Tityus cylindricus ( Karsch, 1879 )

De, Claudio Augusto R., Candido, Denise M., Lucas, Sylvia Marlene & Brescovit, Antonio Domingos, 2009, On the Tityus stigmurus complex (Scorpiones, Buthidae), Zootaxa 1987, pp. 1-38 : 35

Tityus cylindricus ( Karsch, 1879) , species revalidated

Isometrus cylindricus Karsch, 1879: 114 –115. Holotype ♂ from Bahia, Brazil (ZMB 105, examined). Tityus cylindricus: Kraepelin, 1899 ; Fet et al, 2000: 262.

Comments. According to Fet et al. (2000) “In his original description”, Karsch (1879: 115) indicated that Isometrus cylindricus was perhaps the male of Isometrus stigmurus Thorell, 1876 . Kraepelin, in 1891, listed it as a questionable synonym of Tityus bahiensis , but in 1899 reverted to listing it as a questionable synonym of Tityus stigmurus ” (Fet et al, 2000). The type specimen ( Fig. 23 A–B) is in poor condition, probably due to the initial preservation in a dry collection. This species is not a synonym of T. stigmurus and does not belong to the T. stigmurus complex. It has blackish coloration, absence of posterior spinoid granules on the dorsal carinae of metasomal segments II–IV ( Fig. 23 D–E), metasomal segments and telson very slender and rhomboid shape of subaculear granule ( Fig. 23 D–E), whereas in species of the T. stigmurus complex the metasomal segments are stouter and the subaculear granule is spiniform. The type locality is uncertain, it is stated as “Bahia” in Brazil, without concise location data. T. cylindricus it is associated with he subgenus Atreus (Lourenço, 2006) , by having blackish coloration, metasomal segments and telson very slender ( Fig. 23 D–E) and rhomboid shape of subaculear granule. More details will be given in a future work which will encompass the species of the subgenus Atreus .

Figures

FIGURE 23. T. cylindricus. (Holotype ♂ ZMB 105; Bahia, Brazil). Dorsal (A) and ventral (B) view; Right palp in dorsal view (C); Metasomal segments and telson in lateral view (D – E).