PeerJ最新文献

{"title":"A comparative evaluation of haematological and biochemical parameters of <i>Nemipterus randalli</i> and <i>Pagellus erythrinus</i> species living in Gökova Bay, Türkiye.","authors":"Rifat Tezel, Ümit Acar, Sercan Yapıcı","doi":"10.7717/peerj.18784","DOIUrl":"10.7717/peerj.18784","url":null,"abstract":"<p><p>This study aims to determine and compare the reference values of the haematological and biochemical blood parameters of two fish species collected from the Gökova Bay (Muğla, South-Western of Türkiye): the non-native and invasive Randall's threadfin bream, <i>Nemipterus randalli</i> and the native Common pandora, <i>Pagellus erythrinus</i>. Both species inhabit the same environment and compete for resources. Blood samples were collected from a total of 100 fish samples (50 <i>N. randalli</i> and 50 <i>P. erythrinus</i>) which were caught from a depth of 30 to 60 meters between February 2023 and July 2024. Therefore, sampling could be carried out in summer and winter seasons when the water temperature varies significantly. The results indicate that red blood cell (RBC), haemoglobin (Hb) and haematocrit (Hct) levels significantly increases in summer (<i>p</i> < 0.05). Statistical analyses revealed that all of the haematological parameters of <i>N. randalli</i> are higher than the <i>P. erythrinus</i> (<i>p</i> < 0.05). In terms of serum biochemical parameters, glucose (GLU), triglyceride (TRIG), cholesterol (CHOL), total protein (TP), aspartate aminotransferase (AST) and alkaline phosphatase (ALP) levels of two species had showed no significant difference in both summer and winter samples (<i>p</i> > 0.05). However, serum alanine aminotransferase (ALT) levels of <i>N. randalli</i> were statistically significant different compared to <i>P. erythrinus</i> in summer and winter samples (<i>p</i> < 0.05). Additionally, the highest lactate dehydrogenase (LDH) value was measured from <i>N. randalli</i> in summer sampling and this was found to be significantly different from other groups (<i>p</i> < 0.05). Multidimensional scaling (MDS) analysis revealed differences between the blood parameter results of <i>N. randalli</i> and <i>P. erythrinus</i> individuals. This study provides important data about the physiological adaptations of haematological and biochemical blood parameters of the two species to environmental factors. The similarity in haematological and biochemical parameters revealed the possibility that <i>N. randalli</i> could distribute to new habitats where <i>P. erythrinus</i> is distributed. This suggests a further potential distribution of the invasive <i>N. randalli</i> and the need for a careful monitoring.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18784"},"PeriodicalIF":2.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11756358/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143029197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The relationship between steroid treatment and mortality in patients with COVID-19 followed up in an intensive care unit.","authors":"Huseyin Ali Ozturk, Fatih Necip Arici","doi":"10.7717/peerj.18606","DOIUrl":"https://doi.org/10.7717/peerj.18606","url":null,"abstract":"<p><strong>Aim: </strong>Optimal treatment of the coronavirus disease (COVID-19) is still unclear. It has been reported that the use of different doses of corticosteroid treatments may reduce mortality. In our study, we aimed to find the effect of corticosteroid treatment dose on mortality of patients followed up in intensive care due to COVID-19.</p><p><strong>Methods: </strong>Our retrospective, descriptive and single-centre study included 102 patients diagnosed with COVID-19 who were followed up in intensive care unit, 28 of whom received pulse steroids and 74 of whom received high dose steroids. Laboratory values, duration of intensive care unit and mortality rates of the patients were evaluated.</p><p><strong>Results: </strong>Mortality was found to be statistically significantly lower in the group receiving pulse steroid compared to the group receiving high dose steroid. In multivariate logistic regression analysis, age and pulse steroid were found to be independent predictors of mortality. According to this analysis, each 10-year increase in age increased mortality by 4.8%, whereas pulse steroid decreased mortality by 79.4%.</p><p><strong>Conclusion: </strong>In our study, we found that mortality was statistically significantly lower in the group of patients receiving pulse steroids than in the group receiving high dose steroids. We found that the number of patients using pulse steroids was statistically significantly lower in the group with mortality. We found that age and pulse steroid independently determined the patients with mortality.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18606"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745129/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of fMRI in the mind decoding process in adults: a systematic review.","authors":"Sahal Alotaibi, Maher Mohammed Alotaibi, Faisal Saleh Alghamdi, Mishaal Abdullah Alshehri, Khaled Majed Bamusa, Ziyad Faiz Almalki, Sultan Alamri, Ahmad Joman Alghamdi, Mohammed Alhazmi, Hamid Osman, Mayeen U Khandaker","doi":"10.7717/peerj.18795","DOIUrl":"https://doi.org/10.7717/peerj.18795","url":null,"abstract":"<p><strong>Background: </strong>Functional magnetic resonance imaging (fMRI) has revolutionized our understanding of brain activity by non-invasively detecting changes in blood oxygen levels. This review explores how fMRI is used to study mind-reading processes in adults.</p><p><strong>Methodology: </strong>A systematic search was conducted across Web of Science, PubMed, and Google Scholar. Studies were selected based on strict inclusion and exclusion criteria: peer-reviewed; published between 2000 and 2024 (in English); focused on adults; investigated mind-reading (mental state decoding, brain-computer interfaces) or related processes; and employed various mind-reading techniques (pattern classification, multivariate analysis, decoding algorithms).</p><p><strong>Results: </strong>This review highlights the critical role of fMRI in uncovering the neural mechanisms of mind-reading. Key brain regions involved include the superior temporal sulcus (STS), medial prefrontal cortex (mPFC), and temporoparietal junction (TPJ), all crucial for mentalizing (understanding others' mental states).</p><p><strong>Conclusions: </strong>This review emphasizes the importance of fMRI in advancing our knowledge of how the brain interprets and processes mental states. It offers valuable insights into the current state of mind-reading research in adults and paves the way for future exploration in this field.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18795"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745131/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The pattern and burden of non-communicable diseases in armed conflict-exposed populations in Northeastern Nigeria.","authors":"Roland I Stephen, Jennifer A Tyndall, Jamiu S Olumoh, Malachy I Okeke, Jacob A Dunga, Tonde G Elijah, Dillys M Bello, Oyelola A Adegboye, Jimmy A Reyes","doi":"10.7717/peerj.18520","DOIUrl":"https://doi.org/10.7717/peerj.18520","url":null,"abstract":"<p><strong>Background: </strong>The risk of non-communicable diseases (NCDs) in conflict and post-conflict settings in Northeastern Nigeria has not been evaluated to date. As this region undergoes recovery, understanding the prevalence of NCDs, such as hypertension, diabetes, depression, and obesity, and the associated behavioral coping mechanisms, is crucial for developing tailored healthcare solutions. Therefore, this study aimed to assess the impact of conflict on the prevalence of NCDs in conflict-exposed areas in Northeastern Nigeria compared with non-conflict regions.</p><p><strong>Methods: </strong>This study was an unmatched cross-sectional study. The participants were selected from inpatients and outpatients at general hospitals in Mubi (conflict-exposed) and Jada (non-conflict), which are local government areas in Adamawa, a state in Northeastern Nigeria. The study was conducted over four months, and data on various health indicators were collected. Multivariable binary logistic regression and complementary log regression were performed to investigate the effects of individual risk factors and regional settings on the prevalence of NCDs.</p><p><strong>Findings: </strong>A sample of 463 individuals from both locations was analyzed. The prevalence of hypertension, diabetes, abdominal obesity, and depression in the entire cohort was 22.92%, 5.04%, 44.19%, and 17.94%, respectively. The rates of hypertension and abdominal obesity in the conflict-exposed Mubi were lower, and the rate of depression was higher than those recorded in Jada. Females showed higher rates of hypertension, obesity, and depression than males. The residents of Mubi had lower odds of having abdominal obesity (adjusted odds ratio (aOR) = 0.18; 95% confidence interval (CI) [0.11-0.28]) but a higher risk of depression (incidence risk ratio (IRR) = 4.78; 95% CI [2.51-9.22]) than those in Jada. However, the participants affected by insurgency showed higher odds of having both abdominal obesity (aOR = 1.95; 95% CI [1.23-3.08]) and depression (IRR = 1.76; 95% CI [1.08-2.88]) than those who were not affected by the conflict.</p><p><strong>Conclusions: </strong>The findings of this study underscore the urgent need for mental health support in conflict-affected regions and comprehensive healthcare strategies for the aging population. As adjustment of lifestyle factors is crucial for addressing NCDs, effective case management and food security are essential for reducing the risk of NCDs in conflict-exposed populations.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18520"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745130/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"What 'unexplored' means: mapping regions with digitized natural history records to look for 'biodiversity blindspots'.","authors":"Laymon Ball, Sheila Rodríguez-Machado, Diego Paredes-Burneo, Samantha Rutledge, David A Boyd, David Vander Pluym, Spenser Babb-Biernacki, Austin S Chipps, Rafet Ç Öztürk, Yahya Terzi, Prosanta Chakrabarty","doi":"10.7717/peerj.18511","DOIUrl":"https://doi.org/10.7717/peerj.18511","url":null,"abstract":"<p><p>We examined global records of accessible natural history voucher collections (with publicly available data and reliable locality data) for terrestrial and freshwater vascular plants, fungi, freshwater fishes, birds, mammals, and herpetofauna (amphibians and reptiles) and highlight areas of the world that would be considered undersampled and sometimes called 'unexplored' (<i>i.e</i>., have relatively low, or no evidence of, past sampling efforts) under typical Western-scientific descriptions. We also question what 'unexplored' may mean in these contexts and explain how replacing the term in favor of more nuanced phrasing (<i>e.g</i>., 'biodiversity blindspots,' which emphasizes the lack of publicly available data about specimens) can mitigate future misunderstandings of natural history science. We also highlight geographic regions where there are relatively few or no publicly available natural history records to raise awareness about habitats that might be worthy of future natural history research and conservation. A major finding is that many of the areas that appear 'unexplored' may be in countries whose collections are not digitized (<i>i.e</i>., they don't have metadata such as GPS coordinates about their voucher specimens publicly available). We call for museums to prioritize digitizing those collections from these 'biodiversity blindspots' and for increased funding for museums to aid in these efforts. We also argue for increased scientific infrastructure so that more reference collections with vouchers can be kept in the countries of origin (particularly those countries lacking such infrastructure currently).</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18511"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745132/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143008049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing soil health through activated acacia biochar under varying irrigation regimes and cultivars for sustainable wheat cultivation.","authors":"Lubaba Komal, Summera Jahan, Atif Kamran, Abeer Hashem, Graciela Dolores Avila-Quezada, Elsayed Fathi Abd Allah","doi":"10.7717/peerj.18748","DOIUrl":"https://doi.org/10.7717/peerj.18748","url":null,"abstract":"<p><p>Wheat, a staple food crop globally, faces the challenges of limited water resources and sustainable soil management practices. The pivotal elements of the current study include the integration of activated acacia biochar (AAB) in wheat cultivation under varying irrigation regimes (IR). A field trial was conducted in the Botanical Garden, University of the Punjab, Lahore during 2023-2024, designed as a split-split-plot arrangement with RCBD comprising three AAB levels (0T, 5T, and 10T, T = tons per hectare) three wheat cultivars (Dilkash-2020, Akbar-2019, and FSD-08) receiving five IR levels (100%, 80%, 70%, 60%, and 50% field capacity). Biochar amended soil showed improved BET surface area, pore size, and volume. Carbon recovery (45%) and carbon sequestration capacity (49%) of 10T-AAB amended soil were better than non-amended soil (0.43% and 0.13%, respectively). The 10T-AAB amendment significantly improved the soil's microporosity and water retention capacity, increasing it by 1.1 and 2.2 times, respectively. Statistical analysis showed that a reduction in IR negatively affected plant growth and yield. The 10T-AAB levels significantly increased sugar contents (14%), relative water content (10-28%), membrane stability index (27-55%), and photosynthetic pigments (18-26%) of wheat leaves under deficit irrigation among all the cultivars. Maximum stress markers (catalase, proline, peroxidase, and superoxide dismutase) were observed from Akbar under 50% irrigation with 0T-AAB, and the least were observed from 50% irrigated Dilkash-2020 with 10T-AAB amended soil. Among cultivars, Dilkash-2020 was observed to be the best for maximum yield, followed by FSD-08 and Akbar-2019, respectively. When compared to other IR levels, 10T-AAB amended soil had the highest yield enhancement (12, 11, and 9.2 times for Dilkash-2020, FSD-08, and Akbar-2019, respectively). Hence, AAB enhanced wheat production by improving soil properties, drought resilience, and yield attributes.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18748"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745133/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Body size prediction in scorpions: a phylogenetic comparative examination of linear measurements of individual body parts.","authors":"Stênio Í A Foerster","doi":"10.7717/peerj.18621","DOIUrl":"https://doi.org/10.7717/peerj.18621","url":null,"abstract":"<p><p>Body size has always been the focus of several ecological studies due to its undeniable influence on other life-history traits. The conventional representation of body size in arthropods typically relies on linear measures, such as total body length, or the length of specific body parts that can be used to represent body size. While these measures offer simplicity over more complicated alternatives (<i>e.g</i>., dry mass), technical problems persist for arthropods with complex body structures, as is the case for scorpions. In these animals, accurate measurements often require extensive handling, including the stretching of body parts. In light of the difficulties associated with directly measuring total length and carapace length in scorpions (two prevalent proxies for body size in the group), this study evaluates the ability of seven simple linear measurements in predicting length measures of boy size in scorpions under a phylogenetic framework. Predictive equations derived from phylogenetic mixed linear models fitted under Bayesian framework were implemented in custom R functions that can be applied for size prediction in a wide range of scorpions. Overall, accurate predictions of total length and carapace length could be achieved using any of the studied traits as single predictors. However, the most accurate predictions for total length were obtained using the length of metasomal segment V, while the best predictions for carapace length were achieved using telson length. The addition of a secondary predictor had low impact on the quality of the size predictions, indicating that increasing model complexity by incorporating additional predictors is not necessary to achieve accurate size estimates. Technical advantages and limitations associated with each linear measurement are discussed. In conclusion, this study broadens the repertoire of methods available for accurately estimating body size in scorpions, particularly in instances where body size information can only be obtained indirectly through allometric relationships.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18621"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745135/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep cryptic diversity in the <i>Craugastor podiciferus</i> Species Group (Anura: Craugastoridae) of Isthmian Central America revealed by mitochondrial and nuclear data.","authors":"Erick Arias, Andrew J Crawford, Andreas Hertz, Gabriela Parra Olea","doi":"10.7717/peerj.18212","DOIUrl":"https://doi.org/10.7717/peerj.18212","url":null,"abstract":"<p><p>The <i>Craugastor podiciferus</i> Species Group contains eleven species of terraranan frogs distributed from eastern Honduras to eastern Panama. All species have remarkable color pattern polymorphisms, which may contribute to potential taxonomic problems. We performed exhaustive sampling throughout the geographic distribution of the group to evaluate the phylogenetic relationships and biogeographic history of all named species based on two mitochondrial markers and nuclear ddRAD loci. We also implemented various species delimitation methods to test for the presence of unconfirmed candidate species within the group. Molecular phylogenetic analyses showed that the group contains four major clades. All currently named species are supported by molecular data, yet species richness within the group is clearly underestimated. Species delimitation was discordant between the mitochondrial and nuclear datasets and among analytical methods. Adopting a conservative approach, we propose that the <i>C. podiciferus</i> species group contains at least 12 unconfirmed candidate species. Ancestral area reconstruction showed that the group originated and diversified in the highlands of the Talamancan montane forest ecoregion of Costa Rica and western Panama.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18212"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11745134/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143008008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between phase angle, body mass index and insulin resistance in patients with type 2 diabetes mellitus: a cross-sectional study.","authors":"Yezi Hu, Hui Jin","doi":"10.7717/peerj.18815","DOIUrl":"https://doi.org/10.7717/peerj.18815","url":null,"abstract":"<p><p><b>Background:</b> The purpose of this analysis was to investigate the associations between phase angle (PhA), body mass index (BMI) and insulin resistance (IR) in patients with type 2 diabetes mellitus (T2DM). <b>Methods:</b> The retrospective cross-sectional study included 200 T2DM patients treated during 2018 to 2019 in Zhongda Hospital Southeast University. PhA and other body composition indicators were measured by bioelectrical impedance analysis (BIA). Subjects were classified into four groups based on body composition: low phase angle and low body mass index (LPLB), low phase angle and high body mass index (LPHB), high phase angle and low body mass index (HPLB) and high phase angle and high body mass index (HPHB). <b>Results:</b> Overall, in the unadjusted model and minor, all adjusted models (unadjusted model, models 1-4), homeostasis model assessment of insulin resistance (HOMA-IR) was higher in the LPHB group than in the LPLB group (<i>P</i> = 0.034). In the unadjusted model, Model 1 (adjustment for age), Model 2 (adjust for age+duration), Model 3 (adjust for age+duration+sex+UA+TG+TC) and Model 4 (adjust for age+duration+sex+UA+TG+TC+HDL+HbA1c), the adjusted ORs for participants were 4.4 (95% CI [1.72-11.24]), 4.41 (95% CI [1.73-11.27]), 4.75 (95% CI [1.83-12.32]), 2.93 (95% CI [1.04-8.23]) and 3.1 (95% CI [1.09-8.86]) respectively, compared to LPHB group. <b>Conclusions:</b> T2DM patients with the body composition of low phase angle and high body mass index exhibited the most severe degree and the highest risk of insulin resistance.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18815"},"PeriodicalIF":2.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11742247/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three new species of the family Idyanthidae (Copepoda, Harpacticoida) from sublittoral zones around the Korean Peninsula.","authors":"Jong Guk Kim, Kyuhee Cho, Jimin Lee","doi":"10.7717/peerj.18767","DOIUrl":"https://doi.org/10.7717/peerj.18767","url":null,"abstract":"<p><p>There are few taxonomic studies of the harpacticoid family Idyanthidae Lang, 1944 in the Pacific Ocean. As a first report of the family in this region, one species of the monotypic genus <i>Idyellopsis</i> Lang, 1948 and two species of the genus <i>Idyella</i> Sars, 1905 are described from sublittoral habitats around the Korean Peninsula. <i>Idyellopsis orientalis</i> sp. nov. is distinguished from the type and only species of the genus, <i>Idyellopsis typica</i> Lang, 1948, in the length:width ratio of the body and genital double-somite, length of caudal seta I, and structure of the female P5 baseoendopod. <i>Idyella dolichi</i> sp. nov. and <i>Idyella exochos</i> sp. nov. share the armature of the female P5 exopod with four setae with <i>Idyella exigua</i> Sars, 1905, <i>Idyella major</i> Sars, 1920, and <i>Idyella pallidula</i> Sars, 1905. However, the two new species differ from the three European species in the armature of the terminal segment of the P1 endopod and female P5 baseoendopod, and in the shape of the genital double-somite. The male of <i>Idyella dolichi</i> sp. nov. also has two distinct features: the distal two segments of the P2 endopod are completely fused, and the third segment of the antennule has a prominent outer projection. The geographical distribution of <i>Idyellopsis</i> and <i>Idyella</i> is extended by the discovery of three new species in Korean waters. We also discuss a possible phylogenetic relationship among members of family Idyanthidae at genus level.</p>","PeriodicalId":19799,"journal":{"name":"PeerJ","volume":"13 ","pages":"e18767"},"PeriodicalIF":2.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11742251/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}