{"title":"Metarhadinorhynchus lateolabracis 的分子系统学和基于类型材料的重新描述，以及 Metarhadinorhynchus、Indorhynchus 和 Neotegorhynchus（Acanthocephala: Palaeacanthocephala）的分类修订。","authors":"Yuki Kita, Masato Nitta, Hiroshi Kajihara","doi":"10.1007/s11686-024-00876-1","DOIUrl":null,"url":null,"abstract":"<div><h3>Purpose</h3><p>Molecular phylogenetics has been improving the acanthocephalan systematics, yet numerous taxa remain unexplored. The palaeacanthocephalan <i>Metarhadinorhynchus</i> Yamaguti, 1959 and its type species <i>M. lateolabracis</i> Yamaguti, 1959 are such to-be-explored taxa. We aim to refine (<i>i</i>) the systematic placement, (<i>ii</i>) the morphological circumscription, and (<i>iii</i>) the taxonomic components of the genus. We also aim to examine the taxonomic status of the species that have been assigned to the genus.</p><h3>Methods</h3><p>Morphological observations on newly collected specimens as well as the type material of <i>Metarhadinorhynchus lateolabracis</i> were conducted. Also, molecular phylogenetic analyses with maximum-likelihood method and Bayesian inference were performed based on freshly collected specimens. Nominal species that have at least once been assigned in <i>Metarhadinorhynchus</i>, as well as a related form, <i>Gorgorhynchus lateolabri</i> Yin and Wu, 1984, are taxonomically re-evaluated based on literature information.</p><h3>Results</h3><p>Our re-examination of the type material of <i>M</i>. <i>lateolabracis</i> revealed that the number of cement glands is six, instead of eight as described and illustrated in the original description. In the resulting phylogenetic tree, <i>M</i>. <i>lateolabracis</i> was nested in Isthmosacanthidae. <i>Gorgorhynchoides</i> Cable and Linderoth, 1963 was found to be a junior synonym of <i>Metarhadinorhynchus</i>. Taxonomic re-evaluations of six nominal species that have once belonged in <i>Metarhadinorhynchus</i> led to modifications of generic diagnoses for <i>Indorhynchus</i> Golvan, 1969 and <i>Neotegorhynchus</i> Lisitsyna, Xi, Orosová, Barčák, and Oros, 2022.</p><h3>Conclusions</h3><p><i>Metarhadinorhynchus</i> has been assigned to Leptorhynchoididae (Echinorhynchida), but our study now locates it in Isthmosacanthidae (Polymorphida). We propose 13 new combinations of specific names in <i>Metarhadinorhynchus</i> and three in <i>Indorhynchus</i>. <i>Metarhadinorhynchus lateolabri</i> (Yin and Wu, 1984) comb. nov. may be synonymous with <i>M. orientalis</i> (Wang, 1966) comb. nov.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"69 3","pages":"1411 - 1425"},"PeriodicalIF":1.2000,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Molecular Systematics and Type-material-based Redescription of Metarhadinorhynchus lateolabracis, With Taxonomic Revisions of Metarhadinorhynchus, Indorhynchus, and Neotegorhynchus (Acanthocephala: Palaeacanthocephala)\",\"authors\":\"Yuki Kita, Masato Nitta, Hiroshi Kajihara\",\"doi\":\"10.1007/s11686-024-00876-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Purpose</h3><p>Molecular phylogenetics has been improving the acanthocephalan systematics, yet numerous taxa remain unexplored. The palaeacanthocephalan <i>Metarhadinorhynchus</i> Yamaguti, 1959 and its type species <i>M. lateolabracis</i> Yamaguti, 1959 are such to-be-explored taxa. We aim to refine (<i>i</i>) the systematic placement, (<i>ii</i>) the morphological circumscription, and (<i>iii</i>) the taxonomic components of the genus. We also aim to examine the taxonomic status of the species that have been assigned to the genus.</p><h3>Methods</h3><p>Morphological observations on newly collected specimens as well as the type material of <i>Metarhadinorhynchus lateolabracis</i> were conducted. Also, molecular phylogenetic analyses with maximum-likelihood method and Bayesian inference were performed based on freshly collected specimens. Nominal species that have at least once been assigned in <i>Metarhadinorhynchus</i>, as well as a related form, <i>Gorgorhynchus lateolabri</i> Yin and Wu, 1984, are taxonomically re-evaluated based on literature information.</p><h3>Results</h3><p>Our re-examination of the type material of <i>M</i>. <i>lateolabracis</i> revealed that the number of cement glands is six, instead of eight as described and illustrated in the original description. In the resulting phylogenetic tree, <i>M</i>. <i>lateolabracis</i> was nested in Isthmosacanthidae. <i>Gorgorhynchoides</i> Cable and Linderoth, 1963 was found to be a junior synonym of <i>Metarhadinorhynchus</i>. Taxonomic re-evaluations of six nominal species that have once belonged in <i>Metarhadinorhynchus</i> led to modifications of generic diagnoses for <i>Indorhynchus</i> Golvan, 1969 and <i>Neotegorhynchus</i> Lisitsyna, Xi, Orosová, Barčák, and Oros, 2022.</p><h3>Conclusions</h3><p><i>Metarhadinorhynchus</i> has been assigned to Leptorhynchoididae (Echinorhynchida), but our study now locates it in Isthmosacanthidae (Polymorphida). We propose 13 new combinations of specific names in <i>Metarhadinorhynchus</i> and three in <i>Indorhynchus</i>. <i>Metarhadinorhynchus lateolabri</i> (Yin and Wu, 1984) comb. nov. may be synonymous with <i>M. orientalis</i> (Wang, 1966) comb. nov.</p></div>\",\"PeriodicalId\":6932,\"journal\":{\"name\":\"Acta Parasitologica\",\"volume\":\"69 3\",\"pages\":\"1411 - 1425\"},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2024-08-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Parasitologica\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11686-024-00876-1\",\"RegionNum\":3,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PARASITOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Parasitologica","FirstCategoryId":"3","ListUrlMain":"https://link.springer.com/article/10.1007/s11686-024-00876-1","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PARASITOLOGY","Score":null,"Total":0}
Molecular Systematics and Type-material-based Redescription of Metarhadinorhynchus lateolabracis, With Taxonomic Revisions of Metarhadinorhynchus, Indorhynchus, and Neotegorhynchus (Acanthocephala: Palaeacanthocephala)
Purpose
Molecular phylogenetics has been improving the acanthocephalan systematics, yet numerous taxa remain unexplored. The palaeacanthocephalan Metarhadinorhynchus Yamaguti, 1959 and its type species M. lateolabracis Yamaguti, 1959 are such to-be-explored taxa. We aim to refine (i) the systematic placement, (ii) the morphological circumscription, and (iii) the taxonomic components of the genus. We also aim to examine the taxonomic status of the species that have been assigned to the genus.
Methods
Morphological observations on newly collected specimens as well as the type material of Metarhadinorhynchus lateolabracis were conducted. Also, molecular phylogenetic analyses with maximum-likelihood method and Bayesian inference were performed based on freshly collected specimens. Nominal species that have at least once been assigned in Metarhadinorhynchus, as well as a related form, Gorgorhynchus lateolabri Yin and Wu, 1984, are taxonomically re-evaluated based on literature information.
Results
Our re-examination of the type material of M. lateolabracis revealed that the number of cement glands is six, instead of eight as described and illustrated in the original description. In the resulting phylogenetic tree, M. lateolabracis was nested in Isthmosacanthidae. Gorgorhynchoides Cable and Linderoth, 1963 was found to be a junior synonym of Metarhadinorhynchus. Taxonomic re-evaluations of six nominal species that have once belonged in Metarhadinorhynchus led to modifications of generic diagnoses for Indorhynchus Golvan, 1969 and Neotegorhynchus Lisitsyna, Xi, Orosová, Barčák, and Oros, 2022.
Conclusions
Metarhadinorhynchus has been assigned to Leptorhynchoididae (Echinorhynchida), but our study now locates it in Isthmosacanthidae (Polymorphida). We propose 13 new combinations of specific names in Metarhadinorhynchus and three in Indorhynchus. Metarhadinorhynchus lateolabri (Yin and Wu, 1984) comb. nov. may be synonymous with M. orientalis (Wang, 1966) comb. nov.
期刊介绍：
Acta Parasitologica is an international journal covering the latest advances in the subject.
Acta Parasitologica publishes original papers on all aspects of parasitology and host-parasite relationships, including the latest discoveries in biochemical and molecular biology of parasites, their physiology, morphology, taxonomy and ecology, as well as original research papers on immunology, pathology, and epidemiology of parasitic diseases in the context of medical, veterinary and biological sciences. The journal also publishes short research notes, invited review articles, book reviews.
The journal was founded in 1953 as "Acta Parasitologica Polonica" by the Polish Parasitological Society and since 1954 has been published by W. Stefanski Institute of Parasitology of the Polish Academy of Sciences in Warsaw. Since 1992 in has appeared as Acta Parasitologica in four issues per year.
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