Pub Date : 2024-07-17DOI: 10.48156/1388.2024.1917283
José Miguel Avendaño-Marín, Alejandro Hoyos Blanco, Camilo Flórez-V, Fernando J. Muñoz-Quesada, C. Bota-Sierra
The páramos are high mountain ecosystems in the tropical regions of the New World, and they are particularly threatened by climate change. The Belmira páramo complex in Colombia is home to Mesamphiagrion gaudiimontanum, an endemic and endangered damselfly species. This study presents the first demographic assessment of M. gaudiimontanum using the capture-recapture method to estimate population size, survival, and detection probabilities, focusing on differences in age, sex, female color morphs, and parasite infestation. The population size was estimated to be 730 ± 186.59 individuals, with an average survival probability of 0.89 ± 0.04 and a life expectancy of 8.34 days, these data are like the reported for other populations in the same genus in harsh environmental conditions. Ectoparasitic mites were more common on juveniles than adults. After several hours of observing the species few copula events have been recorded, all of them involving juvenile adult females, which points to a monandrous reproduction syndrome for the species. Another phenomenon observed in the species was a change in coloration due to body temperature in individuals, in which bright coloration becomes grayish in cold weather. This study provides fundamental data for future monitoring and conservation efforts, highlighting the species’ vulnerability to environmental changes and the need for specific conservation strategies.
{"title":"Demography and natural history of the damselfly Mesamphiagrion gaudiimontanum (Coenagrionidae), a Páramo endemic species in the Colombian Andes","authors":"José Miguel Avendaño-Marín, Alejandro Hoyos Blanco, Camilo Flórez-V, Fernando J. Muñoz-Quesada, C. Bota-Sierra","doi":"10.48156/1388.2024.1917283","DOIUrl":"https://doi.org/10.48156/1388.2024.1917283","url":null,"abstract":"The páramos are high mountain ecosystems in the tropical regions of the New World, and they are particularly threatened by climate change. The Belmira páramo complex in Colombia is home to Mesamphiagrion gaudiimontanum, an endemic and endangered damselfly species. This study presents the first demographic assessment of M. gaudiimontanum using the capture-recapture method to estimate population size, survival, and detection probabilities, focusing on differences in age, sex, female color morphs, and parasite infestation. The population size was estimated to be 730 ± 186.59 individuals, with an average survival probability of 0.89 ± 0.04 and a life expectancy of 8.34 days, these data are like the reported for other populations in the same genus in harsh environmental conditions. Ectoparasitic mites were more common on juveniles than adults. After several hours of observing the species few copula events have been recorded, all of them involving juvenile adult females, which points to a monandrous reproduction syndrome for the species. Another phenomenon observed in the species was a change in coloration due to body temperature in individuals, in which bright coloration becomes grayish in cold weather. This study provides fundamental data for future monitoring and conservation efforts, highlighting the species’ vulnerability to environmental changes and the need for specific conservation strategies.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141829687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-06DOI: 10.48156/1388.2024.1917277
Fredy Palacino-Rodríguez
Research about the behavior of Neotropical species is crucial to understand how the rapid environmental changes in the Neotropics affect the reproduction of various organisms. The reproductive behavior of insects in tropical ecosystems, such as those belonging to the order Odonata, is as yet scarcely known. In this article, the reproductive behavior of Erythrodiplax abjecta is described from several localities in the Colombian Andean Mountains. Playing out between 10:00 and 14:30 h, male individuals of this species may exhibit either territorial or satellite behavior. Sexually mature males and females engage in tandem and copulation behaviors, which are brief and may occur either perched or in flight. Females of E. abjecta oviposit directly in the water at various times, alternating with periods of rest. During oviposition, males stand guard over females, perched or hovering, in a quest to protect them against other males. Conspecific males have been observed to engage in sieges of perching or ovipositing females, as well as mating pairs. Following a siege, either the female or the original pair flees, or the besieging male will succeed in outcompeting the original male, take the female in tandem, copulate with her, and then guard her while she oviposits. If the female flees, she may perch elsewhere, continue ovipositing, or may be taken by another male. The intense male guarding behavior during oviposition could represent an adaptation to temporarily high male densities at oviposition sites and a high level of competition during the short period in which active copulation takes place.
{"title":"Reproductive behavior of Erythrodiplax abjecta (Rambur, 1842) from Andean Mountains","authors":"Fredy Palacino-Rodríguez","doi":"10.48156/1388.2024.1917277","DOIUrl":"https://doi.org/10.48156/1388.2024.1917277","url":null,"abstract":"Research about the behavior of Neotropical species is crucial to understand how the rapid environmental changes in the Neotropics affect the reproduction of various organisms. The reproductive behavior of insects in tropical ecosystems, such as those belonging to the order Odonata, is as yet scarcely known. In this article, the reproductive behavior of Erythrodiplax abjecta is described from several localities in the Colombian Andean Mountains. Playing out between 10:00 and 14:30 h, male individuals of this species may exhibit either territorial or satellite behavior. Sexually mature males and females engage in tandem and copulation behaviors, which are brief and may occur either perched or in flight. Females of E. abjecta oviposit directly in the water at various times, alternating with periods of rest. During oviposition, males stand guard over females, perched or hovering, in a quest to protect them against other males. Conspecific males have been observed to engage in sieges of perching or ovipositing females, as well as mating pairs. Following a siege, either the female or the original pair flees, or the besieging male will succeed in outcompeting the original male, take the female in tandem, copulate with her, and then guard her while she oviposits. If the female flees, she may perch elsewhere, continue ovipositing, or may be taken by another male. The intense male guarding behavior during oviposition could represent an adaptation to temporarily high male densities at oviposition sites and a high level of competition during the short period in which active copulation takes place.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141010358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-28DOI: 10.48156/1388.2024.1917274
Hannah E. Girgente, Nancy E. McIntyre
Globally, freshwater ecosystems and the organisms that depend on them are at risk. Dragonflies and damselflies (collectively, “odonates”) have a history of being used as bioindicators of freshwater habitat quality due to their wide range in environmental sensitivities across species and because they are relatively accessible. However, the nymphal stage is severely understudied compared to the adult stage, which inhibits conservation efforts. Somatochlora calverti is a rare species of dragonfly in the family Corduliidae; members of the genus Somatochlora are notoriously difficult to find and collect in the field as nymphs and adults. Somatochlora calverti is known primarily from the Florida panhandle but has been documented in Alabama, Georgia, and South Carolina. The nymph of this species is speculated to use seepage streams analogous to sympatric congeners; however, the nymph has never been collected in the field and, therefore, its specific microhabitat is unknown. We conducted a review from a suite of informational sources to generate a holistic consensus on what is defined to be suitable reproductive habitat for S. calverti. Sources identified eight major environmental characteristics that are likely to harbor S. calverti: shallow seepage streams, including steephead ravines, with undercut banks and mats of Sphagnum moss adjacent to intact sandhill forest. These ecosystems are being lost and degraded by anthropogenic activity, which has considerable impacts on the persistence of habitat specialists, including S. calverti, and managers’ ability to conserve them.
{"title":"Evaluation of speculated reproductive habitat for Somatochlora calverti (Corduliidae), a rare and range-restricted dragonfly","authors":"Hannah E. Girgente, Nancy E. McIntyre","doi":"10.48156/1388.2024.1917274","DOIUrl":"https://doi.org/10.48156/1388.2024.1917274","url":null,"abstract":"Globally, freshwater ecosystems and the organisms that depend on them are at risk. Dragonflies and damselflies (collectively, “odonates”) have a history of being used as bioindicators of freshwater habitat quality due to their wide range in environmental sensitivities across species and because they are relatively accessible. However, the nymphal stage is severely understudied compared to the adult stage, which inhibits conservation efforts. Somatochlora calverti is a rare species of dragonfly in the family Corduliidae; members of the genus Somatochlora are notoriously difficult to find and collect in the field as nymphs and adults. Somatochlora calverti is known primarily from the Florida panhandle but has been documented in Alabama, Georgia, and South Carolina. The nymph of this species is speculated to use seepage streams analogous to sympatric congeners; however, the nymph has never been collected in the field and, therefore, its specific microhabitat is unknown. We conducted a review from a suite of informational sources to generate a holistic consensus on what is defined to be suitable reproductive habitat for S. calverti. Sources identified eight major environmental characteristics that are likely to harbor S. calverti: shallow seepage streams, including steephead ravines, with undercut banks and mats of Sphagnum moss adjacent to intact sandhill forest. These ecosystems are being lost and degraded by anthropogenic activity, which has considerable impacts on the persistence of habitat specialists, including S. calverti, and managers’ ability to conserve them.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140371930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-13DOI: 10.48156/1388.2024.1917271
M. Hernández, P. Casanueva, Javier Oscoz, L. F. Sánchez-Sastre, M. Ferreras‐Romero, Francisco Campos
A two-variable analysis of male and female Cordulegaster boltonii larvae (head width and hindwing sheath length) in specimens from five Iberian populations was carried out with the objective of ascertaining whether these traits differ between populations. The results indicate that the southernmost population (Los Alcornocales, Andalusia) have larger sizes for both variables and a lower growth rate between the penultimate and final stadia. Winter water temperatures, which may cause a longer arrest of larval growth in northern populations, and possible differences in the number of larval stadia could be the origin of the size divergences.
研究人员对伊比利亚五个种群的 Cordulegaster boltonii 雌雄幼虫标本（头宽和后翅鞘长）进行了两变量分析，目的是确定不同种群之间这些特征是否存在差异。结果表明，最南端的种群（安达卢西亚的 Los Alcornocales）两个变量的尺寸都较大，倒数第二阶段和最后阶段之间的生长率较低。冬季水温可能导致北方种群的幼虫生长停滞时间更长，幼虫期数的差异也可能是造成体型差异的原因。
{"title":"Geographical variation in size of the three final stadia of Cordulegaster boltonii (Donovan, 1807) larvae in the Iberian Peninsula (Odonata: Cordulegastridae)","authors":"M. Hernández, P. Casanueva, Javier Oscoz, L. F. Sánchez-Sastre, M. Ferreras‐Romero, Francisco Campos","doi":"10.48156/1388.2024.1917271","DOIUrl":"https://doi.org/10.48156/1388.2024.1917271","url":null,"abstract":"A two-variable analysis of male and female Cordulegaster boltonii larvae (head width and hindwing sheath length) in specimens from five Iberian populations was carried out with the objective of ascertaining whether these traits differ between populations. The results indicate that the southernmost population (Los Alcornocales, Andalusia) have larger sizes for both variables and a lower growth rate between the penultimate and final stadia. Winter water temperatures, which may cause a longer arrest of larval growth in northern populations, and possible differences in the number of larval stadia could be the origin of the size divergences.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140247514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-05DOI: 10.48156/1388.2024.1917262
Aaron M. Goodman, Christopher D. Beatty, S. Büsse, H. Ubukata, Toshiyuki Miyazaki, Mary E. Blair, Jessica A. Ware
Disjunct biogeographic patterns of similar species remain enigmatic within evolutionary biology. Disparate distributions typically reflect species responses to major historical events including past climate change, tectonics, dispersal, and local extinction. Paleo-ecological niche modeling (PaleoENM) has proven useful in inferring the causes of disjunct distributions within charismatic and well-studied taxa including mammals, plants, and birds, but remains under-explored in insects. The relictual Asian dragonfly genus Epiophlebia (Suborder Epiophlebioptera: Epiophlebiidae) allows us a novel opportunity to explore PaleoENM in the context of disjunct distributions due to their endemism to the Japanese islands, Himalayas, China, and North Korea. The aim of this paper is to investigate the potential causes behind the modern distribution of Epiophlebia by inferring the historical range of these species within the Last Glacial Maximum (LGM), thereby highlighting the utility of PaleoENM in the context of odonate biogeography. Our results indicate possible past routes of gene flow of Epiophlebia during the LGM due to high habitat suitability of the genus stretching from the Himalayas to Japan. Furthermore, our results predict several unsampled areas which have the potential to harbor new populations of the genus.
{"title":"Paleoecological niche modeling of Epiophlebia (Epiophlebioptera: Epiophlebiidae) reveals continuous distribution during the Last Glacial Maximum","authors":"Aaron M. Goodman, Christopher D. Beatty, S. Büsse, H. Ubukata, Toshiyuki Miyazaki, Mary E. Blair, Jessica A. Ware","doi":"10.48156/1388.2024.1917262","DOIUrl":"https://doi.org/10.48156/1388.2024.1917262","url":null,"abstract":"Disjunct biogeographic patterns of similar species remain enigmatic within evolutionary biology. Disparate distributions typically reflect species responses to major historical events including past climate change, tectonics, dispersal, and local extinction. Paleo-ecological niche modeling (PaleoENM) has proven useful in inferring the causes of disjunct distributions within charismatic and well-studied taxa including mammals, plants, and birds, but remains under-explored in insects. The relictual Asian dragonfly genus Epiophlebia (Suborder Epiophlebioptera: Epiophlebiidae) allows us a novel opportunity to explore PaleoENM in the context of disjunct distributions due to their endemism to the Japanese islands, Himalayas, China, and North Korea. The aim of this paper is to investigate the potential causes behind the modern distribution of Epiophlebia by inferring the historical range of these species within the Last Glacial Maximum (LGM), thereby highlighting the utility of PaleoENM in the context of odonate biogeography. Our results indicate possible past routes of gene flow of Epiophlebia during the LGM due to high habitat suitability of the genus stretching from the Himalayas to Japan. Furthermore, our results predict several unsampled areas which have the potential to harbor new populations of the genus.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140263940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.48156/1388.2024.1917268
D. Ikemeyer, Thomas Schneider
The Levant is a hot spot of biodiversity, even for Odonata. Approximately 90 Odonata species were recorded for the Levant and 48 from Lebanon. Lebanon, as a central part of the Levant, was visited in 2022 and 2023 for searching dragonflies. Thirty four species including five of six Levant endemic Odonata: Calopteryx hyalina Martin, 1909, Calopteryx syriaca Rambur, 1842, Coenagrion syriacum (Morton, 1924), Pseudagrion syriacum Selys, 1887, Gomphus davidi Selys, 1887 as well as populations of the recently described Cordulegaster cilicia Schneider et al., 2021 were found. Ceriagrion georgifreyi Schmidt, 1953 was recognized as new for Lebanon and increases the number of Odonata to 49. The dramatic decline of the Levant endemic Odonata caused by habitat loss and destruction is discussed.
{"title":"Rare and endangered Odonata of Lebanon – an update with a discussion on the vanishing Levant endemic dragonfly fauna","authors":"D. Ikemeyer, Thomas Schneider","doi":"10.48156/1388.2024.1917268","DOIUrl":"https://doi.org/10.48156/1388.2024.1917268","url":null,"abstract":"The Levant is a hot spot of biodiversity, even for Odonata. Approximately 90 Odonata species were recorded for the Levant and 48 from Lebanon. Lebanon, as a central part of the Levant, was visited in 2022 and 2023 for searching dragonflies. Thirty four species including five of six Levant endemic Odonata: Calopteryx hyalina Martin, 1909, Calopteryx syriaca Rambur, 1842, Coenagrion syriacum (Morton, 1924), Pseudagrion syriacum Selys, 1887, Gomphus davidi Selys, 1887 as well as populations of the recently described Cordulegaster cilicia Schneider et al., 2021 were found. Ceriagrion georgifreyi Schmidt, 1953 was recognized as new for Lebanon and increases the number of Odonata to 49. The dramatic decline of the Levant endemic Odonata caused by habitat loss and destruction is discussed.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.48156/1388.2024.1917265
T. Simonsen, Marie Djernæs, O. F. Nielsen, Kent Olsen
We analysed COI and ITS sequences from a total of 69 European Pyrrhosoma nymphula (Sulzer, 1776) and three P. elisabethae Schmidt, 1948 to explore species boundaries and phylogeographic patterns in their Western Palearctic distributions. We found that phylogenetic and haplotype network analyses support previous results that the widespread P. nymphula and the endangered P. elisabethae are distinct species, and that P. nymphula in North Africa are distinct from P. nymphula in Europe. However, our results also suggest that neither diversification is complete as we found evidence for introgression of mitochondrial DNA between P. elisabethae and eastern Europe P. nymphula, as well as possible incomplete lineage sorting. Finally, our results indicate that while P. nymphula likely recolonized most of Europe from an Iberian Peninsula refugium following the Weichsel Glaciation, separate refugia possibly existed in North Africa, southern Italy, and for P. elisabethae in the southwestern Balkan.
我们分析了总共 69 个欧洲 Pyrrhosoma nymphula（Sulzer，1776 年）和 3 个 P. elisabethae Schmidt，1948 年的 COI 和 ITS 序列，以探索它们在古北西部分布的物种界限和系统地理学模式。我们发现，系统发育和单倍型网络分析支持之前的结果，即广布的P. nymphula和濒危的P. elisabethae是不同的物种，北非的P. nymphula与欧洲的P. nymphula是不同的。然而，我们的研究结果也表明，这两种蛱蝶的分化都不是完全的，因为我们发现了线粒体 DNA 在伊丽莎白蛱蝶和东欧蛱蝶之间的引入证据，以及可能存在的不完全的品系分类。最后，我们的研究结果表明，虽然P. nymphula很可能是在魏克塞尔冰川作用之后从伊比利亚半岛的避难所重新移居到欧洲大部分地区的，但在北非、意大利南部以及巴尔干半岛西南部可能存在单独的避难所。
{"title":"Increased geographic sampling suggests incomplete lineage sorting and recent introgression between Pyrrhosoma nymphula (Sulzer, 1776) and P. elisabethae Schmidt, 1948 in the Western Palearctic","authors":"T. Simonsen, Marie Djernæs, O. F. Nielsen, Kent Olsen","doi":"10.48156/1388.2024.1917265","DOIUrl":"https://doi.org/10.48156/1388.2024.1917265","url":null,"abstract":"We analysed COI and ITS sequences from a total of 69 European Pyrrhosoma nymphula (Sulzer, 1776) and three P. elisabethae Schmidt, 1948 to explore species boundaries and phylogeographic patterns in their Western Palearctic distributions. We found that phylogenetic and haplotype network analyses support previous results that the widespread P. nymphula and the endangered P. elisabethae are distinct species, and that P. nymphula in North Africa are distinct from P. nymphula in Europe. However, our results also suggest that neither diversification is complete as we found evidence for introgression of mitochondrial DNA between P. elisabethae and eastern Europe P. nymphula, as well as possible incomplete lineage sorting. Finally, our results indicate that while P. nymphula likely recolonized most of Europe from an Iberian Peninsula refugium following the Weichsel Glaciation, separate refugia possibly existed in North Africa, southern Italy, and for P. elisabethae in the southwestern Balkan.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140414600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-25DOI: 10.48156/1388.2024.1917256
K. Tennessen
Gomphomacromia signata sp. n. is described and illustrated based on a single male collected in Napo Province, Ecuador. The new species is distinct from its closest congener, G. fallax McLachlan, 1881, by having a pair of vivid yellow spots on the postfrons, a large isolated yellow spot on the anterolateral part of the mesepimeron, forked yellow stripes on the metepisternum and metepimeron, dark spots in the wing bases, epiproct as wide distally as basally, and minute details of the posterior hamules.
{"title":"Gomphomacromia signata sp. n. from the Andes Mountains in Ecuador (Odonata: Synthemistidae)","authors":"K. Tennessen","doi":"10.48156/1388.2024.1917256","DOIUrl":"https://doi.org/10.48156/1388.2024.1917256","url":null,"abstract":"Gomphomacromia signata sp. n. is described and illustrated based on a single male collected in Napo Province, Ecuador. The new species is distinct from its closest congener, G. fallax McLachlan, 1881, by having a pair of vivid yellow spots on the postfrons, a large isolated yellow spot on the anterolateral part of the mesepimeron, forked yellow stripes on the metepisternum and metepimeron, dark spots in the wing bases, epiproct as wide distally as basally, and minute details of the posterior hamules.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139596764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-23DOI: 10.48156/1388.2024.1917250
Guo-Hui Yang, Albert G. Orr
The final instar of Bayadera strigata Davies & Yang, 1996, from Yunnan Province, China, is described and illustrated for the first time. This study confirms several characters as being typical of, or unique to, the genus Bayadera and discusses them in comparison to other genera. The larva of B. strigata is distinguished from its congeners by the presence of numerous distinct short spines on the genae, but no long spines. The gonapophyses are unusually long in both sexes. Notes on this species’ habitat and behaviour are provided. The material examined will be stored at the Bioscience Museum of Dali University, Dali, Yunnan, China.
{"title":"The final-instar larva of Bayadera strigata Davies & Yang, 1996 from Yunnan, China (Odonata: Zygoptera: Euphaeidae)","authors":"Guo-Hui Yang, Albert G. Orr","doi":"10.48156/1388.2024.1917250","DOIUrl":"https://doi.org/10.48156/1388.2024.1917250","url":null,"abstract":"The final instar of Bayadera strigata Davies & Yang, 1996, from Yunnan Province, China, is described and illustrated for the first time. This study confirms several characters as being typical of, or unique to, the genus Bayadera and discusses them in comparison to other genera. The larva of B. strigata is distinguished from its congeners by the presence of numerous distinct short spines on the genae, but no long spines. The gonapophyses are unusually long in both sexes. Notes on this species’ habitat and behaviour are provided. The material examined will be stored at the Bioscience Museum of Dali University, Dali, Yunnan, China.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139604897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-12DOI: 10.48156/1388.2024.1917253
B. Samraoui, L. Touati, M. Ferreras‐Romero, Ahmed H. Alfarhan, Farrah Samraoui
Understanding the seasonal regulation and life cycle patterns of Odonata is critical to identifying the factors that influence their voltinism. While the life history and seasonal regulation of Odonata, particularly gomphids, has been studied extensively, few studies have focused on North African gomphids. This study aims to contribute to the understanding of the life cycle of Onychogomphus forcipatus unguiculatus (Vander Linden, 1823), a western Mediterranean gomphid, on the Seybouse River in northeastern Algeria and discuss its seasonal regulation. Our results imply that a generation of O. f. unguiculatus requires two years to develop. The appearance of small (F-6) larvae in early spring can be attributed to the hatching of eggs in the previous year, followed by their overwintering in interstitial habitats. This abrupt appearance of small larvae is the result of their unique life history strategy of developing and surviving in specialized habitats during winter, then continuously growing and developing. The senior cohort overlaps with its junior counterpart, overwintering primarily in instars F-1, F-2, and, to a lesser extent, F-3, before beginning to emerge in late spring and early summer. By examining the voltinism and life cycle patterns of O. f. unguiculatus, this study contributes to our understanding of the reproductive strategies and population dynamics of this western Mediterranean gomphid, as well as of factors affecting the phenology and ecology of Odonata, particularly in North Africa, and in this manner contributes to overall efforts to protect and manage freshwater ecosystems in this region.
了解蜻蜓的季节性调节和生命周期模式对于确定影响其伏季活动的因素至关重要。虽然人们已经对蜻蜓（尤其是蜚蠊）的生活史和季节调节进行了广泛研究，但很少有研究关注北非蜚蠊。本研究旨在帮助了解阿尔及利亚东北部 Seybouse 河上地中海西部鹅虻 Onychogomphus forcipatus unguiculatus（Vander Linden，1823 年）的生命周期，并讨论其季节性调节。我们的研究结果表明，O. f. unguiculatus 的一代发育需要两年时间。早春出现的小幼虫（F-6）可归因于前一年的卵孵化，然后在间隙栖息地越冬。小幼虫的突然出现是其独特生活史策略的结果，即冬季在专门的栖息地发育和生存，然后不断生长发育。高龄幼虫与低龄幼虫重叠，主要以 F-1、F-2 以及少量 F-3 阶段越冬，然后在春末夏初开始出土。通过研究 O. f. unguiculatus 的伏蛰和生命周期模式，本研究有助于我们了解这种地中海西部鹅蚜的繁殖策略和种群动态，以及影响鸟纲昆虫的物候学和生态学的因素，尤其是在北非，从而有助于保护和管理该地区淡水生态系统的整体工作。
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