Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
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DOI：
10.1080/14772019.2019.1578831
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发表时间：
2019-05-04
影响因子：
2.6
通讯作者：
Wade, Bridget S.
中科院分区：
文献类型：
--
作者：
Poole, Christopher R.;Wade, Bridget S.
现存的三叶三叶丛形态种（T. sacculifer、T.quadrilobatus、T.immaturus 和 T.trilobus）具有广泛的生物地理分布和较长的地层范围，因此常用于古海洋学研究。后代形态种 Globigerinoidesella fisulosa 分布范围相对较短（上新世-更新世），是重要的生物地层标记。然而，这些形态种的分类概念在工作者之间应用不一致，导致信息丢失和无法比较的数据集。我们使用基于种群和类型学相结合的方法，对每个形态种进行了分类学评估，包括详细的分类历史和对其形态概念的细化。形态测量数据和扫描电子显微镜用于说明 Trilobatus sacculifer 丛的形态整合。 Globigerinoidesella fisulosa 的独特形态被证明是从 T. sacculifer 丛发展而来（如先前记录的），但也从丛中的其他形态种发展而来，这提供了第一个化石证据，证明 T. sacculifer 丛的四个形态种是同一物种。我们的新分析支持现有标本的培养和分子遗传学证据，表明四种 T. sacculifer 丛形态种是相同的生物物种。然而，我们主张使用四种形态种概念（T. sacculifer、T.quadrilobatus、T.immaturus 和 T.trilobus）和 G.fistulosa（此处经过精炼），以增加其古生态学和生物地层学价值。
The extant morphospecies of the Trilobatus sacculifer plexus (T. sacculifer, T. quadrilobatus, T. immaturus and T. trilobus) have widespread biogeographical distributions and long stratigraphical ranges, and are thus routinely utilized in palaeoceanographical studies. The descendant morphospecies Globigerinoidesella fistulosa is comparatively short-ranging (Pliocene-Pleistocene) and an important biostratigraphical marker. However, taxonomic concepts of these morphospecies are inconsistently applied between workers, leading to loss of information and incomparable datasets. We present a taxonomic appraisal of each morphospecies, including detailed taxonomic histories and refinement of their morphological concepts, using a combined population-based and typological approach. Morphometric data and scanning electron microscopy are used to illustrate morphological intergradation in the Trilobatus sacculifer plexus. The distinctive morphology of Globigerinoidesella fistulosa is shown to develop from T. sacculifer (as previously documented), but also from the other morphospecies in the plexus, providing the first fossil evidence demonstrating that the four morphospecies of the T. sacculifer plexus are the same species. Our new analyses support culturing and molecular genetic evidence from extant specimens that suggests the four T. sacculifer plexus morphospecies are the same biological species. However, we advocate using the four morphospecies concepts (T. sacculifer, T. quadrilobatus, T. immaturus and T. trilobus) and G. fistulosa, here refined, to increase their palaeoecological and biostratigraphical value.