The ants of the genus Protalaridris are revised based upon their morphology. Seven species are recognized; the type species (P. armata Brown, 1980) and six species described as new: P. aculeata Lattke & Alpert, sp. n., P. arhuaca Guerrero, Lattke & Alpert, sp. n., P. bordoni Lattke, sp. n., P. leponcei Delsinne & Lattke, sp. n., P. loxanensis Lattke, sp. n., and P. punctata Lattke, sp. n. The genus is patchily distributed in mesic forested areas from western Panama to northern Venezuela and along the Andes to the Amazon watershed of southwestern Peru. The generic description is modified to accommodate a short-mandibulate species. Sporadic biological observations of one long-mandibulate species suggest they are sit-and-wait ambush predators that open their jaws to approximately 180° when stalking. All species are described and imaged, an identification key and a distribution map is provided. Comparing the mandibular morphology of long-mandibulate Protalaridris with other extant and extinct ants bearing elongate, dorsoanterior arching mandibles suggests the supposed mandibular apex in these taxa is actually a hypertrophied, preapical tooth and their supposed basal mandibular tooth is the main mandibular shaft., John E. Lattke, Thibaut Delsinne, Gary D. Alpert, Roberto J. Guerrero., and Obsahuje bibliografii
A new species of caligid copepod (Siphonostomatoida), Anuretes grandis sp. п., parasitic on the painted sweetlips [Diagrammapictum (Thunberg)] in Taiwan is described. The new species is distinguished from its congeners by having: (1) free margin of céphalothorax not covering fourth pediger, (2) large genital complex longer than 2/3 of the cephalic shield, (3) no maxillary whip, (4) leg 3 with 9 setae on the terminal segment of exopod and 8 plumose setae on the terminal segment of endopod, and (5) armature of I,III on leg 4 exopod. Genus Anuretes Heller, 1865 is reviewed and redefined. Based on the new diagnosis three species (A. chelatus Prahha et Pillai, A. fedderni Price and A. parvulus Wilson) were transferred to Pseudanureles, and two species (A.furcatus Capart and A. renalis Ileegaard) were transferred to Lepeophtheirus. In addition, the following three species of caligids were transferred to Anuretes: Lepeophtheirus fallolunulus Lewis, Heniochophilus indicus Pillai, and Lepeophtheirus rotundigenitalis Prabha et Pillai. The latter is renamed Anuretes occullus nom. n. due to the homonym encountered through this transfer. “Anuretes plectorhynchi Yamaguti” reported by Prabha and Pillai (1986) is renamed Anuretes similis sp. n. and Anuretes yamagutii Prabha et Pillai is relegated to the synonym of Anuretes anomalus Pillai. A key to the 18 species of Anuretes is provided.
V tomto příspěvku je popsáno využití mikroskopie založené na detekci atomárních sil (AFM) pro přípravu a pozorování nanostruktur vytvořených anodickou lokální oxidací na titanu. Je ukázáno, že v souladu s Cabrerovou-Mottovou teorií výška oxidových vrstev vytvořených pomocí AFM lineárně vzrůstá s napětím přiloženým mezi hrot a vzorek, zatímco rozměr pološířky tuto závislost nevykazuje. Dále je vynesena spojitost mezi výškou a pološířkou oxidových čar v závislosti na rychlosti pohybu hrotu po vzorku v průběhu oxidace. Rovněž je popsáno chování odporu tenkých vodivých kanálků vzhledem k jejich šířce., David Škoda, Filip Lopour, Radek Kalousek, David Burian, Jiří Spousta, Tomáš Šikola, František Matějka., and Obsahuje seznam literatury