In the New World, beetles of the primarily tropical family Passalidae occur in rotting wood from southern Michigan and southern Ontario to northern Argentina, Paraguay, Uruguay, and southern Brazil. They are found in the West Indies, Isla del Coco, and Galapagos Islands. They are not known from the forests of southern Chile or the Pacific North-West, except for the only known fossil of the fami...

Brazilian cave diversity, especially of invertebrates, is poorly known. The Bodoquena Plateau, which is located in the Cerrado Biome in central Brazil, has approximately 200 recorded caves with a rich system of subterranean water resources and high troglobitic diversity. Herein we describe a new troglobitic species of Girardia that represents the first obligate cave-dwelling species of the subo...

Coarazuphium caatinga sp. n. occurs in limestone caves located in Campo Formoso municipality, in the Brazilian Caatinga (Bahia, Brazil). The new species is close to C. formoso although they are morphologically distinct by the elytra sinuosity, which is more pronounced in C. caatinga; the aedeagus is more tapered at the tip in this last species. Important traits found in C. caatinga are the vari...

Eogenetic karst lies geographically and temporally close to the depositional environment of limestone in warm marine water at low latitude, in areas marked by midafternoon thunderstorms during a summer rainy season. Spring hydrographs from such an environment in north-central Florida are characterized by smooth, months-long, seasonal maxima. The passage of Hurricanes Frances and Jeanne in Septe...

The majority of caves are formed within limestone rock and hence our understanding of cave microbiology comes from carbonate-buffered systems. In this paper, we describe the microbial diversity of Roraima Sur Cave (RSC), an orthoquartzite (SiO4) cave within Roraima Tepui, Venezuela. The cave contains a high level of microbial activity when compared with other cave systems, as determined by an A...

Abstract Wediombo and its surrounding area is an isolated highland at the southern rim of Gunung Sewu sub-zone. This has contact between old volcanic rock with limestone that cave system underground-hydrological condition. study aims to determine morphological characteristics area. data was collected by observation mapping using BCRA 5C grade. Data analysis carried out passage morphometric morp...

Batu Caves hill is typical of karst hills in Peninsular Malaysia due to its small size and high biodiversity. It harbours 366 vascular plant species that represent about 25% the Peninsula’s limestone flora. Five are endemic 23 threatened species. This biodiversity result many microhabitats, each with their own assemblages Threats especially severe as area surrounded by urbanisation encroaches f...

There are a large number of karst caves in the limestone rock strata mining area, and water seriously restricts safe efficient recovery coal resources. In order to reveal influence law on evolution water-conducting fissures seam mining, numerical simulation method UDEC software is employed analyze development characteristics under conditions different sizes. By comparing analyzing overlying dis...

When water from the surface, e.g. from a lake, fl ows down through porous carbonate rocks, through a region with high hydraulic conductivity and encounters the water table of a phreatic aquifer, both waters mix by diffusion along their boundary. In a carbonate aquifer, where both surface and phreatic waters are saturated with respect to calcite, mixing corrosion causes renewed dissolution capac...