Zoologischer Anzeiger最新文献

{"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 ,&nbsp;Arnau Calatayud-Mascarell ,&nbsp;Álvaro Pérez-Gómez ,&nbsp;Mattia Giacomelli ,&nbsp;Arturo Iglesias Baquero ,&nbsp;Maite Mojica ,&nbsp;Juan José Guerrero ,&nbsp;Miquel A. Arnedo ,&nbsp;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 <em>Cebrennus</em>.</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 <em>Cebrennus</em> from specimens collected in eastern Spain. Additionally, we use genetic data to place the new species, <em>Cebrennus herculis</em> 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 <em>C. herculis</em> sp. n. were low for the three molecular markers analysed (COI, 18S and 28S). Our phylogenetic tree recovered the monophyly of the Iberian <em>Cebrennus</em>, and placed them as sister to the only African representative with genetic data available, <em>Cebrennus rungsi</em>. Furthermore, divergence time analysis revealed a Palaeogene-Neogene split between the Iberian lineage and <em>C. rungsi,</em> 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":"2025-09-01","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}

{"title":"Taxonomy and systematics of Lepidodermella (Gastrotricha: Chaetonotidae): New species, new records, neotype designation and molecular data from Brazil","authors":"Axell Kou Minowa ,&nbsp;Kelly Fernanda Acosta Salgado ,&nbsp;Sindy Cabarca ,&nbsp;André Rinaldo Senna Garraffoni","doi":"10.1016/j.jcz.2025.07.001","DOIUrl":"10.1016/j.jcz.2025.07.001","url":null,"abstract":"<div><div>Gastrotricha are key components of the meiofaunal communities in diverse aquatic environments worldwide. Despite their ubiquity, knowledge of their diversity remains limited, particularly in Neotropical freshwater ecosystems. This study examines the genus <em>Lepidodermella</em> Blake, 1933 in Brazil, designating a neotype for <em>Lepidodermella broa</em> Kisielewski, 1991 based on material collected from <em>locus typicus,</em> and describing a new species, <em>Lepidodermella pirakitan</em> sp. nov., from sampling sites in the state of Ceará and São Paulo. The new species is characterized by a distinctive cuticular armature, with geometrically shaped smooth scales covering the dorsal head, neck, and trunk, distinguishing it from other congeners. Molecular analyses of ribosomal and mitochondrial genes reassessed the phylogenetic position of <em>Lepidodermella</em> species, revealing that the monophyly of the genus was not supported. We also updated the dichotomous key for freshwater species of the genus, incorporating the newly described species and updated distributional data.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 38-52"},"PeriodicalIF":1.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611816","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}

{"title":"Revealing new taxa and biogeographic patterns in shallow and deep-sea Marginellidae gastropods of the Southwestern Atlantic","authors":"Valeria Teso ,&nbsp;Fabrizio Scarabino ,&nbsp;Leonel Pacheco ,&nbsp;Guido Pastorino","doi":"10.1016/j.jcz.2025.07.002","DOIUrl":"10.1016/j.jcz.2025.07.002","url":null,"abstract":"<div><div>A comprehensive morphological analysis of Marginellidae species from shallow to deep waters off Uruguay and Argentina is presented, incorporating both traditional techniques and geometric morphometrics. Shell microstructure, radulae, protoconch, and penes are described and illustrated using SEM images. The effectiveness of geometric morphometrics in species discrimination is demonstrated. In the study area, the family includes nine living species-six of them new-distributed among four genera, including <em>Pustinella</em> gen. nov. These are <em>Prunum martini</em>, <em>Prunum rubens</em>, <strong><em>Prunum juancarlosi</em> sp. nov.</strong>, <em>Volvarina warrenii</em>, <strong><em>Volvarina castanea</em> sp. nov.</strong>, <strong><em>Volvarina acicularis</em> sp. nov.</strong>, <strong><em>Volvarina abyssalis</em> sp. nov.</strong>, <strong><em>Pustinella cymatilis</em> gen. et sp. nov.</strong>, and <strong><em>Pustinella felidamia</em> gen. et sp. nov.</strong> These species are restricted to the Southwestern Atlantic, ranging from Rio de Janeiro, Brazil, to Burdwood Bank (∼54°S), Argentina. Five of the new species inhabit exclusively deep waters, down to 2457 m, while the remaining four occur on the continental shelf. Additionally, two poorly known antarctic species, <em>Marginella hyalina</em> and <em>Marginella ealesae</em> are compared and included in <em>Pustinella</em> gen. nov. Lectotype is designed for <em>Marginella fraterculus</em>, a synonym of <em>P</em>. <em>martini</em>, and <em>Marginella dozei</em> is proposed as a new synonym of <em>V</em>. <em>warrenii</em>. Geographic and bathymetric distributions of all species are detailed based on field observations and museum records. Deep-sea species show patterns of aggregation influenced by specific marine currents, whereas shelf species correspond to the Argentine and Magellanic provinces.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 77-105"},"PeriodicalIF":1.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722386","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}

{"title":"Integrative taxonomy revealing microendemic species of Cambeva (Siluriformes: Trichomycteridae) in streams draining Serra da Canastra, southeastern Brazil","authors":"Wilson J.E.M. Costa ,&nbsp;Valter M. Azevedo-Santos ,&nbsp;José Leonardo O. Mattos ,&nbsp;Pedro L.C. Uzeda ,&nbsp;Paulo J. Vilardo ,&nbsp;Felipe P. Ottoni ,&nbsp;Axel M. Katz","doi":"10.1016/j.jcz.2025.07.003","DOIUrl":"10.1016/j.jcz.2025.07.003","url":null,"abstract":"<div><div>A large concentration of endemic trichomycterine catfish species has been recorded in mountainous regions of southeastern Brazil. The present study aims to investigate the taxonomic status of populations of the <em>Cambeva variegata</em> complex (CVC) in streams situated in a narrow strip between the Serra da Canastra and the right bank of the Rio Grande. Here we combined results of unilocus species delimitation analyses (GMYC, PTP, ASAP using CYTB, 1025 bp) with morphological data (external morphology and osteology). All analyses yielded identical results, delimiting four new species in the study area. The resulting tree topology indicated that the species from the study area do not form a monophyletic group. The new species were diagnostic by combinations of morphological characteristics, as well as unique nucleotide substitutions, besides occasionally, when possible, by unique morphological character states. The occurrence of four short-ranged species in neighbouring areas indicates a case of micro-endemism, which is of great importance for biodiversity conservation, since micro-endemic species are often more susceptible to extinction and at least three of these species occur in environments with clear signs of habitat degradation. Further studies are needed to precisely determine conditions and geographical extent of their habitats.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 1-15"},"PeriodicalIF":1.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144562864","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}

{"title":"Global diversity of mysids (Crustacea: Mysida) in lagoonal waters","authors":"Rofiza Yolanda ,&nbsp;Mulyadi ,&nbsp;W. Wayne Price","doi":"10.1016/j.jcz.2025.08.002","DOIUrl":"10.1016/j.jcz.2025.08.002","url":null,"abstract":"<div><div>A global compilation of mysid shrimp species found in coastal and atoll lagoons was conducted based on published records. The lagoonal species represent around 15 % (181 species) of the species in the Order Mysida and are found in 6 continents and one Micronesian region, excluding limans and Ponto-Caspian region. The species belong to one family (Mysidae), seven subfamilies (Erythropinae, Gastrosaccinae, Heteromysinae, Leptomysinae, Mysinae, Rhopalophthalminae and Siriellinae) and 16 tribes. The subfamily Mysinae Haworth, 1825 was the highest in species richness (66 spp.), while Heteromysinae Norman, 1892 was the lowest (5 spp.). The genus <em>Siriella</em> Dana, 1850 is predominant (30 spp.) among the 49 genera. The European continent has the highest species richness (39 spp.) in coastal lagoons and Micronesia, a region with no coastal lagoons, has the lowest (0). In contrast, Australia/New Zealand has the highest species (26 spp.) in atoll lagoon, while there are no records of atolls from European and South America continents. A significant strong correlation was found between number of surveyed lagoons and mysid species richness. Europe appears to have received the greatest research attention with respect to mysid species richness while South America and the Indo-West Pacific atolls have received the least. There is a clear separation of the species assemblages of lagoonal mysids among continents/region into two main clusters based on hierarchical cluster analysis, the first cluster is the North America with South America, and the second one is the other continents/region.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 152-164"},"PeriodicalIF":1.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902409","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}

{"title":"Morphological description and morphometry of the nymphal instars of five species of Rhodnius Stål, 1859 (Hemiptera: Reduviidae: Triatominae)","authors":"Jociel Klleyton Santos Santana ,&nbsp;Jader de Oliveira ,&nbsp;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><em>Rhodnius</em> is a genus with unresolved taxonomic questions. These insects are potential vectors of <em>Trypanosoma</em> 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 <em>R</em>. <em>montenegrensis</em>, <em>R</em>. <em>nasutus</em>, <em>R</em>. <em>neglectus</em>, <em>R</em>. <em>neivai</em>, and <em>R</em>. <em>stali</em>. 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 &lt; 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 <em>Rhodnius</em> 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":"2025-09-01","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}

{"title":"Ecological and biogeographic drivers of speciation in neotropical hognose pit vipers, Porthidium (Squamata, Viperidae)","authors":"Carlos Patron-Rivero ,&nbsp;Carlos Yañez-Arenas ,&nbsp;Xavier Chiappa-Carrara ,&nbsp;Octavio Rojas-Soto ,&nbsp;Sara Ruane ,&nbsp;Lázaro Guevara","doi":"10.1016/j.jcz.2025.07.007","DOIUrl":"10.1016/j.jcz.2025.07.007","url":null,"abstract":"<div><div>The neotropical hognose pit vipers (<em>Porthidium</em>) represent an ideal system for studying how ecological and geographic factors drive speciation. This genus encompasses nine species distributed across diverse environments in North, Central and northern South America, with two distinct clades suggesting historical ecological differentiation. Using a time-calibrated phylogeny and occurrence data, we tested whether speciation was driven by niche conservatism or divergence, and assessed the role of major biogeographic barriers. Niche overlap analyses revealed no or low similarity between species (mean <em>D</em> = 0.12, <em>I</em> = 0.24, Jaccard full background = 0.02 and Jaccard union background = 0.06). Our null models confirm an indistinct niche overlap between sister species and random species, indicating speciation through ecological divergence. Speciation was shaped by three major barriers: the Nicaraguan Depression (∼10 Mya), the Motagua-Polochic Fault (∼7.7 Mya), and the Isthmus of Tehuantepec (∼3.1–3.5 Mya) indicating an ancestral range in the Pacific dominion by all models, while additionally Páramo and Yucatan Peninsula province by the Bayesian approach. Our findings demonstrate that <em>Porthidium</em> speciation was driven by niche divergence rather than conservatism, with geographic barriers promoting parapatric speciation for non-endemic <em>Porthidium</em> species and sympatric speciation for endemic species. This integrated framework provides new insights into how ecological adaptation and physical barriers interact during rapid radiations in Neotropical vertebrates.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 65-76"},"PeriodicalIF":1.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702311","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}

{"title":"Definition of the pygmy grasshopper subfamily Criotettiginae (Orthoptera: Tetrigidae) with a preliminary catalogue of genera","authors":"Madan Subedi ,&nbsp;Niko Kasalo ,&nbsp;Josip Skejo","doi":"10.1016/j.jcz.2025.08.003","DOIUrl":"10.1016/j.jcz.2025.08.003","url":null,"abstract":"&lt;div&gt;&lt;div&gt;A new pygmy grasshopper subfamily is established, Criotettiginae Kevan, 1966 &lt;strong&gt;subfam. nov&lt;/strong&gt;. to include 24 genera—&lt;em&gt;Acanthalobus&lt;/em&gt; Hancock, 1904, &lt;em&gt;Afrocriotettix&lt;/em&gt; Günther, 1938b, &lt;em&gt;Amphinotulus&lt;/em&gt; Günther, 1939, &lt;em&gt;Apterotettix&lt;/em&gt; Hancock, 1904, &lt;em&gt;Aryalidonta&lt;/em&gt; Subedi &amp; Kasalo, 2023, &lt;em&gt;Bolivaritettix&lt;/em&gt; Günther, 1939, &lt;em&gt;Bolotettix&lt;/em&gt; Hancock, 1907, &lt;em&gt;Cotysoides&lt;/em&gt; Zheng &amp; Jiang, 2000, &lt;em&gt;Criotettix&lt;/em&gt; Bolívar, 1887, &lt;em&gt;Dasyleurotettix&lt;/em&gt; Rehn, 1904, &lt;em&gt;Eucriotettix&lt;/em&gt; Hebard, 1930, &lt;em&gt;Hyboella&lt;/em&gt; Hancock, 1915, &lt;em&gt;Indomiriatra&lt;/em&gt; Tinkham, 1939, &lt;em&gt;Loxilobus&lt;/em&gt; Hancock, 1904, &lt;em&gt;Miriatroides&lt;/em&gt; Zheng &amp; Jiang, 2002, &lt;em&gt;Probolotettix&lt;/em&gt; Günther, 1939, &lt;em&gt;Rhopalina&lt;/em&gt; Tinkham, 1939, &lt;em&gt;Rostella&lt;/em&gt; Hancock, 1913, &lt;em&gt;Spadotettix&lt;/em&gt; Hancock, 1910, &lt;em&gt;Syzygotettix&lt;/em&gt; Günther, 1938b, &lt;em&gt;Tettitelum&lt;/em&gt; Hancock, 1915 (tentative assignment), &lt;em&gt;Thoradonta&lt;/em&gt; Hancock, 1909, &lt;em&gt;Timoritettix&lt;/em&gt; Günther, 1971 and &lt;em&gt;Yunnantettix&lt;/em&gt; Zheng, 1995. The new subfamily is defined based on clear morphological apomorphies and previously published phylogenetic data evidencing a well-supported clade. Members of this subfamily have until now been scattered across the Tetrigidae subfamilies—Cladonotinae (&lt;em&gt;Yunnantettix&lt;/em&gt;), Metrodorinae (&lt;em&gt;Cotysoides, Hyboella, Indomiriatra, Miriatroides, Rostella, and Timoritettix&lt;/em&gt;), and Tetriginae (&lt;em&gt;Afrocriotettix&lt;/em&gt;)—or have been without subfamily assignment (&lt;em&gt;Bolotettix, Probolotettix, Syzygotettix, Tettitelum&lt;/em&gt;). Criotettiginae consists of tribes Criotettigini and Thoradontini, the monophyly of which has to be tested. Ten new combinations are proposed—(1) &lt;em&gt;Acanthalobus afghanus&lt;/em&gt; (Čejchan, 1969) &lt;strong&gt;comb. nov.&lt;/strong&gt; for &lt;em&gt;Criotettix afghanus&lt;/em&gt; (2) &lt;em&gt;Acanthalobus gidhavensis&lt;/em&gt; (Gupta &amp; Chandra, 2018) &lt;strong&gt;comb. nov.&lt;/strong&gt; for &lt;em&gt;Criotettix gidhavensis&lt;/em&gt;; (3) &lt;em&gt;Acanthalobus gariyabandicus&lt;/em&gt; (Gupta &amp; Chandra, 2018) &lt;strong&gt;comb. nov.&lt;/strong&gt; for &lt;em&gt;Criotettix gariyabandicus;&lt;/em&gt; (4) &lt;em&gt;Acanthalobus latifrons&lt;/em&gt; (Hebard, 1930) &lt;strong&gt;comb. nov.&lt;/strong&gt; for &lt;em&gt;Criotettix latifrons&lt;/em&gt;; (5) &lt;em&gt;Aryalidonta subulata&lt;/em&gt; (Bolívar, 1887) &lt;strong&gt;comb. nov.&lt;/strong&gt; for &lt;em&gt;Criotettix subulatus&lt;/em&gt;; (6) &lt;em&gt;Loxilobus convexus&lt;/em&gt; (Deng, Zheng &amp; Wei, 2007) &lt;strong&gt;comb. nov&lt;/strong&gt;. for &lt;em&gt;Mazarredia convexa,&lt;/em&gt; (7) &lt;em&gt;Loxilobus convexaoides&lt;/em&gt; (Deng &amp; Zheng, 2015) &lt;strong&gt;comb. nov&lt;/strong&gt;. for &lt;em&gt;Mazarredia convexaoides&lt;/em&gt;; (8) &lt;em&gt;Loxilobus shiwanshanensis&lt;/em&gt; (Deng &amp; Zheng, 2015) &lt;strong&gt;comb. nov&lt;/strong&gt;. of &lt;em&gt;Mazarredia shiwanshanensis&lt;/em&gt;; (9) &lt;em&gt;Loxilobus neesoon&lt;/em&gt; (Tan et Storozhenko, 2018) &lt;strong&gt;comb. nov&lt;/strong&gt;. for &lt;em&gt;Eucriotettix neesoon&lt;/em&gt;; (10) &lt;em&gt;Loxilobus simulans&lt;/em&gt; (Tan et Storozhenko, 2017) for &lt;em&gt;Eucriotettix simulans&lt;/em&gt;; and (11) &lt;em&gt;Yunnantettix yunnanensis&lt;/em&gt; (Zheng, 1993) &lt;strong&gt;c","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 133-151"},"PeriodicalIF":1.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858303","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}

{"title":"An unusual new species at risk, parasite of a critically endangered guitarfish, Pseudobatos horkelii (Elasmobranchi: Rhinobatidae): insights into the phylogeny of Acanthobothrium (Cestoda: Onchoproteocephalidea)","authors":"Manuel M. Irigoitia ,&nbsp;Sebastián Franzese ,&nbsp;Ana J. Alarcos ,&nbsp;Nathalia J. Arredondo ,&nbsp;Juan T. Timi","doi":"10.1016/j.jcz.2025.07.008","DOIUrl":"10.1016/j.jcz.2025.07.008","url":null,"abstract":"<div><div>Guitarfishes comprise a group of elasmobranchs with a high risk of extinction and whose parasite fauna is largely unknown in the Southwest Atlantic Ocean. The genus <em>Acanthobothrium</em> is one of the most diverse groups of cestodes from elasmobranchs. In the present study, the erection of the new species <em>Acanthobothrium goleketen</em> n. sp., parasitizing <em>Pseudobatos horkelii</em>, is proposed based on both morphological and molecular characters. The new species is assigned to the morphological category 3 and is differentiated morphologically from all congeners in that category and those of the related category 4 by the type of apolysis, total length, number of proglottids, scolex configuration, size of various bothridial structures, length of cephalic peduncle and number of testes. Knowledge about the phylogenetic relationships among <em>Acanthobothrium</em> species is still incipient. This study discusses the interspecific relationships of all formally described and sequenced species of <em>Acanthobothrium</em> on the basis of phylogenetic reconstructions using Bayesian Inference, Maximum Likelihood and Maximum Parsimony. No apparent phylogenetic pattern was observed among species with geographical affinity or species from closely related hosts. In contrast, some species with morphological similarities were grouped in highly supported clades. The new species was catalogued as Critically Endangered in accordance with the status of its host. The great diversity of chondrichthyans in the Argentine Sea and the lack of information about their parasite fauna, highlight the need to increase diversity studies and complete the assignment of conservation categories.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 120-131"},"PeriodicalIF":1.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780805","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}

{"title":"Seek and describe: An integrative description of a new species of Ornamentula (Gastrotricha: Paucitubulatina)","authors":"Cecília Sochiarelli,&nbsp;Axell Kou Minowa,&nbsp;André Rinaldo Senna Garraffoni","doi":"10.1016/j.jcz.2025.07.009","DOIUrl":"10.1016/j.jcz.2025.07.009","url":null,"abstract":"<div><div>Most gastrotrichs are obligate benthic or periphytic organisms, typically associated with sediment and aquatic vegetation; however, some exceptions exhibit a semiplanktonic lifestyle, such as members of the genus <em>Ornamentula</em> Kisielewski, 1991 (family Dasydytidae Daday, 1905). Here, we describe the third species of the genus, discovered in a lake in southeastern Brazil, using an integrative taxonomy approach. Our description is based on morphological data obtained through optical microscopy and the first high-resolution electron microscope imagery of <em>Ornamentula</em> species, as well as genetic data from nuclear ribosomal 18S and 28S loci and mitochondrial COI. <em>Ornamentula sanctipetri</em> sp. nov. differs from its congeners by the presence of asymmetrical dorsal scales, longer cephalic ciliation, an additional third transverse row of scales on the dorsal neck, and additional scales in the ventral trunk interciliary region. Molecular evidence supports the monophyly of the genus, although Dasydytidae is non monophyletic as presently constituted because Neogosseidae nested within it. An updated identification key for the <em>Ornamentula</em> genus is provided to facilitate future research.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"318 ","pages":"Pages 106-119"},"PeriodicalIF":1.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724479","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}