Cryptic diversity of the jewel beetles Agrilus viridis (Coleoptera: Buprestidae) hosted on hazelnut

The genus Agrilus (Coleoptera: Buprestidae) represents a taxonomic puzzle, since the boundaries between species, subspecies and morphotypes tied to different host plants are sometimes difficult to establish on morphological characteristics alone. Some Agrilus species can cause severe agricultural damage; this makes correct distinctions of the taxon and knowing whether the insects switch from one host plant to another important. This study of mtDNA examined the genetic characteristics of lineages of A. viridis, a jewel beetle recently found causing damage to the hazelnut Corylus avellana in NW Italy. Three mitochondrial markers (a portion of the 12S rDNA and a DNA-fragment including partial NADH dehydrogenase subunit I gene, the tRNA Leucine gene and partial 16S rDNA, and partial  Cytochrome c oxidase) were compared between individuals collected on birch Betula sp., beech Fagus sp., willow Salix sp., alder Alnus sp. and hazelnut. We found a high genetic distance between A. viridis sampled on different host plants, while individuals sampled on the same host plant were similar despite a considerable geographic gap between sampled areas. Our study supports the general pattern for strong ecological separation between populations living on different host plants

Preimaginal Stages of the Emerald Ash Borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae): An Invasive Pest on Ash Trees (Fraxinus)

This study provides the most detailed description of the immature stages of Agrilus planipennis Fairmaire to date and illustrates suites of larval characters useful in distinguishing among Agrilus Curtis species and instars. Immature stages of eight species of Agrilus were examined and imaged using light and scanning electron microscopy. For A. planipennis all preimaginal stages (egg, instars I-IV, prepupa and pupa) were described. A combination of 14 character states were identified that serve to identify larvae of A. planipennis. Our results support the segregation of Agrilus larvae into two informal assemblages based on characters of the mouthparts, prothorax, and abdomen: the A. viridis and A. ater assemblages, with A. planipennis being more similar to the former. Additional evidence is provided in favor of excluding A. planipennis from the subgenus Uragrilus

The Biology and Ecology of the Emerald Ash Borer, Agrilus planipennis, in China

The biology, ecology, and life cycle of the emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), were studied using regular inspection in the forest and observations in the laboratory. Results indicated that A. planipennis are mostly univoltine in Tianjin, China. They overwintered individually as mature larvae in shallow chambers excavated in the outer sapwood. In late July, some full-grown larvae began to build overwintering chambers, and all larvae entered the sapwood for dormancy by early November. A. planipennis pupated in the overwintering chamber from early April to mid May the following year, and the average pupal duration was about 20 days. In late April, some newly eclosed adults could be found in the pupal cells, but they had not yet emerged from the tree. Adults began to emerge in early May, with peak flight occurring in mid May. The average longevity of adults was about 21 days and the adult stage lasted through early July. The adults fed on ash foliage as a source of nutrition. Mating was usually conducted and completed on the leaf or trunk surfaces of ash trees. Oviposition began in mid May and eggs hatched on average in 15.7 days. The first instar larvae appeared in early June. The larval stage lasted about 300 days to complete an entire generation. The emerald ash borer had four larval instars on velvet ash, Fraxinus velutina (Scrophulariales: Oleaceae). The major natural control factors of A. planipennis were also investigated, and preliminary suggestions for its integrated management are proposed

Demography and Dispersal Ability of a Threatened Saproxylic Beetle: A Mark-Recapture Study of the Rosalia Longicorn (Rosalia alpina)

The Rosalia longicorn or Alpine longhorn (Coleoptera: Cerambycidae) is an endangered and strictly protected icon of European saproxylic biodiversity. Despite its popularity, lack of information on its demography and mobility may compromise adoption of suitable conservation strategies. The beetle experienced marked retreat from NW part of its range; its single population survives N of the Alps and W of the Carpathians. The population inhabits several small patches of old beech forest on hill-tops of the Ralska Upland, Czech Republic. We performed mark-recapture study of the population and assessed its distribution pattern. Our results demonstrate the high mobility of the beetle, including dispersal between hills (up to 1.6 km). The system is thus interconnected; it contained ∼2000 adult beetles in 2008. Estimated population densities were high, ranging between 42 and 84 adult beetles/hectare a year. The population survives at a former military-training ground despite long-term isolation and low cover of mature beech forest (∼1%). Its survival could be attributed to lack of forestry activities between the 1950s and 1990s, slow succession preventing canopy closure and undergrowth expansion, and probably also to the distribution of habitat patches on conspicuous hill-tops. In order to increase chances of the population for long term survival, we propose to stop clear-cuts of old beech forests, increase semi-open beech woodlands in areas currently covered by conifer plantations and active habitat management at inhabited sites and their wider environs

Agrilus sumatrae Obenberger

Agrilus sumatrae Obenberger sumatrae Obenberger, 1922: 179 –180 (Agrilus) Type material. Agrilus sumatrae Obenberger, 1922. Primary: Lectotype by present designation, 3, (NMPC): “Corporaal Brastagi 5-1918 [h] \ TYPUS [p] [red label] \ Agrilus sumatrae m. Type [h] Det. Dr. Obenberger [p]”. Secondary: 1 PLT (NMPC). Described from unspecified number of syntypes.Published as part of Jendek, Eduard, 2012, Studies in the Palaearctic and Oriental Agrilus (Coleoptera, Buprestidae) IV, pp. 1-19 in Zootaxa 3300 on page 15, DOI: 10.11646/zootaxa.3300.1.1, http://zenodo.org/record/28093

Agrilus trevori Baudon

Agrilus trevori Baudon trevori Baudon, 1968: 134, 159–160 (Agrilus) Type material. Agrilus trevori Baudon, 1968. Primary: Lectotype by present designation, 3, (MHNB): “Phonthiou 1.iv. [19] 64 [h] Laos (Baudon) [p] \ Type [p] [red label] \ Agrilus trevori mihi [h] A. Baudon det. [p] [blue label]”. Secondary: 1 PLT (MHNB). Described from unspecified number of syntypes.Published as part of Jendek, Eduard, 2012, Studies in the Palaearctic and Oriental Agrilus (Coleoptera, Buprestidae) IV, pp. 1-19 in Zootaxa 3300 on page 16, DOI: 10.11646/zootaxa.3300.1.1, http://zenodo.org/record/28093

Agrilus tsacasi Descarpentries & Villiers

Agrilus tsacasi Descarpentries & Villiers tsacasi Descarpentries & Villiers, 1963 a: 3, 12 (Agrilus) = legrosi Descarpentries & Villiers, 1963 a: 3, 12 (Agrilus) syn. nov. Type material. Agrilus tsacasi Descarpentries & Villiers, 1963. Primary: Holotype, Ƥ, (MNHN): “Muséum Paris Tonkin Rég De Hoa Binh A. De Cooman 1928 [p] \ Agrilus tsacasi n. sp. Holotype Ƥ nob. A. Descarpentries et [h] A. Villiers det. 19 [p] 63 [h] \ Type [p] [red label]”. Described from 1 specimen. Agrilus legrosi Descarpentries & Villiers, 1963. Primary: Holotype, Ƥ, (MNHN): “ Hoa Binh Tonkin de Cooman [h] \ Type [p] [red label] \ Agrilus legrosi n. sp. Holotype nob. A. Descarpentries et [h] A. Villiers det. 19 [p] 63 [h] ”. Described from 1 specimen.Published as part of Jendek, Eduard, 2012, Studies in the Palaearctic and Oriental Agrilus (Coleoptera, Buprestidae) IV, pp. 1-19 in Zootaxa 3300 on page 16, DOI: 10.11646/zootaxa.3300.1.1, http://zenodo.org/record/28093

Testing of the steering column modules

Předkládaná bakalářská práce se zabývá automobilovými sběrnicemi. V první části jsou vysvětleny základní principy komunikace jednotlivých sběrnic, jejich fyzické vrstvy a linkové vrstvy. Druhá část bakalářské práce se zaměřuje na praktickou ukázku komunikace skrze CAN sběrnici. Cílem je vytvořit zařízení pro posílání jednoduché zprávy na sběrnici a příjímání zprávy od jiné jednotky. V práci je popsán postup při návrhu hardware, na kterém je prováděno měření. Následně jsou vysvětleny úkony pro softwarové nastavení CAN komunikace, které je třeba splnit pro správnou funkčnost. V závěru je zhodnocení dosažených výsledků.ObhájenoThe bachelor thesis deals with automotive buses. The basic principles of communication of specific buses, their physical and line layers are explained in firts part. The second part of bachelor thesis is focused on practical demonstration of communication through the CAN bus. The goal is to create a device for sending a simple message to the bus and receive a message from another CAN unit. The design of hardware what was used for measurements is described step by step. Subsequently, the CAN communication software settings are explained. There is described what must be fulfilled for proper functionality. The results are evaluated in final part of bachelor thesis

Agrilus biguttatus Fabricius 1777

<i>Agrilus biguttatus</i> (Fabricius, 1777) <p> <i>biguttatus</i> Fabricius, 1777: 237. (<i>Buprestis biguttata</i>)</p> <p>The redescription of the female “metatype” (lectotype?) from the HMUG was published by Staig (1940: 78­84). Furthermore, there are five type specimens (syntypes?, paralectotypes?) of this taxon preserved in ZMUK (Zimsen 1964: 156). Nomenclatural problems pertaining to priority and validity of this name were treated by Silfverberg (1977: 92).</p> <p>Type locality: “Habitat in Anglia ”.</p> <p> <b>available synonyms</b></p> <p> ­ <i>pannonicus</i> Piller & Mitterpacher, 1783 ­ <i>subfasciatus</i> Ménétriés, 1832 ­ <i>morosus</i> Gory & Laporte, 1837</p> <p> <b>unavailable synonyms</b></p> <p> ­ <i>aenescens</i> Schilsky, 1888 ­ <i>coerulescens</i> Schilsky, 1888 ­ <i>hiemalis</i> Obenberger, 1917 ­ <i>cepelaki</i> Roubal, 1927</p> <p> ­ <i>violascens</i> Théry, 1928</p> <p> ­ <i>kabylianus</i> Méquignon, 1928 ­ <i>bicolor</i> Fleischer, 1930</p> <p> ­ <i>eumelas</i> Obenberger, 1934</p>Published as part of <i>Jendek, Eduard, 2002, Nomenclatural and taxonomic notes on Agrilus ater (Linné), A. biguttatus (Fabricius) and A. subauratus Gebler (Coleoptera: Buprestidae: Agrilinae), pp. 1-12 in Zootaxa 120</i> on page 4, DOI: <a href="http://zenodo.org/record/155925">10.5281/zenodo.155925</a&gt