{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T00:59:57Z","timestamp":1775523597524,"version":"3.50.1"},"reference-count":0,"publisher":"Magnolia Press","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Zootaxa"],"abstract":"<jats:p>This study describes, on morphological and molecular grounds, Amiculucestus bonasus sp. nov., a parasite of the cownose ray Rhinoptera bonasus from the Western Atlantic. The new species is assigned to Amiculucestus Jensen &amp; Caira, 2022 based on the presence of key diagnostic features such as protandry, presence of an inverted J-shaped cirrus sac, and absence of a seminal receptacle. It can be distinguished from all four other valid species of this genus (i.e., A. calli Jensen &amp; Caira, 2022; A. australiensis Jensen &amp; Caira, 2022; A. herzogae Jensen &amp; Caira, 2022; and A. penghuensis Jensen &amp; Caira, 2022) by the width of the terminal female-mature proglottid, gravid proglottid and ovary, and the combination of other morphometric attributes, such as number of testes, width of the terminal male-mature proglottid and posterior-most immature proglottid, and length of the gravid strobila and ovarian lobe. Phylogenetic analyses of the D1\u2013D3 region of the 28S rDNA gene provide molecular evidence supporting its status as a new species of Amiculucestus. Amiculucestus bonasus sp. nov. is the fifth valid species of this genus and the first identified in the Southwestern Atlantic. \n\u00a0<\/jats:p>","DOI":"10.11646\/zootaxa.5787.2.2","type":"journal-article","created":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T00:14:33Z","timestamp":1775520873000},"page":"238-254","source":"Crossref","is-referenced-by-count":0,"title":["A new species of Amiculucestus (Eucestoda: Lecanicephalidea: Eniochobothriidae) from the cownose ray, Rhinoptera bonasus (Myliobatiformes: Rhinopteridae) in the Western Atlantic"],"prefix":"10.11646","volume":"5787","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6077-4663","authenticated-orcid":false,"given":"ALEX L.","family":"QUADROS","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"4913","published-online":{"date-parts":[[2026,4,7]]},"container-title":["Zootaxa"],"original-title":[],"link":[{"URL":"https:\/\/mapress.com\/zt\/article\/download\/zootaxa.5787.2.2\/58750","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/mapress.com\/zt\/article\/download\/zootaxa.5787.2.2\/58750","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T00:14:33Z","timestamp":1775520873000},"score":1,"resource":{"primary":{"URL":"https:\/\/mapress.com\/zt\/article\/view\/zootaxa.5787.2.2"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,4,7]]},"references-count":0,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2026,4,7]]}},"URL":"https:\/\/doi.org\/10.11646\/zootaxa.5787.2.2","relation":{},"ISSN":["1175-5334","1175-5326"],"issn-type":[{"value":"1175-5334","type":"electronic"},{"value":"1175-5326","type":"print"}],"subject":[],"published":{"date-parts":[[2026,4,7]]}}}