Cyclohelenina Formosaensis Gen. Nov. ET SP. Nov.: a New Benthic foraminifer from Southern Taiwan

IF 0.9 4区 地球科学 Q4 PALEONTOLOGY
C. Chien, Yuan‐Pin Chang, Kenn-ming Yang
{"title":"Cyclohelenina Formosaensis Gen. Nov. ET SP. Nov.: a New Benthic foraminifer from Southern Taiwan","authors":"C. Chien, Yuan‐Pin Chang, Kenn-ming Yang","doi":"10.2113/gsjfr.50.3.301","DOIUrl":null,"url":null,"abstract":"\n A new benthic foraminiferal genus and species of Heleninidae was discovered in estuarine sediments of the Sihchong River, western Hengchun Peninsula, Southern Taiwan. Similar to the resembling genus Helenina, Cyclohelenina gen. nov. displays distinct sutural incisions on both spiral and umbilical sides. However, it exhibits relatively coarser perforation of the wall, more roundness along the equatorial outline, and a wider range in the number of chambers (7–10) in the last whorl compared to other Heleninidae genera. This new genus can provide a suitable taxonomical unit for the assignments of several undetermined species that were previously classified to but distinguishable from the genera “Pseudoeponides” and Helenina.\n In this research, we examined and measured 58 syntypes and one ideotype (from the Kangkou River on the east flank of Hengchun Peninsula) of Cyclohelenina formosaensis sp. nov., the type species of the new genus. Under the concept of functional morphology, the hispid ornamentation found to be present around every opening on the test of C. formosaensis suggests that it may be an herbivore. Observations of yellowish-green stains within fresh tests (evidence for chlorophyll from their food source) are consistent with this inference. The test with low-trochospiral shape and sutural incisions on both sides indicated that C. formosaensis may prefer hyposaline habitats with sandy silt and sand substrates in tide-influenced environments, which is consistent with environment properties of the type locality of the new species.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":"132 44","pages":"301-312"},"PeriodicalIF":0.9000,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/gsjfr.50.3.301","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Foraminiferal Research","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.2113/gsjfr.50.3.301","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
引用次数: 1

Abstract

A new benthic foraminiferal genus and species of Heleninidae was discovered in estuarine sediments of the Sihchong River, western Hengchun Peninsula, Southern Taiwan. Similar to the resembling genus Helenina, Cyclohelenina gen. nov. displays distinct sutural incisions on both spiral and umbilical sides. However, it exhibits relatively coarser perforation of the wall, more roundness along the equatorial outline, and a wider range in the number of chambers (7–10) in the last whorl compared to other Heleninidae genera. This new genus can provide a suitable taxonomical unit for the assignments of several undetermined species that were previously classified to but distinguishable from the genera “Pseudoeponides” and Helenina. In this research, we examined and measured 58 syntypes and one ideotype (from the Kangkou River on the east flank of Hengchun Peninsula) of Cyclohelenina formosaensis sp. nov., the type species of the new genus. Under the concept of functional morphology, the hispid ornamentation found to be present around every opening on the test of C. formosaensis suggests that it may be an herbivore. Observations of yellowish-green stains within fresh tests (evidence for chlorophyll from their food source) are consistent with this inference. The test with low-trochospiral shape and sutural incisions on both sides indicated that C. formosaensis may prefer hyposaline habitats with sandy silt and sand substrates in tide-influenced environments, which is consistent with environment properties of the type locality of the new species.
Formosaensis Cyclohelenina Gen.Nov.ET SP.11.:台湾南部一种新的底栖有孔虫
在台湾南部恒春半岛西部四冲河河口沉积物中发现一种新的底栖有孔虫属和种。类似于类似的Helenina属,Cycloelenina gen.nov.在螺旋和脐带两侧都有明显的缝合切口。然而,与其他Heleninidae属相比,它的壁穿孔相对较粗,沿赤道轮廓更圆,最后一轮的腔室数量范围更广(7-10个)。这个新属可以提供一个合适的分类单元,用于分配几个先前被分类为“Pseudoeponides”和Helenina属但可与之区分的未确定物种。本研究对恒春半岛东侧康口河的新属模式种台湾环helenina formosaensis sp.nov.的58个同型和1个同型进行了测定。在功能形态学的概念下,在对formosaensis的测试中,发现其每个开口周围都有长毛纹饰,这表明它可能是一种食草动物。新鲜测试中黄绿色斑点的观察结果(食物来源的叶绿素证据)与这一推断一致。低钩旋体形状和两侧缝合切口的试验表明,在潮汐影响的环境中,台湾藻可能更喜欢沙质淤泥和沙质基质的低盐度栖息地,这与新物种类型地的环境特性一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Journal of Foraminiferal Research
Journal of Foraminiferal Research 地学-古生物学
CiteScore
2.10
自引率
9.10%
发文量
32
审稿时长
>12 weeks
期刊介绍: JFR publishes original papers of international interest dealing with the Foraminifera and allied groups of organisms. Review articles are encouraged.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信