Article

Thirteen new species from the Shirakami-sanchi World Heritage Area, Nippon (Acari: Oribatida)

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Abstract

The following nineteen new species were described from beech forests in the Shirakami-sanchi World Heritage Area in Nippon: Phthiracarus (A.) shirakamiensis spec. nov., Phthiracarus miyamaensis spec. nov., Neoxenillus scopulus gen. nov. spec. nov., Cepheus spinosus spec. nov., Carabodes silvosus spec. nov., Bunabodes truncatus gen. nov., spec. nov., Medioxyoppia hamata spec. nov., Coronoquadroppia trapezoidea spec. nov., Quadroppia minima spec. nov., Rhynchobelba planeta spec. nov., Suctobelbella silva spec. nov., Suctobelbella margarita spec, nov., Suctobelbella (F.) muronokiensis spec. nov., Suctobelbella angulata spec. nov., Suctobelbella shironeseta spec. nov., Unicobelba aomoriensis spec. nov., Unguizetes striatus spec. nov., Scheloribates bunaensis spec. nov., Eupelops miyamaensis spec. nov.

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... Among the known species of Medioxyoppia, the following species, M. acuta (Aoki, 1984), M. hamata Fujikawa, 2004, M. mastigophora (Golosova, 1970), M. nagoyae Ohkubo, 1991, and M. yuwana (Aoki, 1983) resemble M. jejudoensis sp. nov. in the very long, slender bothridial setae, which have a long distal tip (see Golosova 1970;Aoki 1983Aoki , 1984Ohkubo 1991;Fujikawa 2004). ...
... Among the known species of Medioxyoppia, the following species, M. acuta (Aoki, 1984), M. hamata Fujikawa, 2004, M. mastigophora (Golosova, 1970), M. nagoyae Ohkubo, 1991, and M. yuwana (Aoki, 1983) resemble M. jejudoensis sp. nov. in the very long, slender bothridial setae, which have a long distal tip (see Golosova 1970;Aoki 1983Aoki , 1984Ohkubo 1991;Fujikawa 2004). The first species mentioned above, M. acuta, differs from the new species in the strongly developed interbothridial ridge and humeral projection on notogaster ( The other known species of Medioxyoppia have relatively short bothridial seta with no long distal tip, which clearly differentiates them from the present new species. ...
... Four Japanese species, M. acuta (Aoki, 1984), M. hamata Fujikawa, 2004, M. nagoyae Ohkubo, 1991 (Aoki, 1983), and the Russian Far East species, M. mastigophora (Golosova, 1970) are different from M. brevisetosa sp. nov. in the very long, but slender bothridial setae, which have long distal tip (bothridial seta in M. brevisetosa sp. ...
... The second genus we studied, Medioxyoppia, is one of the smaller genera of Oppiidae, which currently comprises eight named species. Representatives of this genus are exclusively distributed in the eastern Palaearctic region, where most of them have been described from Japan (Aoki 1983(Aoki , 1984Ohkubo 1991;Fujikawa 2004Fujikawa , 2010Fujikawa , 2015, with only single species from the Russian Far East (Golosova 1970). So, we add here two more species with an East Asian distribution, and in our opinion, there is a great chance of finding these new species in other areas adjacent to Korea. ...
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The oribatid mite family Oppiidae is highly diverse in the northern hemisphere, but in Korea it is represented by only 16 species. Herein, we propose three new species, Moritzoppia coreana sp. nov., Medioxyoppia brevisetosa sp. nov. and Medioxyoppia claviacuminata sp. nov., and provide a supplementary description of a little known species, Oxybrachioppia ctenifera, which is newly reported from Korea. All species are inhabitants of the litter and soil of mixed forests, and following the descrip�tions and comparisons, we discuss aspects of the distribution, diversity of each genus, and habitat ecology of species reported herein.
... The species S. breviseta (Balogh, 1986) was described from Bogota, Columbia without information on sample type (Balogh 1986); S. dubius Hammer, 1979 was collected from ferns, liverworts, Selaginella, mosses on branches and roots, different small plants and dead leaves on mountain slope with scattered, tall trees and shrubs in the Selecta Park, Java (Hammer 1979); S. elevatus Mahunka, 1987 was found in dry and decaying leaf litter in forests of Sepilok, Borneo (Mahunka 1987); S. foveolatus Luxton, 1988 was recorded from wet moss beneath beech in Canaan Road, Takaka Hill, Nelson, New Zealand (Luxton 1988); S. franzi (Balogh, 1986) was described from soil in Cuesta la Starria, Chile (Balogh 1986); S. granulatus (Balogh & Mahunka, 1969) was collected from decaying leaves interwoven with hyphae in forest about 20 km from Manaus, Brazil (Balogh & Mahunka 1969), also known from Paraguay without information on sample type (Balogh & Mahunka 1981) and different Brazilian localities (see summarized data from Oliveira et al. 2017); S. longisetus (Balogh, 1986) was reported from litter or rain forest in eastern Cordilles at Monterredondo, Colombia (Balogh 1986); S. makarchevae Sitnikova, 1975 was found from litter and dust of stub of forest in Primorsky Kray, Russia (Sitnikova 1975a); S. subniger (Ewing, 1917) was collected from ground under old pieces of forest in Iowa, U.S.A. (Ewing 1917); S. tohokuensis Fujikawa, 2003 was described from lichens and misses on the trunks of living beech trees in Nippon, Japan (Fujikawa 2003); S. undulatus undulatus Aoki, 1965 was reported from Sado Island, Japan without information on sample type (Aoki 1965), some localities in Japan (e.g. Aoki et al. 2004;Harada et al. 2008) and China (see summarized data from Chen et al. 2010); S. undulatus setiger Fujita & Fujikawa, 1986 was collected from shady place, covered with bamboo-grass, and fern in mixed forest of Naroyo, Japan (Fujita & Fujikawa 1986); S. yakuensis Aoki, 2006 was described from Shiratani Unsui Valley, Yaki Island, the Okinawa Islands, Japan without information on sample type (Aoki 2006). ...
... The species S. breviseta (Balogh, 1986) was described from Bogota, Columbia without information on sample type (Balogh 1986); S. dubius Hammer, 1979 was collected from ferns, liverworts, Selaginella, mosses on branches and roots, different small plants and dead leaves on mountain slope with scattered, tall trees and shrubs in the Selecta Park, Java (Hammer 1979); S. elevatus Mahunka, 1987 was found in dry and decaying leaf litter in forests of Sepilok, Borneo (Mahunka 1987); S. foveolatus Luxton, 1988 was recorded from wet moss beneath beech in Canaan Road, Takaka Hill, Nelson, New Zealand (Luxton 1988); S. franzi (Balogh, 1986) was described from soil in Cuesta la Starria, Chile (Balogh 1986); S. granulatus (Balogh & Mahunka, 1969) was collected from decaying leaves interwoven with hyphae in forest about 20 km from Manaus, Brazil (Balogh & Mahunka 1969), also known from Paraguay without information on sample type (Balogh & Mahunka 1981) and different Brazilian localities (see summarized data from Oliveira et al. 2017); S. longisetus (Balogh, 1986) was reported from litter or rain forest in eastern Cordilles at Monterredondo, Colombia (Balogh 1986); S. makarchevae Sitnikova, 1975 was found from litter and dust of stub of forest in Primorsky Kray, Russia (Sitnikova 1975a); S. subniger (Ewing, 1917) was collected from ground under old pieces of forest in Iowa, U.S.A. (Ewing 1917); S. tohokuensis Fujikawa, 2003 was described from lichens and misses on the trunks of living beech trees in Nippon, Japan (Fujikawa 2003); S. undulatus undulatus Aoki, 1965 was reported from Sado Island, Japan without information on sample type (Aoki 1965), some localities in Japan (e.g. Aoki et al. 2004;Harada et al. 2008) and China (see summarized data from Chen et al. 2010); S. undulatus setiger Fujita & Fujikawa, 1986 was collected from shady place, covered with bamboo-grass, and fern in mixed forest of Naroyo, Japan (Fujita & Fujikawa 1986); S. yakuensis Aoki, 2006 was described from Shiratani Unsui Valley, Yaki Island, the Okinawa Islands, Japan without information on sample type (Aoki 2006). ...
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The oribatid mite genus Sadocepheus Aoki, 1965 is recorded for the first time from the Philippines; one new species is described from the leaf litter of secondary forest in Mindanao Island. Sadocepheus donvictorianoensis Ermilov & Corpuz-Raros sp. nov. differs from the most similar species, S. elevatus Mahunka, 1987 by the larger body size, long medial and short lateral teeth of the lamellae and shorter adanal setae. Revised generic diagnosis and the data on distribution and ecology of Sadocepheus species are presented.
... We follow Shaldybina (1975a) on the diagnosis of Melanozetes, which we enrich with data of Pavlichenko (1994) and our own observations. Subías (2015) listed 21 species and two subspecies of Melanozetes, but M. montanus (Fujikawa, 2003) and M. exobothridialis Bayartogtokh, 1998 were omitted, although they have 14 pairs of notogastral setae in the adult, including c 2 and c 3 , and Ghilarovizetes africanus Mahunka, 1984 was classified incorrectly in Melanozetes because it has 15 pairs of notogastral setae, including all setae of c-series and should be classified in Ghilarovizetes Shaldybina, 1969. Many species of Melanozetes were described imprecisely and need revision, like nine species described by Schweizer (1956) as nymphs. ...
... In the nymphs and adults of M. azoricus and M. mollicomus investigated here, solenidion ω 2 is longer than ω 1 and is located anterolateral to ω 1 , whereas in those of F. setosus, solenidion ω 2 is shorter than ω 1 and is placed posterolateral to ω 1 . Similar location of solenidion ω 2 as in M. azoricus and M. mollicomus was observed in adults of Melanozetes and Ghilarovizetes in which tarsus was investigated, namely M. sellnicki and G. longisetosus studied by Behan-Pelletier (1985), M. meridianus and M. tanana investigated by Behan-Pelletier (1986), M. crossleyi described by Behan-Pelletier (2000) and in M. montanus described by Fujikawa (2003). The exception is the adult of M. altaicus described by Shaldybina (1969), in which solenidion ω 2 on figure of tarsus I takes a strange position, posterior to solenidion ω 1 , which is not observed in either Melanozetes or Fuscozetes. ...
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In this study the morphological ontogeny of Melanozetes azoricus Weigmann, 1976 is described and illustrated for the first time and compared with that of other species of Melanozetes Hull, 1916. The juveniles of M. azoricus have a humeral organ and a humeral macrosclerite, with seta c1, that is typical of Melanozetes, and all juvenile stages and adult have broad leg femora, with large ventral carina, which often occur in Melanozetes. The juveniles of M. azoricus differ from those of other species by the shape of most gastronotal setae, whereas the adult differs mainly by the body size, shape of lamellar cusp, presence and shape of the translamella and shape of notogastral setae. The diagnosis of Melanozetes is unclear in literature, but we follow the setal diagnostic character of Melanozetes (14 pairs, including c2 and c3) that is supported by the size of humeral macrosclerite in the juveniles, with seta c1, and the length and location of solenidion 2 on tarsus I of nymphs and adults; this solenidion is longer than 1 and is located anterolateral to 1. In Fuscozetes Sellnick, 1928, which is sometimes mistaken with Melanozetes, solenidion 2 is shorter than 1 and is placed posterolateral to 1. A revised diagnosis of Melanozetes is proposed, systematic status of some species of Melanozetes is discussed and M. azoricus floresianus is proposed as a synonym of M. azoricus.
... The sex ratio of M. meridianus was 1:0.8, and 64% of females were gravid, usually carrying two large eggs (215 x 132 each), comprising 37% of total body length of females. Seniczak et al. (2023) compared chosen morphological characters of adults of Melanozetes species, from which the largest is M. avachai (see Seniczak et al. 2016b), and smallest is M. montanus (Fujikawa, 2003). The body size of European M. meridianus is similar to that of M. stagnatilis and M. exobothridialis Bayartogtokh et Aoki, 1998, but general morphology is also similar to that of M. mollicomus, except for slightly larger and stockier body, and absence of deep, rounded individual depressions at notogastral and adanal setae, which in M. mollicomus are present. ...
Article
The morphological ontogeny of Melanozetes meridianus Sellnick, 1928 is redescribed and illustrated. The juveniles of this species are light brown with brown prodorsum, gastronotum, sclerites and legs, and the nymphs have a well-developed lamella. In all juveniles, a humeral organ and humeral macrosclerite are present, seta c1 is inserted on humeral macrosclerite, and setae c2 and c3 are inserted on unsclerotized integument. The gastronotal shield of the larva has seven pairs of setae (d-, l-series and h1), while that of the nymphs has 10 pairs (d-, l-, h-series and p1), and setae p2 and p3 are inserted on a large posteroventral macrosclerite. In all instars the legs are stocky, all femora are flattened, and femora I and II have a large ventral carina.
... Remarks. The characters of the present material correspond well with those of the Asian and European materials studied by Fujikawa (2003) and Weigmann (2012). Measurements. ...
Article
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This work deals with 13 species of oribatid mites from different regions of Korea. Two new species, Humerobates aokii sp. nov. and Humerobates ulleungdoensis sp. nov. are proposed, and 11 known species, Punctoribates ezoensis (Fujikawa, 1982), Tectoribates proximus (Berlese, 1910), Protoribates tohokuensis Fujikawa, 2003, Protoribates capucinus Berlese, 1908, Peloribates pilosus Hammer, 1952, Scheloribates fimbriatus Thor, 1930, Neoribates aurantiacus (Oudemans, 1914), Zygoribatula glabra (Michael, 1890), Pergalumna myrmophila (Berlese, 1914), Trichogalumna boninensis Hagino, Bayartogtokh & Shimano, 2017, and Trichogalumna ohkuboi Hagino, Bayartogtokh & Shimano, 2017 are newly reported for the fauna of Korea. Supplementary descriptions and illustrations of each species along with their distributional data are provided.
... The description of F. floridae is imprecise, with no figure, so we agree with Subías (2004Subías ( , updated 2021 decision. However, we disagree with his classification of Melanozetes montanus (Fujikawa, 2003) in Fuscozetes because the adult has 14 pairs of notogastral setae, including c 2 and c 3 , and has solenidion ω 2 located anterolateral to ω 1 , which is typical of Melanozetes (Seniczak 1989a;Seniczak et al. 2015Seniczak et al. , 2016c). ...
Article
The systematic position of Fuscozetes setiger (Trägårdh, 1910) n. comb. is investigated in the light of ontogenetic studies. This species is classified by most authors as Trichoribates Berlese, 1910, but this classification is not supported by the morphology of juvenile stages of this species. In all juveniles of F. setiger, a humeral organ is present, and all nymphs have a humeral sclerite, which is typical of Fuscozetes Sellnick, 1928. The larva has a pygidial sclerite, with three pairs of setae (dp, lp, h1), the nymphs have a gastronotal sclerite, with 10 pairs of setae (d-, l-, h-series and p1), and setae p2 and p3 are inserted on unsclerotized integument. The nymphs have a large humeral sclerite, bearing seta c1, while setae c2 and c3 are inserted on unsclerotized integument. The adult of F. setiger has thin seta l" on genu and tibia I and II, which is typical of Fuscozetes.
... Subías (2020) listed 15 species of Fuscozetes, one of which he considered species inquirenda. In our opinion, Melanozetes montanus (Fujikawa 2003) is wrongly included in Fuscozetes because it has 14 pairs of notogastral setae, including c 2 and c 3 , and solenidion ω 2 is located anterolateral to ω 1 , which is typical of Melanozetes (Seniczak et al. 2015(Seniczak et al. , 2016bSeniczak & Seniczak 2018). ...
Article
The morphological ontogeny of Fuscozetes coulsoni sp. nov. from the High Arctic archipelago of Svalbard (Norway) is described and illustrated. The adult of this species has medium sized translamella, similar to F. kamchatkicus Seniczak et al. 2016a and F. pini Dalenius, 1963, but in F. coulsoni, the lamellar cusp is clearly wider than in other species. The larva of F. coulsoni has a pygidial sclerite, which is unique to Fuscozetes Sellnick, 1928, in other species from this genus the gastronotal shield is uniform, divided in parts, or absent. The juveniles of F. coulsoni and F. kamchatkicus have several similar morphological characters which are rare in Fuscozetes (clavate bothridial seta, dark pigmented sclerite around opisthonotal gland opening, absence of microsclerites at some hysterosomal setae and humeral organ and humeral sclerite in larva), but which are common in Trichoribates Berlese, 1910, except for a humeral sclerite with seta c1 in nymphs, which is present in Fuscozetes and absent in Trichoribates.
... We follow the diagnosis of Fuscozetes given by Seniczak et al. (1990). Subías (2015) listed 13 species of Fuscozetes, but Melanozetes montanus (Fujikawa, 2003) was wrongly included by both authors in Fuscozetes. This species has 14 pairs of notogastral setae, including c 2 and c 3 , and should be classified in Melanozetes Hull, 1916; it also has solenidion ω 2 located anterolateral to ω 1 , which is typical of this genus (Seniczak et al. 2015(Seniczak et al. , 2016c. ...
Article
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A new species, Fuscozetes kamchatkicus sp. nov., including its morphological ontogeny, from Kamchatka Peninsula (Russia) is described and illustrated. The adult of this species is smaller and slimmer than congeners and has longer prodorsal seta le than in; in other species in is longer than le. In F. kamchatkicus the shape of the translamella varies (usually is present, but may be narrow as a line or absent), while in other species the translamella is present. The juveniles of F. kamchatkicus differ from congeners by several morphological characters that are unique in Fuscozetes Sellnick, 1928, e.g. they lack a humeral organ, which is present in other species. The larva lacks a humeral macrosclerite, whereas other species have it. In F. kamchatkicus the gastronotal setae are inserted on unsclerotized integument, whereas in other species they are inserted either on the gastronotal shield or microslerites. The nymphs of F. kamchatkicus have a humeral macrosclerite and a gastronotal shield, which is typical of Fuscozetes and Sphaerozetinae (Ceratozetidae), but the humeral macrosclerite bears seta c1, while setae c2 and c3 are inserted on unsclerotized integument, whereas in other species the humeral macrosclerite is glabrous and setae c2 and c3 are inserted on microsclerites. In F. kamchatkicus setae p2 and p3 are inserted on unsclerotized integument, whereas in other species they are inserted on a macrosclerite. In the juveniles of F. kamchatkicus most gastronotal setae are barbed, except of the d-series in the nymphs, which are thinner than other gastronotal setae and smooth. The diagnosis of Fuscozetes is modified and enlarged with the morphological characters of juveniles.
... NEW LOCALITY: Japan, Aomori Prefecture, Shirakami-sanchi World Heritage Area, surface layer of forest floor (620 m above sea), 3 X 1999, leg M. SATO, Y NAKAMURA and T. FUJIKAWA. 12 specimens (FUJIKAWA 2003). ...
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A supplement to the monograph on ptyctimous mites of Oriental Region (NIEDBA£A 2000), presents diagnoses of the species described in the papers published after 1998 and a few species described in the papers published before this year. Analysis of a few dozen samples with ptyctimous mites from different areas of Oriental Region has enriched the number of species from the region by 7 species new to science. These new species are: Mesoplophora (Mesoplophora) frogneri n. sp., Apoplophora kapiti n. sp., Apoplophora sarawaki n. sp., Apoplophora serrata n. sp., Apoplophora triquetra n. sp., Austrotritia singaporensis n. sp., and Phthiracarus pondoklowii n. sp. The species Euphthiracarus meghalayensis SANYAL, 1988 has been declared conspecific with Euphthiracarus pakistanensis HAMMER, 1977 and Pthiracarus (Archiphthiracarus) hirsutus FUJIKAWA, 2003 with Phthiracarus setosus (BANKS, 1895). From among the 39 already known species, 12 were known only from the original description and these have been subjected to detailed morphological analysis revealing or allowing more accurate specification of some morphological features, included in the redescriptions presented in this paper. New localities have been specified for the following species: O. chichijimensis, E. meghalayensis, P. globosus, and A.(A.) clavatus, extending their hitherto geographical ranges. In total the supplement presents 45 species, including 8 Mesoplophoridae, 16 Euphthiracaroidea, and 21 Phthiracaroidea.
... Femora of legs II–IV with ventral blade (Fig. 10B). Distribution and ecology: Originally described from Japan, found in litter layer of old beech forest (Fujikawa 2003). Portuguese findings in soil surface layer of a river floodplain Alnus forest, South-West Algarve, are the second ones, as far as known by the author. ...
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Four new species of Oribatida were found in soils of different coastal habitats in South Portugal. Scheloribates litoralis sp. n. is the first halophilous species of the subgenus Scheloribates (Scheloribates), living in the upper salt marsh zone in the estuary of Ribeiro de Aljezur (Western Algarve) and also in the Lagoon of Aveiro (North Portugal). All other described and redescribed species occur mainly in coastal bush-land in the estuary region of the Ribeira de Aljezur (Western Algarve): Scheloribates ibericus sp. n. and the similar S. minifimbriatus Mínguez, Subías & Ruiz, 1986 (Scheloribatidae), Haplozetes differens sp. n., H. similis (Gil & Subías, 1995), Pilobates carpetanus Pérez-Iñigo, 1969 (Haplozetidae) and Coronoquadroppia guttata sp. n. (Quadroppiidae). Taxonomical and systematical discussions are presented on all species and on the genus Haplozetes.
... The diagnoses of most species of Umbellozetes are rather brief (Zlotin and Krivolutskiy, 1969;Golosova and Karppinen, 1984;Shen et al., 1999), except for the more detailed description of U. parvus by Fujikawa (2003), and all are based only on the morphology of adults. All species have similar body shape and well developed lamellae that are fused medially (which is typical of this genus), and 10 pairs of notogastral setae. ...
Article
On the basis of adult morphology the oribatid mite genus Umbellozetes has been included in the family Tegoribatidae (Achipterioidea) since its original description. Juveniles of this family and other Achipterioidea have plicate cuticle and lack a humeral organ, but the ontogeny of Umbellozetes has been unknown. Herein, we use specimens of all instars to propose and describe Umbellozetes slaveki n. sp. from Central Mongolia. Juveniles of U. slaveki have smooth cuticle, a humeral organ in nymphs, and a dark pigmented macrosclerite around the opisthonotal gland opening, all of which are typical traits of Ceratozetidae, rather than Tegoribatidae. The adult of U. slaveki lack also a posterior notogastral tectum and has long and thin solenidia on legs that is typical for Ceratozetidae. Based on these and other morphological characters, we propose and support the transfer of Umbellozetes to trichoribatinae Ceratozetidae.
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Two new suctobelbid mite species (Oribatida, Suctobelbidae), Suctobelbella (Flagrosuctobelba) crassise-tosa sp. nov. and Suctobelbila tetrasetosa sp. nov. are described based on adults collected from leaf litter in secondary semi-evergreen tropical forest in Mexico. Suctobelbella (F.) crassisetosa sp. nov. is similar to S. (F.) muronokiensis and S. (F.) plumosa in having thick notogastral setae and numerous lateral teeth on the rostrum, but differs from both by the number of genital setae, and the morphology and length of some notogastral setae. Suctobelbila tetrasetosa sp. nov. is similar to S-bila dentata in having one pair of notogastral tubercles, three pairs of simple lateral teeth on the rostrum and short notogastral setae, but differs from the later by the number of genital setae and the presence of long notogastral cristae.
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Twenty-four new species of Eutegaeoidea from Australia and New Caledonia are described, and two new genera proposed. These are Eutegaeus woiwurrung sp. nov., E. nothofagi sp. nov., E. bidhawal sp. nov., E. ptilosus sp. nov., Humerotegaeus carinatus gen. et sp. nov., H. concentricus gen. et sp. nov., Atalotegaeus crobylus sp. nov., Neoeutegaeus torsteini sp. nov., N. melipsilon sp. nov. N. malcolmi sp. nov., N. corniculatus sp. nov. (Eutegaeidae), Compactozetes goongerah sp. nov., C. crenellatus sp. nov. (Compactozetidae) and Pterozetes lawrencei sp. nov. (Pterozetidae) from temperate rainforests in Victoria and Tasmania; Compactozetes bundjalung sp. nov., C. calderi sp. nov., C. duonodulus sp. nov., Sadocepheus remus sp. nov. (Compactozetidae) and Porrhotegaeus githabul sp. nov. (Porrhotegaeidae fam. nov.) from temperate and sub-tropical rainforests of the Great Dividing Range in central and northern New South Wales and southern Queensland, Porrhotegaeus catherinae sp. nov. from scalybark closed forest on Lord Howe Island, Eutegaeus odontatus sp. nov. and Compactozetes pirumorpha sp. nov. from moist upland forest on Norfolk Island and Neseutegaeus wardi sp. nov. and Atalotegaeus deficiens sp. nov. from tropical rainforest and moss forest in New Caledonia. Based on the predominantly Southern Hemisphere distribution of Eutegaeoidea, indicating strong Gondwanan affinities, and the morphology of adults and immatures, this taxon is treated as distinct from the Cepheoidea which has a distribution almost entirely within the Northern Hemisphere. Eutegaeoid species previously described from Australia (Eutegaeus soror P. Balogh, 1985, Atalotegaeus mensarosi J. & P. Balogh, 1983, Neseutegaeus monteithi J. & P. Balogh, 1983, Neoeutegaeus phyllophorus J. & P. Balogh, 1983 and Porrhotegaeus ornatus J. Balogh & Mahunka, 1966) are redescribed based on type material and new distribution records provided. Species have distribution patterns predominantly indicative of short-range endemics associated with remnant Gondwanan rainforest. Neseutegaeus monteithi is recombined to Atalotegaeus Luxton, 1988a. Definitions of genera and families of Eutegaeoidea are revised and their relationships reconsidered. Birotegaeus Luxton, 1988a and Pareutegaeus Woolley, 1965 are designated junior synonyms of Eutegaeus Berlese, 1916. Immatures are described for the genera Atalotegaeus, Eutegaeus, Neoeutegaeus Aoki, 1964 and Porrhotegaeus J. Balogh & Mahunka, 1966. Neoeutegaeidae fam nov. is established for Neoeutegaeus Aoki, 1964 and Humerotegaeus gen. nov., Porrhotegaeidae fam. nov. for Porrhotegaeus and Bornebuschiidae fam. nov. for Bornebuschia Hammer, 1966 and Dicrotegaeus Luxton, 1988 which had previously been placed in Cerocepheidae or Compactozetidae. Eutegaeus aysenensis Ermilov, 2021 and E. queulatensis Ermilov, 2021 from Chile are recombined to Atalotegaeus. A key is provided to the genera of the eight families of Eutegaeoidea, as recognised herein: Eutegaeidae, Neoeutegaeidae fam nov., Cerocepheidae, Compactozetidae, Bornebuschiidae fam. nov., Pterozetidae and Porrhotegaeidae fam. nov.
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In this study, the investigation on oribatid fauna of agricultural region is carried out for the first time in Yangchun City, Guangdong Province, southeast China. A list of identified taxa, including 19 species from 18 genera and 15 families, is presented. Of these, one species, Dolicheremaeus variolobatus Hammer, 1981, is recorded in China for the first time. 13 species are newly recorded in Guangdong Province. A new species, Unguizetes yangchunensis sp. nov., is described. In addition, an updated key to all known species of Unguizetes is provided.
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A new species of oribatid mites of the family Cepheidae is described based on adults from rainforest in Chile. Sadocepheus nortonroyi sp. nov. differs from Sadocepheus foveolatus by the larger body size, the presence of transverse notogastral ridge and divergent lamellar cusps, and the location of notogastral setae on the notogastral surface. Explanations on placement of some species in Sadocepheus are presented. An identification key to known species of Sadocepheus is given.
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Diagnoses are given and relationships discussed for two new oribatid mite genera (Helvetobelba gen. n. and Unicobelba gen. n.) from Switzerland. Two new species, Helvetobelba dichotoma and Unicobelba ypsilonsignata are described and one new combination, Unicobelba truncicola (Forsslund, 1941) is suggested.
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