1. Isometric contraction kinetics and force-velocity relations were examined in wing muscles of two tettigoniid insects, Neoconocephalus robustus and N. triops. The muscles were first tergocoxal muscles of the mesothoracic and metathoracic segments. The metathoracic muscle is a flight muscle. The mesothoracic muscle is used in flight and in stridulation. 2. In the field, the wing stroke frequen...

Shallow brackish water habitats are characterized by highly unstable environmental conditions, which result in low species diversity. We performed our research the Vistula Lagoon three seasons years 2019–2021. This lagoon is extremely variable and covered period of hydro-technical works before opening canal through Spit, could be an additional stress factor. The aim study was to present particu...

Abstract We report the finding of two partial specimens Cryptolepas rhachianecti (Cirripedia, Coronulidae), a coronulid barnacle known only to inhabit skin gray whales ( Eschrichtius robustus ), in Pleistocene-aged sediments from Canoa Basin, Ecuador. While historical range includes North Pacific and Atlantic, our knowledge this is first inferred evidence whale population having resided within ...

Background: An external quality assessment on the identification of triatomines within laboratory network in state Rondônia. Methods: Seven laboratories participated this evaluation. Each was provided with support materials and nine insects from Hemiptera order for identification. Results: All samples were accurately identified at species level. However, correct sex achieved only 79% samples. T...

Male canaries that have reached sexual maturity can, in subsequent years, learn new song repertoires. Two telencephalic song control nuclei, the hyperstriatum ventrale, pars caudale, and nucleus robustus archistriatalis are, respectively, 99 and 76 percent larger in the spring, when male canaries are producing stable adult song, than in the fall, at the end of the molt and after several months ...

Five new species of the family Pterolichidae are described from two common non-parasitic cuckoo species of the subfamily Crotophaginae (Cuculiformes: Cuculidae) in Brazil: Aniacarus ani sp. n. from the Smooth-billed Ani, Crotophaga ani Linnaeus, A. simplex sp. n., A. robustus sp. n., A. coronatus sp. n. and Aniibius guirae sp. n. from the Guira Cuckoo, Guira guira (Gmelin). A key to all known s...

Material belonging to the genus Austrelmis Brown, from different localities from northwestern Argentina, is studied and described. Five new species are described and illustrated from adults of both sexes: Austrelmis argentinensis sp. nov., A. catamarcensis sp. nov., A. talampayensis sp. nov., A. tafi sp. nov. and A. robustus sp.nov. The new species are compared to other known species of the gen...

Echinops L., es un género de Asteraceae y contiene ca. 76 especies en Irán. La investigación actual se basa seis nueve poblaciones, incluidas E. cephalotus, chorassanicus, elebursessis, leiopolycerus, ritroides robustus. frecuencia distribución quiasmas, la asociación cromosómica segregación han sido analizadas para caracteres meióticos. En las estudiadas observado irregularidades meióticas, cr...