Stefan Friedrich

Additions to the knowledge of the oribatid mite genus Kalyptrazetes (Acari, Oribatida, Microzetidae)

Abstract A new species of microzetid oribatid mites of the genus Kalyptrazetes is described from upper soil and leaf litter in the primary evergreen lowland rainforest of Amazonian Peru. Kalyptrazetes bifurcatus Ermilov sp. nov. differs from other representatives of the genus by the morphology of rostral and centroventral epimeral setae and anterior parts of lamellae, the length of some notogastral, epimeral and genital setae, and the absence of an X-structure in the epimeral region. The main generic traits and an identification key to known species of Kalyptrazetes are provided.

New Pergalumna (Acari, Oribatida, Galumnidae) from Peru

Six species of oribatid mites of the genus Pergalumna (Oribatida, Galumnidae) are collected from the German Expedition to Amazonian Peru in 2013; of these, three are new for science, described from upper soil and leaf litter in the primary evergreen lowland rainforest. Pergalumna (Pergalumna) parapassimpunctata sp. nov. is morphologically most similar to P. (P.) passimpunctata Balogh & Mahunka, 1969, but differs from the latter by the presence of foveolate body surface, two pairs of porose areas Aa and minute interlamellar setae, and the absence of porose areas A3. Pergalumna (Pergalumna) krisperi sp. nov. is morphologically most similar to P. (P.) cardosensis Pérez-Íñigo & Baggio, 1986, but differs from the latter by the smaller body size, rostral and lamellar setae of medium size and the presence of four pairs of notogastral porose areas. Pergalumna (Pergalumna) lenticulata sp. nov. is morphologically most similar to P. (P.) decorata Balogh & Mahunka, 1977, but differs from the latter by the larger body size and the presence of lenticulus and bidentate rostrum. The species Pergalumna (Pergalumna) bryani Jacot, 1934 is recorded for the first time in Peru.

New species of the genera Scheloribates and Perscheloribates (Acari, Oribatida, Scheloribatidae) from Amazonian Peru

Abstract Two new species of oribatid mites of the family Scheloribatidae (Acari, Oribatida) are described from upper soil and leaf litter in the primary evergreen lowland rainforest of Amazonian Peru. Perscheloribates (Ecuadoribates) olszanowskii sp. nov. differs from P. (Ecuadoribates) pentasacculus Ermilov & Kalúz, 2012 by the presence of long interlamellar setae, rudimentary parts of translamellar line, ten pairs of notogastral setae and four pairs of notogastral saccules. The subgenus Perscheloribates (Ecuadoribates) is recorded in Peru for the first time. Scheloribates (Bischeloribates) wachteli sp. nov. differs from S. (Bischeloribates) bidactylus Hammer, 1961 by the presence of comparatively long notogastral setae c and la and rudimentary parts of translamellar line. Revised subgeneric diagnoses for Perscheloribates (Ecuadoribates) and Scheloribates (Bischeloribates) are given.

Figures 24 – 26 In Contribution To The Uropodina Mites Of Peru (Acari: Mesostigmata)

FIGURES 24 – 26. Origmatrachys peruensis sp. nov. paratype, larva. 24. Body in dorsal view. 25. Body in ventral view. 26. Ventral view of gnathosma, tritosternum, palp and first two segments of leg I.

New Faunistic and Taxonomic Data on Oribatid Mites (Acari, Oribatida) Of Peru

The present study is based on oribatid mite material (Acari, Oribatida) collected during an expedition to Amazonian Peru in May 2015. A list of identified taxa, including 56 species from 36 genera and 23 families, is presented; of these, eight species (Neoamerioppia phoretica, Ceratorchestes globosus, Truncozetes ecuadoriensis, Drymobates silvicola, Dynatozetes amplus, Scheloribates elegans, Allogalumna antillensis, Galumnopsis secunda), five genera (Drymobates, Dynatozetes, Allogalumna, Sacculogalumna, Galumnopsis) and two families (Drymobatidae, Galumnellidae) are recorded in Peru for the first time, the genus Sacculogalumna is recorded in the Neotropical region for the first time. A new species of Sacculogalumna (Galumnidae) is described; S. hexasacculata Ermilov sp. n. is similar to S. samarensis Ermilov et Corpuz-Raros, 2017, but differs by the presence of striate pattern on dorsal and ventral sides of body, rounded rostrum, smooth bothridial setae, complete sejugal suture, short and thin anal and adanal setae, setiform genital and central epimeral setae and two setae on anterior edges of genital plates, and the paraanal position of adanal lyrifissures in females and males.

Contribution to the knowledge of the oribatid mite genus Ceratorchestes (Acari, Oribatida, Peloppiidae)

Abstract The oribatid mite genus Ceratorchestes (Oribatida, Peloppiidae) is recorded in Peru for the first time. Two new species are described from upper soil and leaf litter in the primary evergreen lowland rainforest. Ceratorchestes (Ceratorchestes) processus Ermilov sp. nov. differs from C. (Ceratorchestes) setosus Balogh & Mahunka, 1969 by the presence of a strong dorso-anterior triangular process on trochanter IV and large tooth on the lateral ridge of the prodorsum, and by the localization of rostral seta on the prodorsum. Ceratorchestes (Paraceratorchestes) melzeri Ermilov sp. nov. differs from C. (Paraceratorchestes) variabilis Ermilov & Kalúz, 2012 by the presence of teeth on the lamellar cusp and a semioval furrow of epimere IV, by the localization of the translamella, epimeral seta 4b and adanal lyrifissure, and by the absence of a median tubercle on the rostrum. Updated generic and subgeneric diagnoses for Ceratorchestes are given. A new combination, Ceratorchestes (Paraceratorchestes) globosus Balogh & Mahunka, 1969 comb. nov., is proposed.

Two new species of Protoribates (Acari, Oribatida), with findings of Oripodoidea from Peru

ABSTRACT Two new species of oribatid mites of the genus Protoribates (Oribatida, Haplozetidae) are described based on adult specimens from upper soil and leaf litter in a primary evergreen lowland rainforest in Amazonian Peru. Protoribates curvicarinatus sp. nov. is morphologically most similar to P. antillensis Mahunka, 1985, but differs by the morphology of bothridial setae and length of interlamellar setae and lamellae. Protoribates paraecuadoriensis sp. nov. is morphologically most similar to P. ecuadoriensis Ermilov, Bayartogtokh, Sandmann, Marian and Maraun, 2013 from Ecuador, but differs by the morphology of tarsi I and II and localization of lamellar setae. Three species of Oripodoidea – Unguizetes incertus (Balogh and Mahunka, 1969), Perscheloribates rostratus (Hammer, 1958) and Benoibates borhidii Balogh and Mahunka, 1980 – are recorded in Peru for the first time.

A new species of Neoribates (Neoribates) (Acari: Oribatida: Parakalummidae) with key to the Neotropical species of the subgenus

Abstract A new species of oribatid mites of the subgenus Neoribates (Neoribates) (Oribatida: Parakalummidae), Neoribates (Neoribates) peruensis Ermilov sp. n., is described from soil and leaf litter in forests of Peru and Ecuador. This species differs from N. (Neoribates) fulvus Sellnick, 1923 by the smaller body size and the presence of prodorsal longitudinal ridge and straight anterior margin of notogaster. An identification key to the Neotropical species of Neoribates (Neoribates) is presented.

The genus Monoschelobates (Acari: Oribatida: Scheloribatidae)

Abstract A new species of oribatid mites of Monoschelobates (Oribatida: Scheloribatidae) is described from upper soil and leaf litter in the primary evergreen lowland rainforest of Amazonian Peru. Monoschelobates masani Ermilov sp. n. differs from all species of the genus by the presence of rostrum triangular and protruding (vs. rostrum rounded) and well-developed of exobothridial setae (vs. minute), and the absence of translamellar line (vs. lateral parts of line present). New generic diagnosis and an identification key to the known species of Monoschelobates are provided. Monoschelobates is recorded in the Peruvian fauna for the first time.