Species with wide distribution, generally show variations in life history characteristics, which can be attributed to environmental causes. In this study, we analyzed the reproductive cycle and reproductive characteristics from three populations (Atlapexco, San Pablo Tetlapayac, and Santa Catarina) of the lizard Sceloporus variabilis from central Mexico. The specific goal of this study was to e...

Two new species of Anidiocerus from China, A. brevispinus Xue & Zhang sp. nov. and A. longimus Xue & Zhang sp. nov. are described and illustrated, and A. variabilis Maldonado-Capriles, 1976 is placed as a senior synonym of A. flavidus Cai & Shen, 1998, syn. nov. A redescription of the genus is provided together with a checklist and key for the separation of males. 

A new manoalide-related sesterterpene, 24-O-ethylmanoalide (3), was isolated from the Indian Ocean sponge Luffariella cf. variabilis, together with the known compounds manoalide (1), seco-manoalide, manoalide monoacetate and 24-O-methylmanoalide (2). The structure of compound 3 was elucidated by interpretation of its spectroscopic data.

Abstract The bee genera Callonychium Brethes, Psaenythia Gerstaecker and Anthrenoides Ducke are newly recorded in Piaui State, northeastern Brazil. species reported here brasilience (Ducke, 1907) variabilis Ducke, 1908, an as yet unidentified of Anthrenoides. Images all known distributional records these also provided. new occurrences herein expand the distribution range to Caatinga biome.

The characterisation of the causal agents postharvest diseases, as well their pathogenicity in different mango cultivars economic importance Mexico was evaluated. In total, 37 fungi were isolated from diseased (Mangifera indica L.) cvs Ataulfo, Hayden, Manila, Peach, Haden and creole. For morphological characterization, isolates seeded potato dextrose agar media described by 4 variables. molecu...

The role of leaf litter in hydrological processes and soil erosion of forest ecosystems is poorly understood. A field experiment was conducted under simulated rainfall in runoff plots with a slope of 10%. Two common types of litter in North China (from Quercus variabilis, representing broadleaf litter, and Pinus tabulaeformis, representing needle leaf litter), four amounts of litter, and five r...

Anabaena variabilis ATCC 29413 is a filamentous heterocystous cyanobacterium that fixes nitrogen under a variety of environmental conditions. Under aerobic growth conditions, nitrogen fixation depends upon differentiation of heterocysts and expression of either a Mo-dependent nitrogenase or a V-dependent nitrogenase in those specialized cells. Under anaerobic conditions, a second Mo-dependent n...