To enhance modern morphological keys, micrographs and detailed drawings of the holotypes of Brevipalpus olivicola Pegazzano & Castagnoli, Brevipalpus rotai (Castagnoli & Pegazzano), and Brevipalpus mitrofanovi (Pegazzano) are provided, showcasing refined morphological features, along with ontogenetic changes in leg chaetotaxy. Furthermore, Brevipalpus olivicola is compared to Brevipalpus oleae Baker, since there are suspicions that it may be a synonym of B. oleae.

The Andean Páramos is one of the most exceptional ecosystems in tropical mountains of South America. Situated between about 3,000–4,800 meters altitude under extreme environmental conditions it harbors high levels of biodiversity and endemism. We investigated the phytoseiid fauna from two enclaves in Ecuador: wet páramos in the northern Carchi province and dry páramos at the base of Chimborazo volcano. We found ten species, describing eight of them as new to science: Amblyseius anchiops sp. nov., Neoseiulus lobatus sp. nov., N. trapezius sp. nov., Transeius castaneus sp. nov., T. confidens sp. nov., T. variabilis sp. nov., Typhlodromips buchelae sp. nov., and Typhloseiopsis humboldti sp. nov. Surprisingly, most of Amblyseiinae species show a remarkable morphological similarity although they belong to different genera. Their generic emplacement can only be achieved by minor differences in the length of some dorsal setae. This morphological resemblance is discussed in relation to the evolutionary processes that may have led to speciation in the páramos and with respect to the taxonomic practice, where the use of the traditional generic division of the family Phytoseiidae proposed by Chant and McMurtry poses uncertainties or even can be difficult to implement.

Paedonothridae Norton, Ermilov & Bayartogtokh fam. nov. is proposed as a new family of the oribatid mite hyporder Nothrina. It is monotypic, based on Paedonothrus reductus Norton, Ermilov & Bayartogtokh gen. et sp. nov., which was sampled from floating vegetation in a shallow lagoon in Kavaratti Atoll of the tropical Lakshadweep Islands, Arabian Sea, India. As such, it is the first known aquatic oribatid mite that is truly marine. It is easily distinguished by knife-like claws, wide separation of genital and anal valves, and reduction of genital papillae to a single small pair. The latter two are juvenile traits in other nothrines and, considering the many losses of body and leg setae, P. reductus appears to be the most paedomorphic known member of Nothrina. We argue for the inclusion of Paedonothridae in the superfamily Malaconothroidea and present a table of traits differentiating it from Malaconothridae and Trhypochthoniidae. While specimens are few, all are adult females, so P. reductus probably is thelytokous, like all other known members of the superfamily.

Two new tarsonemid species belonging to the genus Tarsonemus Canestrini & Fanzago, 1877 namely Tarsonemus parijatae Karmakar & Kayal sp. nov. and Tarsonemus parulae Karmakar & Kayal sp. nov. are described from specimens collected on leaves of Night Flowering Jasmine, Nyctanthes arbor-tristis L. (Oleaceae) and African Tulip Tree, Spathodea campanulata P.Beauv. (Bigoniaceae) from Chinsurah, West Bengal and Bengaluru, Karnataka respectively.

Neoseiulus bicaudus (Wainstein), a predatory mite native to the Xinjiang Uygur Autonomous Region, China, is an effective predator against various crop pests such as spider mites, whiteflies, and thrips. Understanding the behavioral responses of N. bicaudus in response to temperature decreases during the autumn and winter seasons can help to evaluate the application range of the predatory mites as a biological control. The present study analyzed the survival rate, fecundity, egg hatching rate, and predation ability of N. bicaudus by examining the effects of temperature on female adults and eggs across a broad set of temperature gradients (30 ∼ 20 °C, 25 ∼ 15 °C, 20 ∼ 10 °C, 15 ∼ 5 °C, 10 ∼ 0 °C, 5 ∼ -5 °C, and 0 ∼ -10 °C) (60 ± 10% RH). The results indicated that when the temperature gradient decreased to 10 ∼ 0 °C, the seven-day survival rate of female adults of N. bicaudus began to decline; almost all female adults died when the temperature gradient further decreased to 0 ∼ -10 °C. The fecundity of N. bicaudus gradually declined as the temperature decreased, and the mites ultimately ceased to lay eggs at a temperature gradient of 5 ∼ -5 °C. The hatching rate of N. bicaudus eggs decreased with the temperature decreased, eventually reaching 0% at 0 ∼ -10 °C. The predation ability of N. bicaudus for the prey Tetranychus turkestani (Ugarov et Nikolskii) gradually diminished as the temperature decreased, characterized by a reduced attack rate (a) and a concurrent progressive increase in the handling time (T_h). When the temperature gradient decreased to 0 ∼ -10 °C, N. bicaudus terminated feeding activity. The survival rate, fecundity, egg hatching rate, and predation efficiency of N. bicaudus suddenly declined when the temperature gradient decreased to 0 ∼ -10 °C. The results suggest that the lowest winter temperatures will limit the overwintering population of N. bicaudus and that this predatory mite may successfully overwinter as eggs and female adults in temperatures above the 0 ∼ -10 °C. In addition, the availability of food may be a crucial determining factor in the predatory mites' choice of overwintering sites. This study provides data for the field application and conservation of N. bicaudus.

Despite the significant abundance of four Euseius species, across different regions of the Western Palearctic, including Türkiye, studies on their systematics have been limited to either morphological or molecular methods, with no studies using both approaches together. This study comprehensively evaluates these four species, using both detailed morphological characteristics and molecular analyses based on ITS DNA fragments. We also examine Iphiseius degenerans (Berlese), previously classified in the monotypic genus Iphiseius, which still belongs to the subtribe Euseiina. Morphological analysis revealed that the measurements and other characters of these species perfectly match their original descriptions and redescriptions. Additionally, the anterolateral seta on trochanter I was modified into a subulate shape in all five species. Molecular analysis showed minimal genetic divergence (0.000–0.009) within each Euseius species. Iphiseius degenerans did not exhibit genetic separation from other Euseius species, supporting its reclassification as Euseius degenerans comb. nov. Phylogenetic tree showed that each species formed distinct clades, confirming low intraspecific genetic divergence. Sequences of E. scutalis from Türkiye and Israel were genetically distinct from those from France and Spain. Although the genetic divergence was low (0.009), below the commonly used 2.8–3.0% species threshold, this may suggest the potential presence of two cryptic species. This integrative approach highlights the limitations of the currently used morphological classification system and emphasizes the need for more molecular studies to refine phytoseiid taxonomy.

Two genera and three species of the family Phytoseiidae (Acari: Mesostigmata), Paragigagnathus insuetus (Livshitz & Kuznetsov), Euseius ovalis (Evans), and Neoseiulella litoralis (Swirski & Amitai), are reported for the first time from Syria. Additional morphological information and new illustrations for the new records, as well as an identification key for the Syrian species of Phytoseiidae, are presented.

The current research provides a new species description, Colopalpus kvavadzei sp. nov., and one new record, Tenuipalpus granati Sayed, 1946, for Georgian flat mite's fauna. Colopalpus kvavadzei sp. nov. is described and illustrated based on the adult female and male specimens collected from Achillea millefolium (Asteracea). The chaetotaxy of palp, leg, and body is presented. An identification key for the species of the genus Colopalpus distributed worldwide is provided. The flat mites of the family Tenuipalpidae reported in Georgia have increased to 35 species.

Tetranychus urticae Koch (Acari: Tetranychidae) is an important pest causing economic losses in many cultivated crops worldwide. In the control of the pest, frequent insecticide/acaricide applications are preferred in the first place. However, factors such as the high reproduction rate and short life cycle of Tetranychus urticae make it easy to develop resistance to chemicals after a few applications. Wolbachia, Spiroplasma and Cardinium endosymbionts are found in many pest species including mites and cause different effects on the pest. In this study, pyridaben resistance in field populations of T. urticae and its relationship with detoxification enzymes were investigated. In addition, the presence of Wolbachia, Spiroplasma and Cardinium endosymbionts in Tetranychus urticae populations were investigated. Dry residue method was used to determine pyridaben resistance in T. urticae. In toxicity trials, 7 acaricide doses + 1 control group were used. Each group consisted of 3 replicates. In each replicate, there were 25 adult T. urticae individuals. Acaricides were applied as 2 mL on the leaf surface at a pressure of 1 atm using a spray tower. Dead-live counts of the populations were made after 72 hours. Pyridaben resistance ratios of Tetranychus urticae populations were determined by the ratio of LC₅₀ values of the field populations to LC₅₀ values of the susceptible population. The LC₅₀ value of pyridaben for the susceptible population GSS and an pesticide unexposed population were found to be approximately same around 10 mg/L. Compared to these populations, the highest resistance ratio were found to be 12.2 in Ca2 and Ce1 populations whereas Ca3 population had the lowest resistance ratio of 7.2 for field populations. In addition, high esterase and monoxygenase enzyme activities were determined in field populations of T. urticae. Wolbachia was found in all Tetranychus urticae populations at varying frequencies and Cardinium endosymbiont was found in only six of seventeen populations. Wolbachia endosymbiont found in the mite populations were found to be two haplotypes differing at a single SNP loci for 650bp wsp gene. In contrast, the presence of a Spiroplasma endosymbiont was not identified in any of the T. urticae populations tested.