The specific name exilicauda
means "slender tail".
USA (Arizona, California, Nevada, New Mexico and Utah) and northwestern
This species is found in different places, but is usually
found under rocks, logs, the bark of trees, and other
surface objects. It is found in temperate and arid areas.
This scorpion can inflict a very painful sting, and is considered to be
medically significant. It is probably not as dangerous as previously
thought, and possesses no threat to most healthy adults. The sting can be
dangerous and life-threatening to infants and small children. Children
often show severe involuntary motor activity, agitation, and respiratory
difficulties after being stung by C. exilicauda. Even though, data
searches indicate that no deaths have been reported for this species in the
USA since 1968 (excluding deaths due to anaphylactic shock).
An antivenin active against C. exilicauda is experimental, only available
in Arizona, and is not approved by the FDA.
An LD50 value of 1,12 mg/kg is reported for this species, though this is
known to vary greatly even within a close population (F. Russell, personal
communication to K.J. McWest, 1994).
Gibly R. et al.
(1999). Continous intravenous midazolam infusion for Centruroides
exilicauda scorpion envenomation. Ann.
Emerg. Med., 34, p. 5.
Gateau, T. et al. (1994). Response to specific Centruroides
sculpturatus antivenom in 151 cases of scorpion stings. Clinical
Toxicology, 32 (2), pp. 165-171.
Bernstein J.N. et al. (1994). Efficacy of Antiscorpion (Centruroides
exilicauda) Fab. in a Mouse Model. Vet. Hum.
Toxicol., 36, p. 346.
Curry, S.C. et al (1983). Envenomation by the Scorpion Centruroides
sculpturatus. J. Toxicol. Clin. Toxicol., 21(4-5),
On the Internet:
Scott Stockwell on C. exilicauda
Pepe the Two-Tailed Scorpion (C.
Information about C.
Information System Of New Mexico (C. exilicauda)
exilicauda (sculpturatus) information
Gifttier Informationsdienst on C.
This species are found in many different color morphs,
and it is possible that the scorpions described as this
species actually are several species. A revision of the
species is needed.
This species is found in some pet collections, both in
US and Europe. Captive breeding have been reported. Due
to the strenght of its venom, this species should only be
kept by experienced keepers.
Centruroides exilicauda photo
by Jan Ove Rein (C)
Part of the information on this page was suplied by Kari McWest.