{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T22:57:14Z","timestamp":1773097034620,"version":"3.50.1"},"reference-count":33,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2010,11,19]],"date-time":"2010-11-19T00:00:00Z","timestamp":1290124800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Helminthol."],"published-print":{"date-parts":[[2011,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A new <jats:italic>Heterorhabditis<\/jats:italic> species of entomopathogenic nematode was isolated from soil of the Atacama Desert in Chile. The new species is characterized by morphometrics of the infective juvenile (IJ) with length (L)\u00a0=\u00a0611 (578\u2013666)\u00a0\u03bcm, head to excretory pore length (EP)\u00a0=\u00a0115 (101\u2013126)\u00a0\u03bcm, tail\u00a0=\u00a069 (62\u201379)\u00a0\u03bcm long, (EP\/tail)\u00a0\u00d7\u00a0100 (E%)\u00a0=\u00a0165 (149\u2013182) and L\/maximum body diameter (ratio <jats:italic>a<\/jats:italic>)\u00a0=\u00a028 (25\u201331). The male has spicules 45 (40\u201349)\u00a0\u03bcm long, gubernaculum 20 (17\u201322)\u00a0\u03bcm long and (spicule length\/anal body diameter)\u00a0\u00d7\u00a0100 (SW%)\u00a0=\u00a0205 (179\u2013249). The hermaphroditic adult has shallow cuticular folds immediately anterior and posterior to the vulva, a slight post-anal swelling and a finely rounded tail terminus. Morphologically, <jats:italic>H. atacamensis<\/jats:italic> n. sp. resembles <jats:italic>H. safricana<\/jats:italic>, <jats:italic>H. marelatus<\/jats:italic>, <jats:italic>H. downesi<\/jats:italic> and <jats:italic>H. amazonensis<\/jats:italic>, but can be distinguished by characters of adult and IJ stages. In particular, for adult males, <jats:italic>H. atacamensis<\/jats:italic> n. sp. differs from <jats:italic>H. amazonensis<\/jats:italic> by the number and orientation of the genital papillae and from <jats:italic>H. downesi<\/jats:italic> by the position of the excretory pore; by the shape of the female tail terminus from <jats:italic>H. downesi<\/jats:italic> and by the position of the IJ hemizonid from <jats:italic>H. marelatus<\/jats:italic>. <jats:italic>Heterorhabditis atacamensis<\/jats:italic> n. sp. is further characterized by internal transcribed spacer (ITS) and D2D3 rDNA sequences, the closest species, <jats:italic>H. safricana<\/jats:italic>, being separated by 13\u00a0bp across 730\u00a0bp of the ITS (incorporating ITS1 (partial sequence), 5.8S (complete sequence), ITS2 (complete sequence)) and 5\u00a0bp across 592\u00a0bp of the partial 28S (incorporating D2D3) sequence. The morphological and molecular data confirm that <jats:italic>H. atacamensis<\/jats:italic> n. sp. is a valid species.<\/jats:p>","DOI":"10.1017\/s0022149x10000702","type":"journal-article","created":{"date-parts":[[2010,11,19]],"date-time":"2010-11-19T10:16:13Z","timestamp":1290161773000},"page":"381-394","source":"Crossref","is-referenced-by-count":23,"title":["<i>Heterorhabditis atacamensis<\/i> n. sp. 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