Liothrips tractabilis sp.n. (Thysanoptera: Phlaeothripinae) da Argentina, um Potencial Agente de ControleBiológico da Planta Daninha Campuloclinium macrocephalum (Asteraceae) na África do Sul

A new species, Liothrips tractabilis, is described from northern Argentina. Feeding by this thrips causes severe damage to the leaves of Campuloclinium macrocephalum, a plant that has been introduced to South Africa where it is a serious weed of grasslands. A key is provided to the four species of the genus Liothrips recorded from Argentina.Uma nova espécie, Liothrips tractabilis, é descrita do norte da Argentina. Essa espécie causa severo dano nas folhas de Campuloclinium macrocephalum, que foi introduzida à África do Sul, onde é planta daninha em pastagens. Uma chave é apresentada para as quatro espécies do gênero Liothrips registradas na Argentina.Fil: Pereyra, Veronica Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; ArgentinaFil: Mound, Laurence. CSIRO Exploration and Mining; Australi

Vicariance or dispersal- trans-Tasman faunal relationships among Thysanoptcra (Insecta), with a second species of Lomatothrips from Podocarpus

Lomatothrips pinopsidis sp.n. (Insecta: Thysanoptera) is described as the second species of the genus. This species is widespread in Australia on Podocarpus and Callitris male cones, but the only other species in the genus is from New Zealand breeding in vegetative buds of Podocarpus. This is possibly an example of trans-Tasman vicariance, although the thrips fauna of New Zealand is shown to be largely dispersed from Tasmania and mainland Australia

Fungal Spore-Feeding Thrips (Thysanoptera: Phlaeothripidae: Ldolothripinae) from Iran with Record of a Fourth Genus

The genus Allothrips Hood, with one species A. bournieri Mound, is reported for the first time in Iran and the generic classification of Phlaeothripidae is discussed briefly. A key is provided to distinguish the four genera recorded in Iran of the spore-feeding thrips in the ldolothripinae

Seasonal abundance and biology of sporophagous thrips and notes on other thrips (Insecta, Thysanoptera) on the Mediterranean oak, Quercus rotundifolia L. in, Navarra (N Spain)

This paperrecords the seasonal abundance of four species of sporophagous thrips collected on the Mediterranean oak, Quercus rotundifolia L., in the Mediterranean area of Navarra (N Spain). The life cycles of Cornpsothrips albosignatus (Reuter), Priesneriella clavicornis (Knechtel); Megalothrips bonannii Uzel and Cryptohrips nigripes (Reuter) are reported, and notes given about habitat specificity and wing development. Notes about host specific Terebrantia thrips of the Mediterranean oak are also reported. Key words: Thysanoptera, Tubulifera, Seasonal abundance, Life cycle, Sporophagous thrips, Quercus rotundifolia.This paperrecords the seasonal abundance of four species of sporophagous thrips collected on the Mediterranean oak, Quercus rotundifolia L., in the Mediterranean area of Navarra (N Spain). The life cycles of Cornpsothrips albosignatus (Reuter), Priesneriella clavicornis (Knechtel); Megalothrips bonannii Uzel and Cryptohrips nigripes (Reuter) are reported, and notes given about habitat specificity and wing development. Notes about host specific Terebrantia thrips of the Mediterranean oak are also reported. Key words: Thysanoptera, Tubulifera, Seasonal abundance, Life cycle, Sporophagous thrips, Quercus rotundifolia.This paperrecords the seasonal abundance of four species of sporophagous thrips collected on the Mediterranean oak, Quercus rotundifolia L., in the Mediterranean area of Navarra (N Spain). The life cycles of Cornpsothrips albosignatus (Reuter), Priesneriella clavicornis (Knechtel); Megalothrips bonannii Uzel and Cryptohrips nigripes (Reuter) are reported, and notes given about habitat specificity and wing development. Notes about host specific Terebrantia thrips of the Mediterranean oak are also reported. Key words: Thysanoptera, Tubulifera, Seasonal abundance, Life cycle, Sporophagous thrips, Quercus rotundifolia

Two new Australian fungus-feeding thrips in two new Plectrothripini genera (Thysanoptera, Phlaeothripinae)

Two new genera are erected of plectrothripine Phlaeothripidae from northern Australia, each based on a single species. One has a long stout projection ventrally on the second antennal segment, the other has a unique arrangement of the dorsal facets of the compound eyes. In both of them the thoracic ventral sclerites are extensively eroded. The tribe Plectrothripini is one of the few apparently discrete lineages within the large and complex subfamily Phlaeothripinae (Dang et al. 2014). The species in this Tribe are all fungus-feeders on dead branches, and the group is found in the tropics worldwide. Okajima (1981) provided an extensive, illustrated account of the Plectrothripini, recognising 10 genera and almost 50 species, to which Tyagi et al. (2016) added one further species. Six of these genera remain monotypic, with two genera each comprising five or six species, and Plectrothrips itself with about 30 species. This asymmetry of taxon distribution, with a high proportion of monotypic genera, is due to the presence of certain characters in unusual autapomorphic states. Phylogenetic relationships within the tribe are further confused here through the diagnosis of two new monotypic genera for species from the tropical north of Australia. One of these new species has a bizarre projection ventrally on the second antennal segment (Fig. 5), whilst the other has the structure of the compound eyes unique amongst Phlaeothripidae (Figs 7, 8). Membership of the Tribe Plectrothripini is fairly clear, with the species sharing most of the following character states as indicated by Okajima (1981): antennae 8-segmented, segment II with the campaniform sensillum on the basal half, III–IV with a variable number of short, stout sense cones, VIII elongate with narrow base. Head with posterior ocelli close to compound eyes. Pronotum commonly with sclerotised plate eroded and reduced; prosternal basantra absent; fore tarsal tooth large; apex of hind tibiae commonly with stout setae. Pelta wide at base, tergite II eroded laterally; sternites often with reticulate glandular areas

A New Species of Charassothrips Hood from Colombia (Insecta, Thysanoptera, Thripidae) with an Updated Key to the Known Species

Charassothrips macroseta sp.n. is described and illustrated from Colombia. A key is provided to the five species now recognised in the Neotropical genus Charassothrips, each of which has the head and pronotum, mesonotum and metanotum prominently sculptured and the abdominal tergites with a craspedum on the posterior margins

The observational signature of modelled torsional waves and comparison to geomagnetic jerks

Torsional Alfven waves involve the interaction of zonal fluid flow and the ambient magnetic field in the core. Consequently, they perturb the background magnetic field and induce a secondary magnetic field. Using a steady background magnetic field from observationally constrained field models and azimuthal velocities from torsional wave forward models, we solve an induction equation for the wave-induced secular variation (SV). We construct time series and maps of wave-induced SV and investigate how previously identified propagation characteristics manifest in the magnetic signals, and whether our modelled travelling torsional waves are capable of producing signals that resemble jerks in terms of amplitude and timescale. Fast torsional waves with amplitudes and timescales consistent with a recent study of the 6 yr ∆LOD signal induce very rapid, small (maximum ∼2 nT/yr at Earth’s surface) SV signals that would likely be difficult to be resolve in observations of Earth’s SV. Slow torsional waves with amplitudes and timescales consistent with other studies produce larger SV signals that reach amplitudes of ∼20 nT/yr at Earth’s surface. We applied a two-part linear regression jerk detection method to the SV induced by slow torsional waves, using the same parameters as used on real SV, which identified several synthetic jerk events. As the local magnetic field morphology dictates which regions are sensitive to zonal core flow, and not all regions are sensitive at the same time, the modelled waves generally produce synthetic jerks that are observed on regional scales and occur in a single SV component. However, high wave amplitudes during reflection from the stress-free CMB induce large-scale SV signals in all components, which results in a global contemporaneous jerk event such as that observed in 1969. In general, the identified events are periodic due to waves passing beneath locations at fixed intervals and the SV signals are smoothly varying. These smooth signals are more consistent with the geomagnetic jerks envisaged by Demetrescu and Dobrica than the sharp ‘V’ shapes that are typically associated with geomagnetic jerks

The work of Jaroslav Pelikan on Insects of the order Thysanoptera.

Diese Arbeit ist eine kleine Ehrung für Doc. Ing. Dr. Jaroslav Pelikán, DrSc, einen bekannten Wissenschaftler auf den Gebieten der Entomologie, Theriologie und Ökologie. Er beschrieb rund 80 neue Arten und sieben neue Gattungen von Fransenflüglern (Thysanoptera). Seine Arbeiten auf nationaler Ebene schliessen neben detaillierteren Beiträgen zur Fauna der Tschechoslowakei einige Checklisten ein. Am 22. April 2006 feierte Jaroslav Pelikán seinen 80. Geburtstag.The paper is a small tribute to Doc. Ing. Dr. Jaroslav Pelikán, DrSc, who has been a reputable scientist in the fields of entomology, theriology and ecology. He described about 80 new species of thrips as well as seven new genera of Thysanoptera. His national contributions included several checklists, together with his more complex contribution within the Fauna of Czechoslovakia. On the 22nd of April 2006 Jaroslav Pelikán celebrated his 80th birthday

The formation and evolution of cracks during nanoindentation of fused quartz

Brittle materials such as fused quartz and other silicate glasses are commonly used in photovoltaics, semiconductors, and consumer electronics in the form of thin films. In these applications and a variety of others there is a need to understand how cracking occurs in these inherently brittle materials during contact and impact with hard, sharp objects. To this end, nanoindentation, high resolution scanning electron microscopy (SEM), and focused ion beam cross-sectioning (FIB) have been used to characterize the formation and evolution of surface and subsurface cracks in fused quartz (GE 124, Momentive). A series of experiments was performed using five three-sided pyramidal indenters with varying centerline-to-face angles (35.3°, 45°, 55°, 65.3°, and 75°) and peak indentation loads ranging from 10 to 500 mN. Distinct threshold loads below which no cracking could be observed were established, and a detailed set of experiments using FIB cross-sections to examine the sub-surface behavior was performed with the 45° indenter to document how cracking evolves as a function of load from sub-threshold all the way up to spalling and chipping. Finite element simulations were used to illuminate the stresses that may influence the cracking behavior. Relevant results and observations are discussed and compared to previous indentation cracking studies conducted at larger scales using Vickers and spherical indenters. The new results are used to assess prevailing models for indentation cracking and the origin of indentation cracking thresholds Please click Additional Files below to see the full abstract

Panchaetothrips indicus bagnall, a new pest record from Peninsular Malaysia, collected on leaves of Zingiber officinale Rosc. var. Bentong

The Old World genus Panchaetothrips are currently comprises seven species and distributed between Africa, Asia and Australia. Some species were reported as important pest of coffee, arrowroot, banana and turmeric. In this paper, Panchaetothrips indicus, previously known only from India is newly recorded from Peninsular Malaysia, collected on leaves of Zingiber officinale Rosc. var. Bentong. The description is indicating the P. indicus from the specimen taken from Malaysia