{"title":"Malarossia Berezovsky(始新世,乌克兰)的系统发育关系和贲门鱼类(双壳类,贲门鱼科)的体型演变趋势","authors":"Damián E. Pérez, Anatoly A. Berezovsky","doi":"10.1002/spp2.1578","DOIUrl":null,"url":null,"abstract":"Phylogenetic studies of fossil bivalves are crucial for understanding evolution in both extinct and extant species, and the family Carditidae has received limited research attention in this regard. The endemic genus <jats:italic>Malarossia</jats:italic> comes from the Eocene deposits of Ukraine and the diversity of carditids during this time have been broadly described from North America and Western Europe, although little is known beyond these regions. The aim of this study is to explore the phylogenetic position of the genus <jats:italic>Malarossia</jats:italic> and discuss trends in shell size among carditids. To accomplish this, a phylogenetic analysis was conducted using 51 species and 153 morphological characters. Our findings indicate that <jats:italic>Malarossia</jats:italic> represents an early diverging genus within the subfamily Scalaricarditinae, supported by morphological characters related to development and number of radial ribs, placement of pallial line, and umbones, among others. A wide range in shell size can be seen among carditids, with average values ranging from 3 to 100 mm. Notably, the larger sizes were predominantly observed during the Paleocene–Eocene, in the Venericorini. The Miodomeridinae and Scalaricarditinae had the smallest shell sizes, spanning from the Eocene to the present. Paedomorphic heterochronic processes are suggested for the origin of the small size observed in the Scalaricarditinae subfamily.","PeriodicalId":48705,"journal":{"name":"Papers in Palaeontology","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Phylogenetic relationships of Malarossia Berezovsky (Eocene, Ukraine) and trends in the size evolution of the carditids (Bivalvia, Carditidae)\",\"authors\":\"Damián E. Pérez, Anatoly A. Berezovsky\",\"doi\":\"10.1002/spp2.1578\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Phylogenetic studies of fossil bivalves are crucial for understanding evolution in both extinct and extant species, and the family Carditidae has received limited research attention in this regard. The endemic genus <jats:italic>Malarossia</jats:italic> comes from the Eocene deposits of Ukraine and the diversity of carditids during this time have been broadly described from North America and Western Europe, although little is known beyond these regions. The aim of this study is to explore the phylogenetic position of the genus <jats:italic>Malarossia</jats:italic> and discuss trends in shell size among carditids. To accomplish this, a phylogenetic analysis was conducted using 51 species and 153 morphological characters. Our findings indicate that <jats:italic>Malarossia</jats:italic> represents an early diverging genus within the subfamily Scalaricarditinae, supported by morphological characters related to development and number of radial ribs, placement of pallial line, and umbones, among others. A wide range in shell size can be seen among carditids, with average values ranging from 3 to 100 mm. Notably, the larger sizes were predominantly observed during the Paleocene–Eocene, in the Venericorini. The Miodomeridinae and Scalaricarditinae had the smallest shell sizes, spanning from the Eocene to the present. Paedomorphic heterochronic processes are suggested for the origin of the small size observed in the Scalaricarditinae subfamily.\",\"PeriodicalId\":48705,\"journal\":{\"name\":\"Papers in Palaeontology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-06-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Papers in Palaeontology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.1002/spp2.1578\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PALEONTOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Papers in Palaeontology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1002/spp2.1578","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
Phylogenetic relationships of Malarossia Berezovsky (Eocene, Ukraine) and trends in the size evolution of the carditids (Bivalvia, Carditidae)
Phylogenetic studies of fossil bivalves are crucial for understanding evolution in both extinct and extant species, and the family Carditidae has received limited research attention in this regard. The endemic genus Malarossia comes from the Eocene deposits of Ukraine and the diversity of carditids during this time have been broadly described from North America and Western Europe, although little is known beyond these regions. The aim of this study is to explore the phylogenetic position of the genus Malarossia and discuss trends in shell size among carditids. To accomplish this, a phylogenetic analysis was conducted using 51 species and 153 morphological characters. Our findings indicate that Malarossia represents an early diverging genus within the subfamily Scalaricarditinae, supported by morphological characters related to development and number of radial ribs, placement of pallial line, and umbones, among others. A wide range in shell size can be seen among carditids, with average values ranging from 3 to 100 mm. Notably, the larger sizes were predominantly observed during the Paleocene–Eocene, in the Venericorini. The Miodomeridinae and Scalaricarditinae had the smallest shell sizes, spanning from the Eocene to the present. Paedomorphic heterochronic processes are suggested for the origin of the small size observed in the Scalaricarditinae subfamily.
期刊介绍:
Papers in Palaeontology is the successor to Special Papers in Palaeontology and a journal of the Palaeontological Association (www.palass.org). The journal is devoted to the publication of papers that document the diversity of past life and its distribution in time and space.
Papers in Palaeontology is devoted to the publication of papers that document the diversity of past life and its distribution in time and space. As a sister publication to Palaeontology its focus is on descriptive research, including the descriptions of new taxa, systematic revisions of higher taxa, detailed biostratigraphical and biogeographical documentation, and descriptions of floras and faunas from specific localities or regions. Most contributions are expected to be less than 30 pp long but longer contributions will be considered if the material merits it, including single topic parts.
The journal publishes a wide variety of papers on palaeontological topics covering:
palaeozoology,
palaeobotany,
systematic studies,
palaeoecology,
micropalaeontology,
palaeobiogeography,
functional morphology,
stratigraphy,
taxonomy,
taphonomy,
palaeoenvironmental reconstruction,
palaeoclimate analysis,
biomineralization studies.