Elachistocleis skotogaster spec. nov. is described from the Andean Yungas of Argentina. It is unique in the genus in having belly and legs densely spotted with brown, an uniformly dark brown dorsal mottled with black, absence of a light vertebral strip, a fold behind the mouth but not a postcommisural gland. Its natural history and advertisement call are brie y noted. Elachistocleis ovalis and E. bicolor are considered different species, and Buenos Aires, Argentina, is established as type locality for the latter one.Resumen. Se describe Elachistocleis skotogaster n. sp. de las Yungas andinas de Argentina. Se diferencia de las restantes especies del género por presentar vientre y región inferior de los miembros posteriores densamente punteada de castaño, la región dorsal castaño oscuro, punteada en negro, sin banda vertebral clara, y el área por detrás de la boca con un pliegue pero sin glándula postcomisural. Elachistocleis ovalis y E. bicolor son consideradas especies diferentes y se establece Buenos Aires, Argentina, como localidad tipo de esta última. © Koninklijke Brill NV, Leiden, 2003 Amphibia-Reptilia 24: 269-284 Also available online -www.brill.nl 270 E.O. Lavilla, M. Vaira, L. Ferrari

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We propose the use of exfoliative cytology to monitor corrosion processes and for routine clinical follow up.

Electrical Conductivity (EC) is a promising vigor test since it produces fast laboratory results. In sunflower, the leakage of electrolytes from the pericarp may interfere with exudates from embryo tissues. The aims of this work were (1) To determine the utility of the EC test using dehulled (without pericap) sunflower seeds to evaluate the vigor in different genotypes, exposed to contrasting seed filling period and storage conditions, (2) To explore the relationship between EC and germination values near post harvest and across storage period and (3) To propose ranges of vigor through EC, so as to categorize sunflower seeds lots. Seeds of commercial hybrids differentiated by acid composition (high and standard oleic acid), exploring contrasting seed filling period and storage conditions, were evaluated by EC, Tetrazolium (TZ-V) and Germination (G), near post harvest time and during storage period (1, 5, 9, 13 and 19 months). An independent set of 18 genotypes, stored during 1-108 months, were also analyzed for EC and G. Electric conductivity in dehulled seeds was effective to identify vigor differences of genotypes in different seed filling period and storage conditions. A general relationship between the loss of germination and vigor was established for sunflower. The ranges of vigor based on EC proposed for sunflower seeds classification were <70 µs cmG 1 gG 1 for high, 70-110 µs cmG 1 gG 1 for intermediate and >110 µs cmG 1 gG 1 for low vigor levels. It is the first report based on EC ranges to categorize the seed vigor of sunflower seeds lots.

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