Arthropod Structure & Development最新文献

Insights for the subtribal-level phylogenetic reconstructions in Paederinae (Coleoptera: Staphylinidae): a study on mesoventral plate with elements of comparative morphology 对拟蚊科（鞘翅目：拟蚊科）亚部落级系统发育重建的认识：中腹侧板的比较形态学研究

IF 1.3 3区农林科学

Arthropod Structure & Development Pub Date : 2025-08-02 DOI: 10.1016/j.asd.2025.101473

Alexandra Tokareva , Dagmara Żyła

{"title":"Insights for the subtribal-level phylogenetic reconstructions in Paederinae (Coleoptera: Staphylinidae): a study on mesoventral plate with elements of comparative morphology","authors":"Alexandra Tokareva , Dagmara Żyła","doi":"10.1016/j.asd.2025.101473","DOIUrl":"10.1016/j.asd.2025.101473","url":null,"abstract":"<div><div>Morphological characters are one of the bases for describing any organismal group and comparative morphology plays an important role in taxonomy, systematics, and evolutionary research. Yet, in many groups, especially highly diverse, the terminology and homology of morphological structures are poorly understood. One of such examples is the mega-diverse group of animals, rove beetles (Staphylinidae), where comparative studies are very rare, both across the subfamilies and within them. In this paper, we present our results of morphological examination of mesoventral sclerotisation across different subtribes and genera of Paederinae, which is one of the most diverse rove beetle subfamily. Additionally, we compare them with several representatives of Staphylininae and Xantholininae. We revise morphological terminology for the mesoventral area in Paederinae and propose a hypothesis for character homologisation within Paederinae and across the listed subfamilies. Our results are based on examination of representatives of 157 Paederinae genera and the major groups are illustrated by schematic drawings and SEM scans. Additionally, we introduce new characters with potential importance for subtribal level phylogenetic reconstruction of Paederinae relationships. This is the first comprehensive review of the mesoventral area for the subfamily.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"88 ","pages":"Article 101473"},"PeriodicalIF":1.3,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An evo-devo perspective on terrestrial isopod respiratory organs 陆生等足类动物呼吸器官的进化视角

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-07-24 DOI: 10.1016/j.asd.2025.101470

Kian Long Tan, Antónia Monteiro

引用次数: 0

Comparative analysis of light spectra emitted by two firefly species: Luciola italica and Luciola pedemontana 两种萤火虫的光谱比较分析：Luciola italica和Luciola pedemontana

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-07-21 DOI: 10.1016/j.asd.2025.101472

Tito Sacchi , Matteo Galli , Giuseppe Camerini

{"title":"Comparative analysis of light spectra emitted by two firefly species: Luciola italica and Luciola pedemontana","authors":"Tito Sacchi , Matteo Galli , Giuseppe Camerini","doi":"10.1016/j.asd.2025.101472","DOIUrl":"10.1016/j.asd.2025.101472","url":null,"abstract":"<div><div>Light plays an important role in fireflies (Coleptera, Lampyridae) and emission spectra and signalling patterns are usually species specific. In Italy there are two species of fireflies belonging to the genus <em>Luciola: Luciola italica</em> and <em>L. pedemontana</em>. No information was available on the light spectrum emitted by <em>L. italica</em> in vivo; moreover, the only data obtained on <em>L. pedemontana</em> dated back more than 50 years and were obtained using outdated measurement equipment. To fill this gap, we studied the spectra of adult males and females of both species. Samples were collected from the western central Po floodplain. Adults were sampled in the early part of the night when they were engaged in mating activity. The next day they were brought to the laboratory and their light emission was analysed using a spectrometer. The maximum emission wavelength (λ max) ranged from 571.8 nm to 584.8 nm. The values of λ max emitted by females of <em>L. italica</em> (581.5±2.4) and <em>L. pedemontana</em> (575.9±2.6) were significantly different. The plots obtained from the light emission measurements show a clear asymmetry, with a shorter tail on the left and a positive skew on the right. As light spectra depend on the structure of luciferases, such differences may indicate ongoing changes in the molecular composition of these enzymes resulting from the genomic divergence of the two species. The spectra of <em>L. italica</em> and <em>L. pedemontana</em> fall in the yellow region and are comparable to those of other <em>Luciola</em> species living in eastern Asia.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"88 ","pages":"Article 101472"},"PeriodicalIF":1.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The first complete larval development of the parasitic barnacle from the genus Briarosaccus 寄生藤壶属的第一个完整的幼虫发育

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-07-17 DOI: 10.1016/j.asd.2025.101469

Darya D. Golubinskaya, Olga M. Korn

{"title":"The first complete larval development of the parasitic barnacle from the genus Briarosaccus","authors":"Darya D. Golubinskaya, Olga M. Korn","doi":"10.1016/j.asd.2025.101469","DOIUrl":"10.1016/j.asd.2025.101469","url":null,"abstract":"<div><div>The complete larval development of <em>Briarosaccus hoegi</em> (Rhizocephala: Peltogastridae)<em>,</em> including five naupliar and one cypris stages, is described and illustrated using SEM. The present study confirms that all rhizocephalans have 5 naupliar stages during the larval development. The larvae of <em>B. hoegi</em> are almost twice as large as the larvae of other rhizocephalans. Male larvae are considerably larger than female ones, their sizes never overlap. Larvae of <em>B. hoegi</em> show the peltogastrid type of development. Late male nauplii have large frontal protrusions, absent in female larvae. The second antennular segment in male nauplii is definitely longer than that in female larvae. These two characters indicate a distinct sexual dimorphism between male and female nauplii of rhizocephalans. Nauplii and cyprid of <em>B. hoegi</em> have pigmented nauplius eyes and show positive phototaxis. There is no correlation between the presence of a flotation collar and a nauplius eye in rhizocephalan larvae. The attachment disc in the female cyprid has a flap-like extension at the posterior margin. The attachment disc in male and female cyprids possesses two sensory setae. The large aesthetasc in the male cyprid is unilobed. The subterminal aesthetasc in female cyprid terminates into a single long filamentous process. A short postaxial sensory seta on the second antennular segment is completely reduced in the male cyprid. The nauplii and cyprids of <em>B. hoegi</em> and <em>Briarosaccus tenellus</em> are very similar. Our study confirms that the genus <em>Briarosaccus</em> consists of two cryptic species.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"88 ","pages":"Article 101469"},"PeriodicalIF":1.7,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling the insect head: Segmentation and pancrustacean homologous 昆虫头的解剖：分节与盘壳类同源

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-05-31 DOI: 10.1016/j.asd.2025.101462

Patricia Nel , Michael S. Engel , Carmen Soriano , Sylvain Pont , Lauriane Jacquelin , Laurence Dollinger , Laure Desutter-Grandcolas , Tony Robillard , Romain Garrouste , Dany Azar , André Nel

{"title":"Unraveling the insect head: Segmentation and pancrustacean homologous","authors":"Patricia Nel , Michael S. Engel , Carmen Soriano , Sylvain Pont , Lauriane Jacquelin , Laurence Dollinger , Laure Desutter-Grandcolas , Tony Robillard , Romain Garrouste , Dany Azar , André Nel","doi":"10.1016/j.asd.2025.101462","DOIUrl":"10.1016/j.asd.2025.101462","url":null,"abstract":"<div><div>The segmental composition of the arthropodan head is a long-standing biological question. This is particularly controversial in insects where considerable fusion and modification obfuscate the postembryonic segmentation. Here we propose a reinterpretation of the insect head morphology and segmentation, which also accords with current genetic and embryological data. The new interpretation of a generalized insect head is based on the discovery of intercalary segment remnants (the intercalates), thanks to the use of 3D-reconstruction of a Cretaceous thripidan and to a reassessment of the ‘anterior tentorial arm’ as the anteriormost part of a lateral segmental suture from the contact of the head lobe and gnathal segments during development. We show that the two-jointed mandibular articulation is likely symplesiomorphic for Insecta, no longer supporting the clade ‘Dicondylia’, the most diverse lineage of all insects. We discuss new perspectives on the ‘labrum’ in Pancrustacea.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"87 ","pages":"Article 101462"},"PeriodicalIF":1.7,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A “bioluminescent” common cockchafer? 一种“生物发光”的普通鸡冠？

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-05-21 DOI: 10.1016/j.asd.2025.101451

Marcel Koken , Valérie Galin , Tim Koken , Harry Buckle , Fabien Verfaillie

引用次数: 0

3D is not just a tool - a study of the anal capsule in Craterostigmus tasmanianus Pocock (1902) (Chilopoda, Arthropoda) 三维技术不仅仅是一个工具——对1902年塔斯马那雄鼠肛门囊的研究（足足纲，节肢纲）

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-05-07 DOI: 10.1016/j.asd.2025.101450

Birk Rillich, Christian S. Wirkner

{"title":"3D is not just a tool - a study of the anal capsule in Craterostigmus tasmanianus Pocock (1902) (Chilopoda, Arthropoda)","authors":"Birk Rillich, Christian S. Wirkner","doi":"10.1016/j.asd.2025.101450","DOIUrl":"10.1016/j.asd.2025.101450","url":null,"abstract":"<div><div><em>Craterostigmus tasmanianus</em> Pocock, 1902, is a chilopod distinguished, among other features, by a unique structure known as the anal capsule. Morphological questions regarding the anal capsule pertain to the homology of its functional components when compared to other chilopods, as well as the morpho-functional mechanisms involved in its opening and closing. Additionally, there has been ongoing debate about the precise location of the anus on the anal capsule. Some studies have suggested that the anus is located at the posterior end of the capsule, while others have proposed a position in the middle of the ventral side of the capsule.</div><div>To address these questions, μCT and cLSM scans were conducted on the anal capsule of <em>C. tasmanianus</em> and the posterior segments of <em>Scutigera coleoptrata</em> (Linnaeus, 1758). The resulting data were processed using 3D visualization software. Different muscle groups were identified, and the cuticle was analyzed to determine the presence of resilin, a highly elastic component in arthropod cuticles.</div><div>Based on the findings, hypotheses were formulated regarding the morpho-functional mechanisms of movement and the homology of the anal capsule structures in <em>C. tasmanianus</em> and <em>S. coleoptrata</em>. The analysis also resolved the question of anus location, confirming that it is situated at the posterior end of the anal capsule.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"87 ","pages":"Article 101450"},"PeriodicalIF":1.7,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

That's how they roll: skeletal mechanics of enrolment and the importance of hydrostatic support in terrestrial isopods 这就是它们的滚动方式：骨骼力学的注册和陆地等足类动物的流体静力支撑的重要性

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-05-02 DOI: 10.1016/j.asd.2025.101452

Miloš Vittori

{"title":"That's how they roll: skeletal mechanics of enrolment and the importance of hydrostatic support in terrestrial isopods","authors":"Miloš Vittori","doi":"10.1016/j.asd.2025.101452","DOIUrl":"10.1016/j.asd.2025.101452","url":null,"abstract":"<div><div>Various arthropods can roll into a ball for protection. In terrestrial isopods (Oniscidea), this ability has likely evolved independently in different lineages. In this work, comparative imaging of extended and rolled isopods using micro-computed tomography of rapidly frozen individuals was coupled with live imaging. The results show that the points of rotation between consecutive body segments are positioned dorsolaterally and do not represent fixed joints, as previously assumed. Ridges at the anterior and posterior edges of consecutive dorsal plates (tergites) lean against each other at these points, allowing consecutive body segments to rotate relative to each other. Conglobating terrestrial isopods have shorter sternal plates than non-rollers. As a result, the sternal plates overlap only as an isopod rolls, forming furrows that accommodate the walking legs. The sternal plates are able to bend along a flexible suture at their midline, which is pulled inward during rolling. Both conglobating and non-conglobating terrestrial isopods are capable not only of ventral but also lateral flexion, which requires the separation of the surfaces that are in contact during rolling. The observed diversity of movements can be explained by the use of hydrostatic support provided by the hemocoel. The essential role of this hydrostatic support in the movement of isopods is demonstrated.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"87 ","pages":"Article 101452"},"PeriodicalIF":1.7,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel information on Caryosyntrips based on new appendages from China and the USA 基于中国和美国新附属物的核合体新资料

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-04-30 DOI: 10.1016/j.asd.2025.101448

Xianfeng Yang , Julien Kimmig , Stephen Pates , Paul G. Jamison , Shuhan Ma

{"title":"Novel information on Caryosyntrips based on new appendages from China and the USA","authors":"Xianfeng Yang , Julien Kimmig , Stephen Pates , Paul G. Jamison , Shuhan Ma","doi":"10.1016/j.asd.2025.101448","DOIUrl":"10.1016/j.asd.2025.101448","url":null,"abstract":"<div><div><em>Caryosyntrips</em> is a relatively rare but long-lived and geographically widespread radiodont genus with specimens reported from Cambrian Stage 4 to the Drumian of Gondwana and Laurentia. Most of the currently known specimens are from the Wulian to Drumian deposits of North America and only one specimen is known from Stage 4 of Gondwana. Here, two new specimens are reported. The first one is a <em>C.</em> cf. <em>Caryosyntrips serratus</em> appendage from the Malong Biota of China (Cambrian, Series 2, Stage 3), which also represents the first reported occurrence of <em>Caryosyntrips</em> from China. The second appendage is from the Spence Shale Member (Cambrian, Miaolingian, Wuliuan) of Utah, USA and shares characters with both <em>Caryosyntrips camurus</em> and <em>Caryosyntrips durus</em>. This new specimen indicates that characters previously used to diagnose species might instead reflect intraspecific variation, however confirmation of this depends on discovery of new material. These new finds increase the temporal range of the genus into Cambrian Stage 3 and the specimen from the Malong Biota significantly increases the geographical range of the genus, with its first occurrence in China. In addition to the description of the new material we also discuss the function of the appendages in <em>Caryosyntrips</em> and the ecology of the genus.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"87 ","pages":"Article 101448"},"PeriodicalIF":1.7,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolution and homology of leg segments in Chelicerata: Evo-devo solutions to century-old challenges Chelicerata腿节的进化和同源性：进化-进化解决百年挑战

IF 1.7 3区农林科学

Arthropod Structure & Development Pub Date : 2025-04-30 DOI: 10.1016/j.asd.2025.101446

Benjamin C. Klementz , Georg Brenneis , Ethan M. Laumer , Sophie M. Neu , Mark S. Harvey , Prashant P. Sharma

{"title":"Evolution and homology of leg segments in Chelicerata: Evo-devo solutions to century-old challenges","authors":"Benjamin C. Klementz , Georg Brenneis , Ethan M. Laumer , Sophie M. Neu , Mark S. Harvey , Prashant P. Sharma","doi":"10.1016/j.asd.2025.101446","DOIUrl":"10.1016/j.asd.2025.101446","url":null,"abstract":"<div><div>A major theme in the evolution of Arthropoda is the origin and diversification of jointed appendages. One appealing framework for the evolution of arthropod appendage diversity has long been that a small network of homologous genes in the panarthropod ancestor established and subdivided the proximo-distal (PD) appendage axis, with lineage-specific modifications of these genes’ expression domains resulting in novel types of appendages. A corollary of this idea is the inference that each segment in the arthropod leg can be directly homologized to other such segments, based on anatomical or developmental genetic landmarks. Here, we explore the evolution of leg segments in Chelicerata, a group which exhibits marked diversity in leg architecture and number of leg segments, and thereby poses a greater challenge to the exercise of assigning segmental homologies. Focusing on the controversial nomenclature of leg segments in Pycnogonida (sea spiders), we identify potential markers of positional homology in different parts of the sea spider and arachnid PD axis, using comparative gene expression data. Nevertheless, we identify caveats to the use of transcription factor expression domains as landmarks for inference of positional homology, highlighting cases where datasets conflict in homology assignment. We postulate that the utility of gene expression data for inferring homologies is a function of phylogenetic distance.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":"87 ","pages":"Article 101446"},"PeriodicalIF":1.7,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0