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Sem Morphology and Embryology of Laevides Symmetricus (Nygolaimina: Nygolaimidae)

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For more content, see Nematology.

SEM observations were made on the morphology of the nygolaim, Laevides symmetricus Khan et al., 1990 and its embryonic development was studied. The cuticle is marked with fine transverse striations, lips are amalgamated with an asteroid oral aperture and the papillae arranged in a 6 + 10 pattern. Mural tooth with slit-like laterodorsal aperture. Ventromedian supplements 6-8, irregularly spaced; deep transverse grooves present just anterior and posterior to each supplement. Eggs are mamillate and the first three cleavages are all transverse with the resulting blastomeres arranged in tandem. Embryonic development was completed in 86-111 h after egg laying.

Affiliations: 1: Section of Nematology, Department of Zoology, Aligarh Muslim University, Aligarh 202002, India


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