Journal of Helminthology最新文献

Population dynamics of a South African isolate of Steinernema yirgalemense in vitro liquid culture, using egg yolk as protein source. 以蛋黄为蛋白质来源的南非分离株 Steinernema yirgalemense 体外液体培养的种群动态。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-11-06 DOI: 10.1017/S0022149X24000452

M D Dunn, A P Malan

{"title":"Population dynamics of a South African isolate of Steinernema yirgalemense in vitro liquid culture, using egg yolk as protein source.","authors":"M D Dunn, A P Malan","doi":"10.1017/S0022149X24000452","DOIUrl":"https://doi.org/10.1017/S0022149X24000452","url":null,"abstract":"The entomopathogenic nematode (EPN), Steinernema yirgalemense, is an effective biological control agent against a variety of important insect pests in South Africa. To develop a South African EPN product feasibly in South Africa, EPNs need to be mass-produced. This study aimed to record the population dynamics of S. yirgalemense with in vitro liquid production in shake flasks, with a protein source of powdered egg yolk. The Erlenmeyer flask results indicated variation between flasks, albeit still achieving high yields. The reasons for attaining such variability in the recovery, yield, and growth stages are unclear, hence requiring further studies seeking to increase consistency. The results obtained indicate that, when IJ recovery is low, yields are also low due to relatively few reproductive adults being present in solution, which, in turn, produces more offspring, which later converts to the desired infective juvenile used for product formulation development. For commercial viability, a consistent production system is required that produces predictable yields. This study showed comparable high yields achieved with the flasks and in an early-stage bioreactor setup, being a positive development for S. yirgalemense mass production. Prior to the bioreactor scale-up process, protocol of mass production, the population and growth dynamics of the nematodes in the flask environment requires understanding. This is a positive step, leading to the future commercialisation of a local EPN product.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142583398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the diversity of freshwater fish trematodes from Laguna Escondida, Los Tuxtlas tropical rainforest, Mexico, using morphology and 28S rDNA sequences as barcodes. 利用形态学和 28S rDNA 序列作为条形码，评估墨西哥 Los Tuxtlas 热带雨林 Laguna Escondida 淡水鱼吸虫的多样性。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-11-05 DOI: 10.1017/S0022149X2400049X

Y Velázquez-Urrieta, M García-Varela, G Pérez-Ponce de León

{"title":"Assessing the diversity of freshwater fish trematodes from Laguna Escondida, Los Tuxtlas tropical rainforest, Mexico, using morphology and 28S rDNA sequences as barcodes.","authors":"Y Velázquez-Urrieta, M García-Varela, G Pérez-Ponce de León","doi":"10.1017/S0022149X2400049X","DOIUrl":"https://doi.org/10.1017/S0022149X2400049X","url":null,"abstract":"Despite a great effort made for almost 90 years, the diversity of freshwater fish trematodes in Mexico is still far from being fully known. The addition of molecular data to the description of trematode diversity in the last two decades added the potential to establish more robust species limits and a more accurate biodiversity estimation, but also led in some instances to the recognition of cryptic species complexes. Here, we used sequences of the large subunit of the nuclear ribosomal gene (28S rRNA) as barcodes, and morphological data, to assess the diversity of freshwater fish trematodes from a lake within a tropical rainforest. Eighty freshwater fish specimens of eight species were studied, and 120 trematode specimens were collected. Morphologically, specimens were allocated into nine genera; molecular phylogenetic analyses along with sequence divergence data provided evidence for recognising 11 trematode taxa, six adults and five metacercariae; six of them were identified to species level. Geographical distribution and host association patterns are briefly discussed for each trematode taxa.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142576387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Narrowing gender gap in the research on echinococcosis and editorial contribution of women in parasitology journals. 缩小棘球蚴病研究中的性别差距以及妇女在寄生虫学期刊编辑工作中的贡献。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-11-05 DOI: 10.1017/S0022149X24000579

R Kaveh, N Ashrafhesari, S M Mousavi, M Fasihi Harandi

{"title":"Narrowing gender gap in the research on echinococcosis and editorial contribution of women in parasitology journals.","authors":"R Kaveh, N Ashrafhesari, S M Mousavi, M Fasihi Harandi","doi":"10.1017/S0022149X24000579","DOIUrl":"https://doi.org/10.1017/S0022149X24000579","url":null,"abstract":"Gender equity and authorship diversity are believed to be the essential parts of building a dynamic scientific atmosphere. The purpose of the present study was to determine the status of gender equity in research on echinococcosis and the editorial diversity in major parasitology journals over the past four decades. All articles were retrieved from major databases from the years 1980, 2000, 2010, 2015, and 2020. Journals belonging to the four quartiles of parasitology journals listed in the Journal Citation Report were selected, and the gender and region of each editorial member were identified. Among the 3583 first authors of the articles published in all selected years, 2236 (62.4%) were men, whereas 1040 (29%) were women. There was a significant increase in women's contributions as the first author, from 6.8% in 1980 to 35.8% in 2020 (P < .001). A greater gender gap was found for the senior authors, showing 2391 (66.7%) men and 837 (23.4%) women. The gender gap has been narrowed in most of the six regions of the world, particularly for the Western Pacific region, where the gender inequity had almost diminished in 2020; i.e. the man-woman ratios of the first and last authors from this region were 2.25 and 1.75 in 1980, reaching 1.04 and 0.97, in 2020, respectively. Our findings also indicated that articles authored by men received 2.5 to 3.1 times more citations than women authors. Gender distribution of the editors-in-chief, associate editors, and editorial board members across all quartiles showed that 78.7%, 69.5%, and 72.7% were men, respectively, and mostly affiliated with the European and American regions. Findings of the present study showed that gender inequity is still present and women researchers continue to be the minority in the field of parasitology, particularly in the research on echinococcosis.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142576291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New record and phylogenetic assessment of Apopharynx bolodes (Braun, 1902) (Digenea: Psilostomidae), a parasite of Eurasian Coot Fulica atra Linnaeus, 1758 (Aves: Rallidae). Apopharynx bolodes (Braun, 1902) (Digenea: Psilostomidae)的新记录和系统发育评估，它是欧亚鸥Fulica atra Linnaeus, 1758 (Aves: Rallidae)的寄生虫。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-11-05 DOI: 10.1017/S0022149X24000543

S A Vlasenkov, L N Akimova, S G Sokolov

引用次数: 0

A new genus and species of Microphalloidea (Digenea), parasite of Peropteryx spp. (Chiroptera: Emballonuridae) from the Neotropical region of Mexico revealed by morphological and phylogenetic analyses. 通过形态学和系统发育分析发现墨西哥新热带地区寄生于Peropteryx spp.（Chiroptera: Emballonuridae）的Microphalloidea（Digenea）新属和新种。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-11-04 DOI: 10.1017/S0022149X24000531

N G Ruiz-Torres, D I Hernandez-Mena, L García-Prieto, L I Falcón, J A Panti-May, O Rico-Chávez

{"title":"A new genus and species of Microphalloidea (Digenea), parasite of Peropteryx spp. (Chiroptera: Emballonuridae) from the Neotropical region of Mexico revealed by morphological and phylogenetic analyses.","authors":"N G Ruiz-Torres, D I Hernandez-Mena, L García-Prieto, L I Falcón, J A Panti-May, O Rico-Chávez","doi":"10.1017/S0022149X24000531","DOIUrl":"10.1017/S0022149X24000531","url":null,"abstract":"The present study aims to describe a new genus and species of microphalloid digenean parasite of two species of bats of the genus Peropteryx from the Mexican Neotropics (in the states of Chiapas and Yucatán). Morphological and molecular data (28s rDNA ribosomal gene sequences) were used to study Digeneans. Sagittatrema zutzi gen. nov. sp., nov., is diagnosed morphologically by having a sagittiform body, a genital pore in the midline of the body, posterior to the ventral sucker, and a cirrus sac running through much of the diameter of the ventral sucker. The nine sequences generated from the 28S rDNA gene were used to examine the phylogenetic affinities of this new taxon within the superfamily Microphalloidea Ward, 1901, using Maximum Likelihood and Bayesian Inference analyses. Both analyses resulted in trees with similar topologies and formed a well-supported clade (Bt = 100; pp = 1) with the Sagittatrema sequences. Because of the new genus's phylogenetic position and that some sister families to the proposed taxa, like Pleurogenidae and Prosthogonimidae, are polyphyletic, we prefer to consider Sagittatrema as a genus incertae sedis within Microphalloidea. A full systematic review of microphalloids is needed to confirm their phylogenetic position.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142568959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First genetic characterisation and phylogenetic position of Aplectana hylambatis (Nematoda: Cosmocercidae), infecting Pithecopus azureus (Anura: Hylidae) in the Brazilian Pantanal. 巴西潘塔纳尔地区感染 Pithecopus azureus（Anura: Hylidae）的 Aplectana hylambatis（线虫纲：Cosmocercidae）的首次遗传特征和系统发育位置。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-10-31 DOI: 10.1017/S0022149X24000609

P S Dos Santos, I C O Silva, V L Ferreira, L E R Tavares, F Paiva, F B Pereira

{"title":"First genetic characterisation and phylogenetic position of Aplectana hylambatis (Nematoda: Cosmocercidae), infecting Pithecopus azureus (Anura: Hylidae) in the Brazilian Pantanal.","authors":"P S Dos Santos, I C O Silva, V L Ferreira, L E R Tavares, F Paiva, F B Pereira","doi":"10.1017/S0022149X24000609","DOIUrl":"10.1017/S0022149X24000609","url":null,"abstract":"Aplectana hylambatis (Baylis, 1927) is a widespread nematode in South America that infects different species of anurans from different families. Although the morphology of this species shows intraspecific variations and is well studied, A. hylambatis does not have genetic characterisation. Therefore, the present study aimed to provide the first genetic characterisation of this parasite, based on 18S and 28S rDNA sequences, as well as to evaluate its phylogenetic position in the family Cosmocercidae. The present specimens showed no major morphological variations and were assigned to A. hylambatis mainly based on the shape of spicules and the presence of mamelon-like structures slightly anterior to the vulva. The genetic characterisation confirmed the close relationship between A. hylambatis and other cosmocercids, and the 28S sequences were more informative for phylogenetic reconstruction, especially for those relationships at higher and intermediate levels. Aplectana hylmabatis was in a basal position within a clade formed by other congeners and species of Cosmocerca. The geographic origin may have influence in the divergence process of Aplectana spp. and genus was non-monophyletic and closely related to Cosmocerca, similar to previous findings. The present results will be useful for future studies on the phylogeny of Cosmocercidae, since several genera and species in this family still lack genetic characterisation. Furthermore, the 28S sequences can be useful in genetic studies of A. hylambatis populations, since this species appears to have phenotypic variations.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142545777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Is Schistosoma mansoni playing a part in liver carcinogenesis? 曼氏血吸虫是否参与了肝癌的发生？

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-10-29 DOI: 10.1017/S0022149X24000506

S Jain

{"title":"Is Schistosoma mansoni playing a part in liver carcinogenesis?","authors":"S Jain","doi":"10.1017/S0022149X24000506","DOIUrl":"https://doi.org/10.1017/S0022149X24000506","url":null,"abstract":"The relationship between Schistosoma mansoni (Sm) and hepatocellular carcinoma (HCC) has been evaluated by many studies that point towards a co-relation between schistosomal infection and HCC. While many such studies demonstrated that Sm infection in the presence of another carcinogenic factors leads to HCC, none of these studies could conclusively prove the cancer-inducing ability of Sm in humans, independent of other carcinogenic factors. The aim of this work is to present the current understanding on the association of Sm with HCC. Many epidemiological, pathological, and clinical studies have shown the role of multiple events like chronic inflammation and fibrosis as well as hepato-toxic agents like soluble egg antigens (SEAs), which help in creating a micro-environment which is suitable for HCC development. The role of Sm infection and deposited eggs in causing persistent inflammation, advanced fibrosis, and the role of SEAs, especially IPSE/alpha-1, is emphasised. This work concludes that Sm infection has the potential to induce cancer independently but the same has not been reported in humans to date. Extensive research is required to establish a causal relationship between Sm infection and HCC induction, or a complete lack thereof. However, Sm infection definitely acts along with other carcinogenic factors to induce HCC at a much faster pace and also leads to an aggressive form of liver cancer, which the other carcinogenic factor could not have achieved alone.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142522060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Never ending diversity: two new species of the genus Allocreadium (Digenea: Allocreadiidae) including new keys to the genus. 永无止境的多样性：Allocreadium 属的两个新种（Digenea: Allocreadiidae），包括该属的新钥匙。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-10-28 DOI: 10.1017/S0022149X24000440

K S Vainutis

{"title":"Never ending diversity: two new species of the genus Allocreadium (Digenea: Allocreadiidae) including new keys to the genus.","authors":"K S Vainutis","doi":"10.1017/S0022149X24000440","DOIUrl":"https://doi.org/10.1017/S0022149X24000440","url":null,"abstract":"Two new species of the genus Allocreadium were isolated from the intestines of the Lake minnow Rhynchocypris percnura caught in the backwater of the Komissarovka River in the South of the Russian Far East. The morphology of A. anastasii n. sp. corresponds to that of Allocreadium sp. from Lake Khar (Mongolia) and Allocreadium sp. Belous, 1952 from the Primorsky region of Russia except for the preacetabular anterior border of the vitelline follicles in A. anastasii n. sp. from the Komissarovka River vs. at anterior half of ventral sucker in Allocreadium sp. Genetic analysis revealed the identity of A. anastasii n. sp. to Allocreadium sp. 1 from the Nezhinka River and Lake Khar. Allocreadium macrolecithum n. sp. was differentiated from Palaearctic Allocreadium spp. by having the following features: respectively large vitelline follicles extending from posterior extremity to anterior margin of the ventral sucker; relatively short caeca reaching the border of middle and posterior thirds of hindbody; and small testes in the middle of hindbody. Interspecific genetic p-distances between Allocreadium spp. were 0.16-7.23% in 28S gene and 18.62-31.54% in Cox1 mtDNA gene. In the phylogenetic tree reconstructed with Maximum parsimony and Bayesian Inference methods, A. anastasii n. sp. and A. macrolecithum n. sp. were nested into different species groups of the genus Allocreadium - sister to A. khankaiense and A. bursense, respectively. Modified dichotomous keys were prepared for 31 Palaearctic species of Allocreadium including A. crassum, A. dogieli, A. papilligerum, A. bursense, A. anastasii n. sp., and A. macrolecithum n. sp.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrative taxonomy reveals two new species of Maritrema Nicoll, 1907 (Digenea: Microphallidae Ward, 1901), parasitizing birds in the Gulf of Mexico. 综合分类法揭示了寄生于墨西哥湾鸟类的 Maritrema Nicoll, 1907（Digenea: Microphallidae Ward, 1901）的两个新物种。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-10-28 DOI: 10.1017/S0022149X24000403

Y Aldama-Prieto, M T González-García, B Mendoza-Garfías, G Pérez-Ponce de León, M García-Varela

{"title":"Integrative taxonomy reveals two new species of Maritrema Nicoll, 1907 (Digenea: Microphallidae Ward, 1901), parasitizing birds in the Gulf of Mexico.","authors":"Y Aldama-Prieto, M T González-García, B Mendoza-Garfías, G Pérez-Ponce de León, M García-Varela","doi":"10.1017/S0022149X24000403","DOIUrl":"https://doi.org/10.1017/S0022149X24000403","url":null,"abstract":"Members of the genus Maritrema Nicoll, 1907 include endoparasites of aquatic birds and mammals, distributed worldwide. Adult specimens were collected from the intestines of three bird species (the great black hawks, Buteogallus urubitinga Gmelin; laughing gull, Leucophaeus atricilla Linnaeus; and the willet, Tringa semipalmata Gmelin) in three localities along the Gulf of Mexico. Photogenophores were sequenced for the large subunit (LSU) from nuclear rDNA, and the new sequences were aligned with other microphalloid sequences available in GenBank. The maximum likelihood and Bayesian inference analyses revealed three independent lineages, one corresponding to a previously described species, Maritrema corai Hernández-Orts, Pinacho-Pinacho, García-Varela & Kostadinova, 2016, and two representing two undescribed species. These two new species are described in the current study. Maritrema itzamnai n. sp. can be morphologically differentiated from its four congeneric species occurring in coastal areas of Mexico by having smaller oral (20-29 × 20-38 μm) and ventral (20-39 × 19-33 μm) suckers. In addition, Maritrema itzamnai n. sp. possess annular vitellarium instead of a horseshoe-shaped vitellarium. Maritrema kukulkanni n. sp. can be distinguished from its congeneric species reported from Mexico by possessing a larger oesophagus (44-117μm) and by having a vitellarium distributed in both the hindbody and forebody. Maritrema corai is the third species recorded in this study parasitizing the great black hawk (Buteogallus urubitinga); this represents a new host and locality record, expanding its distribution range from the Mexican Pacific Ocean to the Gulf of Mexico.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphological and molecular characterisation of two new species of Rhipidocotyle (Digenea: Bucephalidae Poche, 1907) from Sphyraena putnamae Jordan & Seale in Mozambique. 来自莫桑比克 Sphyraena putnamae Jordan & Seale 的两个 Rhipidocotyle （Digenea: Bucephalidae Poche, 1907）新种的形态学和分子特征。

IF 1.3 3区生物学

Journal of Helminthology Pub Date : 2024-10-28 DOI: 10.1017/S0022149X24000476

J C Dumbo, Q M Dos Santos, A Avenant-Oldewage

{"title":"Morphological and molecular characterisation of two new species of Rhipidocotyle (Digenea: Bucephalidae Poche, 1907) from Sphyraena putnamae Jordan & Seale in Mozambique.","authors":"J C Dumbo, Q M Dos Santos, A Avenant-Oldewage","doi":"10.1017/S0022149X24000476","DOIUrl":"https://doi.org/10.1017/S0022149X24000476","url":null,"abstract":"Species-level delineation of digenetic trematodes is complex and can be best achieved by integrative taxonomy using both genetic characterisation and morphological analysis. Two new Bucephalidae species of the genus Rhipidocotyle Diesing, 1858 are described here based on specimens collected from the intestine of Sphyraena putnamae Jordan & Seale following this approach. Adults of R. siphonyaka n. sp. and R. nolwe n. sp. possess tentacles and a tegument with scales. They are distinguished from their congeners by the arrangement of the digestive structures, the extent of the uterus relative to vitelline fields, and the arrangement of the reproductive structures. Rhipidocotyle siphonyaka n. sp. differs from R. nolwe n. sp. in having the pharynx and mouth positioned in the pre-uterine field, tandem testes, longer body length, and shorter pre-vitelline and post-testicular distance. Rhipidocotyle siphonyaka n. sp. differs from its congeners in having a tube-like intestinal caecum, pharynx and mouth opening positioned in the pre-vitelline field. Rhipidocotyle nolwe n. sp. appears to be similar, morphologically and morphometrically, to Rhipidocotyle khalili (Nagaty, 1937). Despite their similarities, R. nolwe n. sp. has a shorter body length and egg size. Moreover, the molecular analysis of 28S and ITS rDNA fragments indicate that R. siphonyaka n. sp. and R. nolwe n. sp. are closely related phylogenetically but distinct from one another and other Bucephalidae for which molecular data are available.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0