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Five New Species of Aphanolaimus (Nemata: Araeolaimida) With a Key To Species

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Five new species of Aphanolaimus de Man, 1880 are described, four from southern Chile as follows: A. yamani sp. n. characterized by length of male and female, slender neck region and long, slender tail, ovoid ventral gland, position of first and second lateral epidermal gland (leg) pores and beginning of lateral field: A. chilensis sp. n. distinguished by length of male and female, gradually and evenly narrowing neck, conoid tail, ovoid ventral gland, position of first and second leg pores and beginning of lateral field: A. elegans sp. n. distinguished by its large size, large, oval amphids slightly longer than wide, prominent cephalic setae 7-10 μm long, with H-shaped ventral gland: A. fuegoensis sp. n. distinctive by its large size, blunt head as wide or wider than long, large circular amphid with prominent circular projection in center surrounding a central depression, oval ventral gland and coarse annulation. The fifth species was collected in the Andaman Islands, India and is described as A. seshadrii sp. n. characterized by numerous longitudinal lines (<50/annulus), by its small size, cephalic setae 8 μm long and lateral field beginning very near head. Collections from Mendocino County and Lake Tahoe, both in California, held specimens that bridge most of the morphological characters and measurements of A. spiriferus Cobb, 1914 and A. cobbi Micoletzky, 1922 leading to the conclusion they are conspecific. A. spiriferus has priority by earlier publication and A. cobbi is designated a junior synonym as follows: A. spiriferus Cobb, 1914, syn. A. cobbi Micoletzky, 1922 syn. n. A review of A. communis Cobb, 1915 found it inadequately described, no illustrations were published and no type specimens extant. The description suggests communis may be a species of Paraphanolaimus. As a consequence of these doubtful characteristics it is proposed A. communis Cobb, 1915 be assigned to species inquirendae.

Affiliations: 1: Department of Nematology, University of California Davis, California 95616 and Instituut voor Dierkunde, K.L. Ledeganckstraat 35, 9000 Gent, Belgium


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