Auswahl der wissenschaftlichen Literatur zum Thema „Coleoptera : Clavicornia“

New Species ofStilbus(Coleoptera, Clavicornia, Phalacridae) from the Late Eocene Rovno AmberThe first Eocene species ofStilbusSeidlitz, 1872,S. bedovoyiLyubarsky et Perkovsky, sp. n., is described from Late Eocene Rovno amber.S. bedovoyiis most similar toStilbus atomarius(Linnaeus) and differs from it by smaller body size, strong and large punctation of elytra, and broadly oval apex of elytra.

The First Eocene Species of the GenusMicrambe(Coleoptera, Clavicornia, Cryptophagidae)Based on a fossil specimen from the Late Eocene Rovno amber (Ukraine),Micrambe sarnensisLyubarsky et Perkovsky, sp. n., the first Eocene species of this genus is described. The new species is similar to the extantMicrambe abietis(Paykull) andM. ulicis(Stephens), differing by having the callosity with an acutangular caudolateral corner.

The First Eocene Species of the GenusCryptophagus(Coleoptera, Clavicornia, Cryptophagidae)Based on a fossil specimen from the Late Eocene Rovno amber (Ukraine),Cryptophagus harenusLyubarsky et Perkovsky, sp. n., an Eocene species of this genus is described. The new species is similar to the extant desert speciesCryptophagus desertusLyubarsky andC. recticollisSolsky, differing by the large callosity occupying 1/4 length of lateral margin of pronotum.

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CAPES
Em estudo realizado acerca dos Elmidae na seção de primeira ordem de um rio da Floresta da Tijuca, Rio de Janeiro, RJ, foram retiradas amostras aleatórias de quatro substratos: folhiço depositado em áreas de remanso, pedras, folhiço retido em áreas de correnteza e areia, em cada estação do ano. Foi coligido um total de 1542 indivíduos, sendo 246 adultos e 1296 larvas, distribuídos em 7 espécies: Austrolimnius laevigatus (Grouvelle, 1889), Cylloepus sp., Gonielmis sp., Heterelmis sp., Macrelmis sp., Neoelmis sp. e Phanocerus clavicornis Sharp, 1882. Todos os táxons foram redescritos. Características pertinentes ao reconhecimento dos táxons foram ilustradas. O gênero Gonielmis está sendo registrado pela primeira vez no Brasil. O substrato mais habitado foi o fo1hiço retido em áreas de correnteza e a estação com maior frequência foi o inverno. Com base nos dados de frequência e biomassa de cada espécie, inferiu-se alguns aspectos do ciclo de vida. Através desses dados foram separados dois grupos estratégicos. O primeiro grupo apresenta larvas menores predominando no verão e adultos no inverno. O segundo grupo apresenta adultos predominando no verão e larvas menores no inverno. Os fatores que provavelmente estão influenciando na distribuição espaço-temporal desses grupos são a temperatura e a flutuação do nível das água.
ln a study carried out on Elmidae in a first order stream at Tijuca Forest, Rio de Janeiro, RJ (Brazil), samples were taken from four substrate types: litter from pools, hard rocks, sand and litter from riffles. A total of 1542 individuals, being 246 adults and 1296 larvae, of 7 species: Austrolimnius laevigatus (Grouvelle, 1889), Cylloepus sp., Gonielmis sp., Heterelmis sp., Macrelmis sp., Neoelmis sp. and Phanocerus clavicornis Sharp, 1882. All taxa were redescribed. Pertinent characters for recognition of the various taxa are illustrated. Litter from riffles showed the highest abundance per substrate and winter presented the highest abundances among seasons. Gonielmis is for the first time reported to Brazil. Based on the biomass of the most abundant species, two life cycle patterns were found. Heterelmis sp. presented smaller larvae predominating in summer and later instars appearing in winter. On the other hand, Phanocerus clavicornis presented the later instars appearing in summer and smaller larvae in winter. Apparently the main environmental variables affecting Elmidae spatial and temporal distribution were temperature and water level.