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The evolution of tadpole shape: first insights into larval diversity of the Physalaemus deimaticus group with the description of two new forms (Anura, Leptodactylidae, Leiuperinae) 蝌蚪形态的进化：从两种新形态（无尾目、细足目、细足目）的描述，首次了解小绒猴类群的幼虫多样性

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-30 DOI: 10.1016/j.jcz.2025.08.011

Raíla Brena Araújo , Iasodhara Rodrigues Freire , Filipe Augusto Cavalcanti do Nascimento , Tiago Leite Pezzuti

{"title":"The evolution of tadpole shape: first insights into larval diversity of the Physalaemus deimaticus group with the description of two new forms (Anura, Leptodactylidae, Leiuperinae)","authors":"Raíla Brena Araújo , Iasodhara Rodrigues Freire , Filipe Augusto Cavalcanti do Nascimento , Tiago Leite Pezzuti","doi":"10.1016/j.jcz.2025.08.011","DOIUrl":"10.1016/j.jcz.2025.08.011","url":null,"abstract":"<div><div>The Physalaemus deimaticus species group comprises four species distributed in high-altitude areas in southeastern Brazil. In this study we describe the tadpoles of two of these species, Physalaemus claptoni and P. deimaticus, and explore the body shape evolution in the group. Both species share external features with the other species of the group, but P. claptoni presents a larger and globular body, while P. deimaticus is quite similar to Physalaemus erythros, its sister species, sharing a P3 tooth row of the same length than P2, and submarginal papillae distributed in rows. The phylomorphospace analysis based on geometric morphometrics demonstrated that species of the P. deimaticus group exhibit a wide range of shapes, encompassing a great part of the variation found in the Physalaemus signifer clade. Thus, although ecomorphological correlations between shape and habitat type (i.e., lentic/lotic gradient) are evident at a narrower phylogenetic scale (i.e., within the P. deimaticus group), they become ambiguous when examined at a broader phylogenetic context (i.e., P. signifer group). Despite the general homoplasy scenario and the absence of important transformations in the evolution of body shape of the P. signifer group, the optimizations retrieved shape changes for the common ancestor of P. deimaticus and P. erythros, supporting their close relationship. Our results show that phylogenetic morphometric methods are effective for describing the evolution of tadpole shape, a set of traits not easily captured by discrete characters or linear measurements. Furthermore, the description of two tadpoles of Physalaemus increases knowledge of the larval diversity of the genus.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"319 ","pages":"Pages 78-89"},"PeriodicalIF":1.5,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997394","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

Unravelling morphological disparity and faunal change across the J/K transition using geometric morphometrics: A case study of ammonites from central Chile 利用几何形态计量学揭示J/K过渡时期的形态差异和区系变化：以智利中部菊石为例

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-29 DOI: 10.1016/j.jcz.2025.08.013

Miguel A. Bustos , Christian A. Salazar , Claudio F. Cornejo , Hugo A. Benítez , Christian M. Ibáñez

{"title":"Unravelling morphological disparity and faunal change across the J/K transition using geometric morphometrics: A case study of ammonites from central Chile","authors":"Miguel A. Bustos , Christian A. Salazar , Claudio F. Cornejo , Hugo A. Benítez , Christian M. Ibáñez","doi":"10.1016/j.jcz.2025.08.013","DOIUrl":"10.1016/j.jcz.2025.08.013","url":null,"abstract":"<div><div>Changes in species diversity may be accompanied by morphospace variation at different spatial and temporal scales. Evidence indicates that shifts in species diversity and morphological disparity (morphodisparity) are prevalent among marine invertebrates across the geological scale. This study estimates the diversity and morphodisparity of ammonites across the Jurassic–Cretaceous (J/K) transition—from the Tithonian to the Valanginian stages—by examining 158 specimens representing 33 species and 21 genera from four localities in central Chile. Ammonites were photographed in lateral and frontal views to perform geometric morphometrics analyses based on landmarks and semilandmarks. The resulting shapes were evaluated using multivariate statistical approaches across geological stages. Results suggest that faunal changes in diversity during the J/K transition are associated with significant variations in ammonite morphospace. Notably, significant changes in morphodisparity were observed between the late Tithonian and early Berriasian, and again between the early and late Berriasian. This study not only documents faunal turnover in central Chile but also contributes to our understanding of how extinction pulses can drive morphological innovation or constraint during key evolutionary transitions.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"319 ","pages":"Pages 1-11"},"PeriodicalIF":1.5,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920329","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 descriptions of two new Thoracostomopsidae species (Nematoda, Enoplida) with the brief discussion on nematode spicules origin 两种胸孔虫科新种（线虫、线虫）的综合描述及对线虫针状体起源的简要讨论

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-29 DOI: 10.1016/j.jcz.2025.08.012

Julia K. Zograf, Kseniya V. Efimova, Vladimir V. Mordukhovich

{"title":"Integrative descriptions of two new Thoracostomopsidae species (Nematoda, Enoplida) with the brief discussion on nematode spicules origin","authors":"Julia K. Zograf, Kseniya V. Efimova, Vladimir V. Mordukhovich","doi":"10.1016/j.jcz.2025.08.012","DOIUrl":"10.1016/j.jcz.2025.08.012","url":null,"abstract":"<div><div>Summary - Nematodes from the family Thoracostomopsidae are ubiquitous in the World Ocean. Two species were found in subtidal bottom sedments off the eastern coast of the Kamchatka Peninsula. A taxonomic revision of the genus Trileptium has been provided. The new genus Neotrileptium gen. nov. was established and two new species Neotrileptium gracilis gen. et sp. nov. and Neotrileptium unicum gen. et sp. nov. are described. Neotrileptium gen.nov. shows all the main characters of Thoracostomopsidae, but differs from all known thoracostomopsids in the shape and position of the mandibular complexes (situated well forward in a spacious buccal cavity). The new species differ from others in this genus by a very large body size (more than 20,000 μm for N. unicum gen. et sp. nov. and more than 9000 μm for N. gracilis gen. et sp. nov.) and the presence of a pronounced circle of short cervical setae. Data on the nearly full length of the 18S rDNA, D1-D3 and D8-D10 domains of the 28S rDNA and ITS/5.8S and cox1 mtDNA nucleotide sequences were obtained. A phylogenetic analysis of the family Thoracostomopsidae was carried out using data on the nucleotide sequences of nuclear DNA of representatives of all three subfamilies (Thoracostominae, Enoplolaiminae, and Trileptiinae). The results of phylogenetic analysis did not confirm the monophyly of the last two subfamilies and many genera.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"319 ","pages":"Pages 50-69"},"PeriodicalIF":1.5,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144933605","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

Molecular taxonomy of bumblebee gobies (Oxudercidae: Gobionellinae: Brachygobius) in Peninsular Malaysia 马来西亚半岛大黄蜂虾虎鱼的分子分类（虾虎鱼科：虾虎鱼科：虾虎鱼科）

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-26 DOI: 10.1016/j.jcz.2025.08.010

Nur Liyana Binti Khairul Yusri , Jamsari Amirul Firdaus Jamaluddin , Abdullah Halim Muhammad-Rasul , Mohd Lokman Ilham-Norhakim , Sahat Ratmuangkhwang , Sébastien Lavoué

{"title":"Molecular taxonomy of bumblebee gobies (Oxudercidae: Gobionellinae: Brachygobius) in Peninsular Malaysia","authors":"Nur Liyana Binti Khairul Yusri , Jamsari Amirul Firdaus Jamaluddin , Abdullah Halim Muhammad-Rasul , Mohd Lokman Ilham-Norhakim , Sahat Ratmuangkhwang , Sébastien Lavoué","doi":"10.1016/j.jcz.2025.08.010","DOIUrl":"10.1016/j.jcz.2025.08.010","url":null,"abstract":"<div><div>Tropical Asia is home to the brackish/freshwater fish genus Brachygobius (Teleostei: Oxudercidae: Gobionellinae), commonly known as bumblebee gobies due to the alternating black and yellow/whitish bands on their bodies. The taxonomy of these miniature fishes is insufficiently studied, making their identification difficult. Here, we examined the species diversity of bumblebee gobies in Peninsular Malaysia by applying two molecular markers: the “barcode” fragment of the cytochrome c oxidase subunit I (COI) gene and a fragment of the nuclear rhodopsin (rho) gene. Twenty-four COI sequences and 20 rho sequences of Brachygobius were newly determined, combined and analysed with available data from both within and outside Peninsular Malaysia. A species delimitation approach conservatively revealed nine species of Brachygobius in our dataset. Conflicts with the current morphology-based classification were identified. Brachygobius sabanus and Brachygobius doriae are not reciprocally monophyletic, while Brachygobius nunus and Brachygobius kabiliensis each represent a species complex. Four species occur in Peninsular Malaysia, which we identified as Brachygobius xanthomelas, Brachygobius sabanus, Brachygobius nunus, and Brachygobius cf. aggregatus. A photograph of a specimen from each species in Peninsular Malaysia, along with habitat and distribution information, is provided.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"319 ","pages":"Pages 20-30"},"PeriodicalIF":1.5,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922574","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

Contarinia maculipennis, a worldwide invasive flower and vegetable pest possessing the particularities of rearrangement and tRNA secondary structures of mitogenome: A potential key to revealing its extensive host radiation maculpennis，一种具有有丝分裂基因组重排和tRNA二级结构特征的世界性入侵花卉和蔬菜害虫：揭示其广泛宿主辐射的潜在关键

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-25 DOI: 10.1016/j.jcz.2025.08.009

Ning-Bo Ma , Xiu-Fang Dong , Yu Ji , Xin Jin , De-Wei Wei , Yan-Fei Li , Zheng-Hao Yue , Wen-Jun Bu , Ke-Long Jiao

{"title":"Contarinia maculipennis, a worldwide invasive flower and vegetable pest possessing the particularities of rearrangement and tRNA secondary structures of mitogenome: A potential key to revealing its extensive host radiation","authors":"Ning-Bo Ma , Xiu-Fang Dong , Yu Ji , Xin Jin , De-Wei Wei , Yan-Fei Li , Zheng-Hao Yue , Wen-Jun Bu , Ke-Long Jiao","doi":"10.1016/j.jcz.2025.08.009","DOIUrl":"10.1016/j.jcz.2025.08.009","url":null,"abstract":"<div><div>In this study, we first obtained the complete mitochondrial genome of Contarinia maculipennis, an important worldwide invasive flower and vegetable pest, from Hengzhou, Nanning, Guangxi, China, then annotated its mitogenome, and analyzed its tRNA secondary structures, which is the first report of comprehensive set of the tRNA secondary structures provided in Family Cecidomyiidae. And we also annotated Dasineura ulmaria's mitogenome sequence from NCBI too. By comparing the rearrangement features of the mitogenome of C. maculipennis with all the other identified and sequenced gall midge species as well as the outgroups, we identified the particularities of rearrangement features and tRNA-Val secondary structure of C. maculipennis. By further sorting out and analyzing the tRNA-Val secondary structures of all the identified gall midge species as well as the outgroups, combined with the classification, phylogenetic analysis and rearrangement characteristics, we found some patterns in Cecidomyiidi as well as Cecidomyiinae, and especially the related powerfully verified particularities of C. maculipennis, which may be a potential key to reveal its extensive host radiation.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"319 ","pages":"Pages 12-19"},"PeriodicalIF":1.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922575","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

Descriptions of two new species of Platypygus Loew (Diptera: Bombyliidae: Mythicomyiinae) from China 文章题目中国低鸭嘴兽二新种记述（双翅目：绵蝇科：绵蝇科）

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-25 DOI: 10.1016/j.jcz.2025.08.008

Haotian Lei , Xuankun Li

引用次数: 0

High diversity and population structure in a widespread tarantula Sickius longibulbi (Mygalomorphae: Theraphosidae) 一种广布狼蛛的种群结构及其多样性（mygalomorae: Theraphosidae）

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-23 DOI: 10.1016/j.jcz.2025.08.007

Beatriz B. Groppo, Millke Jasmine A. Morales, Tiago Belintani, José Paulo L. Guadanucci

{"title":"High diversity and population structure in a widespread tarantula Sickius longibulbi (Mygalomorphae: Theraphosidae)","authors":"Beatriz B. Groppo, Millke Jasmine A. Morales, Tiago Belintani, José Paulo L. Guadanucci","doi":"10.1016/j.jcz.2025.08.007","DOIUrl":"10.1016/j.jcz.2025.08.007","url":null,"abstract":"<div><div>Sickius Soares & Camargo, 1948 is a monotypic genus (Sickius longibulbi) characterized by a broad geographic distribution across Brazil and conservative morphology. Notably, females lack spermathecae, and males possess palpal bulb with a long embolus, both traits with taxonomic importance. The genus belongs to the infraorder Mygalomorphae, a group with intricate taxonomic challenges due to uniform morphology, complicating species delimitation. In the present study, we employed an integrative taxonomic approach, combining mitochondrial DNA sequences of the Cytochrome Oxidase I (COI) gene with Fourier Elliptical Analysis of the male palpal bulb shape to investigate lineage differentiation and evolutionary patterns within the genus Sickius. We observed genetic structured populations along with morphometric variation and geographic distribution, except for the two lineages localized in northeast Cerrado. We retain S. longibulbi as a single species with great diversity and possibly undergoing a process of divergence. Future studies with larger sample sizes are encouraged to confirm these findings and further investigate the evolutionary history of the genus.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"319 ","pages":"Pages 31-40"},"PeriodicalIF":1.5,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144926128","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

Revisiting the genus Priocnemella (Hymenoptera: Pompilidae): a long-overdue taxonomic update 重新审视茧蜂属（膜翅目：茧蜂科）：一个迟来的分类更新

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-22 DOI: 10.1016/j.jcz.2025.08.004

André Vital Ferreira , James P. Pitts , Cecilia Waichert

{"title":"Revisiting the genus Priocnemella (Hymenoptera: Pompilidae): a long-overdue taxonomic update","authors":"André Vital Ferreira , James P. Pitts , Cecilia Waichert","doi":"10.1016/j.jcz.2025.08.004","DOIUrl":"10.1016/j.jcz.2025.08.004","url":null,"abstract":"<div><div>Pompilidae are a group of wasps popularly known as spider hunters due to their behavior of capturing spiders for the development of their larvae. Many of the Neotropical genera lack extensive studies and taxonomic keys, for instance Priocnemella Banks. This genus has recently undergone changes in taxonomic composition following a revision of Eragenia Banks, a morphologically and phylogenetically related genus. Eragenia has received some species transferred from Priocnemella, while Phanochilus Banks was synonymized with Priocnemella. Despite the proposed changes, the group has never been revised taxonomically. Species identification is hampered by the lack of updated keys and illustrations. This study aims to review the genus Priocnemella, examining external morphology of both sexes and male genitalia morphology. Priocnemella aurata (Fox, 1897) has its status revalidated; Priocnemella hexagona omissa Banks, 1946 and Priocnemella eurytheme (Banks, 1944) are synonymized with P. hexagona (Fox, 1897) new syn.; and Priocnemella dimidiaticornis (Spinola, 1851) is discussed, with its male described and illustrated for the first time. Ten species of Priocnemella are recognized: Priocnemis fairchildi (Banks, 1925), Priocnemella fuscomarginata (Fox, 1897), Priocnemella hexagona (Banks, 1925), Priocnemella gloriosa (Smith, 1873), Priocnemella aurata (Fox, 1897) status rev., Priocnemella aurodecorata (Cameron, 1912), Priocnemella nobilitata (Smith, 1866), Priocnemella ornata (Banks, 1946); Priocnemella insignis (Banks, 1946), and Priocnemella dimidiaticornis (Spinola, 1851). Our results underscore the critical need for further taxonomic studies to enhance our understanding of biodiversity.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"319 ","pages":"Pages 90-102"},"PeriodicalIF":1.5,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049752","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

Description of the first continental European species of the huntsman spider Cebrennus (Araneae, Sparassidae), confirming the presence of the genus in the region 描述了欧洲大陆第一个猎人蛛（蜘蛛目，蛛蛛科）种，证实了该属在该地区的存在

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-21 DOI: 10.1016/j.jcz.2025.08.005

Marc Domènech , Arnau Calatayud-Mascarell , Álvaro Pérez-Gómez , Mattia Giacomelli , Arturo Iglesias Baquero , Maite Mojica , Juan José Guerrero , Miquel A. Arnedo , Jesus Lozano-Fernandez

{"title":"Description of the first continental European species of the huntsman spider Cebrennus (Araneae, Sparassidae), confirming the presence of the genus in the region","authors":"Marc Domènech , Arnau Calatayud-Mascarell , Álvaro Pérez-Gómez , Mattia Giacomelli , Arturo Iglesias Baquero , Maite Mojica , Juan José Guerrero , Miquel A. Arnedo , Jesus Lozano-Fernandez","doi":"10.1016/j.jcz.2025.08.005","DOIUrl":"10.1016/j.jcz.2025.08.005","url":null,"abstract":"<div><div>Because of its wide variety of climates and habitats, the Iberian Peninsula harbors a rich and diverse arachnological fauna, including numerous endemisms. This is especially true for habitats like arid and semiarid areas. Many of them are threatened despite containing interesting –and sometimes uncharacterised– fauna, such as the huntsman spiders in the genus Cebrennus.</div><div>Previously known to occur from North Africa to the Middle East, new sightings of these spiders in Europe have drawn attention. Here, we use morphological and molecular data to describe a new species of Cebrennus from specimens collected in eastern Spain. Additionally, we use genetic data to place the new species, Cebrennus herculis sp. n., in a phylogenetic context and speculate on the biogeographic processes that lead to its presence in Europe.</div><div>Genetic distances among individuals of C. herculis sp. n. were low for the three molecular markers analysed (COI, 18S and 28S). Our phylogenetic tree recovered the monophyly of the Iberian Cebrennus, and placed them as sister to the only African representative with genetic data available, Cebrennus rungsi. Furthermore, divergence time analysis revealed a Palaeogene-Neogene split between the Iberian lineage and C. rungsi, compatible with an allopatric speciation following one of the ancient connections between Europe and Africa landmasses.</div><div>These findings show that habitats such as arid and semiarid areas still hide new and interesting diversity, underscoring the importance of preserving them.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 178-186"},"PeriodicalIF":1.5,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913660","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 description and morphometry of the nymphal instars of five species of Rhodnius Stål, 1859 (Hemiptera: Reduviidae: Triatominae) 1859年5种红蝇稚虫的形态描述与形态测定（半翅目：红蝇科：红蝇科）

IF 1.5 3区生物学

Zoologischer Anzeiger Pub Date : 2025-08-21 DOI: 10.1016/j.jcz.2025.08.006

Jociel Klleyton Santos Santana , Jader de Oliveira , João Aristeu da Rosa

{"title":"Morphological description and morphometry of the nymphal instars of five species of Rhodnius Stål, 1859 (Hemiptera: Reduviidae: Triatominae)","authors":"Jociel Klleyton Santos Santana , Jader de Oliveira , João Aristeu da Rosa","doi":"10.1016/j.jcz.2025.08.006","DOIUrl":"10.1016/j.jcz.2025.08.006","url":null,"abstract":"<div><div>Rhodnius is a genus with unresolved taxonomic questions. These insects are potential vectors of Trypanosoma spp., including the etiological agent of Chagas disease. Their presence in urban areas has become increasingly frequent, and in some cases, immature specimens are observed in the absence of adults, making identification on the species level difficult. Given their vector capacity and the scarcity of taxonomic studies on immatures, this study aims to describe morphologically, as well as through linear and geometric morphometry, the five nymphal instars of R. montenegrensis, R. nasutus, R. neglectus, R. neivai, and R. stali. The morphological description of the immature instars allows for differentiation among the studied species. In linear morphometry, at least one trait in all instars showed a statistically significant difference between groups (p < 0.05). Geometric morphometry of the head highlighted differences that segregated the species; however, the pronotum was not an informative structure. The techniques used in this study enabled the specific identification of the analyzed species. As with Rhodnius adults, the head is highly informative for nymphs and should continue to be explored in taxonomic studies.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 165-177"},"PeriodicalIF":1.5,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144904249","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