Zoological Journal of the Linnean Society最新文献_第8页

Ontogeny and phylogeny of the anaerobic genus Urostomides with supplementing morphological characterization of the type and one little-known species (Alveolata: Ciliophora: Armophorea) 厌氧菌属（Urostomides）的本体和系统发育，以及模式种和一个鲜为人知的物种的补充形态特征（腔肠动物：纤毛虫：腕足动物

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-24 DOI: 10.1093/zoolinnean/zlae055

Xiaochen Feng, Wenbao Zhuang, Ran Li, Xiaozhong Hu

引用次数: 0

Divergent patterns of cranial suture fusion in marsupial and placental mammals 有袋类和胎盘类哺乳动物颅缝融合的不同模式

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-24 DOI: 10.1093/zoolinnean/zlae060

Heather E White, Abigail S Tucker, Anjali Goswami

{"title":"Divergent patterns of cranial suture fusion in marsupial and placental mammals","authors":"Heather E White, Abigail S Tucker, Anjali Goswami","doi":"10.1093/zoolinnean/zlae060","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae060","url":null,"abstract":"Cranial sutures, both open and closed, support a myriad of skull functions, including redistributing strain, accommodating brain expansion, supporting cranial bone growth, and protecting the brain. Thus, variation in the degree, timing, and pattern of suture fusion has functional implications. Using a comparative ontogenetic framework across Mammalia, we quantified degree and pattern of suture fusion through ontogeny for 22 mammalian species (N = 165). Suture closure was scored on a discrete scale for 31 cranial sutures and used to calculate closure scores for individual sutures and specimens. Ancestral state estimations found the degree of ancestral marsupial fusion to be more derived, differing from both the ancestral placental and ancestral therian. The average placental pattern followed the Krogman pattern of suture fusion (cranial vault, cranial base, circum-meatal, palatal, facial, and cranio-facial), whereas marsupials showed a distinct pattern. We propose a new pattern of suture fusion for marsupials: vault, cranio-facial, facial, circum-meatal, palate, cranial base. Delayed fusion of the marsupial cranial base is hypothesized here to support prolonged postnatal growth of the marsupial brain. Collectively, our study has identified a clear marsupial-placental dichotomy in the degree, timing, and pattern of suture fusion, with implications for understanding skull function and ontogeny.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"21 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141096691","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}

引用次数: 0

Integrative taxonomy of new neomphaloidean gastropods from deep-sea hot vents of the southwestern Pacific 西南太平洋深海热喷口新新头足类腹足动物的综合分类学

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-23 DOI: 10.1093/zoolinnean/zlae064

Chong Chen, Camille Poitrimol, Marjolaine Matabos

{"title":"Integrative taxonomy of new neomphaloidean gastropods from deep-sea hot vents of the southwestern Pacific","authors":"Chong Chen, Camille Poitrimol, Marjolaine Matabos","doi":"10.1093/zoolinnean/zlae064","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae064","url":null,"abstract":"Neomphaloidean gastropods are endemic to chemosynthesis-based ecosystems ranging from hot vents to organic falls, and their diversity and evolutionary history remain poorly understood. In the southwestern Pacific, deep-sea hydrothermal vents on back-arc basins and volcanic arcs are found in three geographically secluded regions: a western region around Manus Basin, an eastern region around North Fiji and Lau Basins, and the intermediate Woodlark Basin where active venting was confirmed only recently, on the 2019 R/V L’Atalante CHUBACARC expedition. Although various lineages of neomphaloidean snails have been detected, typically restricted to one of the three regions, some of these have remained without names. Here, we use integrative taxonomy to describe three of these species: the neomphalid Symmetromphalus mithril sp. nov. from Woodlark Basin and the peltospirids Symmetriapelta becki sp. nov. from the eastern region and Symmetriapelta radiata sp. nov. from Woodlark Basin. A combination of shell sculpture and radular characters allow the morphological separation of these new species from their described congeners. A molecular phylogeny reconstructed from 570 bp of the mitochondrial cytochrome c oxidase subunit I gene confirmed the placement of the three new species in their respective genera and the superfamily Neomphaloidea. The finding of these new gastropods, particularly the ones from the Woodlark Basin, provides insights and implications on the historical role of Woodlark as a dispersing centre, in addition to highlighting the uniqueness of the Woodlark faunal community.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"1 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141091795","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}

引用次数: 0

The inner ear and stapes of the basal mammaliaform Morganucodon revisited: new information on labyrinth morphology and promontorial vascularization 重访基底哺乳动物摩根古猿的内耳和镫骨：关于迷宫形态和前缘血管的新信息

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-21 DOI: 10.1093/zoolinnean/zlae062

Simone Hoffmann, Ramza Shahid Malik, Arjun Vidyasagar, Pamela Gill

{"title":"The inner ear and stapes of the basal mammaliaform Morganucodon revisited: new information on labyrinth morphology and promontorial vascularization","authors":"Simone Hoffmann, Ramza Shahid Malik, Arjun Vidyasagar, Pamela Gill","doi":"10.1093/zoolinnean/zlae062","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae062","url":null,"abstract":"Based on high-resolution computed tomography scanning, we provide new insights into the inner ear and stapedial morphology of Morganucodon from the Early Jurassic of St Brides. At the base of mammaliaforms, Morganucodon plays a pivotal role in understanding the sequence of character acquisition from basal cynodonts to mammals, including the detachment of the middle ear and the evolution of high-frequency hearing. Advancements in imaging technology enabled us to revise or newly describe crucial anatomy that was not accessible for the original description of Morganucodon. Based on 37 petrosals, we can confirm that the apex of the cochlear canal is expanded in Morganucodon, suggestive of a lagena macula. A gently raised crest along the abneural margin is reminiscent of (although much shallower than) the secondary lamina base of other Mesozoic mammaliaforms. The venous circum-promontorial plexus, which surrounded the inner ear in several basal mammaliaforms, was connected to the cochlear labyrinth in Morganucodon through numerous openings along the secondary lamina base. Two petrosals contain fragmentary stapes, which differ substantially from previously described isolated stapes attributed to Morganucodon in having peripherally placed crura and an oval and bullate footplate. Based on the revised stapedial morphology, we question the traditional view of an asymmetrical bicrural stapes as the plesiomorphic condition for Mammaliaformes.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"50 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141079418","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}

引用次数: 0

Bringing light into deep-sea biodiversity: a systematic revision and molecular phylogeny of the genus Scaphander Montfort, 1810 (Gastropoda: Cephalaspidea), with a focus on the Indo-Pacific 为深海生物多样性带来曙光：Scaphander Montfort, 1810 属（腹足纲：头足目）的系统修订和分子系统发育，重点关注印度洋-太平洋地区

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-17 DOI: 10.1093/zoolinnean/zlad201

Justine Siegwald, Manuel António E Malaquias

{"title":"Bringing light into deep-sea biodiversity: a systematic revision and molecular phylogeny of the genus Scaphander Montfort, 1810 (Gastropoda: Cephalaspidea), with a focus on the Indo-Pacific","authors":"Justine Siegwald, Manuel António E Malaquias","doi":"10.1093/zoolinnean/zlad201","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlad201","url":null,"abstract":"Scaphander is a genus of mostly deep-sea, soft-bottom gastropods distributed nearly worldwide. Its taxonomic history is complex, with 32 species currently accepted, most based on shells only. In this work, we revise the diversity and systematics of Scaphander, with a focus on the Indo-Pacific region, using a detailed morphological study and molecular phylogenetics. Conchological and anatomical characters, such as digestive and male reproductive systems were compared, and original descriptions and type material were investigated. Additionally, molecular species delimitation methods were used, such as Assemble Species by Automatic Partitioning (ASAP) based on the gene cytochrome c oxidase subunit I, and the multispecies coalescent method Species Tree And Classification Estimation, Yarely (STACEY) based on a dataset of five gene markers. Thirty-three Scaphander species were recognized worldwide, 10 still based only on shells. Five species are here described as new to science, namely Scaphander amygdalus sp. nov., Scaphander cornus sp. nov., Scaphander obnubilus sp. nov., Scaphander semicallus sp. nov. and Scaphander solomonensis sp. nov. The most diverse region is the Western Pacific (17 species), followed by the Atlantic (12 species) and the Indian Ocean (7 species).","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"127 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140954044","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}

引用次数: 0

Discovery of an endemism hotspot of freshwater mussels (Bivalvia: Unionidae) in Assam, with a description of two new genera 发现阿萨姆邦淡水贻贝（双壳类：Unionidae）的一个地方性热点，并描述两个新属

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-17 DOI: 10.1093/zoolinnean/zlae052

Ivan N Bolotov, Jyotish Sonowal, Devid Kardong, Rajeev Pasupuleti, Nalluri V Subba Rao, Suresh Kumar Unnikrishnan, Mikhail Y Gofarov, Alexander V Kondakov, Ekaterina S Konopleva, Artem A Lyubas, Ilya V Vikhrev

{"title":"Discovery of an endemism hotspot of freshwater mussels (Bivalvia: Unionidae) in Assam, with a description of two new genera","authors":"Ivan N Bolotov, Jyotish Sonowal, Devid Kardong, Rajeev Pasupuleti, Nalluri V Subba Rao, Suresh Kumar Unnikrishnan, Mikhail Y Gofarov, Alexander V Kondakov, Ekaterina S Konopleva, Artem A Lyubas, Ilya V Vikhrev","doi":"10.1093/zoolinnean/zlae052","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae052","url":null,"abstract":"The Indian subcontinent houses a unique fauna of freshwater mussels. Tectonic and biogeographic reconstructions indicate that this fauna represents a derivative of Mesozoic Gondwanan biota and that it arrived in Asia on the Indian Plate, using this tectonic block as a ‘biotic ferry’. Though a preliminary integrative revision of the Indian Unionidae was published recently, the level of endemism and taxonomic richness of regional assemblages are unsatisfactorily known. Here, we revise the taxonomy of freshwater mussels from the Brahmaputra River basin based on a large DNA-sequence and morphological dataset that was sampled in Assam, north-eastern India. We managed to collect and sequence topotypes for nearly all nominal species described from the region, except for Lamellidens friersoni and Parreysia smaragdites. Our phylogenetic and morphology-based research reveals that the regional Unionidae assemblage contains nine species, belonging to a single subfamily, the Parreysiinae. Seven species and three genera (Balwantia, Pseudoscabies Bolotov, Sonowal, Kardong, Pasupuleti and Subba Rao gen. nov., and Assamnaia Bolotov, Sonowal, Kardong, Pasupuleti and Subba Rao gen. nov.) appear to be endemic to the region, indicating that the Brahmaputra River may represent an endemism hotspot of global significance. Our findings highlight that this region should be considered a high-priority area for freshwater conservation management.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"66 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140954051","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}

引用次数: 0

On the last European giraffe, Palaeotragus inexspectatus (Mammalia: Giraffidae); new remains from the Early Pleistocene of Greece and a review of the species 关于欧洲最后一只长颈鹿--Palaeotragus inexspectatus（哺乳纲：长颈鹿科）；希腊早更新世的新遗骸以及该物种的综述

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-17 DOI: 10.1093/zoolinnean/zlae056

Kostantis Laskos, Dimitris S Kostopoulos

{"title":"On the last European giraffe, Palaeotragus inexspectatus (Mammalia: Giraffidae); new remains from the Early Pleistocene of Greece and a review of the species","authors":"Kostantis Laskos, Dimitris S Kostopoulos","doi":"10.1093/zoolinnean/zlae056","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae056","url":null,"abstract":"Eurasian Giraffidae went through a drastic biodiversity decline after the Miocene–Pliocene boundary; scanty palaeotragine populations are likely to have survived in Central Asia, providing the necessary stock for a Late Pliocene–Early Pleistocene expansion from Central Asia to Spain and from the Mediterranean to southern Russia. Here, we describe new giraffid findings from the Greek middle Villafranchian faunas of Dafnero-3 and Volax and from the late Villafranchian faunas of Tsiotra Vryssi and Krimni-3, and we revise previous material from Dafnero-1. Our results support the synonymy of almost all the Villafranchian Eurasian giraffids under a single species of Palaeotragus, i.e. Palaeotragus inexspectatus, and allow us to improve its diagnosis. The orientation of the ossicones and the relative shortening of the lower premolar row might indicate affinities to some Late Miocene–Pliocene Palaeotragus from China. Our study suggests that P. inexspectatus was equally abundant at MNQ17 and MNQ18 in the Eastern Mediterranean and that its extinction after MNQ19 was probably attributable to the combination of the climatic and environmental turnover at the Villafranchian–Epivillafranchian boundary, along with the competition with emerging ruminant groups, such as giant cervids. A preliminary analysis of its palaeoecology suggests a giraffid more involved in grazing than its Late Miocene relatives.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"11 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140954074","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}

引用次数: 0

The bird tear-drinking moths of the genus Hemiceratoides (Lepidoptera: Erebidae) 鸟类饮泪蛾属 Hemiceratoides（鳞翅目：Erebidae）

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-14 DOI: 10.1093/zoolinnean/zlae047

Alberto Zilli, Jérôme Barbut, Leejiah J Dorward, David C Lees

{"title":"The bird tear-drinking moths of the genus Hemiceratoides (Lepidoptera: Erebidae)","authors":"Alberto Zilli, Jérôme Barbut, Leejiah J Dorward, David C Lees","doi":"10.1093/zoolinnean/zlae047","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae047","url":null,"abstract":"New footage confirms Hemiceratoides moths to be bird tear-drinking. Bionomics of Hemiceratoides is updated, and its taxonomy revised, with descriptions of Hemiceratoides ornithopotis sp. nov. and H. avimolestum sp. nov., while Cynisca thysbe, type species of Siccyna (= Cynisca), is recombined as H. thysbe comb. nov. (thus Hemiceratoides = Siccyna synon. nov.), whereas another Siccyna, originally Cynisca reichi, is found to be conspecific with Devena atomifera (synon. nov.). We highlight the striking proboscis modifications in Hemiceratoides compared to non-calpine erebids that may perhaps be incidental eye frequenters. Hemiceratoides sittaca has remarkable, sexually dimorphic labial palps, which are fang-like in males, probably assisting in tear feeding. Hemiceratoides also features unusual valval processes, an asymmetric whip- or stick-like juxta, and sclerotizations surrounding the ostium bursae. A phylogenetic tree reconstructed with eight nuclear genes as well as COI for the subfamilies Hypocalinae + Calpinae confirms the prior finding that Hemiceratoides belongs to tribe Ophiderini, not to Calpini, and supports previously held relationships between calpine genera, except that (Miniodes + Phyllodes) do not form a sister group relationship with (Hemiceratoides + Eudocima). We thus discuss the controversy over the evolution of the unusual feeding habits in Hemiceratoides. Finally, Calyptra canadensis comb. rev. is updated due to a newly established synonymy Calyptra = Percalpe synon. nov.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"33 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925122","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}

引用次数: 0

A new sauropod species from north-western Brazil: biomechanics and the radiation of Titanosauria (Sauropoda: Somphospondyli) 巴西西北部的一个新蜥脚类物种：生物力学与泰坦龙科（蜥脚类：Somphospondyli）的辐射

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-13 DOI: 10.1093/zoolinnean/zlae054

Paulo V L G C Pereira, Kamila L N Bandeira, Luciano S Vidal, Theo B Ribeiro, Carlos R dos A Candeiro, Lilian P Bergqvist

{"title":"A new sauropod species from north-western Brazil: biomechanics and the radiation of Titanosauria (Sauropoda: Somphospondyli)","authors":"Paulo V L G C Pereira, Kamila L N Bandeira, Luciano S Vidal, Theo B Ribeiro, Carlos R dos A Candeiro, Lilian P Bergqvist","doi":"10.1093/zoolinnean/zlae054","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae054","url":null,"abstract":"Titanosaurs were the most diverse sauropod group during the Cretaceous period, with most of its diversity being found during the Late Cretaceous. In this work, Tiamat valdecii, gen. et sp. nov. is described, a new species of basal titanosaur prospected from the Açu Formation (Albian–Cenomanian), Potiguar Basin, Ceará state, north-east Brazil. The new taxon is composed by an associated sequence of anterior to middle caudal vertebrae, being diagnosed by four diagnostic features: a marked accessory tuberosity dorsoventrally developed, located on the prezygapophyses; deeply medioventral excavated articulation facets of prezygapophysis and post-zygapophyses articular facets; presence of developed hypantrum–hyposphene articulations; and short middle centra with a well-marked articular facet for the haemal arch. The phylogenetic analysis reveals that Tiamat valdecii was a basal member of Titanosauria. Tiamat is the first species of Early Cretaceous titanosaur known for the Açu Formation. Biomechanical analysis shows that the tuberosity and excavation of the zygapophyses of the middle caudal vertebrae of Tiamat provide greater stability against shear loads in the amphicoelous vertebrae presented; in addition, they allow greater range of lateral movements without affecting the integrity of the joints. These features may have been an evolutionary alternative for the stability of the middle of the caudal vertebral column. The discovery of T. valdecii in the Açu Formation not only increases the known dinosaur diversity for this unit, but also helps us elucidate part of the first titanosaur radiation.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"144 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140919556","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}

引用次数: 0

‘Birds’ of two feathers: Avicranium renestoi and the paraphyly of bird-headed reptiles (Diapsida: ‘Avicephala’) 有两根羽毛的'鸟'：Avicranium renestoi 和鸟头类爬行动物（双翅目：'Avicephala'）的类群划分

IF 2.8 2区生物学

Zoological Journal of the Linnean Society Pub Date : 2024-05-11 DOI: 10.1093/zoolinnean/zlae050

Valentin Buffa, Eberhard Frey, J-Sébastien Steyer, Michel Laurin

{"title":"‘Birds’ of two feathers: Avicranium renestoi and the paraphyly of bird-headed reptiles (Diapsida: ‘Avicephala’)","authors":"Valentin Buffa, Eberhard Frey, J-Sébastien Steyer, Michel Laurin","doi":"10.1093/zoolinnean/zlae050","DOIUrl":"https://doi.org/10.1093/zoolinnean/zlae050","url":null,"abstract":"The anatomy of Late Triassic drepanosauromorphs is re-examined, with a focus on the previously published surface models of the holotype of Avicranium renestoi from the Norian of North America. We comment on the cranial anatomy of this taxon and propose a new reconstruction of the skull and mandible. Contrary to previous interpretations, the entire rostrum and most of the palate are not preserved in this specimen. We also suggest that some proposed plesiomorphic characters may result from incomplete ossification due to immaturity. These new observations are compiled into a new morphological phylogenetic dataset designed to address the monophyly of ‘Avicephala’, the group comprising the Late Permian gliding reptiles Weigeltisauridae, and the Late Triassic chameleon-like Drepanosauromorpha. We recover Weigeltisauridae as stem-saurian diapsids and Drepanosauromorpha as sister-group to Trilophosauridae among archosauromorphs, thus implying the paraphyly of ‘Avicephala’. Drepanosauromorphs and trilophosaurids are recovered as sister-taxa for the first time, as supported by several cranial and postcranial synapomorphies. This new phylogenetic position of Drepanosauromorpha reduces the group’s ghost lineage that now does not necessarily cross the Permian–Triassic boundary. However, much remains unknown of the early history of trilophosaurids and drepanosauromorphs, and of the evolution of arboreality in Triassic archosauromorph reptiles.","PeriodicalId":49333,"journal":{"name":"Zoological Journal of the Linnean Society","volume":"153 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140910595","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}

引用次数: 0