A new species of the genusMarx (Scorpiones, Buthidae) from western Michoacán State, México using molecular and morphological evidence.

Source: PubMed, NCBI / U.S. National Library of Medicine

A new species of scorpion belonging to the genusMarx, 1890 is described from the Coalcomán mountain range, western Michoacán State, Mexico. Its general aspect resemblesQuijano-Ravell & Ponce-Saavedra, 2016, and(C. L. Koch, 1844), but it is a smaller species having lower pectinal tooth counts; also, males ofhave the pedipalp chelae slightly thicker, whereashas a subaculear tubercle nearer to the base of the aculeus. Another species with similar aspect isPocock, 1902; however, a preliminary molecular analysis of the mitochondrial gene mRNA 16S showed genetic divergence (measured as p-distance) near to 10% between these species, and lower differences between the new species with respect to(4.63%) and(5.07%). The molecular evidence together with the morphological characters (integrative taxonomy) are sufficient for recognizing the Coalcomán population as a separate and valid species.