Common Backswimmer Notonecta glauca (Linnaeus 1758) (Hemiptera: Notonectidae)

Checklist and distribution of the family Notonectidae in Romania, with the first record of Notonecta maculata Fabricius, 1794 (Hemiptera: Heteroptera: Nepomorpha).

Notonecta maculata Fabricius, 1794 is recorded for the first time from Romania. Five species belonging to the genus Notonecta Linnaeus, 1758 and one to the genus Anisops Spinola, 1837 are now recorded from this country. The occurrence of Anisops sardeus sardeus Herrich-Schaeffer, 1849 and N. meridionalis Poisson, 1923 is confirmed by additional records. A checklist of the Notonectidae of Romani...

A chromosomal analysis of Nepa cinerea Linnaeus, 1758 and Ranatra linearis (Linnaeus, 1758) (Heteroptera, Nepidae)

An account is given of the karyotypes and male meiosis of the Water Scorpion Nepa cinerea Linnaeus, 1758 and the Water Stick Insect Ranatra linearis (Linnaeus, 1758) (Heteroptera, Nepomorpha, Nepidae). A number of different approaches and techniques were tried: the employment of both male and female gonads and mid-guts as the sources of chromosomes, squash and air-drying methods for chromosome ...

Atlantic Salmon, Salmo salar Linnaeus, 1758

Species Recognition Influences Female Mate Preferences in the Common European Grasshopper (Chorthippus biguttulus Linnaeus, 1758)

Mate-choice preferences are responsible for the evolution of some of the most fascinating and conspicuous secondary sexual signals. Their evolution is generally explained by hypotheses assuming direct or indirect benefits of mate choice such as: (i) Fisherian self-reinforcement processes, (ii) indicator mechanisms (good genes hypothesis), or (iii) direct phenotypic benefits (for explanations, s...

Macroanatomical aspects of the gastrointestinal tract of the alpaca (Vicugna pacos Linnaeus, 1758) and dro- medary (Camelus dromedarius Linnaeus, 1758)

Although camelids and taxonomic ruminants share fundamental convergent properties, such as microbial fermentation and a sorting mechanism in the forestomach with a resulting high degree of digesta particle size reduction, there are important differences in the capacity to process high amounts of food. We describe qualitative and quantitative characteristics of the gastrointestinal anatomy of al...