{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T06:48:47Z","timestamp":1791787727954,"version":"4.3.4"},"reference-count":18,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T00:00:00Z","timestamp":1791763200000},"content-version":"unspecified","delay-in-days":284,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Helminthol."],"published-print":{"date-parts":[[2026]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Female nematodes were collected from the intestines of a road-killed Yucatan Neotropical rattlesnake,\n                    <jats:italic>Crotalus tzabcan<\/jats:italic>\n                    , in Yucatan, Mexico. Morphometric analysis of the nematode specimens allowed their identification to the genus\n                    <jats:italic>Kalicephalus.<\/jats:italic>\n                    However, the absence of male specimens prevented species-level identification. Notably, second- and third-stage larvae were observed in the reproductive tract of some\n                    <jats:italic>Kalicephalus<\/jats:italic>\n                    females. Additionally, the internal transcribed spacer (ITS) region, the cytochrome c oxidase subunit 1 (COI) gene, and the 28S rRNA gene (28S) were amplified and sequenced. Pairwise genetic distances between the\n                    <jats:italic>Kalicephalus<\/jats:italic>\n                    sp. sequences from\n                    <jats:italic>C. tzabcan<\/jats:italic>\n                    and those of other\n                    <jats:italic>Kalicephalus<\/jats:italic>\n                    species were calculated for the three molecular markers. In the phylogenetic tree (ITS1) of Ancylostomatina, the sequences of\n                    <jats:italic>Kalicephalus<\/jats:italic>\n                    sp. were clustered with\n                    <jats:italic>Kalicephalus viperae<\/jats:italic>\n                    from Iran with high support. This study reports, for the first time, the genus\n                    <jats:italic>Kalicephalus<\/jats:italic>\n                    in\n                    <jats:italic>C. tzabcan<\/jats:italic>\n                    , and the presence of larvae in the reproductive tract of\n                    <jats:italic>Kalicephalus<\/jats:italic>\n                    females naturally parasitising a snake.\n                  <\/jats:p>","DOI":"10.1017\/s0022149x26102259","type":"journal-article","created":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T06:35:14Z","timestamp":1791786914000},"source":"Crossref","is-referenced-by-count":0,"title":["Morphological and molecular identification of\n                    <i>Kalicephalus<\/i>\n                    sp. in the Yucatan Neotropical rattlesnake\n                    <i>Crotalus tzabcan<\/i>\n                    in Yucatan, Mexico"],"prefix":"10.1017","volume":"100","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1669-5727","authenticated-orcid":false,"given":"J.A.","family":"Panti-May","sequence":"first","affiliation":[{"name":"Universidad Aut\u00f3noma de Yucat\u00e1n"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-5454-4208","authenticated-orcid":false,"given":"S.M.","family":"Panti-Dzib","sequence":"additional","affiliation":[{"name":"Universidad Aut\u00f3noma de Yucat\u00e1n"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Servi\u00e1n","sequence":"additional","affiliation":[{"name":"Instituto Nacional de Parasitolog\u00eda"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2026,10,12]]},"reference":[{"key":"S0022149X26102259_r15","volume-title":"Estudio taxon\u00f3mico de algunos nematodos par\u00e1sitos de reptiles de M\u00e9xico","author":"del Prado Vera","year":"1971"},{"key":"S0022149X26102259_r18","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-7519(98)00150-7"},{"key":"S0022149X26102259_r14","doi-asserted-by":"publisher","DOI":"10.1017\/S0022149X18000597"},{"key":"S0022149X26102259_r16","doi-asserted-by":"publisher","DOI":"10.1139\/z56-047"},{"key":"S0022149X26102259_r1","first-page":"123","article-title":"Survival and propagation of Kalicephalus willeyi in vitro","volume":"28","author":"Ahmed","year":"1967","journal-title":"Rivista di Parassitologia"},{"key":"S0022149X26102259_r2","doi-asserted-by":"publisher","DOI":"10.1079\/9780851994215.0000"},{"key":"S0022149X26102259_r5","doi-asserted-by":"publisher","DOI":"10.56557\/upjoz\/2025\/v46i165201"},{"key":"S0022149X26102259_r11","doi-asserted-by":"publisher","DOI":"10.1007\/s11230-017-9745-1"},{"key":"S0022149X26102259_r4","doi-asserted-by":"publisher","DOI":"10.1007\/s12639-018-1001-3"},{"key":"S0022149X26102259_r7","first-page":"294","article-title":"DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates","volume":"3","author":"Folmer","year":"1994","journal-title":"Molecular Marine Biology and Biotechnology"},{"key":"S0022149X26102259_r13","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-7519(03)00134-6"},{"key":"S0022149X26102259_r12","doi-asserted-by":"publisher","DOI":"10.1093\/bioinformatics\/bts199"},{"key":"S0022149X26102259_r6","doi-asserted-by":"publisher","DOI":"10.2307\/3223195"},{"key":"S0022149X26102259_r3","doi-asserted-by":"publisher","DOI":"10.2994\/SAJH-D-17-00081.1"},{"key":"S0022149X26102259_r10","doi-asserted-by":"publisher","DOI":"10.1017\/S0022149X25100436"},{"key":"S0022149X26102259_r8","doi-asserted-by":"publisher","DOI":"10.1645\/GE-523R.1"},{"key":"S0022149X26102259_r9","doi-asserted-by":"publisher","DOI":"10.1894\/0038-4909-58.2.251"},{"key":"S0022149X26102259_r17","doi-asserted-by":"publisher","DOI":"10.1139\/z62-090"}],"container-title":["Journal of Helminthology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0022149X26102259","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T06:35:16Z","timestamp":1791786916000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0022149X26102259\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":18,"alternative-id":["S0022149X26102259"],"URL":"https:\/\/doi.org\/10.1017\/s0022149x26102259","relation":{},"ISSN":["0022-149X","1475-2697"],"issn-type":[{"value":"0022-149X","type":"print"},{"value":"1475-2697","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026]]},"article-number":"e105"}}