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Helminthol."],"published-print":{"date-parts":[[2024]]},"abstract":"<jats:title>Abstract<\/jats:title>\n\t  <jats:p>Two new species of the genus <jats:italic>Sectonema<\/jats:italic> found in northern Iran are characterized, including morphological descriptions and molecular (18S-, 28S-rDNA) analyses. <jats:italic>Sectonema tehranense<\/jats:italic> sp. nov. is distinguished by its 7.22 \u2013 8.53 mm long body, lip region offset by constriction and 24 \u2013 31 \u03bcm wide with perioral lobes and abundant setae- or cilia-like projections covering the oral field, mural tooth 15.5 \u2013 17 \u03bcm long at its ventral side, neck 1091 \u2013 1478 \u03bcm long, pharyngeal expansion occupying 61 \u2013 71% of the total neck length, female genital system diovarian, uterus simple and 3.9 \u2013 4.2 times the corresponding body diameter long, transverse vulva (<jats:italic>V<\/jats:italic> = 49 \u2013 59), tail short and rounded (44 \u2013 65 \u03bcm, <jats:italic>c<\/jats:italic> = 99 \u2013 162, <jats:italic>c\u2019<\/jats:italic> = 0.6 \u2013 0.8), spicules 111 \u2013 127 \u03bcm long, and 7 \u2013 10 spaced ventromedian supplements with hiatus. <jats:italic>Sectonema noshahrense<\/jats:italic> sp. nov. displays a 4.07 \u2013 4.73 mm long body, lip region offset by constriction and 23 \u2013 25 \u03bcm wide with perioral lobes and abundant setae- or cilia-like projections covering the oral field, odontostyle 14 \u2013 14.5 \u03bcm long, neck 722 \u2013 822 \u03bcm long, pharyngeal expansion occupying 66 \u2013 68% of the total neck length, female genital system diovarian, uterus simple and 2.4 \u2013 2.7 times the corresponding body diameter long, transverse vulva (<jats:italic>V<\/jats:italic> = 54 \u2013 55), tail convex conoid (39 \u2013 47 \u03bcm, <jats:italic>c<\/jats:italic> = 91 \u2013 111, <jats:italic>c\u2019<\/jats:italic> = 0.8 \u2013 0.9), spicules 82 \u03bcm long, and seven spaced ventromedian supplements with hiatus. Molecular analyses confirm a maximally supported (<jats:italic>Epacrolaimus<\/jats:italic> + <jats:italic>Metaporcelaimus<\/jats:italic> + <jats:italic>Sectonema<\/jats:italic>) clade and a tentative biogeographical pattern, with sequences of Indolamayan taxa forming a clade separated from those of Palearctic ones. Parallel or convergent evolution processes might be involved in the phylogeny of the species currently classified under <jats:italic>Sectonema.<\/jats:italic> This genus is certainly more heterogeneous than previously assumed.<\/jats:p>","DOI":"10.1017\/s0022149x24000245","type":"journal-article","created":{"date-parts":[[2024,4,15]],"date-time":"2024-04-15T09:32:49Z","timestamp":1713173569000},"source":"Crossref","is-referenced-by-count":0,"title":["Two new species of the genus <i>Sectonema<\/i> Thorne, 1930 (Nematoda, Dorylaimida, Aporcelaimidae) from Iran, with new insights into its evolutionary relationships"],"prefix":"10.1017","volume":"98","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-0539-8886","authenticated-orcid":false,"given":"M.","family":"Keramat","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-3648-2484","authenticated-orcid":false,"given":"Z.","family":"Mahboubi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4510-7891","authenticated-orcid":false,"given":"M. R.","family":"Atighi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3665-1692","authenticated-orcid":false,"given":"E.","family":"Pourjam","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0256-876X","authenticated-orcid":false,"given":"P.","family":"Castillo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7640-507X","authenticated-orcid":false,"given":"M.","family":"Pedram","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1125-5490","authenticated-orcid":false,"given":"R.","family":"Pe\u00f1a-Santiago","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2024,4,15]]},"reference":[{"key":"S0022149X24000245_r3","first-page":"247","article-title":"N\u00e9matodes de la nappe phr\u00e9atique du r\u00e9seau fluvial de la Saale (Thuringe) et psammniques du Lac Stechlin (Brandebourg du nord)","volume":"6","author":"Altherr","year":"1968","journal-title":"Limnologica"},{"key":"S0022149X24000245_r7","first-page":"3","article-title":"Four large-sized species of the family Aporcelaimidae (Nematoda, Dorylaimida) with proposal of a new genus, Epacrolaimus gen. n","volume":"32","author":"Andr\u00e1ssy","year":"2000","journal-title":"Opuscula Zoologica Budapestinensis"},{"key":"S0022149X24000245_r16","first-page":"23","article-title":"Die Seen im Aela- und Tinzenhorngebiet II. 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