Two new genera, Crassoseta and Brachysternopsis, of the family Diplogyniidae (Acari, Mesostigmata, Trigynaspida)

The genus Crassoseta is erected for three new species of diplogyniid mites taken from passalid beetles collected in Mexico, Brazil and Costa Rica; Brachysternum cornutum Hyatt, 1964 is transferred to this genus and a key to species is given. Brachysternopsk gen.n. is established for B. flechtmanni gen. et sp.n. taken from an ant, Atrica capiguara. in Brazil.     

Biogeographic distribution of the Phytoseiidae (Acari: Mesostigmata)

More than 1982 species in 90 genera were included in an analysis of the biogeography of the Phytoseiidae, a family of predatory mites. Seven biogeographic regions were taken into account: Nearctic, Neotropical, Ethiopian, West Palaearctic, East Palaearctic, Oriental, and Australasian. The number of species was particularly high in the Neotropical, Oriental, and West Palaearctic regions. These regions also present the highest levels of species endemism. The number of genera was quite similar in all regions except for the Neotropics, which also had a high level of endemism. The possible Gondwanian (Neotropical, Ethiopian, Australasian, and Oriental regions) origin of the Phytoseiidae, most probably in the Neotropics, and their possible radiation to Laurasia (Nearctic, West Palaearctic, and East Palaearctic regions) are discussed. The comparison between genera and species in the different biogeographic regions indicate the importance of both dispersal and vicariance events in the evolution of the group. Dispersal is assumed to have been most important between Neotropical and Nearctic regions and between East Palaearctic and Oriental regions, whereas vicariance could have been the dominating process between Australasian, Ethiopian, and Oriental regions, as well as between West and East Palaearctic regions. A parsimony analysis of endemicity showed the Neotropical and the Nearctic regions to be isolated from the other regions. This is certainly due to a diversification after the continents drifted apart and then a high dispersal between Nearctic and Neotropical regions. Different phylogenetic hypotheses and scenarios are proposed for each subfamily based on the results obtained and further investigations are proposed.  © 2008 The Linnean Society of London, Biological Journal of the Linnean Society , 2008, 93 , 845–856.     

The biology and development of Hypoaspis (Pneumolaelaps) hyatti (Acari: Mesostigmata)

All the stages of Hypoaspis ( Pneumolaelaps ) hyatti Evans & Till are described and figured. The mites seem to feed on Tyrophagus laevis (Dujardin, 1849). The leg chaetotaxy and the development of the dorsal chaetotaxy are summarized. Egg lengths and female body lengths of several gamasids are compared.     

Idiosomal setae in the family Phytoseiidae (Acari: Mesostigmata): variation,geographical distribution and taxonomic considerations

Phytoseiidae classification is based on idiosoma chaetotaxy and the assumed evolutionary process is seta suppression. This article aims to determine how depilation could have taken place depending on seta position, subfamily and region. For this, the occurrence of 21 variable setae on dorsal and ventral shields was determined for 1996 species in seven biogeographical regions. The occurrence of eight rare setae assumed to be past relics and 11 rarely absent setae (assumed to be undergoing a loss process) was analysed. The subfamily Phytoseiinae has ‘lost’ the highest number of primitive setae, the subfamily Amblyseiinae has ‘retained’ the highest number and Typhlodrominae has an intermediate position, except for the seta z6. The subfamily Phytoseiinae shows the highest number of setae undergoing a loss process, whereas the subfamily Typhlodrominae has lost these setae in 674 species and subfamily Amblyseiinae in 415 species, making this latter subfamily that with the most retained dorsal setae. According to spatial seta occurrence, it could be hypothesized that Amblyseiinae originated from South Gondwana, Typhlodrominae from the Euro‐America region (Laurasia zone) and Phytoseiinae from the Ethiopian area. The presently admitted classification of Phytoseiidae is discussed with regard to the occurrence of rarely present setae (assumed to have been lost in high frequency). © 2014 The Linnean Society of London, Biological Journal of the Linnean Society, 2014, 112 , 606–624.     

Vectorial role of some dermanyssoid mites (Acari, Mesostigmata, Dermanyssoidea)

Among transmissible diseases, vectorial diseases represent a major problem for public health. In the group of acarina, while ticks are the most commonly implicated vectors, other arthropods and notably Dermanyssoidea are also involved in the transmission of pathogenic agents. Since the role of this superfamily is at present largely unknown, we have reviewed the vectorial role of these mites in the appearance, survival and propagation of pathogens. Various authors have shown that Dermanyssoidea are implicated in the transmission of both bacteria (Salmonella, Spirocheta, Rickettsia or Pasteurella) and viruses (equine encephalitis viruses, West Nile virus, Fowl pox virus, the virus causing Newcastle disease and tick borne encephalitis viruses or hantaviruses). Finally, some authors have also shown their role in the transmission of some protozoa and filaria. As the vectorial character of such mites has been more clearly demonstrated (Dermanyssus gallinae, Omithonyssus bacoti and Allodermanyssus sanguineus), it would be interesting to continue studies to better understand the role of this superfamily in the epidemiology of certain zoonoses.     

革螨新同物异名(蜱螨亚纲:中气门亚目)

The present paper reports new synonyms ofgamasid mites （2 genera and 28 species）.     

Leg chaetotaxy and the classification of the Uropodina (Acari: Mesostigmata)

Details of the segmental chaetotaxy of the legs of 47 species of Uropodina are given. On the basis of the ontogenetic development of the chaetotaxy, the Uropodina may be divided into two groups which coincide with the concepts of the Lower (Polyaspidoidea) and Higher (Uropodoidea) Uropodina of certain authors. Chaetotactic criteria do not support the classification of the Polyaspidini and Trachyuropodini sensu Hirschmann and Z-Nicol within the Oplitinae Hirschmann & Z-Nicol, the Diarthrophallini within the Uroactiniinae Hirschmann & Z-Nicol or the genus Trachytes within the Uropodini.
A critical appraisal is given of the classification of the Uropodidae (based on "Gangmerk-male") by Hirschmann and Z-Nicol.     

Fine structure of the spermatozoon in the mite Parasitus niveus (Mesostigmata,Acari)

The spermatozoa of the mite, Parasitus niveus, are rod-shaped cells possessing a very elongated and zig-zag shaped nucleus. The cytoplasm is filled by so-called “striated bodies” and mitochondria. The plasmalemma forms five complicated structures, called stiff bands. In the peripheral cytoplasm lie flattened canaliculi and flattened cisternae. The morphology of the spermatozoa is compared with that of other mite spermatozoa described in the literature.     

Rickettsial Agents from Parasitic Dermanyssoidea (Acari: Mesostigmata)

Mites are often overlooked as vectors of pathogens, but have been shown to harbor and transmit rickettsial agents such as Rickettsia akari and Orientia tsutsugamushi. We screened DNA extracts from 27 mites representing 25 species of dermanyssoids for rickettsial agents such as Anaplasma, Bartonella, Rickettsia, and Wolbachia by PCR amplification and sequencing. DNA from Anaplasma spp., a novel Bartonella sp., Spiroplasma sp., Wolbachia sp., and an unclassified Rickettsiales were detected in mites. These could represent mite-borne bacterial agents, bacterial DNA from blood meals, or novel endosymbionts of mites.     

螨属二新种(蜱螨亚纲:中气门亚目)

记述虫穴螨属２新种：小兴安岭虫穴螨 Ｚｅｒｃｏｎ ｘｉａｏｘｉｎｇａｎｌｉｎｇｅｎｓｉｓ, ｓｐ． ｎｏｖ． 和黑龙江虫穴螨 Ｚｅｒｃｏｎ ｈｅｉｌｏｎｇｊｉａｎｇｅｎｓｉｓ, ｓｐ． ｎｏｖ．。模式标本保存在吉林省白城市全国鼠疫布氏菌病防治基地     

New Uropodina species (Acari: Mesostigmata) and records from Kenya

Chelonuropoda africana sp. n. is described with original drawings and scanning micrographs. New records of two other Uropodina species, Neodiscopoma crenulatum Marais et Theron, 1986 and Rotundabaloghia feherdii Kontschán, 2004 from Kenya are given.     

The external morphology of the pseudoscorpion Roncus andreinii

The external morphology of the four postembryonic instars of Roncus andreinii (di Caporiacco, 1925) is described and compared with one of the related R. lubricus L. Koch, 1873 (Gabbutt & Vachon, 1967), with particular emphasis on disposition of the chelal trichobothria in relation to growth.
From the evaluation of characters it is concluded that a few morphometric and chaetotaxic characters (i.e. the length, ratio and shape of pedipalpal articles, the ratio of fingers/pedipalpal hand, the chaetotaxy of sternites II and III) represent good specific discriminants, while the relative position of trichobothria along the chelal axis is nearly the same in both species.
The localization of the growing and non-growing regions along the pedipalpal fingers may be of practical use in the search for new taxonomic characters.     

Three new species of Zerconidae (Acari: Mesostigmata) from Turkey

Three new species, Zercon afyonensis sp. n., Zercon karacamehmeti sp. n. and Zercon soguticus sp. n., are described and illustrated based on samples collected in the Inner Aegean Region. The similarities and differences between the related species are discussed.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:3FA1701A-A243-4E45-8AE9-FCB733CC56A6     

吉林省长岭草原不同生境土壤中气门螨类调查（蜱螨亚纲）

在长岭草原共采到中气门螨9科15属20种。优势种为胸前下盾螨Hypoaspis praesternalis Willmann,1949,螨数和分布生境数最多,常见种有10种,稀有种为9种。在调查的20个生境中,羊草杂类草生境螨数和螨种数最多,碱茅生境没有采到螨,其余18个生境都采到不同数量的螨。