Latitudinal distribution and mitochondrial DNA (COI) variability of Stereotydeus spp. (Acari: Prostigmata) in Victoria Land and the central Transantarctic Mountains

We examined mitochondrial DNA (COI) variability and distribution of Stereotydeus spp. in Victoria Land and the Transantarctic Mountains, and constructed Neighbour Joining (NJ) and Maximum Likelihood (ML) phylogenetic trees using all publicly available COI sequences for the three Stereotydeus species present (S. belli, S. mollis and S. shoupi). We also included new COI sequences from Miers, Marshall and Garwood valleys in southern Victoria Land (78°S), as well as from the Darwin (79°S) and Beardmore Glacier (83°S) regions. Both NJ and ML methods produced trees which were similar in topology differing only in the placement of the single available S. belli sequence from Cape Hallett (72°S) and a S. mollis haplotype from Miers Valley. Pairwise sequence divergences among species ranged from 9.5–18.1%. NJ and ML grouped S. shoupi from the Beardmore Glacier region as sister to those from the Darwin with pairwise divergences of 8%. These individuals formed a monophyletic clade with high bootstrap support basal to S. mollis and S. belli. Based on these new data, we suggest that the distributional range of S. shoupi extends northward to Darwin Glacier and that a barrier to dispersal for Stereotydeus, and possibly other arthropods, exists immediately to the north of this area

Activity and Diversity of Collembola (Insecta) and Mites (Acari) in Litter of a Degraded Midwestern Oak Woodland

Litter-inhabiting Collembola and mites were sampled using pitfall traps over a twelve-month period from four sub-communities within a 100-acre (40-ha) oak-woodland complex in northern Cook County, Illinois. Sampled locations included four areas where future ecological restoration was planned (mesic woodland, dry-mesic woodland, mesic upland forest, and buckthorn-dominated savanna) and a mesic woodland control that would not be restored. Fifty-eight mite and 30 Collembola taxa were identified out of 5,308 and 190,402 individuals trapped, respectively. There was a significant positive relationship between litter mass and both mite diversity and the ratio of Oribatida to Prostigmata and a significant negative relationship between Collembola diversity and litter. Based on multivariate analysis, Collembola and mite composition differed by sub-community and season interaction

Eriophyoid mites (Acari: Prostigmata: Eriophyoidea) from the Maltese Islands (Central Mediterranean): new reports and a preliminary check-list

In the 20th Century, about 20 species of eriophyoids were listed for the Maltese Islands but these reports were entirely based on plant gall surveys. In these last four years, plant collections were made in order to investigate the species of eriophyoids present in Malta and Gozo. Most of the earlier reports have been confirmed and eight species were found to be new for the Maltese islands: Aceria caulobia (Nalepa) gall-making on Suaeda vera Gmelin; Aceria onychia (Nalepa) on Phlomis fruticosa L.; Aceria sheldoni (Ewing) on lemon; Aculus tetanothrix (Nalepa) gall-making on Salix sp.; Cecidophyopsis hendersoni (Keifer) on yucca; and three species associated with olive, Ditrymacus athiasella Keifer, Oxycenus maxwelli (Keifer) and Tegolophus hassani ( Keifer). Additional remarks were included for Acalitus phloeocoptes (Nalepa), collected on cherry plum, whose earlier Maltese record was doubtful. A complete morphometric description of Aceria carlinae (Nalepa) is here provided.peer-reviewe

A New Species of \u3ci\u3eCaraboacarus\u3c/i\u3e (Acari: Caraboacaridae) From \u3ci\u3eCalosoma Argentinense\u3c/i\u3e (Carabidae) From Chile

Caraboacarus calosomae n. sp is described from Calosoma argentinense Csiki collected in Santiago, Chile. This is the first record of this genus in South America. The genius is recorded from North America, Europe, Asia. and Guadalcanal Island in the Pacific Ocean

Water, rather than temperature, dominantly impacts how soil fauna affect dissolved carbon and nitrogen release from fresh litter during early litter decomposition

Longstanding observations suggest that dissolved materials are lost from fresh litter through leaching, but the role of soil fauna in controlling this process has been poorly documented. In this study, a litterbag experiment employing litterbags with different mesh sizes (3 mm to permit soil fauna access and 0.04 mm to exclude fauna access) was conducted in three habitats (arid valley, ecotone and subalpine forest) with changes in climate and vegetation types to evaluate the effects of soil fauna on the concentrations of dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) during the first year of decomposition. The results showed that the individual density and community abundance of soil fauna greatly varied among these habitats, but Prostigmata, Isotomidae and Oribatida were the dominant soil invertebrates. At the end of the experiment, the mass remaining of foliar litter ranged from 58% for shrub litter to 77% for birch litter, and the DOC and TDN concentrations decreased to 54%-85% and increased to 34%-269%, respectively, when soil fauna were not present. The effects of soil fauna on the concentrations of both DOC and TDN in foliar litter were greater in the subalpine forest (wetter but colder) during the winter and in the arid valley (warmer but drier) during the growing season, and this effect was positively correlated with water content. Moreover, the effects of fauna on DOC and TDN concentrations were greater for high-quality litter and were related to the C/N ratio. These results suggest that water, rather than temperature, dominates how fauna affect the release of dissolved substances from fresh litter

A New Species of Mite (Acari: Podapolipidae) From a Michigan Carabid Beetle, \u3ci\u3eChlaenius Pennsylvanicus\u3c/i\u3e

Eutarsopolipus regenfussi n. sp. is described from the Michigan carabid beetle, Chlaenius pennsylvanicus (L.)

Raubmilben und Prostigmata-Milben in der Bodenstreu bei der Hähnchenmast in zwei unterschiedlichen Stallsystemen (konventionell und Trampoline-System) in Niedersachsen (Acari: Gamasina, Prostigmata)

Es werden die Gamasina-Milben (deutsch Raubmilben) in jeweils zwei StalIsystemen (konventionell und Trampoline-System) in Halle bei Petershagen (Landkreis Minden) und Werlte (Landkreis Emsland) untersucht, beide in Niedersachsen, Deutschland. Im Trampoline- StalIsystem (Firma Hendrix/Niederlande) wird das Bodensubstrat während der Mastperiode getrocknet. In den vier Ställen wird gehäckseltes Stroh (1kg/m2) als Einstreu benutzt. Durch die Substrattrocknung reduziert sich der Bestand der Astigmata-Milbe Sancassania berlesei auf 0,01 bis 0,1 % im Vergleich mit dem konventionellen Stall. Im konventionellen Stall in Halle kamen Androlaelaps cssslis, Dendrolaelaps longiusculus, Procto/aelaps pygmeus, Hypoaspis aculeifer sowie Macrocheies sp. vor. Die durchschnittliche Dichte der untersuchten Proben lag bei ca. 140 Raubmilben/ 100 g. In der parallel/gleichzeitig durchgeführten Mast in dem Stall mit Substratrocknung kamen nur ca. 10 Raubmilben/100g vor. Zusätzlich wurden große Populationen der Prostigmata- Milbe Tarsonemus rakowiensis angetroffen, die sich von Schimmelpilzen ernährt. In den Ställen in Werlte traten zusätzlich Blattisocius keegani, Paragarmania dendritica und Ameroseius plumea auf. Im konventionellen Stall hat Ameroseius plumea einen Anteil von 23 % an der Raubmilben-Fauna. Sie ernährt sich nicht räuberisch, sondern frißt Schimmelpilze und deren Sporen. Im Trampoline-Stallsystem erreicht sie maximal Abundanzen von 2.900 und 4.085 Milben/ 100g. Sie stellt damit hier einen Anteil von 72 % an der Acarofauna.Gamasina-mites were investigated in two different types of broiler houses (conventional and Trampoline management system) in Halle near Petershagen (District Minden) and Werlte (District Emsland), both Lower Saxony, Germany. In the Trampoline management system the ground substrate was dehydrated. In these four broiler houses, chaff (1kg/m2) was used as substrate. Due to the dehydration of the substrate, the abundance of the frequently found Astigmata-mite Sancassania berlesei (max. 5,000 mites/g in the conventional type broiler house) was reduced to a level of 0.01 to 0.1 %. In the conventionally run system in Halle, Androlaelaps casalis, Dendrolaelaps longiusculus, Proctolaelaps pygmeus, Hypoaspis aculeifer and Macrocheies sp. were found. The average density of the examined sampies ranged at approx. 140 Gamasina-mites/100g. In the parallelly/simultaneously run Trampoline-system, 10 Gamasina-mites/100g were found in the substrate only. Additionally, big populations of the Prostigmata-mite Tarsonemus rakowiensis were found. This mite feeds on mould. In the broiler houses in Werlte, in addition, Blattisocius keegani, Paragarmania dendritica and Ameroseius plumea occurred. In the conventionally run system, the proportion of Ameroseius plumea ranges at 23 % of the Gamasina-fauna. Ameroseius plumea is not predaceous; it feeds on mould and its spores. In the substrate in the Trampoline system, this mite at most reaches an abundance of 2,900 and 4,085 mites/100g. This amounts to 72 % of the whole entire population

Efeito da aplicação de lodo de ETE sobre a acarofauna edáfica em áreas de plantio de Pinus taeda L. (Pinaceae).

IV SIBAC. Resumo

Nueva asociación entre el ácaro Erythraeus sp. (Acari: Prostigmata: Parasitengona) y el psílido Russelliana adunca (Hemiptera: Psylloidea)

The association between the ectoparasitic mite, Erythraeus Latreille (Acari: Prostigmata: Parasitengona) and the psyllid Russelliana adunca Burckhardt (Hemiptera: Psylloidea) is reported for the first time. Larval erythraeid mites are not common on psyllids, therefore this first report adds a new host association and widens the distribution of the mite in South America.Se registra por primera vez la asociación entre el ácaro ectoparásito Erythraeus Latreille (Acari: Prostigmata: Parasitengona) y el psílido Russelliana adunca Burckhardt (Hemiptera: Psylloidea). Las larvas de ácaros eritreidos no son comunes sobre psílidos, por lo que este primer registro adiciona un nuevo huésped y amplía la distribución del ácaro en Sudamérica.Fil: Baliotte, Carla. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; ArgentinaFil: Aquino, Daniel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Dellapé, Gimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; ArgentinaFil: Lopez Armengol, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Gittins López, Cecilia Gabriela. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Cédola, Claudia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; Argentin