Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera "Globigerinoides", and description of the new genus Trilobatus.
Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera "Globigerinoides", and description of the new genus Trilobatus.
复制标题
DOI：
10.1371/journal.pone.0128108
复制
发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Stalder C
中科院分区：
文献类型：
--
作者：
Spezzaferri S;Kucera M;Pearson PN;Wade BS;Rappo S;Poole CR;Morard R;Stalder C
浮游有孔虫是海洋中数量最多、种类最多的原生生物之一。它们作为古代理的效用需要严格的分类和与生活和遗传相关的同行比较。我们合并的“Globigerinoides”的遗传和化石证据，其特点是补充孔的螺旋侧，在一个新的方法来跟踪他们的“总证据的起源”，因为他们在最新的古近纪首次出现。结合化石和分子遗传学数据表明，这个属，传统上理解，是多系的。这两个数据集都表明存在两个独立进化的不同谱系。一类包括“Globigerinoides”trilobus及其后代，现存的“Globigerinoides”sacculifer，Orbulina universa和Sphaeroidinella dehiscens。第二组包括Globigerinoides ruber进化枝，现存的G.和G. elongatus和祖先。在分子分类学中，三叶组不是橡胶组的姐妹分类单元。Ruber组与现代Globoturborotalita rubescens一直聚在一起，是一个姐妹分类群。化石记录的重新分析表明，渐新世晚期的第一个Globigerinoides是trilobus组的祖先，而Ruber组最早出现在中新世的底部，其代表不同于trilobus组。因此，目前所定义的“Globigerinoides”属的多元性只能通过扩大属的概念以包括G. rubescens和大量的化石物种没有补充孔，或者如果三叶草组被分配到一个单独的属。由于前者是不可行的，由于缺乏一个明确的诊断，这样一个广泛的属，我们建立了一个新的属Trilobatus的三叶组（模式种Globigerina triloba Reuss）和修正Globoturborotalita和Globigerinoides澄清这些属的形态和壁纹理。在新的概念中，Trilobatus n.属是并系的，并产生了Praeorbulina / Orbulina和Sphaeroidinellopsis / Sphaeroidinella谱系。
Planktonic foraminifera are one of the most abundant and diverse protists in the oceans. Their utility as paleo proxies requires rigorous taxonomy and comparison with living and genetically related counterparts. We merge genetic and fossil evidence of “Globigerinoides”, characterized by supplementary apertures on spiral side, in a new approach to trace their “total evidence phylogeny” since their first appearance in the latest Paleogene. Combined fossil and molecular genetic data indicate that this genus, as traditionally understood, is polyphyletic. Both datasets indicate the existence of two distinct lineages that evolved independently. One group includes “Globigerinoides” trilobus and its descendants, the extant “Globigerinoides” sacculifer, Orbulina universa and Sphaeroidinella dehiscens. The second group includes the Globigerinoides ruber clade with the extant G. conglobatus and G. elongatus and ancestors. In molecular phylogenies, the trilobus group is not the sister taxon of the ruber group. The ruber group clusters consistently together with the modern Globoturborotalita rubescens as a sister taxon. The re-analysis of the fossil record indicates that the first “Globigerinoides” in the late Oligocene are ancestral to the trilobus group, whereas the ruber group first appeared at the base of the Miocene with representatives distinct from the trilobus group. Therefore, polyphyly of the genus "Globigerinoides" as currently defined can only be avoided either by broadening the genus concept to include G. rubescens and a large number of fossil species without supplementary apertures, or if the trilobus group is assigned to a separate genus. Since the former is not feasible due to the lack of a clear diagnosis for such a broad genus, we erect a new genus Trilobatus for the trilobus group (type species Globigerina triloba Reuss) and amend Globoturborotalita and Globigerinoides to clarify morphology and wall textures of these genera. In the new concept, Trilobatus n. gen. is paraphyletic and gave rise to the Praeorbulina / Orbulina and Sphaeroidinellopsis / Sphaeroidinella lineages.
登录
查看更多内容
影响因子：
--
作者：
Darling, KF;Kucera, M;Pak, D
通讯作者：
Pak, D
影响因子：
1.9
作者：
Darling, KF;Wade, CM;Brown, AJL
通讯作者：
Brown, AJL
影响因子：
3.9
作者：
deVargas, C;Zaninetti, L;Pawlowski, J
通讯作者：
Pawlowski, J
影响因子：
6.5
作者：
Guindon, Stephane;Dufayard, Jean-Francois;Gascuel, Olivier
通讯作者：
Gascuel, Olivier
影响因子：
1.9
作者：
BRUMMER, GJA;HEMLEBEN, C;SPINDLER, M
通讯作者：
SPINDLER, M