Pub Date : 2023-01-02DOI: 10.1080/02693445.2023.2234156
Joseph A. Bonsor, J. Lockwood, J. Leite, Amy Scott-Murray, S. Maidment
ABSTRACT Iguanodontian dinosaurs are known from Middle Jurassic to Late Cretaceous deposits worldwide and are historically important because they include the first fossils to be identified as giant extinct reptiles that later became known as dinosaurs. Due to historical taxonomic practices and the fragmentary nature of many specimens, discoveries from the 19th century were referred to Iguanodon with little appraisal, resulting in the genus becoming something of a ‘wastebasket taxon’. Reinterpretations of holotype specimens are an important step in attempting to understand the evolutionary history of iguanodontian dinosaurs. Here, we redescribe the holotype of Mantellisaurus atherfieldensis, one of the most complete British dinosaur specimens, from the Barremian/Aptian of the Isle of Wight, UK, and assess its phylogenetic position. We find that Mantellisaurus atherfieldensis is a valid taxon distinct from the genus Iguanodon based on three autapomorphies of the premaxilla, maxilla, and scapula, and resolves as an early diverging hadrosauroid styracosternan, representing an important step in the evolutionary history of the ornithopods.
{"title":"THE OSTEOLOGY OF THE HOLOTYPE OF THE BRITISH IGUANODONTIAN DINOSAUR MANTELLISAURUS ATHERFIELDENSIS","authors":"Joseph A. Bonsor, J. Lockwood, J. Leite, Amy Scott-Murray, S. Maidment","doi":"10.1080/02693445.2023.2234156","DOIUrl":"https://doi.org/10.1080/02693445.2023.2234156","url":null,"abstract":"ABSTRACT Iguanodontian dinosaurs are known from Middle Jurassic to Late Cretaceous deposits worldwide and are historically important because they include the first fossils to be identified as giant extinct reptiles that later became known as dinosaurs. Due to historical taxonomic practices and the fragmentary nature of many specimens, discoveries from the 19th century were referred to Iguanodon with little appraisal, resulting in the genus becoming something of a ‘wastebasket taxon’. Reinterpretations of holotype specimens are an important step in attempting to understand the evolutionary history of iguanodontian dinosaurs. Here, we redescribe the holotype of Mantellisaurus atherfieldensis, one of the most complete British dinosaur specimens, from the Barremian/Aptian of the Isle of Wight, UK, and assess its phylogenetic position. We find that Mantellisaurus atherfieldensis is a valid taxon distinct from the genus Iguanodon based on three autapomorphies of the premaxilla, maxilla, and scapula, and resolves as an early diverging hadrosauroid styracosternan, representing an important step in the evolutionary history of the ornithopods.","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126673393","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}
Pub Date : 2022-09-02DOI: 10.1080/02693445.2022.2162669
S. Maidment, Kimberley E. J. Chapelle, Joseph A. Bonsor, David J. Button, P. Barrett
ABSTRACT The iguanodontian dinosaurs have a fossil record that extends from the Middle Jurassic to the end of the Cretaceous, by which time they had diversified to become the dominant herbivores of Laurasian ecosystems. They are historically important because fossils of British iguanodontians were among the first to be recognised as the gigantic reptiles that formed the basis for naming Dinosauria. However, the early stages of their evolution remain obscure because of a sparse fossil record, and taxonomic and systematic controversies among non-hadrosaurid iguanodontians abound. In order to shed light on the early stages of iguanodontian evolution, new discoveries and re-interpretations of historic specimens are crucial. Here, we redescribe the Late Jurassic early-branching iguanodontian Cumnoria prestwichii from the Kimmeridge Clay Formation of Oxfordshire, UK, and assess its phylogenetic position. We find that Cumnoria is distinct from the North American taxon Camptosaurus, with which it was previously synonymized, and is valid, possessing two autapomorphies of the pectoral girdle. We recover its phylogenetic position as a non-ankylopollexian iguanodontian. Cumnoria represents one of just four valid ornithopod taxa from the Jurassic of Europe.
{"title":"OSTEOLOGY AND RELATIONSHIPS OF CUMNORIA PRESTWICHII (ORNITHISCHIA: ORNITHOPODA) FROM THE LATE JURASSIC OF OXFORDSHIRE, UK","authors":"S. Maidment, Kimberley E. J. Chapelle, Joseph A. Bonsor, David J. Button, P. Barrett","doi":"10.1080/02693445.2022.2162669","DOIUrl":"https://doi.org/10.1080/02693445.2022.2162669","url":null,"abstract":"ABSTRACT The iguanodontian dinosaurs have a fossil record that extends from the Middle Jurassic to the end of the Cretaceous, by which time they had diversified to become the dominant herbivores of Laurasian ecosystems. They are historically important because fossils of British iguanodontians were among the first to be recognised as the gigantic reptiles that formed the basis for naming Dinosauria. However, the early stages of their evolution remain obscure because of a sparse fossil record, and taxonomic and systematic controversies among non-hadrosaurid iguanodontians abound. In order to shed light on the early stages of iguanodontian evolution, new discoveries and re-interpretations of historic specimens are crucial. Here, we redescribe the Late Jurassic early-branching iguanodontian Cumnoria prestwichii from the Kimmeridge Clay Formation of Oxfordshire, UK, and assess its phylogenetic position. We find that Cumnoria is distinct from the North American taxon Camptosaurus, with which it was previously synonymized, and is valid, possessing two autapomorphies of the pectoral girdle. We recover its phylogenetic position as a non-ankylopollexian iguanodontian. Cumnoria represents one of just four valid ornithopod taxa from the Jurassic of Europe.","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125417257","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}
Pub Date : 2022-05-04DOI: 10.1080/02693445.2022.2143626
D. Siveter
ABSTRACT In Part 2 those ostracods belonging to the Treposellidae, Beyrichiidae and Beyrichiacea Family Uncertain are described, and are referred to a total of 17 genera and 35 named species. The Treposellidae comprises six genera (one new) and seven species (four new). The Beyrichiidae comprises Beyrichiinae (five genera, one new; one new subgenus; and 19 species, five new) and Kloedeniinae (four genera; and six species). Beyrichiacea Family Uncertain comprises two genera (one new) and three species (one new). A total of seven other forms are referred to the Treposellidae, Beyrichiidae and Beyrichiacea Family Uncertain under open nomenclature or are simply recorded. The biostratigraphy of British Silurian Beyrichiacea and their palaeoecological and palaeobiogeographical context is also documented.
{"title":"BRITISH SILURIAN BEYRICHIACEA (OSTRACODA). PART 2","authors":"D. Siveter","doi":"10.1080/02693445.2022.2143626","DOIUrl":"https://doi.org/10.1080/02693445.2022.2143626","url":null,"abstract":"ABSTRACT In Part 2 those ostracods belonging to the Treposellidae, Beyrichiidae and Beyrichiacea Family Uncertain are described, and are referred to a total of 17 genera and 35 named species. The Treposellidae comprises six genera (one new) and seven species (four new). The Beyrichiidae comprises Beyrichiinae (five genera, one new; one new subgenus; and 19 species, five new) and Kloedeniinae (four genera; and six species). Beyrichiacea Family Uncertain comprises two genera (one new) and three species (one new). A total of seven other forms are referred to the Treposellidae, Beyrichiidae and Beyrichiacea Family Uncertain under open nomenclature or are simply recorded. The biostratigraphy of British Silurian Beyrichiacea and their palaeoecological and palaeobiogeographical context is also documented.","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128753495","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}
Pub Date : 2022-01-02DOI: 10.1080/02693445.2022.2133204
P. Hodges
ABSTRACT Part 4 concludes the descriptions of early Jurassic bivalves from the Hettangian and Lower Sinemurian stages of south-west Britain. Fifty-four species are assigned to the subclass Pteriomorphia, including the genera Grammatodon (Grammatodon), Grammatodon (Cosmetodon), Plagiostoma, Antiquilima, Pseudolimea, Ctenostreon, Otapiria, Oxytoma (Oxytoma), Palmoxytoma, Meleagrinella (Praemeleagrinella), Bositra, Terquemia, Placunopsis, Entolium (Entolium), Chlamys (Chlamys), Chlamys (Copeipecten) subgen. nov., Pseudopecten (Pseudopecten), Camptonectes (Gandalfus) subgen. nov., Eopecten, Harpax, Atreta, Liostrea, Gryphaea (Gryphaea), including G. (G.) lavernockensis sp. nov., Gryphaea (Bilobissa), Nanogyra, Parainoceramya, Semuridia, Anningella, Pteria, Cuneigervillia, Gervillella, Gervillia (Gervillia), Gervillia (Cultriopsis) and Pinna (Pinna). Semuridia and Anningella are placed in the new proposed family Anningellidae.
{"title":"THE EARLY JURASSIC BIVALVIA FROM THE HETTANGIAN AND LOWER SINEMURIAN OF SOUTH-WEST BRITAIN. PART 4","authors":"P. Hodges","doi":"10.1080/02693445.2022.2133204","DOIUrl":"https://doi.org/10.1080/02693445.2022.2133204","url":null,"abstract":"ABSTRACT Part 4 concludes the descriptions of early Jurassic bivalves from the Hettangian and Lower Sinemurian stages of south-west Britain. Fifty-four species are assigned to the subclass Pteriomorphia, including the genera Grammatodon (Grammatodon), Grammatodon (Cosmetodon), Plagiostoma, Antiquilima, Pseudolimea, Ctenostreon, Otapiria, Oxytoma (Oxytoma), Palmoxytoma, Meleagrinella (Praemeleagrinella), Bositra, Terquemia, Placunopsis, Entolium (Entolium), Chlamys (Chlamys), Chlamys (Copeipecten) subgen. nov., Pseudopecten (Pseudopecten), Camptonectes (Gandalfus) subgen. nov., Eopecten, Harpax, Atreta, Liostrea, Gryphaea (Gryphaea), including G. (G.) lavernockensis sp. nov., Gryphaea (Bilobissa), Nanogyra, Parainoceramya, Semuridia, Anningella, Pteria, Cuneigervillia, Gervillella, Gervillia (Gervillia), Gervillia (Cultriopsis) and Pinna (Pinna). Semuridia and Anningella are placed in the new proposed family Anningellidae.","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128416099","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}
Pub Date : 2021-09-02DOI: 10.1080/02693445.2021.2037868
Sarah Sangster
ABSTRACT Dimorphodon macronyx (Buckland, 1829) is one of the earliest known Jurassic pterosaurs and the first English pterosaur to have been formally described; the original specimens from the London Natural History Museum have not been fully reviewed since Richard Owen’s monograph of 1870. This monograph provides a detailed, comparative osteological description and emended diagnosis of D. macronyx, based primarily on the four key London and British Geological Survey specimens, and supplemented by the other known skeletal material. Previously undescribed palatal bones uncovered in one of the Natural History Museum specimens (NHMUK 41212) in 2002 are also described and a tentative reconstruction of the palate presented. A short review of previous phylogenetic studies on the taxonomic status of D. macronyx is provided.
{"title":"THE OSTEOLOGY OF DIMORPHODON MACRONYX, A NON-PTERODACTYLOID PTEROSAUR FROM THE LOWER JURASSIC OF DORSET, ENGLAND","authors":"Sarah Sangster","doi":"10.1080/02693445.2021.2037868","DOIUrl":"https://doi.org/10.1080/02693445.2021.2037868","url":null,"abstract":"ABSTRACT Dimorphodon macronyx (Buckland, 1829) is one of the earliest known Jurassic pterosaurs and the first English pterosaur to have been formally described; the original specimens from the London Natural History Museum have not been fully reviewed since Richard Owen’s monograph of 1870. This monograph provides a detailed, comparative osteological description and emended diagnosis of D. macronyx, based primarily on the four key London and British Geological Survey specimens, and supplemented by the other known skeletal material. Previously undescribed palatal bones uncovered in one of the Natural History Museum specimens (NHMUK 41212) in 2002 are also described and a tentative reconstruction of the palate presented. A short review of previous phylogenetic studies on the taxonomic status of D. macronyx is provided.","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129523369","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}
Pub Date : 2021-05-04DOI: 10.1080/02693445.2021.2027157
S. Kershaw, A. Christine, Da Silva, C. Sendino
ABSTRACT Recommended reference to this publication: Kershaw, S., Da Silva, A.-C. & Sendino, C. 2021. British Silurian stromatoporoids. Fauna, palaeobiology, and palaeogeographical significance. Monograph of the Palaeontographical Society, London: 1-92; pls 1-22. (Publ. No. 660, part of Vol. 175 for 2021.) British Silurian stromatoporoids occur in carbonate rocks, mostly in the Wenlock Series, together with a small number in the Llandovery Series and very few in the Ludlow Series. Using field and museum material (408 samples) and literature, this study identifies 15 stromatoporoid genera, doubling the previously known generic diversity, so the British Isles holds the third highest genera-diversity Wenlock assemblage after Gotland/Estonia (23 genera) and the Siberian Platform (20 genera). Remarkably, nearly all samples come from the small (100 × 100 km) Much Wenlock Limestone Formation (MWLF) (Homerian Stage, uppermost Wenlock Series) in the Midland Platform of central England (Avalonia), surrounded, underlain, and overlain by siliciclastics. On the Midland Platform one sample is Llandovery age; 11 samples are Ludlow age (Aymestry Limestone). Other samples from the Isle of Man (Wenlock age, six samples) and south-west Scotland (Llandovery age, three samples) are in transported material, with associated corals and they indicate unpreserved carbonate platforms in northern Britain. A few Llandovery Series stromatoporoids are also reported from Ireland, both north and south of the Iapetus Suture; published reports of Wenlock stromatoporoids from Ireland are shown to be misidentified trace fossils. In the MWLF stromatoporoids (together with the more abundant rugose corals, tabulates, heliolitids, and some microbial carbonates) occur in small patch reefs and in bedded bioclastic grainstones, packstones, and nodular wackestones; stromatoporoids are more common in and near patch reefs. The MWLF stromatoporoid fauna has 15 confirmed low-level taxa: Labechia conferta (Lc), Lophiostroma schmidti (Ls), Ecclimadictyon macrotuberculatum (Em) and E. astrolaxum (Ea), Petridiostroma simplex (Ps) and P. linnarssoni (Pl), Actinostromella vaiverensis (Av), Araneosustroma fistulosum (Af), Densastroma pexisum (Dp), Plectostroma intertextum (Pi), Simplexodictyon yavorskyi (Sy), Eostromatopora impexa (Ei), ‘Stromatopora’ venukovi (‘S’v), Syringostromella borealis (Sb) and Parallelostroma typicum (Pt). No new taxa were found. The five most abundant taxa (Lc, Av, Dp, Px, and Sb) total 230 specimens, 64.2% of the MWLF assemblage, consistent with taxa proportions in other Palaeozoic stromatoporoid assemblages. The stromatoporoids have limited growth forms: Lc grew laminar frames, mostly in patch reefs; the other taxa range from laminar to high domical, maximum sizes around 40 cm basal diameter. They almost completely lack the complexities and diversities of form of their contemporaries in nearby large carbonate platforms of Baltica (Gotland/Estonia) and Laurentia (eastern USA
推荐参考:Kershaw, S.， Da Silva, A.-C。& Sendino, C. 2021。英属志留纪层孔虫。动物群、古生物学和古地理意义。古生物学学会专论，伦敦:1-92;请22页。(出版。第660号，2021年第175卷的一部分。)英国志留系叠层孔类主要赋存于碳酸盐岩中，主要分布在温洛克系，少量分布在兰多弗里系，少量分布在勒德洛系。利用野外和博物馆资料(408个样本)和文献资料，本研究确定了15个层孔虫属，是以前已知的属多样性的两倍，因此不列颠群岛拥有第三高的属多样性Wenlock组合，仅次于哥特兰/爱沙尼亚(23属)和西伯利亚平台(20属)。值得注意的是，几乎所有的样品都来自英格兰中部(阿瓦洛尼亚)米德兰台地的小(100 × 100公里)多温洛克灰岩组(MWLF)(荷马纪阶段，最上层的温洛克系列)，被硅塑料包围、下垫和覆盖。在米德兰月台上，一个样本是兰多夫时代;11个样品为勒德洛年龄(Aymestry Limestone)。来自马恩岛(Wenlock时代，6个样本)和苏格兰西南部(Llandovery时代，3个样本)的其他样本都是运输材料，有相关的珊瑚，它们表明英国北部未保存的碳酸盐台地。在爱尔兰Iapetus缝合线的北部和南部也发现了一些llanddovery系列的叠层孔类;来自爱尔兰的温洛克层孔虫的已发表报告被证明是被错误识别的痕迹化石。在MWLF中，叠层孔类(与更丰富的绉珊瑚、表珊瑚、日石和一些微生物碳酸盐一起)出现在小块珊瑚礁和层状生物碎屑颗粒岩、堆状岩和结节状微晶岩中;叠层孔虫在斑块珊瑚礁内和附近更常见。MWLF叠孔类动物群有15个已确认的低水平类群:斑纹斑纹螨(Lc)、施米氏斑纹螨(Ls)、巨瘤斑纹螨(Em)和星状斑纹螨(Ea)、单根斑纹螨(Ps)和林纳氏斑纹螨(Pl)、vaiver放线菌(Av)、Araneosustroma fistulosum (Af)、petrsastroma pexisum (Dp)、plectostromma intertextum (Pi)、simplexdictyon yavorskyi (Sy)、Eostromatopora impexa (Ei)、Stromatopora venukovi (S’v)、Syringostromella borealis (Sb)和parallelostromum typicum (Pt)。未发现新的分类群。Lc、Av、Dp、Px和Sb 5个最丰富的分类群共230个，占MWLF组合的64.2%，与其他古生代叠孔虫组合的分类群比例一致。叠层孔虫的生长形式有限:Lc生长层流框架，主要在斑块礁;其他分类群的范围从层状到高圆顶状，最大尺寸约40厘米的基直径。与波罗的海(哥特兰/爱沙尼亚)和劳伦西亚(美国东部和加拿大)附近的大型碳酸盐岩台地相比，它们几乎完全缺乏复杂性和形式的多样性;只有两个样本含有共生珊瑚。总的来说，英国志留纪叠层孔虫可能被视为一个相对有限的浅海组合，在海平面上升和低硅屑输入的短时间和空间窗口中利用了合适的条件。在温洛克世末的阿瓦洛尼亚微大陆中，MWLF是最大的组合。在古地理上，Avalonia叠孔虫的组合位于Laurentia, Baltica和其他志留纪大陆之间的重要位置，可能有助于叠孔虫的分布途径，这些叠孔虫可能具有浮游形式的迁移。叠层孔虫可能没有受到中志留纪灭绝事件的影响，但数据不足以确定。Les stromatoporoïdes de Silurien de Grande-Bretagne。棕榈树的生物学和意义
{"title":"BRITISH SILURIAN STROMATOPOROIDS. FAUNAS, PALAEOBIOLOGY, AND PALAEOGEOGRAPHICAL SIGNIFICANCE","authors":"S. Kershaw, A. Christine, Da Silva, C. Sendino","doi":"10.1080/02693445.2021.2027157","DOIUrl":"https://doi.org/10.1080/02693445.2021.2027157","url":null,"abstract":"ABSTRACT Recommended reference to this publication: Kershaw, S., Da Silva, A.-C. & Sendino, C. 2021. British Silurian stromatoporoids. Fauna, palaeobiology, and palaeogeographical significance. Monograph of the Palaeontographical Society, London: 1-92; pls 1-22. (Publ. No. 660, part of Vol. 175 for 2021.) British Silurian stromatoporoids occur in carbonate rocks, mostly in the Wenlock Series, together with a small number in the Llandovery Series and very few in the Ludlow Series. Using field and museum material (408 samples) and literature, this study identifies 15 stromatoporoid genera, doubling the previously known generic diversity, so the British Isles holds the third highest genera-diversity Wenlock assemblage after Gotland/Estonia (23 genera) and the Siberian Platform (20 genera). Remarkably, nearly all samples come from the small (100 × 100 km) Much Wenlock Limestone Formation (MWLF) (Homerian Stage, uppermost Wenlock Series) in the Midland Platform of central England (Avalonia), surrounded, underlain, and overlain by siliciclastics. On the Midland Platform one sample is Llandovery age; 11 samples are Ludlow age (Aymestry Limestone). Other samples from the Isle of Man (Wenlock age, six samples) and south-west Scotland (Llandovery age, three samples) are in transported material, with associated corals and they indicate unpreserved carbonate platforms in northern Britain. A few Llandovery Series stromatoporoids are also reported from Ireland, both north and south of the Iapetus Suture; published reports of Wenlock stromatoporoids from Ireland are shown to be misidentified trace fossils. In the MWLF stromatoporoids (together with the more abundant rugose corals, tabulates, heliolitids, and some microbial carbonates) occur in small patch reefs and in bedded bioclastic grainstones, packstones, and nodular wackestones; stromatoporoids are more common in and near patch reefs. The MWLF stromatoporoid fauna has 15 confirmed low-level taxa: Labechia conferta (Lc), Lophiostroma schmidti (Ls), Ecclimadictyon macrotuberculatum (Em) and E. astrolaxum (Ea), Petridiostroma simplex (Ps) and P. linnarssoni (Pl), Actinostromella vaiverensis (Av), Araneosustroma fistulosum (Af), Densastroma pexisum (Dp), Plectostroma intertextum (Pi), Simplexodictyon yavorskyi (Sy), Eostromatopora impexa (Ei), ‘Stromatopora’ venukovi (‘S’v), Syringostromella borealis (Sb) and Parallelostroma typicum (Pt). No new taxa were found. The five most abundant taxa (Lc, Av, Dp, Px, and Sb) total 230 specimens, 64.2% of the MWLF assemblage, consistent with taxa proportions in other Palaeozoic stromatoporoid assemblages. The stromatoporoids have limited growth forms: Lc grew laminar frames, mostly in patch reefs; the other taxa range from laminar to high domical, maximum sizes around 40 cm basal diameter. They almost completely lack the complexities and diversities of form of their contemporaries in nearby large carbonate platforms of Baltica (Gotland/Estonia) and Laurentia (eastern USA","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124287551","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}
Pub Date : 2021-03-31DOI: 10.1080/02693445.2020.1853380
S. Donovan, F. E. Fearnhead
The Palaeontographical Society issues an annual volume of serially numbered publications; these may either be a single complete monograph or part of a continuing monograph.Publication 658, issued a...
{"title":"THE BRITISH DEVONIAN CRINOIDEA. PART 2","authors":"S. Donovan, F. E. Fearnhead","doi":"10.1080/02693445.2020.1853380","DOIUrl":"https://doi.org/10.1080/02693445.2020.1853380","url":null,"abstract":"The Palaeontographical Society issues an annual volume of serially numbered publications; these may either be a single complete monograph or part of a continuing monograph.Publication 658, issued a...","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121412932","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}
Pub Date : 2021-02-11DOI: 10.1080/02693445.2020.1782044
I. Slipper
ABSTRACT Part 2 is concerned with the Order Podocopida, Suborder Cytherocopina, Superfamily Cytheroidea. The stratigraphic occurrence has been determined by examining 2096 specimens, assigned to 74 species-group taxa arranged in 31 genera. Of these, 40 are referred to previously described taxa, nine species and six subspecies are here described as new, one nomen novum is erected, while 17 taxa are left in open nomenclature, 11 of which are compared to previously described taxa. The Lower Turonian shows a pattern of rapidly increasing richness from 20 to 36 species, followed by periods of stasis and gradually increasing standing richness in the Middle Turonian, rising up to a maximum of 76 species in the Upper Turonian. The platycopid signal hypothesis is rejected as an explanation for the high abundances of cytherellids in the Lower Turonian and isolated younger marls in favour of a more complex solution involving oxygenation, oligotrophy, water depth changes, and diagenetic alteration. Examples of evolutionary patterns are given to demonstrate four cases of loss of ornamentation and one of increase in ornamentation.
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Pub Date : 2021-01-02DOI: 10.1080/02693445.2021.1928440
J. Hooker
ABSTRACT Part 1 begins a systematic account of the mammals from the British Solent Group. Their previous study is summarised. The stratigraphy is reviewed and lithostratigraphic logs are provided for the mammal-bearing localities. The new Fort Victoria Member replaces the previous restricted use Cliff End Member in the Headon Hill Formation. Seventeen species-group taxa of the placental euarchontan family Nyctitheriidae are described, with the new genera Actinyctia and Cheilonyctia and the new species Amphidozotherium gassoni, Actinyctia bulbodens, Cheilonyctia lawsoni, Scraeva yulei, Euronyctia curranti and E. plesiolambda. The occurrence of Saturninia mamertensis near the base of the Headon Hill Formation extends its range from the Bartonian to early Priabonian. The occurrence of Oligonyctia hoffmani in the Bembridge Limestone Formation and lower Hamstead Member extends its range from the early Rupelian to the late Priabonian. A phylogenetic analysis of European Bartonian–Rupelian Nyctitheriidae results in an expanded subfamily Amphidozotheriinae and a new subfamily Saturniniinae for Saturninia (s.s.), Cryptotopos and Oligonyctia. Cryptotopos communis and Euronyctia recta from the German Oligocene are transferred to the genus Paradoxonycteris, whilst Sigenyctia (type species S. oligocaena) is synonymised with the genus Euronyctia. Saturninia mamertensis and S. grandis are shown not to be members of this genus. Euronyctia curranti, E. plesiolambda and E. oligocaena form a stratigraphical morphocline, suggestive of an evolutionary sequence. A phylogenetic analysis of primitive eutherians confirms Nyctitheriidae as stem members of the superorder Euarchonta, supporting an earlier analysis. Aspects of evolution, faunal turnovers and diversity of locomotor adaptations during deposition of the Solent Group are discussed.
{"title":"The Mammals of the Late Eocene – Early Oligocene Solent Group","authors":"J. Hooker","doi":"10.1080/02693445.2021.1928440","DOIUrl":"https://doi.org/10.1080/02693445.2021.1928440","url":null,"abstract":"ABSTRACT Part 1 begins a systematic account of the mammals from the British Solent Group. Their previous study is summarised. The stratigraphy is reviewed and lithostratigraphic logs are provided for the mammal-bearing localities. The new Fort Victoria Member replaces the previous restricted use Cliff End Member in the Headon Hill Formation. Seventeen species-group taxa of the placental euarchontan family Nyctitheriidae are described, with the new genera Actinyctia and Cheilonyctia and the new species Amphidozotherium gassoni, Actinyctia bulbodens, Cheilonyctia lawsoni, Scraeva yulei, Euronyctia curranti and E. plesiolambda. The occurrence of Saturninia mamertensis near the base of the Headon Hill Formation extends its range from the Bartonian to early Priabonian. The occurrence of Oligonyctia hoffmani in the Bembridge Limestone Formation and lower Hamstead Member extends its range from the early Rupelian to the late Priabonian. A phylogenetic analysis of European Bartonian–Rupelian Nyctitheriidae results in an expanded subfamily Amphidozotheriinae and a new subfamily Saturniniinae for Saturninia (s.s.), Cryptotopos and Oligonyctia. Cryptotopos communis and Euronyctia recta from the German Oligocene are transferred to the genus Paradoxonycteris, whilst Sigenyctia (type species S. oligocaena) is synonymised with the genus Euronyctia. Saturninia mamertensis and S. grandis are shown not to be members of this genus. Euronyctia curranti, E. plesiolambda and E. oligocaena form a stratigraphical morphocline, suggestive of an evolutionary sequence. A phylogenetic analysis of primitive eutherians confirms Nyctitheriidae as stem members of the superorder Euarchonta, supporting an earlier analysis. Aspects of evolution, faunal turnovers and diversity of locomotor adaptations during deposition of the Solent Group are discussed.","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131490316","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}
Pub Date : 2020-01-02DOI: 10.1080/02693445.2020.1759932
W. Kennedy
ABSTRACT A total of 40 species, assigned to 17 genera, belonging to the Suborder Ancyloceratina are described. One species is new. Sixteen are from the Upper Turonian, nine from the Lower Campanian, and 15 from the Upper Campanian. Eight types of aptychi are described.
{"title":"The Ammonoidea of the Upper Chalk. Part 2","authors":"W. Kennedy","doi":"10.1080/02693445.2020.1759932","DOIUrl":"https://doi.org/10.1080/02693445.2020.1759932","url":null,"abstract":"ABSTRACT A total of 40 species, assigned to 17 genera, belonging to the Suborder Ancyloceratina are described. One species is new. Sixteen are from the Upper Turonian, nine from the Lower Campanian, and 15 from the Upper Campanian. Eight types of aptychi are described.","PeriodicalId":134015,"journal":{"name":"Monographs of the Palaeontographical Society","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133243474","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}
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