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A SCANNING ELECTRON MICROSCOPE STUDY OF SOME SPECIES OF TERRESTRIAL NEMATODES FROM SPITZBERGEN BY SVEN BOSTRÖM University of Stockholm, Department of Zoology, S-106 91 Stockholm, Sweden Three species of the family Cephalobidae and one species of the family Plectidae sampled on Spitzbergen were studied by scanning electron microscopy, which provided additional informa- tion on external morphology. Acrobeloides tricornis (Thorne, 1925) Thorne, 1937 was found to possess five incisures in the lateral field, rendering its differentiation from some other species of the genus less clear. The lip region morphology of Chiloplacus saccatus Loof, 1971 was found to be very similar to that of Acrobelophis minimus (Thorne, 1925) Andrássy, 1984 and the validity of the latter genus is discussed. Eucephalobus arcticus Loof, 1971 was found to possess cephalic and labial probolac and is proposed as a junior synonym of E. mucronatus (Kozlowska & Roguska- Wasilewska, 1963) Andrássy, 1967. The complex anterior structure of Ereptonema arcticum Loof, 1971 was compared with that of Tylocephalus auriculatus (Bütschli, 1873) Anderson, 1966. Keywords: morphology, taxonomy, Acrobeloides tricornis, Chiloplacus saccatus, Eucephalobus arcticus, Ereptonema arcticum. Loof (1971) described new species of nematodes from Spitzbergen and also made new records for many known species. Loof's (1971) survey
Nematologica – Brill
Published: Jan 1, 1987
Keywords: Eucephalobus arcticus; taxonomy; Ereptonema arcticum; Acrobeloides tricornis; morphology; Chiloplacus saccatus
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