GLACIFLUVIÁLNÍ VÝPLAVOVÁ PLOŠINA U KOLNOVIC A JEJÍ SROVNÁNÍ S TERMINOGLACIÁLNÍMI KUŽELY MEZI SOKOLSKÝM HŘBETEM A ZLATOHORSKOU VRCHOVINOU U JESENÍKU

Glaciofluvial sediments at Kolnovice originated on an outwash plain running along the ice sheet front. Its material is variable from petrographical and provenance point of view, as it was deposited from various parts of a wide ice sheet front. This contrasts with petrologically monotonous deposits of terminoglacial fans in this area (Písečná and Javorná sites), which originate from one marginal lobe of the ice sheet. In addition, the material in terminoglacial fans comes from the direct surroundings of the sites having been transported only a short distance.

A new species of freshwater crab of the genus Microthelphusa (Brachyura: Pseudothelphusidae) from a remote isolated cloud forest on a tabletop mountain in western Guyana, South America

A new species of freshwater crab of the genus Microthelphusa Pretzmann, 1968, from Guyana, South America is described. Microthelphusa meansi, new species, was collected from a remote isolated cloud forest in the Wokomung Massif, a tabletop mountain (tepui) in western Guyana at over 1,000 m above sea level. The conspicuous horseshoe-like marginal lobe and the dome-like auxiliar cephalic lobe of the first gonopod clearly distinguish this species from all 12 congeners.