Amazoniaseius imparisetosus n. sp., n. g.: an unusual new phytoseiid mite (Acari: Phytoseiidae) from the Amazon forest.

A new genus and species of the subfamily Typhlodrominae are described from the Brazilian Amazon. The main differences between this and all other phytoseiid species are the presence of two unpaired setae on dorsal shield of deutonymphs and adults, and the absence of all ZV setae. It also differs from other typhlodromine species by its relatively long J5 setae, the presence of seta J4 and the broadly rounded posterior margin of the genital shield. Thus, the unique idiosomal setal pattern of this species is here designated as 13A+x:8F+X/JV-3,4:ZV-1-3. Because of the unique characteristics, we here describe this new taxon, Amazoniaseius imparisetosus n. sp., n. g., based on protonymphs, deutonymphs and adult females. This species is accommodated in tribe Paraseiulini Wainstein within Typhlodrominae, due to the presence of the setae z6 and S4. The tribe is redefined and an updated dichotomous key for the separation of the genera of Paraseiulini is provided.

Definition of the concordis species group of the genus Euseius (Acari: Phytoseiidae), with a morphological reassessment of the species included.

Phytoseiidae (Acari) is the best known family of predatory mites. Within this family, Euseius Wainstein is one of the largest genera. The species of this genus have generalist feeding behavior, including in their diet mites and pollen. Some studies have demonstrated the potential of certain Euseius species to control pest mites. Euseius concordis (Chant) has been mentioned in the literature as potentially useful for the control of the tomato russet mite, Aculops lycopersici (Tryon) (Eriophyidae). Several other American species are morphologically similar to E. concordis; the morphological variation of these species is poorly understood. The objective of this study was a taxonomic re-evaluation of E. concordis and of the world species most similar to it. Measurements of species collected in this study and a taxonomic key to separate the species of this group are provided. Morphological evaluations confirmed that Euseius flechtmanni Denmark & Muma is a junior synonym of E. concordis, and determined that Euseius caseariae De Leon is also a junior synonym of E. concordis, that Euseius ho (De Leon) and Euseius brazilli (El-Banhawy) are junior synonyms of Euseius mesembrinus (Dean) and that Euseius vivax (Chant & Baker) is not a junior synonym of Euseius fructicolus (Gonzalez & Schuster), as previously thought.

Description of a new species of Neoparaphytoseius Chant and McMurtry (Acari: Mesostigmata: Phytoseiidae) from Peru, with a redefinition of the genus.

Neoparaphytoseius charapa n. sp. is described, based on the morphology of adult females and males collected on Inga edulis (Mart.) (Fabaceae) in northeastern Peru. Neoparaphytoseius Chant & McMurtry is redefined on the basis of the new species and re-examination of its type species N. sooretamus Chant & McMurtry. 

Phytoseiidae database: a website for taxonomic and distributional information on phytoseiid mites (Acari).

This paper announces a database on the taxonomy and distribution of mites of the family Phytoseiidae Berlese, which is available online at http://www.lea.esalq.usp.br/phytoseiidae/. Synthesis of species diversity per genus, subfamily and country are given. Information about use of the database is provided.