Pairs Of Setae Research Articles

Description of Ornithodoros (Pavlovskyella) tartakovskyi using scanning electron microscopy, with notes on the morphology of Pavlovskyella sensu stricto and Theriodoros subgenera

Accumulation of DNA sequence data and its use in systematics of the family Argasidae reveals new incongruencies between genera and subgenera, since several groups defined by classical taxonomy appear to be paraphyletic, which is the case of the subgenus Pavlovskyella. In order to identify morphological characters unique to one of the monophyletic groupings within Pavlovskyella and improve its system, we describe all active stages of Ornithodoros (Pavlovskyella) tartakovskyi, a species with an incomplete original description. Larvae, nymphs, males and females from Iran were examined with scanning electron microscopy (SEM). The larva of O. (P.) tartakovskyi lacks dorsal plate, posteromedian seta, postcoxal setae and a spinose area in palpal article I; the dorsal surface has 13 pairs of setae and the hypostome has two short rows of denticles in the apex only. The first nymphal instar (N1) has a micromammillated body with faint dorsal and ventral disks. The second nymphal instar (N2) shows mammillated body with an incipient hood, and dorsal disks outlined as in subsequent instars. Both N1 and N2 have a small patch of glabrous surface in the anterior margin of preanal groove, absent in posterior stages. Third nymphal instar (N3) has a small hood and lack cheeks, which are incipient in the fourth nymphal instar (N4). The four nymphal instars (N1–N4) have blunt hypostomes, striated capitula, non-mammillated legs, and 3 humps on tarsi I. Females and males of O. (P.) tartakovskyi have mammillated bodies, small cheeks not covering the capitulum, the anteromedian disk is placed anteriorly to anterior central disks, and a posterior median file of disks is merged with the median disk. We describe all postembryonic stages of O. (P.) tartakovskyi providing morphological characters that define Pavlovskyella sensu stricto and Theriodoros, a sister subgenus that includes similarly shaped species.

Cerogamasus, a New Genus of Parasitinae Mites, with Description of Four New Species from China (Acari: Parasitiformes: Parasitidae).

The new genus, Cerogamasus gen. nov., with the type species Cerogamasus tibetensis sp. nov., is established. The new genus is easily distinguished from other genera of Parasitidae because the dorsal idiosoma in both sexes bears more than 40 pairs of setae, of which fewer than 7 pairs of podonotal setae are smooth; the seta z5 of the dorsal hexagon is similar to j5 and j6 in form (pilose or distally pilose) while different in length (z5 longer); the seta al of the palpfemur is pectinate, and al1 and al2 of the palpgenu are entire; the gnathotectum is trispinate; peritrematal shields in females are posteriorly free; and the palptrochanter in males has a pointed ventral protuberance. C. anhuiensis sp. nov., C. guizhouensis sp. nov. and C. multidentatus sp. nov. are described based on adult samples; C. tibetensis sp. nov. is described based on deutonymph and adult samples. Cycetogamasus coreanus Athias-Henriot, 1980, is transferred to Cerogamasus gen. nov. as a new combination.

Morphological ontogeny of Melanozetes meridianus(Acari, Oribatida, Ceratozetidae)

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.

Catalogue of Bracychthoniidae (Sarcoptiformes, Oribatida) specimens deposited in the State Museum of Natural History NASU, Lviv, Ukraine

Brachychthoniids are tiny mites, typically measuring less than 250 µm in length (Krant et al. 2009). Brachychthoniids can be distinguished from other oribatids by the fact that their notogaster is divided into 3 plates by 2 transverse furrows (Weigmann, 2006). The anteriormost plate has 6 pairs of setae (c and d rows) (Krant et al., 2009). Without extra cupules immediately lateral to mid-dorsal setae (Krant et al., 2009). The genital plates and the combined anal/peranal plates are of similar size (Krant et al., 2009). There is 1 pair of aggenital setae, 2 pairs of setae on the anal plates, and the peranal plates are present with 1 pair of setae (Krant et al., 2009). In terms of geography and ecology, brachychthoniids may be the most extensively spread family among oribatid mites (Krant et al., 2009). Besides being varied and plentiful in damp forest soil and litter, they are frequently found in disclimax communities and newly established habitats (Norton and Palmer, 1991). The world fauna of Brachythoniidae is represented by 163 species belonging to 12 genera (Subias, 2004). In Ukraine, 40 species of mites of this family, belonging to 9 genera. Thus, the species diversity in Ukraine is 25% of the world's fauna. The collection of oribatid mites of the State Museum of Natural History of the NAS of Ukraine contains 9 species of brachychthoniids, as follows: Liochthonius alpestris (Forsslund, 1958), L. hystricinus (Forsslund, 1942), L. muscorum Forsslund, 1964, L. brevis (Michael, 1888), L. sellnicki (Thor, 1930), Sellnickochthonius suecicus (Forsslund, 1942), S. zеlawaiensis (Sellnick, 1928), Eobrachychthonius oudemansi van der Hammen 1952 and Synchthonius crenulatus (Jacot, 1938). They have been collected in the western regions of Ukraine and are represented by 96 individuals, which make up 16 records. In particular, the collection contains samples collected from Zakarpatska, Lvivska and Ivano-Frankivska provinces. Some materials were collected in nature conservation areas: Nature Reserve Roztochchia, National Natural Park Synevyr and Carpathian Biosphere Reserve. This article was written with the support of the National Research Foundation of Ukraine, call 2022.01 «Science for the Recovery of Ukraine in the War and Post-War Periods» the project 2022.01/0013 «Digitization of natural history collections damaged as a result of hostilities and related factors: development of protocols and implementation on the basis of the State Museum of Natural History of the National Academy of Sciences of Ukraine». The contents of this article do not necessarily reflect the views of the National Research Foundation of Ukraine and are the sole responsibility of the State Museum of Natural History, NAS of Ukraine.

Morphological Ontogeny, Ecology, and Biogeography of Fuscozetes fuscipes (Acari, Oribatida, Ceratozetidae).

The systematic status of Fuscozetes Sellnick, 1928, is not clear in the literature. Therefore, the morphological ontogeny of F. fuscipes (C.L. Koch, 1844), the type species of this genus, was investigated and compared with its congeners in this study, and a new diagnosis of Fuscozetes is given. The juveniles of F. fuscipes are light brown, with a brown prodorsum, sclerites, epimeres, and legs. In all juveniles, a humeral organ and a humeral macrosclerite are present. The gastronotum of the larva has 12 pairs of setae (h3 is present), whereas the nymphs have 15 pairs. In the larva, the gastronotal shield is weakly developed, and most gastronotal setae are short except for a slightly longer h2. Most of the gastronotal setae are inserted on the microsclerites except for h3, and several other macrosclerites and many microsclerites are present on the hysterosoma. In the nymphs, the gastronotal shield is well developed, with 10 pairs of setae (d-, l-, and h-series, and p1), and setae p2 and p3 are located on a large posteroventral macrosclerite. In all the instars, femora I and II are oval in cross-section, without a large ventral carina. Mitochondrial COI sequence data revealed a deep split between the Nearctic and Palearctic populations of F. fuscipes, and a less, but significant, divergence within each continent. These strong geographical barriers were contrasted with multiple cases of shared haplotypes over long distances in the Palearctic, indicating high migration rates in modern times.

A checklist and a key to Typhlodromus Scheuten of Syria (Acari: Phytoseiidae), with a new species record

This study presents a checklist and a key encompassing 11 species of Typhlodromus Scheuten (Acari: Phytoseiidae) from Syria, derived from materials collected in this study as well as previous reports. A brief redescription, including setal measurements and some other important characters used to discriminate phytoseiid species, is provided for each species examined. Notably, the species Typhlodromus (Anthoseius) intercalaris Livshitz & Kuznetsov is reported for the first time in Syria, and redescribed based on adult specimens collected from Quercus cerris L. and Quercus infectoria G. Olivier (Fagaceae) trees in Latakia governorate. The examined specimens of this species demonstrated variation in the presence or absence of preanal pores: (1) absent on both sides; (2) present on both sides; (3) present on the left side; and (4) present on the right side. This species was considered a junior synonym of T. (A.) invectus Chant in an earlier study without examination of their type materials. We tried to find the holotype T. (A.) invectus without success. However, according to their original description, T. (A.) intercalaris is distinguishable from T. (A.) invectus by having two pairs of setae on the sternal shield, as opposed to three pairs in the latter species. Therefore, the reason for the redescription provided here is to improve diagnosis and minimize any confusion regarding the species status of the Syrian specimens. This discovery holds significant implications for understanding the biodiversity of phytoseiids in the country.

Morphological ontogeny of Melanozetes interruptus Zacher</p > (Acari, Oribatida, Ceratozetidae), and comments on Melanozetes Hull

The morphological ontogeny of Melanozetes interruptus Willmann, 1953 is redescribed and illustrated. The juveniles of this species are brown with dark-brown sclerites. In juveniles humeral organ and humeral macrosclerite are present, seta c1 is inserted on humeral macrosclerite, and setae c2 and c3 are inserted on microsclerites. In the larva, the gastronotal shield has seven pairs of setae (d-, l-series and h1), in the nymphs it has nine pairs (d-, l-, h-series), whereas all setae of p-series are inserted on microsclerites, which is unique in Melanozetes Hull, 1916. In most nymphs of this genus seta p1 is inserted on gastronotal shield. In the juveniles and adult the legs are stocky, all femora are flattened, and femora I and II have a large ventral carina. Solenidion ω2 on tarsus I is located anterior to solenidion ω1 and is longer than ω1. In this species tarsal setae a are clearly longer than seta s.

Tenuipalpus Sensu Lato Donnadieu (Acari: Prostigmata: Tenuipalpidae); New Species Groups, a New Species, and Keys to the World Species.

Four new species groups of the Tenuipalpus sensu lato group are proposed in the present study based on the total number of dorsal opisthosomal setae, namely, carolinensis with ten pairs of setae (214 species), dubinini with nine pairs of setae (33 species), granati with eight pairs of setae (29 species), and barticanus with seven pairs of setae (7 species) Additionally, diagnostic keys to species groups and 273 species of the Tenuipalpus sensu lato are provided. Three species, T. lustrabilis Chaudhri, T. guptai Sadana and Gupta, and T. solanensis Sadana and Gupta, are synonymized with T. punicae Pritchard and Baker. One species, T. rodionovi Chalilova, is suggested as a junior synonym of T. granati Sayed, and eight species, T. chiococcae De Leon, T. costarricensis Salas and Ochoa, T. ephedrae Livschitz and Mitrofanov, T. molinai Evans, T. santae Manson, T. simplychus Cromroy, T. tetrazygiae De Leon, and T. oxalis (Flechtmann), belonging to the carolinensis species group, are not included in the key. Furthermore, a new species of Tenuipalpus sensu lato, T. jazanensis sp. nov., is described and illustrated based on females collected from the Chamaerops spp. (Arecaceae).

Rhinonyssus nenecoi sp. nov. (Mesostigmata: Rhinonyssidae); a new nasal mite from Daption capense (Procellariiformes: Procellariidae).

Parasitic nasal mites have been surveyed in a range of vertebrate hosts, but only two species of Rhinonyssidae have been described from procellariiform seabirds. We here describe Rhinonyssus nenecoi sp. nov., from Cape petrels, Daption capense (Procellariidae), collected in Rio Grande do Sul State, southern Brazil. The new species is morphologically most similar to R. procellaricus and R. pluvialis differing mainly by a strongly sclerotised podosomal shield with four pairs of setae, covering more than half of the idiosoma; a podosomal shield with a V-shaped posteromedial projection; an irregularly-shaped sternal shield; and a ventral opisthosoma with 3-4 pairs of setae.

Morphological ontogeny of Pilogalumna ayildizi sp. nov. (Acari, Oribatida, Galumnidae), a new cryptic species from Turkey

The morphological ontogeny of Pilogalumna ayildizi sp. nov. is described and illustrated. This species is similar to P. tenuiclava (Berlese, 1908) as adult, but differs from it clearly by the morphology of juvenile stages and ecology. The larva of P. ayildizi has 12 pairs of gastronotal setae, most are short and smooth except for slightly longer dp and medium-sized c-series, h1 and h2, and minute h3, and the nymphs have 15 pairs of these setae, most are short and smooth except for medium-sized and barbed c-series. The gastronotal shield of juveniles is poorly developed with setae of d-, l-series and h1 in the larva, and d-, l-, h-series and p1 in the nymphs. In the juveniles setae of c-series, p2 and p3 have basal microsclerites, and a humeral organ is present.

Two new species of Coccophagus Westwood (Hymenoptera: Aphelinidae) from China

The malthusi group of Coccophagus Westwood (Hymenoptera: Aphelinidae) is characterized by a densely setose mesoscutellum with the posterior apical pair of setae distinctly longer than others. In the present paper, two new species of the malthusi group are described from China: Coccophagus infuscatus sp. nov. and Coccophagus bandus sp. nov., both reared from species of Coccidae (Hemiptera: Sternorrhyncha). The type specimens are housed in Institute of Zoology, Chinese Academy of Sciences (IZCAS), Beijing, China.

A new species of Typhlodromus (Typhlodromus) Scheuten (Acari: Phytoseiidae) from Turkey, with a key to the Turkish species of the subgenus

Typhlodromus (Typhlodromus) tulinae sp. nov. Döker is described based on specimens collected from Carpinus betulus L. (Betulaceae) in Ordu Province on the Black Sea coast, Turkey. The new species can be easily distinguished from all known species of the subgenus by the combination of the following morphological characters: dorsal shield with three pairs of solenostomes (gland pores), peritreme extending to region between j3 and z2, sternal shield with two pairs of setae, ventrianal shield with four pairs of preanal setae and no preanal solenostomes, movable digit of chelicera with two teeth, genu II with eight setae, and spermatheca with large bulbous atrium and saccular calyx. A key to separate the Turkish species of the subgenus is also provided.

A new genus and three new species of mites, with a revised concept of the family Ameroseiidae (Acari: Mesostigmata: Ascoidea)

This paper describes a new genus and three new species of mites found in litter and soil samples from Brazil and Egypt. Endopodoseius Abo-Shnaf & Moraes n. gen., Endopodoseius erikae Abo-Shnaf & Marticorena n. sp., Endopodoseius zaheri Abo-Shnaf & Moraes n. sp. and Endopodoseius edmilsoni Abo-Shnaf & Castilho n. sp. are considered to belong to the Superfamily Ascoidea and the Family Ameroseiidae. The concept of the family is expanded to include species with one or more of the following character states-the podonotal and opisthonotal shields partially or totally separate; poroid iv1 absent; dorsal idiosomal setae J1, J5 and R1 present; genital seta st5 inserted outside the epigynal shield; opisthogaster with 7-10 pairs of setae; and femur II with 11 setae.

Two new mite species of the genus Geckobia Mégnin (Acariformes: Pterygosomatidae) from Israel

Two new species of pterygosomatid mites parasitizing Sinai fan-fingered gecko Ptyodactylus guttatus Heyden (Phyllodactylidae) from Israel are described: Geckobia bochkovi sp. nov. and Geckobia synthesys sp. nov. The former species is the most similar to Geckobia squameum Bertrand, Paperna, and Finkelman, 1999, but differs by the presence of a well-outlined, slightly concave propodonotal shield in its anterior and posterior margin, fine-pointed dorsal setae that slightly increase in length from the anterior to the posterior part of the idiosoma, leg setae l'FI and l'GI, shape of coxal setae 4a, 4b and 4c which are slender and smooth or with barely discernible serration. The latter species is most similar to Geckobia keegani Lawrence, 1953 but differs in the shape of the propodonotal shield, which is almost straight in its posterior margin, the presence of five pairs of setae on the shield, 19-28 pairs of idiosomal ventral setae, three genital setae and leg setae l'GI, l'GIV, vFI-II, vFIII-IV, lFIII-IV and vTrIV.

A new species of Blattisocius (Acari: Mesostigmata: Blattisociidae) from China, with a key to species of the genus recorded from that country

ABSTRACT We describe a new species, Blattisocius trifuricpilus sp. nov., collected from polypore fungi on dead trees from Mengla County, Xishuangbanna, Yunnan Province, China. The new species can be distinguished from other species of the genus by the presence of 36 pairs of setae on the dorsal shield, of which 20 pairs of setae (j1, j3, z3, z4, z6, s3-s6, r3, Z1-Z5, S1-S5) are relatively stout and trifurcate, opisthogastric setae JV5 relatively stout and trifurcate, and the peritreme reaching anteriorly to level of j2. A key is presented to the seven recognizable Chinese species of the genus Blattisocius. http://www.zoobank.org/urn:lsid:zoobank.org:pub:EB8FEC91-7831-4BF0-B13F-88964F795B31

Two cases of structural anomalies on dorsal podosomal shields in Raphignathus gracilis (Rack) (Acariformes: Raphignathidae)

Raphignathus gracilis (Rack, 1962) (Raphignathidae) is a widely distributed species and has been recorded from many countries including Turkey (Koç & Ayyıldız 1996; Doğan 2003, 2019; Beron 2020; Mohammad-Doustaresharaf & Kazemi 2022). It can be recognized by having 2 setae on palp femur, 2 pairs of setae on interscutal membrane of idiosoma, no obvious small platelets posteriad of median podosomal shield, 3 pairs of genital setae and 3 setae on femur IV in female (Fan & Yin 2000; Doğan et al. 2019).

Eukoenenia mocororo (Palpigradi: Eukoeneniidae): a new troglobitic palpigrade from a Brazilian ferruginous cave.

A new troglobitic palpigrade from Southeastern Brazil is described based on nine specimens (including males, females and immatures of all stages) collected in an iron ore cave named "Mocororô". The most peculiar trait of Eukoenenia mocororo sp. nov. that readily distinguishes it from other Eukoenenia species described worldwide is the presence of fourteen pairs of setae (including the fusules) on first lobe of male genitalia. Although other palpigrades have been reported from Brazilian iron ore caves, this record is remarkable because Mocororô cave is inserted in Peixe Bravo River Valley (Northern Minas Gerais state)-a ferruginous system with dozens of caves that have been targeted for biospeleological studies only a few times. Therefore, the description of this new species, besides contributing to the conservation of Mocororô cave, constitutes an example of the high potential for discoveries in this region.

Morphological ontogeny of Hermanniella septentrionalis (Acari, Oribatida, Hermanniellidae) and comments on Hermanniella Berlese

The morphological ontogeny of Pilogalumna tenuiclava (Berlese, 1908) is redescribed and illustrated. The prodorsal setae of juveniles are of medium size or long and barbed, and bothridial seta is fusiform, with thick, barbed head. Larva has 11 pairs of gastronotal setae, including h2, most are short and smooth, except for longer and barbed c2, c3, dp, h1 and h2. The nymphs have 15 pairs of these setae, most are short and smooth, except for longer and barbed c3. Gastronotal shield of juveniles is poorly developed, with setae of d-, l-series, and h1 in the larva, and d-, l-, h-series and p1 in the nymphs, setae of c-series, p2 and p3 are inserted on unsclerotized integument. In all juveniles, a humeral organ is present.

Morphological ontogeny of Pilogalumna tenuiclava (Acari, Oribatida, Galumnidae) and comments on Pilogalumna Grandjean

The morphological ontogeny of Pilogalumna tenuiclava (Berlese, 1908) is redescribed and illustrated. The prodorsal setae of juveniles are of medium size or long and barbed, and bothridial seta is fusiform, with thick, barbed head. Larva has 11 pairs of gastronotal setae, including h2, most are short and smooth, except for longer and barbed c2, c3, dp, h1 and h2. The nymphs have 15 pairs of these setae, most are short and smooth, except for longer and barbed c3. Gastronotal shield of juveniles is poorly developed, with setae of d-, l-series, and h1 in the larva, and d-, l-, h-series and p1 in the nymphs, setae of c-series, p2 and p3 are inserted on unsclerotized integument. In all juveniles, a humeral organ is present.

Four new species of Arrenurus water mites (Acari, Hydrachnidiae, Arrenuridae) from China

ABSTRACT The paper deals with four new species of Arrenurus (Acari, Hydrachnidiae, Arrenuridae) from standing water habitats in China: Arrenurus (Arrenurus) pseudonemani sp. nov., Arrenurus (Arrenurus) circinatus sp. nov., Arrenurus (Arrenurus) menglaensis sp. nov., and Arrenurus (Megaluracarus) guantingensis sp. nov. Arrenurus (Arrenurus) pseudonemani sp. nov. can be distinguished by the petiole membrane enlarged in the middle, making the middle part significantly wider than the front and rear ends. Arrenurus (Arrenurus) circinatus sp. nov. can be distinguished by petiole bearing a circular petiole membrane at the end. Arrenurus (Arrenurus) menglaensis sp. nov. can be distinguished by petiole with a pair of setae and split down the middle, forming a pair of pointed crescents at the ends. Arrenurus (Megaluracarus) guantingensis sp. nov. can be distinguished cauda slightly convex basally, without lateral extensions, P-2 with 15 small medial setae near distoventral corner. All the type specimens are deposited in GUGC. http://www.zoobank.org/urn:lsid:zoobank.org:act:22E84E7B-2E0A-4E82-8ED4-A617139A4CE0