Reinstatement of Metatarsonemus Attiah (Acari: Tarsonemidae), with description of a new species, redefinition of the genus and a key to the world species Author Lofego, Antonio Carlos Author Cavalcante, Ana Cristina Cerqueira Author Demite, Peterson Rodrigo Author Rezende, José Marcos Author Ochoa, Ronald Author Moraes, Gilberto José De text Zootaxa 2019 2019-12-16 4711 2 307 329 journal article 24605 10.11646/zootaxa.4711.2.5 2f813356-cd98-4a77-b4dc-78a4b15bde56 1175-5326 3577031 0850D3FF-D053-49E0-B67C-A33DE117D1CB Metatarsonemus simplicissimus Attiah ( Figs. 2–3 ) Metatarsonemus simplicissimus Attiah, 1970: 188 . Tarsonemus simplicissimus , Lindquist, 1985: 1279 ; Lin & Zhang, 2002: 280 . Diagnosis: (modified from Lindquist, 1985 ) Adult of both sexes: Gnathosoma with a thick, muscular pharyngeal pump, below base of which is a distinctive, transverse groove on external ventral surface of gnathosomal capsule. Sensory cluster on tibia I complete, both solenidia ( φ1 and φ2 ) present. Setae pl´´ present on tarsus II, spinelike. Female : Vertical setae v1 shorter than scapular setae sc2 , and setae c1 shorter than setae c2 . Ventral surface of podosoma with a set of several fissures: a pair of angulate fissures near base of coxisternal setae 1a , a of pair curved fissures anterolaterad bases of coxisternal setae 2a , a pair of angulate fissures near base of coxisternal setae 3b , and a conspicuous, longitudinal, unpaired fissure at posterior end of poststernal apodeme, nearly drop shaped, with an acute extension on posterior extremity. Male : vertical setae v1 longer than scapular setae sc2 on prodorsum; setae c2 longer than c1 and d . Apodeme 5 present. Solenidion ω larger and more swollen on tarsus II than on tarsus I, yet no longer than greatest width of tarsus II; tibial tactile setae not longer than femorogenu IV.