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Studies on the genus Axonchium Cobb. 1920 from India



Studies on the genus Axonchium Cobb. 1920 from India



Nematologica, 281: 21-33



Three new species of Axonchium, one each belonging to the subgenera Axonchium, Epaxonchium and SPICULAXONCHIUM subgen. nov. are described from India. The new subgenus Spiculaxonchium is similar to the subgenera Metaxonchium and Epaxonchium but differs from both in the shape of spicules and in having very weakly developed lateral guiding pieces and ventromedian supplements. A. (Spiculaxonchium) spiculum sp. nov. (L = 1.65-1.88 mm, V = 52-54) L = length is similar to A. (M.) vaginatum and A. (M.) leptocephalum. A. (Axonchium) vallum sp. nov. (L = 1.59-1.95 mm, V = 52-59, odontostyle = 10-12 .mu.m, odontophore = 13-14 .mu.m, spicules = 55-57 .mu.m) has only 1-3 ventromedian supplements and is similar to A. (A.) siddiqii and A. (A.) shamimi. A. (Epaxonchium) tacitum sp. nov. (L = 1.76-1.96 mm; V = 55-57, odontostyle = 10-12 .mu.m, odontophore = 15-16 .mu.m, spicules = 52-57 .mu.m, ventromedian supplements = 7-9) is similar to A. (E.) valvulatum. Males of A. (A.) shamimi and A. (M.) vaginatum are reported for the 1st time. The latter species, originally described from a single female, is redescribed.

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Accession: 021819167

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DOI: 10.1163/187529282X00484


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