The present paper comprises a systematic survey of trematodes found in 13 species of freshwater fishes in Venezuela collected in 1992, 1996 and 2001. The following 15 trematode species were recorded: Adults: Genarchella venezuelaensis sp. n., Thometrema dissimilis sp. n., Megacoelium spinicavum Thatcher et Varella, 1981, Doradamphistoma bacuense Thatcher, 1999, Crassicutis cichlasomae Manter, 1936, Parspina carapo Ostrowski de Núñez, Arredonto et Gil de Pertierra, 2011, Phyllodistomoides hoplerythrini sp. n. Larvae (metacercariae): Clinostomatopsis sorbens (Braun, 1899), Clinostomum marginatum (Rudolphi, 1819), C. detruncatum Braun, 1899, Ithyoclinostomum dimorphum (Diesing, 1850), Odhneriotrema microcephala (Travassos, 1922), Tylodelphys sp., Posthodiplostomum sp., Sphincterodiplostomum sp. All these parasites are reported from Venezuela for the first time and many of these findings represent new host records. The new species G. venezuelaensis sp. n., T. dissimilis sp. n. and P. hoplerythrini sp. n. were collected from the accessory respiratory organ of Loricariichthys brunneus (Hancock) (Loricariidae), from the stomach of Hoplerythrinus unitaeniatus (Spix et Agassiz) (Erythrinidae) and from the intestine of H. unitaeniatus, respectively. All parasites are briefly described and illustrated and problems concerning their morphology, taxonomy, hosts and geographical distribution are discussed. Megacoelium spinispecum Thatcher et Varella, 1981 is considered a junior synonym of M. spinicavum Thatcher et Varella, 1981, and Crassicutis opisthoseminis Bravo-Hollis et Arroyo, 1962 as a junior synonym of C. cichlasomae Manter, 1936.
本文对 1992 年、1996 年和 2001 年收集的委内瑞拉 13 种淡水鱼体内发现的吸虫进行了系统调查。记录了以下 15 种吸虫：成虫：n.、Thometrema dissimilis sp.n.、Megacoelium spinicavum Thatcher et Varella, 1981、Doradamphistoma bacuense Thatcher, 1999、Crassicutis cichlasomae Manter, 1936、Parspina carapo Ostrowski de Núñez, Arredonto et Gil de Pertierra, 2011、Phyllodistomoides hoplerythrini sp.n.幼虫（metacercariae）：Detruncatum Braun, 1899, Ithyoclinostomum dimorphum (Diesing, 1850), Odhneriotrema microcephala (Travassos, 1922), Tylodelphys sp、所有这些寄生虫都是首次在委内瑞拉发现，其中许多都是新的宿主记录。新种 G. venezuelaensis sp. n.、T. dissimilis sp. n.和 P. hoplerythrini sp. n.分别采集自 Loricariichthys brunneus (Hancock) （Loricariidae）的辅助呼吸器官、Hoplerythrinus unitaeniatus (Spix et Agassiz) （Erythrinidae）的胃和 H. unitaeniatus 的肠。对所有寄生虫都进行了简要描述和说明，并讨论了它们的形态、分类、宿主和地理分布等问题。Megacoelium spinispecum Thatcher et Varella, 1981 被认为是 M. spinicavum Thatcher et Varella, 1981 的小异名，Crassicutis opisthoseminis Bravoo-Hollis et Arroyo, 1962 被认为是 C. cichlasomae Manter, 1936 的小异名。
{"title":"Some trematodes including three new species from freshwater fishes of Venezuela.","authors":"F. Moravec, A. Prouza","doi":"10.14411/fp.2024.007","DOIUrl":"https://doi.org/10.14411/fp.2024.007","url":null,"abstract":"The present paper comprises a systematic survey of trematodes found in 13 species of freshwater fishes in Venezuela collected in 1992, 1996 and 2001. The following 15 trematode species were recorded: Adults: Genarchella venezuelaensis sp. n., Thometrema dissimilis sp. n., Megacoelium spinicavum Thatcher et Varella, 1981, Doradamphistoma bacuense Thatcher, 1999, Crassicutis cichlasomae Manter, 1936, Parspina carapo Ostrowski de Núñez, Arredonto et Gil de Pertierra, 2011, Phyllodistomoides hoplerythrini sp. n. Larvae (metacercariae): Clinostomatopsis sorbens (Braun, 1899), Clinostomum marginatum (Rudolphi, 1819), C. detruncatum Braun, 1899, Ithyoclinostomum dimorphum (Diesing, 1850), Odhneriotrema microcephala (Travassos, 1922), Tylodelphys sp., Posthodiplostomum sp., Sphincterodiplostomum sp. All these parasites are reported from Venezuela for the first time and many of these findings represent new host records. The new species G. venezuelaensis sp. n., T. dissimilis sp. n. and P. hoplerythrini sp. n. were collected from the accessory respiratory organ of Loricariichthys brunneus (Hancock) (Loricariidae), from the stomach of Hoplerythrinus unitaeniatus (Spix et Agassiz) (Erythrinidae) and from the intestine of H. unitaeniatus, respectively. All parasites are briefly described and illustrated and problems concerning their morphology, taxonomy, hosts and geographical distribution are discussed. Megacoelium spinispecum Thatcher et Varella, 1981 is considered a junior synonym of M. spinicavum Thatcher et Varella, 1981, and Crassicutis opisthoseminis Bravo-Hollis et Arroyo, 1962 as a junior synonym of C. cichlasomae Manter, 1936.","PeriodicalId":505605,"journal":{"name":"Folia Parasitologica","volume":"114 29","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140379390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Moravec, M. Bakenhaster, S. Seyoum, M. Tringali
Morphological data are used to describe a new nematode species, Heterocheilus floridensis sp. n. (Heterocheilidae) from the digestive tract of the Florida manatee Trichechus manatus latirostris (Harlan) (Trichechidae, Sirenia) from Florida, USA. Examination by light and scanning electron microscopy revealed that the new species differs from the related Heterocheilus tunicatus Diesing, 1839 mainly by having dentigerous ridges on the inner surface of the lips, a median unpaired papilla located anterior to the cloaca, and a considerably larger body size. Sequence data for subunits I and II of mitochondrial cytochrome oxidase gene, 18S small subunit and 28S ribosomal RNA genes were provided for molecular characterisation of the new species. However, the current unavailability of homologous sequence data for congeneric specimens precluded a molecular assessment of the morphological species hypothesis, and ascaridoid phylogenetic hypotheses could not be advanced. Specimens of Heterocheilus sp. collected from the Antillean manatee Trichechus manatus manatus Linnaeus in Puerto Rico, on loan from the US National Museum of Natural History, were morphologically consistent with the new species, so apparently all congeneric nematodes reported from both subspecies of the West Indian manatee Trichechus manatus Linnaeus and previously identified as H. tunicatus belong rather to H. floridensis sp. n. Heterocheilus hagenbecki (Khalil et Vogelsang, 1932) Sprent 1980 is here considered to be a species inquirenda. A key to valid species of Heterocheilus Diesing, 1839 is provided.
本文利用形态学数据描述了来自美国佛罗里达州的佛罗里达海牛Trichechus manatus latirostris (Harlan) (Trichechidae, Sirenia)消化道的线虫新物种Heterocheilus floridensis sp.光镜和扫描电子显微镜检查发现，该新物种与相关的 Heterocheilus tunicatus Diesing, 1839 的主要区别在于嘴唇内表面有齿状脊，泄殖腔前方有一个中间无配对的乳头，而且体型要大得多。该研究提供了线粒体细胞色素氧化酶基因 I 和 II 亚基、18S 小亚基和 28S 核糖体 RNA 基因的序列数据，以确定该新物种的分子特征。然而，由于目前无法获得同属标本的同源序列数据，因此无法对形态学上的物种假说进行分子评估，也无法提出蛔虫系统发育假说。从美国国立自然历史博物馆借来的从波多黎各的安的列斯海牛林尼厄斯（Trichechus manatus manatus Linnaeus）身上采集的 Heterocheilus sp.标本在形态上与新种一致，因此，从西印度海牛林尼厄斯（Trichechus manatus manatus Linnaeus）的两个亚种中报告的、以前被鉴定为 H. tunicatus 的所有同属线虫显然都属于 H. tunicatus。Heterocheilus hagenbecki (Khalil et Vogelsang, 1932) Sprent 1980 在这里被认为是一个种。提供了 Heterocheilus Diesing, 1839 的有效种的检索表。
{"title":"Heterocheilus floridensis sp. n. (Nematoda: Heterocheilidae) from the West Indian manatee Trichechus manatus (Trichechidae, Sirenia) in Florida, USA.","authors":"F. Moravec, M. Bakenhaster, S. Seyoum, M. Tringali","doi":"10.14411/fp.2024.006","DOIUrl":"https://doi.org/10.14411/fp.2024.006","url":null,"abstract":"Morphological data are used to describe a new nematode species, Heterocheilus floridensis sp. n. (Heterocheilidae) from the digestive tract of the Florida manatee Trichechus manatus latirostris (Harlan) (Trichechidae, Sirenia) from Florida, USA. Examination by light and scanning electron microscopy revealed that the new species differs from the related Heterocheilus tunicatus Diesing, 1839 mainly by having dentigerous ridges on the inner surface of the lips, a median unpaired papilla located anterior to the cloaca, and a considerably larger body size. Sequence data for subunits I and II of mitochondrial cytochrome oxidase gene, 18S small subunit and 28S ribosomal RNA genes were provided for molecular characterisation of the new species. However, the current unavailability of homologous sequence data for congeneric specimens precluded a molecular assessment of the morphological species hypothesis, and ascaridoid phylogenetic hypotheses could not be advanced. Specimens of Heterocheilus sp. collected from the Antillean manatee Trichechus manatus manatus Linnaeus in Puerto Rico, on loan from the US National Museum of Natural History, were morphologically consistent with the new species, so apparently all congeneric nematodes reported from both subspecies of the West Indian manatee Trichechus manatus Linnaeus and previously identified as H. tunicatus belong rather to H. floridensis sp. n. Heterocheilus hagenbecki (Khalil et Vogelsang, 1932) Sprent 1980 is here considered to be a species inquirenda. A key to valid species of Heterocheilus Diesing, 1839 is provided.","PeriodicalId":505605,"journal":{"name":"Folia Parasitologica","volume":" 880","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140383074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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