Anatomical record (Hoboken, N.J. : 2007)最新文献

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Assessment of intraspecific skull variation in the Campanian baenid turtle Plesiobaena antiqua. 坎帕尼亚龟(Plesiobaena antiqua)种内颅骨变异评估。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-28 DOI: 10.1002/ar.70352
Scott Bellotti, Donald D Brinkman, Serjoscha W Evers, Walter G Joyce, Yann Rollot
{"title":"Assessment of intraspecific skull variation in the Campanian baenid turtle Plesiobaena antiqua.","authors":"Scott Bellotti, Donald D Brinkman, Serjoscha W Evers, Walter G Joyce, Yann Rollot","doi":"10.1002/ar.70352","DOIUrl":"https://doi.org/10.1002/ar.70352","url":null,"abstract":"<p><p>Baenids are freshwater paracryptodiran turtles with a fossil record ranging from the Early Cretaceous to the Eocene. The baenid Plesiobaena antiqua is the most common turtle in the Campanian (Late Cretaceous) Dinosaur Park Formation in Canada, but the apparent intraspecific variation remains poorly understood. We apply micro-computed tomography scanning technology (μCT scanning) and bone-by-bone segmentation to a sample of four crania and three mandibles representing different size classes. The available material allows us to rigorously document variation to the skull, of which most can be attributed to phenotypic or genetic variation, with exception of the jugal, which appears to insert itself into the margin of the orbit during ontogeny. It is unclear if the apparent variation to the presence of an epipterygoid is controlled by ontogeny or random variation. Notable variation found in the available mandibles can mostly be attributed to ontogenetic variation, consistent with a dietary shift towards durophagy. The detailed description of the skull anatomy of Plesiobaena antiqua combined with detailed documentation of variation is expected to provide new impulses for reconstructing baenid taxonomy and phylogeny.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149070847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Regional variability in skull sexual dimorphism: Olive baboons, blue monkeys, and vervets confirm the posterior region of the skull and the snout as opposite extremes of sex differences in Old World monkeys. 颅骨性别二型性的区域差异:橄榄狒狒、蓝猴和黑尾猴证实,颅骨后部和鼻子是旧大陆猴性别差异的相反极端。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-27 DOI: 10.1002/ar.70353
Andrea Cardini
{"title":"Regional variability in skull sexual dimorphism: Olive baboons, blue monkeys, and vervets confirm the posterior region of the skull and the snout as opposite extremes of sex differences in Old World monkeys.","authors":"Andrea Cardini","doi":"10.1002/ar.70353","DOIUrl":"https://doi.org/10.1002/ar.70353","url":null,"abstract":"<p><p>This study, alongside prior work on crab-eating macaques with O'Higgins, investigates regional variation in skull sexual dimorphism across different species of Old World monkeys. Findings reveal consistent patterns: the posterior skull regions (mandibular vertical ramus, chondrocranium and, possibly, the cranial vault) exhibit lower dimorphism, which may be related to developmental constraints such as the early formation of the cranial base. In contrast, the snout (including the horizontal ramus of the mandible and oro-facial regions of the cranium) shows the most pronounced dimorphism, aligned with functional and ecological demands, such as canine size differences and masticatory adaptations. Regional dimorphism patterns, if demonstrated, may aid taxonomic identification (focusing on less dimorphic regions) or sex discrimination (using snout measurements). However, these are, for now, hypotheses and potential contradictions in primate studies (e.g., great apes) indicate the need for standardized measurements and methods, as well as an expanded taxonomic sampling. Nonetheless, exploring regional anatomical variation in relation to sex, and potentially other factors such as age and taxon, is a promising avenue of research that can contribute to elucidating evolutionary patterns in morphological diversity of living and extinct species.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149070812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cristid obliqua morphology as a correlate of diet in lorisoids. 卷尾虫的斜脊形态与饮食的关系。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-25 DOI: 10.1002/ar.70354
Keegan R Selig
{"title":"Cristid obliqua morphology as a correlate of diet in lorisoids.","authors":"Keegan R Selig","doi":"10.1002/ar.70354","DOIUrl":"https://doi.org/10.1002/ar.70354","url":null,"abstract":"<p><p>Methods for elucidating dietary patterns from dental morphology have provided much insight into molar form, function, and diet in extinct taxa. However, many methods rely on the collection of homologous landmarks (like shearing crest lengths), or computationally intensive and nuanced metrics that capture shape (like dental topography). Here, a new metric is proposed that is both simple to collect and that performs as well as other methods of linking tooth form and function. The angle at the cristid obliqua (ACO), a lower molar crest involved in the shearing phase of the power stroke, is measured as the angle between two lines derived from the hypoflexid to the middle of the cristid obliqua and then to the occlusal basin. The ACO was examined in a sample of extant lorisoid primates (N = 49 specimens) that have previously been examined using methods of dental topographic analysis. Results suggest that the ACO does not covary strongly with molar size or relative cristid obliqua length but is more strongly correlated with measures of dental topography such as relief and curvature. The ACO separates dietary groups (insectivores from exudativores and frugivores) almost as well as molar curvature and better than relief or cristid obliqua length. In general, insectivores have more strongly developed cristids obliquae for shearing insect carapaces and are therefore characterized by lower ACO values. Together, results suggest that the ACO provides further insight into molar form and function and this tool may be useful for examining dietary patterns in extinct primates and mammals more generally.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149042737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spatiotemporal expression dynamics of CD73, CD90, and CD105 based on scRNA-seq and immunofluorescence analysis of dental pulp toward establishing a triple-positive population. 基于scRNA-seq和免疫荧光分析的牙髓CD73、CD90和CD105的时空表达动态,建立三阳性群体。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-24 DOI: 10.1002/ar.70327
Kateřina Holomková, Shuntaro Yamada, Eva Švandová, Eva Matalová, Jesica Hasmik Hovhannisyan, Taleen Krikorian, Lidiia Bagdasarian, Sona Ayvazyan, Dino Azadians, Hervé Lesot, Eva Janečková
{"title":"Spatiotemporal expression dynamics of CD73, CD90, and CD105 based on scRNA-seq and immunofluorescence analysis of dental pulp toward establishing a triple-positive population.","authors":"Kateřina Holomková, Shuntaro Yamada, Eva Švandová, Eva Matalová, Jesica Hasmik Hovhannisyan, Taleen Krikorian, Lidiia Bagdasarian, Sona Ayvazyan, Dino Azadians, Hervé Lesot, Eva Janečková","doi":"10.1002/ar.70327","DOIUrl":"https://doi.org/10.1002/ar.70327","url":null,"abstract":"<p><p>Dental pulp stem cells (DPSCs), a subset of mesenchymal stem/progenitor cells, exhibit remarkable self-renewal and multipotent differentiation capacity, making them promising candidates for regenerative applications. While their in vitro characteristics have been extensively studied, the in vivo dynamics and molecular regulation during development are much less known. This study examined the embryonic/prenatal (E16.5) and early postnatal (P3.5 and P7.5) stages of mouse molar development to trace the temporospatial expression and overlap of five key molecules associated with DPSC: a trio of positive markers (CD73/Nt5e, CD90/Thy1, and CD105/Eng) and two negative markers (CD34/Cd34 and CD45/Ptprc). Reanalysis of single-cell RNA sequencing data revealed a triple-positive and double-negative population overlapping in the dental mesenchyme by P7.5. The results were confirmed by multiple immunofluorescence-based in situ labeling. These findings contribute to the understanding of the spatiotemporal in vivo expression landscape and dynamics of DPSC markers, thus bridging the gap between in vitro characterization and the complex developmental reality of the dental pulp.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149042769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anatomy and variation in the paraphyletic Mosasaurus lemonnieri assemblage from the Craie phosphatée de ciply, Belgium. 比利时磷化海鲈群副食型柠檬沧龙群的解剖与变异。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-22 DOI: 10.1002/ar.70338
Henry S Sharpe, Hallie P Street-Sampson, Takuya Konishi, Michael W Caldwell
{"title":"Anatomy and variation in the paraphyletic Mosasaurus lemonnieri assemblage from the Craie phosphatée de ciply, Belgium.","authors":"Henry S Sharpe, Hallie P Street-Sampson, Takuya Konishi, Michael W Caldwell","doi":"10.1002/ar.70338","DOIUrl":"https://doi.org/10.1002/ar.70338","url":null,"abstract":"<p><p>Nineteenth century excavations of the Ciply-Malogne Phosphatic Chalk Formation in Hainaut, Belgium, yielded over 50 partial mosasaur skeletons, the majority of which were referred to the species Mosasaurus lemonnieri Dollo, 1889. In the years since, this taxon has experienced a complicated taxonomic history, and its exceptional hypodigm has gone understudied. Here, the osteology and variation of these specimens are described and figured in detail, with the goal of elucidating the taxonomy of these mosasaurs and improving anatomical understandings of mosasaurs in general. These specimens mostly show a unique and stable group of apomorphies, supporting their position as a distinct taxon in the genus Mosasaurus. Variation abounds, particularly in entheseal development, allometric robusticity, and cranial ossification patterns. Most of these specimens are juveniles or subadults, which has contributed to problematic past diagnoses for this species. We conclude that M. lemonnieri is a valid taxon, but that one specimen belongs to a distinct taxon of mosasaurine, here named Thoraxion tahlequahae gen. et sp. nov. The high degree of intraspecific variation in M. lemonnieri argues against the usage of several past taxonomic and phylogenetic characters. Several well-preserved specimens allow for 3D reconstructions of the palate, rostral cranial cartilages, and ribcages of derived mosasaurs, and new putative pythonomorph synapomorphies of the cranial soft tissues.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative morphology of the skeletal labyrinth in extant squalomorph sharks. 现存角鲨骨骼迷宫的比较形态学。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-20 DOI: 10.1002/ar.70350
Kaci Dodd, Isamar Lopez-Argueta, Malcolm Edwards-Silva, Lucero Kim, Angel Palomera, Allison Bronson
{"title":"Comparative morphology of the skeletal labyrinth in extant squalomorph sharks.","authors":"Kaci Dodd, Isamar Lopez-Argueta, Malcolm Edwards-Silva, Lucero Kim, Angel Palomera, Allison Bronson","doi":"10.1002/ar.70350","DOIUrl":"https://doi.org/10.1002/ar.70350","url":null,"abstract":"<p><p>The inner ear of vertebrates serves dual roles, detecting sound as well as maintaining equilibrium. The increased accessibility of Computed Tomography (CT) provides an opportunity to assess the morphology of the skeletal labyrinth, which houses the membranous labyrinth of the ear, in one of the two primary clades of elasmobranchs: Squalomorphi. This study describes the morphology of the skeletal labyrinth of 10 species of squalomorphs: Chlamydoselachus anguineus, Heptranchias perlo, Hexanchus griseus, Notorynchus cepedianus, Squatina californica, Centrophorus squamosus, Squaliolus laticaudus, Oxynotus centrina, Isistius brasiliensis, and Etmopterus bullisi. Hexanchiformes are found to have more robust skeletal labyrinth spaces housing the semicircular canals and ampullae, while taxa from Order Squaliformes have more slender labyrinths. Given the variety in diet and habitat across this sample of taxa, we advocate for broader taxonomic coverage and finer assessment of ecological categories in the future, as well as quantitative assessments of ear geometry and its relationship with phylogenetic history, locomotion, and habitat.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149012949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New materials of Desmatolagus gobiensis from Ulantatal, Nei Mongol provide morphological evidence for the origin of Ochotonidae (Lagomorpha, Mammalia). 内蒙古乌兰塔塔尔地区gobiensis Desmatolagus gobiensis的新材料提供了哺乳动物绵猴科起源的形态学证据。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-18 DOI: 10.1002/ar.70351
Zhaoqun Zhang, Bian Wang
{"title":"New materials of Desmatolagus gobiensis from Ulantatal, Nei Mongol provide morphological evidence for the origin of Ochotonidae (Lagomorpha, Mammalia).","authors":"Zhaoqun Zhang, Bian Wang","doi":"10.1002/ar.70351","DOIUrl":"https://doi.org/10.1002/ar.70351","url":null,"abstract":"<p><p>We report the first skull of Desmatolagus gobiensis, along with well-preserved maxillae and mandibles, discovered from Early Oligocene strata in Ulantatal, Nei Mongol, China, with detailed morphological comparison with extant Ochotona and other fossil taxa with skulls reported. Our updated phylogenetic analysis supports the monophyly of the family Ochotonidae, with Desmatolagus placed at the most basal position of the family, confirming Desmatolagus as the earliest member of Ochotonidae, as also evidenced by the present fossil record. Exploration of the morphological transitions in Ochotonidae suggests that major characters of extant Ochotonidae occurred at different evolutionary stages. Additionally, new juvenile specimens of Desmatolagus gobiensis from Ulantatal suggest unusual replacement of milk teeth, from the last to the first, as in extant Ochotona and Lepus.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149003335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Piram Island fossil mammals revisited: Implications for age and palaeoecology. 皮拉姆岛哺乳动物化石重访:对年龄和古生态学的影响。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-17 DOI: 10.1002/ar.70346
Rajeev Patnaik, Suresh Srivastava, K Milankumar Sharma, Asgar Hossain, Advait M Jukar, Deepak Choudhary, Christopher C Gilbert, Ashok Sahni
{"title":"The Piram Island fossil mammals revisited: Implications for age and palaeoecology.","authors":"Rajeev Patnaik, Suresh Srivastava, K Milankumar Sharma, Asgar Hossain, Advait M Jukar, Deepak Choudhary, Christopher C Gilbert, Ashok Sahni","doi":"10.1002/ar.70346","DOIUrl":"https://doi.org/10.1002/ar.70346","url":null,"abstract":"<p><p>Piram (Perim) Island of Kathiawar (Gujarat) is well known for its preserved wealth of fossil vertebrates since the early 18th century. Broadly, these vertebrates have been considered to be equivalent to the Dhok Pathan stage of the Middle Siwaliks (~9.8-3.5 Ma). Based on earlier finds and recent field work, we describe additional fossil mammals, including the first report of a rodent from these sediments. Also, we discuss the biostratigraphy and palaeoecology of Piram in the light of the latest available Siwalik mammalian biochronology and stable carbon and oxygen isotope analyses. We can now place these highly fossiliferous sediments at ~8.7 Ma based on the first occurrence (FO) of the hipparionine equid Sivalhippus perimensis and the last occurrence (LO) of the rodent Democricetodon fejfari. Our carbon isotopic data reveal that most of the mammals (bovids, proboscideans, rhinoceratids and giraffids) were dominantly C3 browsers and lived in tropical forests and wet to dry woodlands, whereas Sivalhippus perimensis had a wider range of diet and habitat, ranging from C3 browsing in the tropical forest and wet-dry woodland to mixed C3 and C4 feeding in water stressed wooded grassland. Further, the intra-tooth oxygen isotope values recovered from two high crowned Sivalhippus perimensis teeth reveal evidence of the existence of monsoon-like seasonality in the Late Miocene around the Kathiawar region of Gujarat. Overall, the carbon isotope data indicate co-existence of strict browsers, mixed feeders, and limited grazers in a mosaic of closed canopy forest, woodland and some grassland patches, while oxygen isotope data suggest environmental heterogeneity.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148984613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Redescription of the cranial morphology of Amphisbaena braestrupi and Amphisbaena laurenti (Squamata: Amphisbaenidae) from the Pleistocene of Brazil using x-ray computed tomography. 用x射线计算机断层扫描重新描述巴西更新世的布氏水仙和laurenti水仙的颅骨形态(鳞目:水仙科)。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-16 DOI: 10.1002/ar.70349
Carolina L Paiva, Henrique C Costa, Christy A Hipsley
{"title":"Redescription of the cranial morphology of Amphisbaena braestrupi and Amphisbaena laurenti (Squamata: Amphisbaenidae) from the Pleistocene of Brazil using x-ray computed tomography.","authors":"Carolina L Paiva, Henrique C Costa, Christy A Hipsley","doi":"10.1002/ar.70349","DOIUrl":"https://doi.org/10.1002/ar.70349","url":null,"abstract":"<p><p>Amphisbaenians (Squamata: Amphisbaenidae) are fossorial reptiles with highly specialized cranial morphology, yet their fossil record is frequently limited by fragmentary preservation. This study provides a detailed osteological redescription of the skulls of Amphisbaena braestrupi and Amphisbaena laurenti from the Pleistocene of Lagoa Santa (Brazil) using high-resolution x-ray computed tomography. Beyond surface morphology, 3D reconstructions allowed the first detailed visualization of previously inaccessible internal anatomical features, such as the complex architecture of the braincase and the parabasal and optic canals. The analysis revealed hourglass-shaped skulls with pronounced sagittal crests and an advanced degree of coossification in the occipital complex. Digital dissection enabled the description of the pyramidal morphology of the otic capsules and the arrangement of the semicircular canals, alongside a more comprehensive redescription of the fossil material. Comparisons with the extant species Amphisbaena alba show that the fossils reach the upper limit of cranial size variation and exhibit greater occipital robustness. These findings fill critical anatomical gaps, providing new internal characters for taxonomic, phylogenetic, and evolutionary studies of South American amphisbaenians.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148979207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
2D structural annotation and 3D reconstruction of the whole brain of Alligator sinensis. 扬子鳄全脑二维结构标注及三维重建。
IF 2.1
Anatomical record (Hoboken, N.J. : 2007) Pub Date : 2026-09-16 DOI: 10.1002/ar.70348
Mengqin Liu, Shi Wang, Jie Wei, Ke Sun, Yongkang Zhou, Jun He, Haitao Nie, Linming Lu, En Li, Xiaobing Wu
{"title":"2D structural annotation and 3D reconstruction of the whole brain of Alligator sinensis.","authors":"Mengqin Liu, Shi Wang, Jie Wei, Ke Sun, Yongkang Zhou, Jun He, Haitao Nie, Linming Lu, En Li, Xiaobing Wu","doi":"10.1002/ar.70348","DOIUrl":"https://doi.org/10.1002/ar.70348","url":null,"abstract":"<p><p>The Chinese alligator (Alligator sinensis) is a small crocodilian endemic to China; current neuroanatomical knowledge of its whole brain remains limited. In the present study, we combined the Micro-Optical Sectioning Tomography system with Imaris, CorelDRAW, and MATLAB software to generate a histological atlas of the entire Chinese alligator brain and reconstruct its 3D digital brain model. Results showed that the whole brain of the Chinese alligator is anatomically partitioned into eight major compartments: olfactory bulb (OB), olfactory tract (OTr), telencephalon (Tel), diencephalon (Dien), mesencephalon (Mes), cerebellum (Cer), pituitary gland (PG), and medulla oblongata (MO). Most distinguishable cytoarchitectonic structures reside within the Tel, Dien, and Mes. The main OB exhibits a finely laminated cytoarchitecture, whereas an accessory olfactory bulb (AOB) is absent. Collectively, the Tel and Dien occupy approximately one-third of the total brain volume. The mesencephalic tectum displays distinct laminar organization, with the corpora quadrigemina (CQ) differentiated into superior and inferior colliculi. A total of 116 discrete brain structures were annotated in this atlas. We unambiguously identified a pineal body (PB) in the Chinese alligator, substantially expanding the fundamental neurohistological dataset of crocodilian brains. This work establishes a foundational morphological template for reptilian nervous system research and provides critical comparative anatomical references for evolutionary neurobiology across all vertebrate lineages.</p>","PeriodicalId":520555,"journal":{"name":"Anatomical record (Hoboken, N.J. : 2007)","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148984616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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