Oribatid Mites from Several Mires in Northern Japan II. Three Species of the Genus Hydrozetes (Acari: Oribatida) including Two New Species

源一, 栗城

doi:10.2300/acari.19.77

J. Acarol. Soc. Jpn.

2010

DOI: 10.2300/acari.19.77

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Oribatid Mites from Several Mires in Northern Japan II. Three Species of the Genus Hydrozetes (Acari: Oribatida) including Two New Species

栗城源一¹

Abstract: Two new species of Hydrozetes are described from several Sphagnum mires in Japan: Hydrozetes japonicus sp. n. and H. harundinosus sp. n. Local variability and certain ecological characters are surveyed in H. japonicus, a common species in the Sphagnum mires of North Japan. H. lemnae (Coggi, 1897) was collected for the fi rst time from Japan. The Japanese species is redescribed in this paper.

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Cited by 5 publications

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New and interesting moss mites (Acari, Oribatida) from South Africa, with description of two new species

Ermilov

Theron

Hugo-Coetzee

2017

saa

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The present study is based on oribatid mite material (Acari, Oribatida) collected from moss (Sphagnum sp.) on the seepage area below a permanent spring in South Africa. A list of identified taxa, including 17 species from 15 genera and 11 families, is presented; of these, six species (Haplochthonius simplex, Trhypochthoniellus longisetus, Tyrphonothrus maior, Neoamerioppia polygonata, Trachyoribates ovulum, Trichogalumna nipponica) and three genera (Haplochthonius, Trhypochthoniellus, Trachyoribates) are recorded in the fauna of this country for the first time, and three species (Malaconothrus hexasetosus, Mucronothrus braziliensis, Limnozetes ciliatus,), three genera (Mucronothrus, Limnozetes, Nesozetes) and one family (Nesozetidae) are recorded in the Ethiopian region for the first time. Two new species belonging to the genera Trhypochthoniellus and Hydrozetes are described. Trhypochthoniellus malaconothroiformis sp. nov. differs from the morphologically most similar species, Trhypochthoniellus ramosus Hammer, 1982 by the absence of strongly branched notogastral and leg setae, and the presence of seven pairs of genital setae. Hydrozetes sphagnicolus sp. nov. differs from all known species of Hydrozetes by the much longer notogastral setae with attenuate tips.

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New and interesting moss mites (Acari, Oribatida) from South Africa, with description of two new species

Ermilov

Theron

Hugo-Coetzee

2017

saa

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Morphological ontogeny of Hydrozetes paulista (Acari, Oribatida, Hydrozetidae), with comments on Hydrozetes Grandjean

Seniczak

Sant'Anna

2017

saa

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The morphological ontogeny of Hydrozetes paulista Pérez-Íñigo & Baggio, 1989 is described and illustrated. This species is monodactylous as adult, with short, setiform bothridial seta and belongs to the “lacustris species group”. It has 13 pairs of notogastral setae, including c2, but seta c3 is retained by some individuals. Most gastronotal setae of larva are of medium size and barbed, except for longer setae lm, lp and h2, and short and smooth c1 and h3. In the nymphs setae of l-series, h1 and h2 are very long, smooth and dark pigmented, setae h3 and p1 are of medium size, thick, pointed and barbed, and other setae are short and usually smooth; seta lm is located anterior to the gland opening. Hydrozetes paulista is bisexual, but in this study only females were present.

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Ecology and biology of Hydrozetes paulista (Acari: Oribatida) in the benthic zone of a temporary lake in Brazil

Seniczak

Sant'Anna

et al. 2018

saa

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Oribatid mites are mainly terrestrial animals, but some are aquatic, including all species of the genus Hydrozetes (Hydrozetidae). They have often been recorded in abundance on the water’s surface, while their presence in the benthic zone is poorly documented. A litterbag experiment was carried out in Coutos Lake, a shallow temporary lake in Southeast Brazil, in order to study the ecology and biology of Hydrozetes paulista. This mite species greatly dominated the benthic invertebrate community (82%), and at the end of the experiment it reached a density (652 individuals per 1 g of dry substrate) higher than that ever previously reported before for any Hydrozetes species. This density was correlated with some water parameters, stronger with conductivity, and less with temperature. The adults dominated in the stage structure (constituting over 80% of sample population), but the participation of the juveniles increased with the time. Larvae were first noticed on 25th day of experiment and after that were present for the rest of the season. During the course of this experiment, mite fecundity and body size decreased. This species is known as bisexual, but we observed only females in the 5354 adults we collected.

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Oribatid Mites from Several Mires in Northern Japan II. Three Species of the Genus Hydrozetes (Acari: Oribatida) including Two New Species

Cited by 5 publications

References 6 publications

New and interesting moss mites (Acari, Oribatida) from South Africa, with description of two new species

New and interesting moss mites (Acari, Oribatida) from South Africa, with description of two new species

Morphological ontogeny of Hydrozetes paulista (Acari, Oribatida, Hydrozetidae), with comments on Hydrozetes Grandjean

Ecology and biology of Hydrozetes paulista (Acari: Oribatida) in the benthic zone of a temporary lake in Brazil

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