New faunistical and taxonomic data on oribatid mites (Acari: Oribatida) of Taiwan

Abstract

The present study is based on oribatid mite material collected in Taiwan in 2017–2019. A list of identified taxa, including 141 species/subspecies from 88 genera and 47 families is provided; of these, 36 species/subspecies, 13 genera and five families are recorded for the first time in the Taiwan fauna, and eight species and one genus are recorded for the first time in the Oriental region. Two new species are described. Tyrphonothrus nivnu n. sp. (description based on adult) is similar to Tyrphonothrus altissimus (Piffl, 1971), T. cajamarcensis (Hammer, 1961) and T. wallworki (Starý and Block, 1995) in general morphological traits (notogastral ridges developed; tridactylous legs; notogastral setae e2, h1, h2, and p2 long, setiform, with attenuate tip, other setae of medium length, setiform; high number of genital setae; absence of notogastral ornamentation; and comparatively large body size), but differs from these listed species by the barbed notogastral setae and comparatively long notogastral setae c1, c2, c3, and e1. Jacotella puyuma n. sp. (description based on adult and tritonymph) is similar to Jacotella neonominata Subías, 2004 in general morphological traits (centrodorsal notogastral part with two longitudinal ridges, posteriorly fused, each ridge with two lateral transverse branches; absence of notogastral ornamentation; notogastral seta h1 distinctly longer than other notogastral setae), but differs from the latter by the narrowly elongate bothridial head, flagellate notogastral setae h1 and p1, the length of notogastral setae, and the absence of additional longitudinal ridges connected lateral branches of median ridges (in adult); and by the long gastronotic seta h1 similar in length to bothridial seta, seta h2 similar to h3 and lp and seta dm clearly longer than da on larval exuvium (in tritonymph).

Morphological Ontogeny and Ecology of a Common Peatland Mite, Nanhermannia coronata (Acari, Oribatida, Nanhermanniidae)

“…Identification of Nanhermannia species is not easy because they are relatively similar to each other by having a similar body shape, structure of pits and shape of notogastral setae. The species differ from one another by the shape of protuberances on the posterior margin of the prodorsum and the number of sclerotized tubercles, which are considered diagnostic in Nanhermannia, but these characters vary in some species [3][4][5][6][7][8][9][10], including N. coronata Berlese, 1913, being a source of confusion. For example, during the revision of the twenty-year-old oribatid mite collection of the Institute of Biology, University of Latvia, a high discrepancy in the identification of N. coronata was detected, and ca.…”

“…The morphological ontogeny of N. cf. coronata was investigated by Ermilov and Łochy ńska [9], but these authors treated the leg setation generally, without labelling of leg setae, which we consider species-specific. Moreover, we found some differences in the morphology of juveniles of this species investigated by these authors and those studied herein, which probably illustrates the morphological variability of the species.…”

New species of Plateremaeoidea (Acari, Oribatida) from Mexico

“…Also, J. ornata has specifically band-like cerotegument (versus absent) on the notogaster and five (versus seven) pairs of genital setae; J. puyuma smaller (length: 365-415 versus 570-645) and has (versus absent) specific ridge-like structures in the central part of notogaster and deep depression in anterior part of the prodorsum. The tritonymphal instar in Jacotella is known for J. neonominata (see Seniczak and Seniczak 2011) and J. puyuma (see Ermilov and Liao 2021). The tritonymph of J. alexandrovskiyi differs from those in both species by the length and morphology of bothridial (very long, subflagellate, with short, dense cilia versus distinctly shorter, fusiform, barbed), exobothridial (long, thickened versus minute, spiniform) and gastronotic (h 1 very long, subflagellate, others medium-sized or short, slightly thickened versus c 3 very long, subflagellate, others medium-sized or short, phylliform except long seta h 1 in J. puyuma), and exuvial (da, dm, dp medium-sized, thick c 1 , c 2 , la, lm, lp, h 2 , h 3 , p 1 shorter, slightly thickened versus da, dm, dp, c 1 , c 2 , la, lm, lp, h 2 , h 3 , p 1 mostly short, phylliform) setae, and the number (two pairs versus three pairs) of adanal setae.…”

“…The description of J. alexandrovskiyi is based on adult and tritonymphal instars. At present, the juvenile instars of Jacotella are known only in two species Seniczak 2011; Ermilov andLiao 2021): J. neonominata Subías, 2004 (all instars are studied) and J. puyuma Ermilov and Liao, 2021 (tritonymph). The morphological comparison for juveniles of Gymnodamaeidae was provided by Bayartogtokh and Ermilov (2013), with subsequent additions in Ermilov and Salavatulin (2022).…”

Espermiogenese e morfologia dos espermatozoides de Iporangaia pustulosa (Arachnida : Opiliones: Laniatores)

“…Mitocôndrias estão presentes tanto em espermatozóides flagelados quanto nos aflagelados. Nos flagelados, estas estão localizadas na peça intermediária, enquanto nos aflagelados, elas são encontradas em regiões variadas, como por exemplo, embebidas no núcleo (Alberti, 1980b, Alberti et al, 1991Witalinski, 1982).…”