Metatarsonemus simplicissimus Attiah

Lofego, Antonio Carlos, Cavalcante, Ana Cristina Cerqueira, Demite, Peterson Rodrigo, Rezende, José Marcos, Ochoa, Ronald & Moraes, Gilberto José De, 2019, Reinstatement of Metatarsonemus Attiah (Acari: Tarsonemidae), with description of a new species, redefinition of the genus and a key to the world species, Zootaxa 4711 (2), pp. 307-329 : 311

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.

Figures

FIGURE 2. DIC photos of Metatarsonemus simplicissimusAttiah, adult female.A—dorsal surface (prodorsal shield and tergite C). B—dorsal surface (tergites D, EF and H). C—ventral surface of gnathosomal capsule and coxisternal plates I. D—Ventral surface of coxisternal plate III and IV. Abbreviations: ap, angular projection of coxisternal plate I; cf, coxisternal fissure; lr, linear ridge beside tegula

FIGURE 3. LT-SEM photo of ventral surface of Metatarsonemus simplicissimus Attiah. Abbreviations: cf, coxisternal fissure; lr, linear ridge beside tegula.