Molecules and morphology reveal a new aberrant harvestman genus of Ortholasmatinae (Opiliones, Dypsnoi, Nemastomatidae) from Mexico

Ortholasmatinae is one of the most striking groups of Opiliones, because its members exhibit a peculiar dorsal ornamentation pattern of cells, formed by fusion of anvil-shaped tubercles. During the systematic revision of several specimens of ortholasmatines, we found specimens with shared morphological characters with two genera <i>Trilasma</i> Goodnight &amp; Goodnight, 1942 and <i>Dendrolasma</i> Banks, 1894. In order to investigate their phylogenetic relationships, we performed model-based phylogenetic analyses using the mitochondrial protein-encoding cytochrome <i>c</i> oxidase subunit 1 (CO1) and the complete nuclear ribosomal small subunit 18S, including members of the five genera of this subfamily. The results support the creation of <i>Cryptolasma</i> Cruz-López, Cruz-Bonilla &amp; Francke, gen. nov., and two new species: <i>Cryptolasma aberrante</i> Cruz-López, Cruz-Bonilla &amp; Francke, sp. nov. (type species) and <i>Cryptolasma citlaltepetl</i> Cruz-López, Cruz-Bonilla &amp; Francke, sp. nov., which are from Xalapa and Orizaba Volcano, Veracruz, respectively. Additionally, our results suggest <i>Ruaxphilos petrukenvitchou</i> Goodnight &amp; Goodnight, 1945 is a <i>nomina dubia</i>. This study represents the first molecular hypothesis of Ortholasmatinae relationships, with <i>Cryptolasma</i> as the sister of the remaining ortholasmatine.www.zoobank.org/urn:lsid:zoobank.org:pub:3730EE48-9802-4B06-9DDF-EC1AFE9A3B61