CRICONEMA TIDS FROM PERU WITH A DESCRIPTION OF OGMA ANDENSE SP. N.

Abstract

Soil samples collected in the Peruvian highlands and forests tram natural habitats and cultivated fields in 1987, yielded five species of Criconematidae. One of them is described as a new species belonging to the genus Ogma Southern, 1914. Ogma andense sp. n. is closely related to O. decalineatum (Chitwood, 1957), Andrassy, 1979, distinguished mainly by the shorter stylet 45-50 µm vs. 66-86µm. The original and subsequent descriptions of Criconema (Nothocriconema) mutabile (Taylor, 1936) De Grisse et Loof 1965; Mesocriconema peruensiforme (De Grisse, 1967) Loof et De Grisse, 1989; Discocriconemella replecta Pinochet et Raski, 1976 and Hemicriconemoides mangiferae Siddiqi, 1961 are amplified and supplemented with light microscope and scanning electron microscope illustrations. The morphometricaI descriptive characteristics of the Peruvian populations extend the known range of variability far these species.