CladisticsPub Date : 2025-10-08DOI: 10.1111/cla.70010
Fengmao Yang, Shaojun Ling, Ruxuan Yang, Fang Wen, Wei Gu, Xiangzhou Hu, Liewen Lin, Yizhi Wang, Jie Cai, Mingxun Ren, Michael Möller, Lei Cai
{"title":"Phylogenomic reconstruction reveals deep reticulate evolutionary history and polyphyletic genus (Boeica) in the subtribe Leptoboeinae (Gesneriaceae), with description of a novel genus.","authors":"Fengmao Yang, Shaojun Ling, Ruxuan Yang, Fang Wen, Wei Gu, Xiangzhou Hu, Liewen Lin, Yizhi Wang, Jie Cai, Mingxun Ren, Michael Möller, Lei Cai","doi":"10.1111/cla.70010","DOIUrl":"https://doi.org/10.1111/cla.70010","url":null,"abstract":"<p><p>The subtribe Leptoboeinae (Gesneriaceae) has undergone numerous taxonomic revisions due to ambiguous generic boundaries, complicating conservation and utilization efforts. In this study, we employed transcriptomes from a representative clade within the subtribe to construct a low-copy nuclear (LCN) gene data set. Plastid genomes and LCN genes, assembled from 66 samples, were used to investigate the phylogenetic structure, reticulate evolution and divergence times among the species of this subtribe. Firstly, phylogenetic analysis revealed that Boeica is polyphyletic and identified a new genus, Crassicaulis, which forms a sister group to the remaining genera within the subtribe. Secondly, complex cytonuclear conflicts and gene tree incongruence at genus-level nodes were identified. Multiple lines of evidence revealed two reticulate evolutionary events within this lineage, suggesting that Boeica porosa and B. stolonifera, as well as Boeica enpingensis, underwent hybridization during their speciation processes. Finally, divergence time estimation revealed that most genera emerged between 17 and 12 Ma. This study provides a well-resolved phylogenetic framework for the subtribe Leptoboeinae, describes a new genus and elucidates the subtribe's intricate reticulate evolutionary history. Furthermore, we propose that the mid-Miocene East Asian monsoon played a pivotal role in the diversification of this lineage.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":" ","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145253568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Integrating morphological and phylogenomic data reveals the taxonomic puzzles, incongruence in phylogenies and cryptic species in Allium section Bromatorrhiza Ekberg.","authors":"Yuan Wang, Rui-Yu Cheng, Wei-Yan Tan, Jia-Hui Sun, Jin-Bo Tan, Yan Yu, Song-Dong Zhou, Xing-Jin He, Deng-Feng Xie","doi":"10.1111/cla.70012","DOIUrl":"https://doi.org/10.1111/cla.70012","url":null,"abstract":"<p><p>Phylogenomic data from enriched informative loci yield higher resolution insights for clarifying taxonomic relationships and reconstructing the evolutionary histories of complex taxa. Section Bromatorrhiza (Allium, Amaryllidaceae), a small taxon of 11 species, has long been plagued by taxonomic controversies and persistent, unresolved phylogenetic incongruence. Here, we collected transcriptome and plastome data from 34 samples representing multiple populations across all species in this section. From these, 1993 low-copy nuclear genes and 110 plastid genes were extracted for phylogenetic reconstruction. Integrating phylogenomic and morphological approaches, we investigated species relationships and the causes of phylogenetic discordance. Our results provide robust clarification of interspecific relationships and identify 10 diagnostic morphological traits in this section. The Allium hookeri Alliance (AHA) was resolved as a monophyletic clade comprising seven species. We elevated Allium hookeri var. muliense to species status, formally describing it as A. muliense, and newly describe a cryptic species as Allium xui Y. Wang, D.F. Xie & X.J. He, sp. nov. Furthermore, we demonstrate that extensive phylogenetic discordance within this section is primarily attributable to incomplete lineage sorting (ILS) and reticulate evolution. By synthesizing phylogenetic and morphological evidence, we propose refined taxonomic treatments. Our findings resolve long-standing taxonomic ambiguities and phylogenetic discordance in section Bromatorrhiza.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":" ","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145253518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CladisticsPub Date : 2025-09-13DOI: 10.1111/cla.70011
Daniel Fernández Marchán, Sylvain Gérard, Alejandro Martínez Navarro, Alberto Piris, Mickaël Hedde, Thibaud Decaëns, Marta Novo
{"title":"They come in all sizes: integrative systematics and morphological radiation of Scherotheca (Lumbricidae, Crassiclitellata).","authors":"Daniel Fernández Marchán, Sylvain Gérard, Alejandro Martínez Navarro, Alberto Piris, Mickaël Hedde, Thibaud Decaëns, Marta Novo","doi":"10.1111/cla.70011","DOIUrl":"https://doi.org/10.1111/cla.70011","url":null,"abstract":"<p><p>Scherotheca is amongst the most diverse earthworm genera within Lumbricidae, exhibiting striking ecomorphological radiation-from small epigeic-like forms to giant anecic species. Accurate systematics is critical for exploring such diversification. We sequenced 16 previously unrepresented species plus additional populations across their range for five molecular markers, inferring phylogenetic relationships via maximum likelihood, Bayesian inference and time-calibrated analyses, as well as ancestral area and character state reconstructions. Scherotheca was recovered as monophyletic, but previous subgeneric divisions were unsupported. With the addition of four new species, Scherotheca currently includes 56 species: Cryptic diversity within Scherotheca aquitania may increase this number upon further research. Biogeographic analyses supported a middle Eocene origin (~47 Mya) on the Corsica-Sardinia-Provence microplate, followed by westward expansion driven by paleogeographic events, such as Pyrenean uplift and marine introgressions. Multiple Corsican clades evolved independently, displaying morphological radiation under insular pressures. Ancestral reconstructions indicated the last common ancestor resembled the mid-sized Scherotheca portcrosana. The radiation of body size was particularly pronounced in Atlantic regions, likely shaped by ecological, climatic and biotic pressures. This study provides the most comprehensive evolutionary framework for Scherotheca, serving as a reference for further research on Western European earthworm diversification, functional trait evolution and biogeographic history.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":" ","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Decoding the phylogeny of the genus Merodon Meigen (Diptera, Syrphidae): a synergistic approach with molecular and morphological data.","authors":"Sanja Veselić, Ante Vujić, Snežana Radenković, Ljiljanać Šašić Zori, Mihajla Djan, Gunilla Ståhls","doi":"10.1111/cla.70009","DOIUrl":"https://doi.org/10.1111/cla.70009","url":null,"abstract":"<p><p>The genus Merodon (Diptera: Syrphidae) is the most species-rich hoverfly genus in Europe. Recent studies have focused on resolving species-level taxonomy, species delimitation, or phenotypic traits analyses, but only a few authors have dealt with its intra-generic phylogenetic relationships. In this study, we compiled a dataset of adult morphological characters capturing the phylogenetically informative characters for the genus Merodon, as well as the most closely related co-tribal taxa. We also generated molecular data for a set of genes frequently used for molecular systematic studies of insects. Molecular and morphological datasets were analysed together to establish the formal subgeneric classification of Merodon using parsimony and maximum likelihood approaches. For the molecular dataset, the mitochondrial COI and nuclear 28S rRNA and 18S rRNA gene sequences were used, a total of 2947 bp. For the morphological dataset, 204 characters were analysed. The combined analysis involved 3151 characters and 80 taxa. Our analyses supported five subgenera within the genus Merodon described and diagnosed here: Albimerodon subgen. nov., Auremerodon subgen. nov., Avidumerodon subgen. nov., Desutumerodon subgen. nov., and Natamerodon subgen. nov.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":" ","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144977032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CladisticsPub Date : 2025-08-25DOI: 10.1111/cla.70008
Denis Copilaș-Ciocianu, Ivan Marin, Eglė Šidagytė-Copilas, Gavril Marius Berchi, Konul Ahmadova, Levan Mumladze, Dan V Palcu Rolier, Dmitry Palatov, Arthur F Sands
{"title":"Marine and inland biogeographical processes shaped Earth's singular brackish biodiversity hotspot.","authors":"Denis Copilaș-Ciocianu, Ivan Marin, Eglė Šidagytė-Copilas, Gavril Marius Berchi, Konul Ahmadova, Levan Mumladze, Dan V Palcu Rolier, Dmitry Palatov, Arthur F Sands","doi":"10.1111/cla.70008","DOIUrl":"https://doi.org/10.1111/cla.70008","url":null,"abstract":"<p><p>Life radiated in aquatic environments worldwide. Brackish waters, however, seemingly hinder diversification as their physiologically demanding environmental stochasticity favours transient and impoverished communities assembled from widespread generalist species. Yet, the Ponto-Caspian basin (Aral, Azov, Black and Caspian seas) defies this rule, its rich endemic biota representing the only brackish biodiversity hotspot on Earth. Nevertheless, its origin, age and biogeographic history remain contentious. Here, we reconstruct the evolutionary timescale and diversification dynamics of gammaroidean amphipods, the most diverse Ponto-Caspian faunal group. We show that amphipods started radiating 11 Myr ago when the Paratethys Sea became isolated from the global ocean and stable brackish conditions ensued. Diversification proceeded steadily despite the subsequent water level fluctuations that persisted towards the end of the Miocene. The final Paratethyan Pliocene dissolution into the isolated Black and Caspian seas, followed by their brief intermittent connections during the mid-late Pleistocene, sparked further diversification via dispersal-vicariance pulses. Lastly, a five times faster mitochondrial substitution rate was estimated relative to the typical arthropod rate. Despite the significant geo-environmental upheaval, amphipods show a remarkably continuous evolutionary history shaped by a unique interplay between marine and inland biogeographical processes, highlighting that brackish water can support diverse and enduring evolutionary radiations.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":" ","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144977016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mitogenomics provide insights into the tribe-level systematics and historical phylogeography of band-winged grasshoppers (Orthoptera: Acrididae: Oedipodinae).","authors":"Wenhui Zhu, Delong Guan, Zhenning Chen, Lara-Sophie Dey, Huateng Huang, Xuejuan Li, Jeanne Agrippine Yetchom Fondjo, Oliver Hawlitschek, Zhiqiang Zhang, Martin Husemann, Sheng-Quan Xu","doi":"10.1111/cla.70006","DOIUrl":"https://doi.org/10.1111/cla.70006","url":null,"abstract":"<p><p>Oedipodinae (Acrididae) is a species-rich and globally distributed subfamily of grasshoppers, currently comprising 807 valid species assigned to 138 genera in 16 tribes. Resolving the phylogeny of Oedipodinae has proven difficult, owing to their extensive species diversity, disjunct geographic distribution and the scarcity of informative molecular markers. To establish a more robust phylogenetic framework, we conducted a mitochondrial phylogenomic analysis of 143 mitogenomes. This dataset includes 103 Oedipodinae species representing all 16 currently recognized tribes, of which 86 mitogenomes from nine tribes were newly sequenced in this study. Divergence times and ancestral areas were also inferred to investigate evolutionary trends within this subfamily. The phylogenetic analysis supports the monophyly of nine tribes within Oedipodinae: Acrotylini, Anconiini, Bryodemini, Chortophagini, Machaerocerini, Psinidiini, Trilophidiini, Trimerotropini and Tropidolophini. Based on these results, we propose taxonomic revisions. The tribe Tropidolophini Otte, 1995 is removed from Oedipodinae and provisionally placed in Acrididae, incertae sedis. In addition, the genus Ceracris Walker, 1870 is removed from Parapleurini and placed in Acridinae, incerta sedis. Divergence time estimation suggests that Oedipodinae originated during the Eocene, approximately 49 Mya. The biogeographic reconstruction supports a Holarctic origin of Oedipodinae, with the Palaearctic region as the principal center of diversification, followed by subsequent dispersal into North America, the Oriental region and Africa. These patterns highlight the role of dispersal in shaping the global distribution of the subfamily.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":" ","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144800863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CladisticsPub Date : 2025-07-28DOI: 10.1111/cla.70005
Christoph G. Höpel, Shane T. Ahyong, Martin Kapun, Martin Schwentner, Stefan Richter
{"title":"Phylogeography of the Anaspides richardsoni species clade (Anaspidacea, Anaspidesidae): glaciation and recolonization of the Tasmanian Central Plateau and the question of paraphyletic species","authors":"Christoph G. Höpel, Shane T. Ahyong, Martin Kapun, Martin Schwentner, Stefan Richter","doi":"10.1111/cla.70005","DOIUrl":"10.1111/cla.70005","url":null,"abstract":"<p>We herein present a phylogenetic and population genetic analysis of a Tasmanian Mountain Shrimp clade, based on ddRAD and cytochrome oxidase subunit-1 data sets. Our data show that the morphologically well-delineated and widespread <i>Anaspides richardsoni</i> Ahyong, 2016 is paraphyletic with respect to four other species (<i>A. eberhardi</i> Ahyong, 2016, <i>A. spinulae</i> Williams, 1965 and two undescribed species). These four species all form discrete (monophyletic) lineages and exhibit clear morphological distinctions in relation to <i>A. richardsoni</i> and to one another. However, we detect signals of introgression between some populations of <i>A. richardsoni</i>, <i>A. spinulae</i> and an undescribed species. We also find two instances of syntopic occurrences without evidence for interbreeding. Also, <i>A. richardsoni</i> is split into several allopatric and comparably old lineages. <i>Anaspides spinulae</i> from Lake St. Clair, however, seems to be a young species that might have differentiated only after the last glacial maximum of central Tasmania (22 000–17 000 years ago). Moreover, we analyse the present population structure and recolonization of the Central Plateau and Western Mountain Ranges in regard to their glacial history. We distinguish several glacial refugia and show that the recolonization most likely occurred only from one or two of these.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":"41 5","pages":"470-492"},"PeriodicalIF":6.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/cla.70005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144735090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CladisticsPub Date : 2025-07-14DOI: 10.1111/cla.70003
Karine Gotty, Yohan Pillon
{"title":"The family classification of the New Caledonian angiosperms has become more stable with the application of the APG system","authors":"Karine Gotty, Yohan Pillon","doi":"10.1111/cla.70003","DOIUrl":"10.1111/cla.70003","url":null,"abstract":"<p>The era of molecular systematics has had a tremendous impact on taxonomy, with the increasing availability of phylogenetic trees allowing the recircumscription of higher taxa, particularly through the application of the monophyletic principle. Whether molecular phylogenetics has caused taxonomic instability has not been objectively assessed. Here, we used the flora of New Caledonia to monitor the evolution of the taxonomy of a tropical flora through four time windows from 1911 to 2024. This Pacific island's flora is renowned for its high species richness and endemism and includes 42% of the currently accepted flowering plant families, including the endemic Amborellaceae. We found that taxonomic changes, including changes in genera and families, have always been common, even in the pre-molecular era. If family changes were more important between 2001 and 2012, following the application of the classification proposed by the Angiosperm Phylogeny Group (APG), changes since then have been reduced to almost zero. Since the latest versions of the APG classification are almost identical, it seems that this classification can now be safely applied outside the world of scientific publication. Greater efforts are needed to achieve a stable generic classification, where collectives similar to APG could target such goals.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":"41 5","pages":"463-469"},"PeriodicalIF":6.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/cla.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144627649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CladisticsPub Date : 2025-07-14DOI: 10.1111/cla.70004
Zohreh Pourghorban, Yasaman Salmaki, Tim Böhnert, Maximilian Weigend
{"title":"Towards a monophyletic Cynoglossum: a dated molecular phylogeny and historical biogeography of Cynoglossinae (Boraginaceae)","authors":"Zohreh Pourghorban, Yasaman Salmaki, Tim Böhnert, Maximilian Weigend","doi":"10.1111/cla.70004","DOIUrl":"10.1111/cla.70004","url":null,"abstract":"<p>Cynoglossoideae is the largest subfamily of Boraginaceae, and Cynoglosseae is its largest tribe, with the eponymous subtribe Cynoglossinae (ca. 200 spp.) being the most taxonomically challenging group. <i>Cynoglossum</i> remains problematic, especially regarding its relationships to a range of satellite genera (e.g. <i>Paracaryum</i>, <i>Lindelofia</i>, <i>Mattiastrum</i>, <i>Rindera</i>). We aim to elucidate the evolutionary relationships among Cynoglossinae and their historical biogeography by analyzing ca. 80 species of the subtribe. We employed PacBio sequencing of four plastid markers (<i>trnL–trnF</i>, <i>rps16</i>, <i>rpl16</i>, <i>trnK–psbA</i>) and one nuclear marker (nrITS), and reconstructed molecular phylogenies utilizing maximum parsimony, maximum likelihood, and Bayesian inference. Our analyses demonstrated a more highly resolved tree for the major clades of Cynoglossinae, strongly supporting a broader taxonomic circumscription of <i>Cynoglossum</i>. Our biogeographic reconstruction suggests that Cynoglossinae diverged from its sister group, Bothriosperminae, during the late Oligocene in East Asia and likely originated during the middle Miocene in an extensive area encompassing East Asia and the Irano-Turanian region. The lineage rapidly diversified, expanding its range towards Europe, including the Mediterranean region, and Africa, as well as southward to Australia from the middle Miocene to Pleistocene. The data indicate that the epichorous fruits of <i>Cynoglossum</i> have significantly contributed to multiple long-distance dispersal events and subsequent diversification.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":"41 5","pages":"427-447"},"PeriodicalIF":6.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144627650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CladisticsPub Date : 2025-07-10DOI: 10.1111/cla.70000
Qi Kou, Tin-Yam Chan, Matúš Hyžný, Xinzheng Li, Gary C. B. Poore
{"title":"Hunting the ghost: phylogenomic analyses reveal divergence, habitat transitions and character evolution of the ghost and mud shrimps (Decapoda: Axiidea)","authors":"Qi Kou, Tin-Yam Chan, Matúš Hyžný, Xinzheng Li, Gary C. B. Poore","doi":"10.1111/cla.70000","DOIUrl":"10.1111/cla.70000","url":null,"abstract":"<p>Understanding when and how habitat transitions occurred is essential for a comprehensive insight into the succession of marine ecosystem and biodiversity. Here we investigated the evolutionary process of an ancient, widespread and ecologically diversified lineage of marine benthic fauna, the ghost and mud shrimps (Decapoda: Axiidea). To reconstruct a robust, time-calibrated phylogeny of this intractable group, we sampled more comprehensively than in previous studies and utilized three types of sequencing data: Sanger, genome-skimming and ultra-conserved elements (UCEs). The UCEs tree supports a monophyletic Axiidea sister to the ‘Gebiidea + (Brachyura + Anomura)’ clade. Our findings reveal the monophyletic status of Callianideidae and Micheleidae, whereas Axiidae and Strahlaxiidae as presently understood are shown to be non-monophyletic. Axiidae s.s. is now restricted to four genera, Strahlaxiidae to one genus, with most former “axiid” genera reclassified under Calocarididae. We determine that crown axiidean shrimps diverged in the Middle Triassic, with a significant habitat transition from epibenthic to endobenthic during the Middle to Late Jurassic, possibly in response to environmental changes and available ecological niche. We hypothesize that the extreme morphological and behavioural adaptations to the obligate/subsurface burrowing life facilitated the radiation and diversification of ghost shrimps, despite some instances of adaptive convergence.</p>","PeriodicalId":50688,"journal":{"name":"Cladistics","volume":"41 5","pages":"448-462"},"PeriodicalIF":6.2,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144602165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}