{"title":"底栖有孔虫棘骨结构的功能意义:来自罗马尼亚东北部mililolina cristata Millett, 1898 (mililida)的推论","authors":"S. Dumitriu, Zofia Dubicka, Viorel Ionesi","doi":"10.5194/JM-37-153-2018","DOIUrl":null,"url":null,"abstract":"Abstract. The paper presents Miocene (lower Sarmatian) benthic foraminifera from the\nFH 3 P 1 Rădăuţi Core section from the northwestern part\nof the Moldavian Platform, Romania. Based on foraminiferal assemblages we\ninfer sediments were deposited in shallow-water, including marine-marginal\nenvironments, of varying salinities from brackish to normal marine with some\nshort and rather small sea-level changes. Moreover, we describe for the first\ntime in the Moldavian Platform a very rare species, Miliolina cristata Millett, which presents a characteristic spinose keel. Based on a\ndetailed study of the test morphology and its variability, observed in picked\nmaterial as well as in thin sections, we discuss some palaeoecological\naspects of these foraminifera. M. cristata probably does not\nconstitute a distinctive species, but it is more probable that some miliolid\ntaxa developed such an exoskeletal feature in response to new environmental\nconditions, such as more turbulent water. Accordingly, our study would\nsupport the thesis that one of the functions of the benthic foraminiferal\nspines is to stabilize foraminiferal tests found in sandy substrates from\nhigh-energy environments.","PeriodicalId":54786,"journal":{"name":"Journal of Micropalaeontology","volume":null,"pages":null},"PeriodicalIF":4.1000,"publicationDate":"2018-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The functional significance of the spinose keel structure of benthic foraminifera: inferences from Miliolina cristata Millett, 1898 (Miliolida) from northeast Romania\",\"authors\":\"S. Dumitriu, Zofia Dubicka, Viorel Ionesi\",\"doi\":\"10.5194/JM-37-153-2018\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract. The paper presents Miocene (lower Sarmatian) benthic foraminifera from the\\nFH 3 P 1 Rădăuţi Core section from the northwestern part\\nof the Moldavian Platform, Romania. Based on foraminiferal assemblages we\\ninfer sediments were deposited in shallow-water, including marine-marginal\\nenvironments, of varying salinities from brackish to normal marine with some\\nshort and rather small sea-level changes. Moreover, we describe for the first\\ntime in the Moldavian Platform a very rare species, Miliolina cristata Millett, which presents a characteristic spinose keel. Based on a\\ndetailed study of the test morphology and its variability, observed in picked\\nmaterial as well as in thin sections, we discuss some palaeoecological\\naspects of these foraminifera. M. cristata probably does not\\nconstitute a distinctive species, but it is more probable that some miliolid\\ntaxa developed such an exoskeletal feature in response to new environmental\\nconditions, such as more turbulent water. Accordingly, our study would\\nsupport the thesis that one of the functions of the benthic foraminiferal\\nspines is to stabilize foraminiferal tests found in sandy substrates from\\nhigh-energy environments.\",\"PeriodicalId\":54786,\"journal\":{\"name\":\"Journal of Micropalaeontology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.1000,\"publicationDate\":\"2018-01-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Micropalaeontology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.5194/JM-37-153-2018\",\"RegionNum\":3,\"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":"Journal of Micropalaeontology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.5194/JM-37-153-2018","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
The functional significance of the spinose keel structure of benthic foraminifera: inferences from Miliolina cristata Millett, 1898 (Miliolida) from northeast Romania
Abstract. The paper presents Miocene (lower Sarmatian) benthic foraminifera from the
FH 3 P 1 Rădăuţi Core section from the northwestern part
of the Moldavian Platform, Romania. Based on foraminiferal assemblages we
infer sediments were deposited in shallow-water, including marine-marginal
environments, of varying salinities from brackish to normal marine with some
short and rather small sea-level changes. Moreover, we describe for the first
time in the Moldavian Platform a very rare species, Miliolina cristata Millett, which presents a characteristic spinose keel. Based on a
detailed study of the test morphology and its variability, observed in picked
material as well as in thin sections, we discuss some palaeoecological
aspects of these foraminifera. M. cristata probably does not
constitute a distinctive species, but it is more probable that some miliolid
taxa developed such an exoskeletal feature in response to new environmental
conditions, such as more turbulent water. Accordingly, our study would
support the thesis that one of the functions of the benthic foraminiferal
spines is to stabilize foraminiferal tests found in sandy substrates from
high-energy environments.
期刊介绍:
The Journal of Micropalaeontology (JM) is an established international journal covering all aspects of microfossils and their application to both applied studies and basic research. In particular we welcome submissions relating to microfossils and their application to palaeoceanography, palaeoclimatology, palaeobiology, evolution, taxonomy, environmental change and molecular phylogeny.