Microtityus Kjellesvig-Waering, 1966

Moreno-González, Jairo A., Bertani, Rogério & Carvalho, Leonardo S., 2024, On one of the smallest Amazonian scorpions: a new species of Microtityus Kjellesvig-Waering, 1966 (Scorpiones, Buthidae) from Brazil, with amended diagnosis and potential distribution analysis for the genus, Zoosystema 46 (10), pp. 245-268 : 249

publication ID	https://doi.org/ 10.5252/zoosystema2024v46a10
publication LSID	lsid:zoobank.org:pub:97472303-AA23-4E68-BD7F-1EE5CDA5BE20
DOI	https://doi.org/10.5281/zenodo.11084290
persistent identifier	https://treatment.plazi.org/id/0387878A-FFD0-FFC6-FF5A-C020FEE6FAF6
treatment provided by	Plazi
scientific name	Microtityus Kjellesvig-Waering, 1966
status

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Genus Microtityus Kjellesvig-Waering, 1966 View in CoL

Microtityus Kjellesvig-Waering, 1966: 130 View in CoL .

TYPE SPECIES. — Microtityus rickyi Kjellesvig-Waering, 1966 by original designation.

INCLUDED SPECIES. — Forty-two species ( Table 1 View TABLE 1 ).

DISTRIBUTION. — Northern South America ( Brazil, Colombia, Venezuela) and the Caribbean ( British Virgin Islands, Cuba, Dominican Republic, Puerto Rico, Trinidad and Tobago, Virgin Islands [ United States]). See Figure 10A View FIG , Table 1 View TABLE 1 and Appendix 1.

AMENDED DIAGNOSIS. — Among the buthid genera of the Americas, Microtityus shares the presence of telotarsi I-IV with ventral setae distributed in two submedian rows with Alayotityus (Armas, 1973) ; Chaneke ( Francke, Teruel & Santibáñez-López, 2014) ; Heteroctenus Pocock, 1893 ; Ischnotelson ( Esposito, Yamaguti, Souza, Pinto-da-Rocha & Prendini, 2017); Jaguajir ( Esposito, Yamaguti, Souza, Pinto-da-Rocha & Prendini, 2017); Tityopsis (Armas, 1974) ; Tityus (C. L. Koch, 1836) [in part]; Troglorhopalurus (Lourenço, Baptista & Giupponi, 2004) , and Zabius (Thorell, 1893) .

However, Microtityus may be readily recognized from these genera based on the presence of: 1) a subtriangular carapace with an anterior margin strongly narrowed compared to the posterior margin ( Fig. 2A, B View FIG ); 2) tergites I-VI each with three ( Fig. 2A, B View FIG ) to five dorsal carinae; 3) a subpentagonal sternum ( Fig. 5A, B View FIG ); and 4) a female pectinal plate strongly projected posteriorly ( Fig. 5B View FIG ). Whereas, the other genera share: 1) a trapezoidal carapace with an anterior margin slightly to moderately narrowed compared with the posterior margin; 2) tergites I-VI with three carinae ( Alayotityus , Ischnotelson and Zabius ) or a single carina ( Chaneke , Heteroctenus , Jaguajir , Tityus , Tityopsis and Troglorhopalurus ); 3) a subtriangular sternum; and 4) a female pectinal plate not projected ( Chaneke , Heteroctenus [in part], Ischnotelson , Jaguajir [in part], Tityus , Troglorhopalurus and Zabius ) or slightly projected posteriorly ( Heteroctenus [in part] and Jaguajir [in part]).