A new genus, Tikuna, is described based on recent collections of adults and nymphs of Choroterpes atramentum Traver from western Costa Rica. All recent collections are from streams on or near the Nicoya Complex, the oldest geological formation in Lower Central America. Tikuna belongs to a lineage of South American Atalophlebiinae (Leptophlebiidae: Ephemeroptera) whose origin is hypothesized to have been in the late Cretaceous–early Tertiary. Some implications of the distribution of Tikuna for theories on the origin of Costa Rica’s biota are discussed.
Abstract
A new distribution map is provided for Xanthomonas gardneri (ex Sutic) Jones et al. Gammaproteobacteria: Xanthomonadales: Xanthomonadaceae. Hosts: tomato (Solanum lycopersicum) and pepper (Capsicum annuum). Information is given on the geographical distribution in Europe (Bulgaria and Russia), Asia (Malaysia), Africa (Ethiopia and Reunion), North America (Canada, British Columbia, Ontario, USA, Michigan, Ohio and Pennsylvania), Central America and Caribbean (Costa Rica) and South America (Brazil, Espirito Santo, Goias, Minas Gerais, Parana, Rio Grande do Sul and Santa Catarina).
Abstract
A new distribution map is provided for Mycena citricolor (Berk. & Curt.) Sacc. Hosts: Coffee (Coffea spp.) and others. Information is given on the geographical distribution in NORTH AMERICA, Mexico, USA (Florida), CENTRAL AMERICA & WEST INDIES, Costa Rica, Cuba, Dominica, Dominican Republic, Guadeloupe, Guatemala, Haiti, Honduras, Jamaica, Martiniq, caragua, Panama, Puerto Rico, Salvador, Trinidad, SOUTH AMERICA, Brazil, Bolivia, Colombia, Ecuador, French, Guiana, Guyana, Peru, Surinam, Venezuela.
Abstract
A new distribution map is provided for Typophorus nigritus (Fabricius) Coleoptera: Chrysomelidae, Eumolpinae. Attacks sweet-potato. Information is given on the geographical distribution in CENTRAL AMERICA and CARIBBEAN, Costa Rica, Cuba, Grenada, Grenadine Islands, Guatemala, Honduras, Mexico, Nicaragua, Panama, St. Vincent, Trinidad, SOUTH AMERICA, Argentina, Bolivia, Brazil, Colombia, Equador, French Guiana, Guyana, Paraguay, Peru, Uruguay, Venezuela.
Abstract
C. grandis is an element of lowland and riparian, semideciduous forests, occurring naturally from Mexico to South America. The species is usually 10-15 m high, and is very ornamental, especially due to its pink flowers which appear when the tree is partially defoliate and cover the entire crown. It is used in landscape design and urban arborization in tropical America, although in some cases its use is restricted due to the size of its fruits, which can reach 40-60 cm long. The species is recommended for live fences and revegetation in gallery forests in periodically flooded areas, but it is also adapted to a more or less pronounced dry season. C. grandis can be planted under direct sunlight in mixed tree systems, in fertile soils. The species has agroforestry potential for dry zones, especially in Central America, and is recommended for arborization of perennial crops and pastures, the fruits are highly appreciated by the cattle. C. grandis requires periodical pruning, however this may cause early decay and rot. The wood is used in construction, especially for carpentry, joinery, flooring, posts, beams, also for rustic furniture, tool handles, small bridges and boats. It is considered good for charcoal and fuelwood, and inadequate for cellulose and paper. In Central America, especially in Costa Rica, the membrane which surrounds the seeds is used as a substitute for chocolate, and is also used in many countries due to its medicinal properties. Researches have shown that extracts from this plant exhibit activity against the most common dermatophytes.
Abstract. Identification of spatial variation of lithology, as a function of position and scale, is very critical job for lithology modelling in industry. Wavelet Transform (WT) is an efficacious and powerful mathematical tool for time (position) and frequency (scale) localization. It has numerous advantages over Fourier Transform (FT) to obtain frequency and time information of a signal. Initially Continuous Wavelet Transform (CWT) is applied on gamma ray logs of two different Well sites (Well-1039 & Well-1043) of Costa Rica Convergent Margin, Central America for identifications of lithofacies distribution and fracture zone later Discrete Wavelet Transform (DWT) applied to DPHI log signals to show its efficiency in discriminating small changes along the rock matrix irrespective of the instantaneous magnitude to represent the fracture contribution from the total porosity recorded. Further the data of the appropriate depths partitioned using above mathematical tools are utilized separately for WBFA. As consequences of CWT operation it is found that there are four major sedimentary layers terminated with a concordant igneous intrusion passing through both the wells. In addition of WBFA analysis, it is clearly understanding that the fractal dimension value is persistent in first sedimentary layers and the last gabbroic sill intrusions. Inconsistent value of fractal dimension is attributed to fracture dominant in intermediate sedimentary layers it is also validate through core analysis. Fractal Dimension values suggest that the sedimentary environments persisting in that well locations bears abundant shale content and of low energy environments.
SEM and TEM Cross-section films Study of Chrysanthemum leucanthemum (Asteraceae) Pollen from Costa Rica
