A revision of the Iponematinae (Nematoda: Drilonematoidea) with description of three new species parasitic in tropical earthworms

in Nematology
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Abstract

The Iponematinae is revised based on the morphological analysis of known and newly described species. Globocephalonema is restored to accommodate three former Iponema species: G. krishnanii, G. hyderabadense and G. timmae. Emended generic diagnoses and keys for species identification are proposed. Three new species, Filiponema javanicum sp. n., F. cylindropharyngatum sp. n. and Tonoscolecinema awakubianum sp. n., parasitic in earthworms deposited in the collection of the Museum für Naturkunde Berlin, are described and illustrated. Filiponema javanicum sp. n. is closest to F. sarmathicum but is distinguished by its smaller amphids, a cylindroid vs clavate pharynx, the absence of genital sensilla with rounded bases and short bristle in the centre, the lack of somatic sensilla in males, and a differently shaped gubernaculum. From the other three species of the genus, it clearly differs by a rounded vs pointed tail in both sexes. Filiponema cylindropharyngatum sp. n. differs from its congeners by the uniquely short and slim pharynx and fewer eggs with more elongated, finely tuberculate vs smooth, ovoid eggshells. Tonoscolecinema awakubianum sp. n. differs by the presence of a pre-corpal bulb-like pharyngeal swelling, a glandular pharyngeal bulb, a gradually tapering vs conical female tail and cuticularised rectum in females.

A revision of the Iponematinae (Nematoda: Drilonematoidea) with description of three new species parasitic in tropical earthworms

in Nematology

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