A new quill mite species of the family Syringophilidae and subfamily Picobiinae, Charadriineopicobia janegoodallae sp. nov., is described. It was collected from Wedge-rumped Storm-Petrel Hydrobates tethys (Bonaparte), a representative of the order Procellariiformes and family Hydrobatidae. Our finding is the first record of the subfamily Picobiinae on procellariform hosts and the first record of quill mites of the family Syringophilidae collected from birds inhabiting the Galápagos Islands. Additionally, an identification key to females of all known species of Charadriineopicobia is presented. Because all other species of the genus Charadriineopicobia were found on phylogenetically distant avian hosts of the order Charadriiformes and families Charadriidae, Scolopacidae, and Laridae, we hypothesize that presence of this new mite species parasitizing H. tethys is a result of the mite switching from charadriiform hosts inhabiting the same ecological niche.

Nothrotrombidium sadeghii Noei and Kohansal sp. nov. (Acari: Trombidiformes: Trombellidae) ectoparasitic on Erebidae, Noctuidae, Geometridae, Plutellidae (Lepidoptera) and Tettigoniidae (Orthoptera) in Hotel Kouhestan and Band-e dareh regions, Chahardeh, Chahkand, Chahkandan, Esfahrood, Giuk, Noferest, Rach and Razg villages, Birjand city, South Khorasan province, Iran, is described and illustrated. A key to world larval species of Nothrotrombidium is provided.

Aceria guerreronis Keifer and Steneotarsonemus furcatus De Leon are phytophagous mites that attack coconut fruits. These mites establish their colonies under the bracts in the perianth where they feed, causing necrosis and a loss of fruit quality and commercial value. Phytoseiidae is considered the most important family for the control of pest mites. With 256 species documented, the Phytoseiid fauna in Brazil is highly diversified. They are distributed across all Brazilian biomes, including the Amazon, Caatinga, Cerrado, Pampa, Atlantic Forest, and Pantanal. Regardless of the fact that the Amazon biome occupies an estimated 49% of the Brazilian territory, its acarofauna remains unexplored. In this region, coconut is one of the most cultivated crops, although the variety of mites in this crop in the Amazon is yet unclear. This information is essential since there are potential predatory species that can play an important role in the biological control of coconut pests. Thus, the present study investigated the diversity and seasonality of mites in coconut fruits in the Eastern Amazon production region throughout the year. Data were collected monthly and analyzed to determine the diversity and seasonality. The faunistic indices were calculated using the program ANAFAU, and the abundance and diversity of phytoseiids were analyzed using the software EstimateS. As the fruit ages, the quantity of injured fruits increases. The mites collected belonged to the families: Oribatida (20), Rhodacaroidea (14), Eriophyidae (473,904), Phytoseiidae (147), Tarsonemidae (133), Ascidae (122), Bdellidae (110), Tydeidae (59), Cunaxidae (7), Eupodidae (7), Cheyletidae (5), Blattisociidae (4), and Cryptognathidae (1). Throughout the collection period, A. guerreronis and S. furcatus were detected on fruits with and without damage, with A. guerreronis being the most prevalent. Predatory mites of the Phytoseiidae family were sampled from 12 collections, totaling 147 specimens distributed across eight species. Amblyseius aerialis (Muma) was the predominant predator species. The peak population of A. guerreronis and S. furcatus occurred in different periods, although both species were sampled during periods of high precipitation, suggesting adaptation to the climatic conditions of the region. Temperature was strongly correlated with mites of the Phytoseiidae family. The occurrence of these mites was more common in months with higher temperatures. The mite A. aerialis was discovered in 12 evaluations, with a greater occurrence in October 2019 and August 2020. Understanding the diversity, abundance, and population fluctuations of pest mites and their natural enemies in coconut plants is critical for developing integrated pest management strategies.

Two new species, Newellia xakriaba sp. nov. and Centrotrombidium krenak sp. nov. (Trombidiformes: Parasitengona: Johnstonianidae) from Brazilian caves, are described based on vouchering material for which sequences from multiple genes are available. This article expands the geographical range of the genus Newellia André, 1962 known previously only from Angola.

A new species of Schalleria (Oribatida, Microzetidae)—S. (Paraschalleria) engelbrechti sp. nov.—is described from leaf litter of mixed forest in Cuba; it is similar to S. (P.) forceps in presence of bacilliform basal prodorsal apophysis, but differs by smaller body size, the morphology of the first lobed structure, lamella, bothridial seta, epimeral setae 3c, 4c, distal part of prodorsal apophysis, and the length and morphology of interlamellar seta. A new generic diagnosis of Schalleria is presented. An identification key to known species of the genus is provided.

Neoseiulus cucumeris (Oudemans) is a commercially available biocontrol agent against various pests. This generalist predator was reared on cattail pollen for 10 generations (G10) and its quality was evaluated using functional and numerical responses to Tetranychus urticae Koch nymph densities as prey. The experiments were conducted by offering a range of prey densities (2, 4, 8, 16, 32, 64, and 128 nymphs) under standard conditions (25 ± 1°C, 60 ± 5% RH, and a photoperiod of L16:D8 h). The predator exhibited a type III functional response after ten generations of rearing on cattail pollen (G10), while it was type II when the predator had no experience with pollen (G0). The highest estimated maximum predation rate (T/T_h) was in G0 (127 prey/day), and the lowest was in G10 (85 prey/day); while, the observed maximum predation rate (OMPR) in the mentioned generations was 67 and 84 prey/day, respectively. The number of prey consumed and the number of eggs laid by the predator in G10 was significantly more than G0. The effects of predator's generation, prey density, and their interaction on predation and oviposition rate (on T. urticae) were statistically significant. Therefore, because of the higher predation and oviposition rate, and efficient quality of mass-reared predators on cattail pollen, it is proposed that this pollen can be an appropriate food source for mass rearing of N. cucumeris.

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.

Paratriophtydeus (Platytydaeolus) russelli, a new subgenus and species of the subfamily Tydaeolinae, is described from continental sandy habitats in Sandhausen, southwest Germany. It is characterized by uniquely shaped flattened bothridial setae. Some morphologic and anatomic structures are depicted for Tydaeolinae for the first time.

Water mites of the genus Hygrobates Koch, 1837 are one of the most abundant water mite species in all kinds of running and standing waters in Türkiye. In this study, DNA barcodes were recovered from 26 specimens, morphologically assigned to five Hygrobates species. One species of the H. trigonicus species-complex (H. crypticus sp. nov.) from Eastern Türkiye, is described as new for science. Two species, Hygrobates thori and H. anatolicus were represented by two BINs. The first COI sequences is provided for Hygrobates anatolicus Esen & Pešić, 2013. The current diversity of the genus Hygrobates in Türkiye is discussed based on molecular and morphological data.

Female and male of a new species, Postumius asiaticus sp. nov. (Acari: Stigmaeidae) are described from wet soil in the Asian Russia (Kurgan region and Buryatia). A fragment of the COI barcoding gene was sequenced to facilitate DNA-based identification. The genus Postumius Kuznetsov is reported from Asia for the first time. The male is described for the first time in the genus Postumius. A key to species of Postumius is also provided.

A new monotypic fossil family Unguicheylidae fam. nov. with type genus and species Unguicheylus quadriocellatus gen. nov., sp. nov. is described from the early-Cretaceous (Albian–lower Cenomanian) amber of northern Siberia (Taimyr amber, Baikura locality). The new family is provisionally placed in the superfamily Anystoidea and most similar to the family Pseudocheylidae, but differs mainly in having apomorphically adnate cheliceral bases (free, mobile bases in Pseudocheylidae), and the tarsi of all legs lacking annulated pretarsal stalks bearing reduced claws (present, apomorphic to Pseudocheylidae).