Compressed files from SEM and stereomicroscope images of benthic foraminifera species from the Southeast Pacific@en

This study developed a unified taxonomic classification system for recent epifaunal benthic foraminifera species collected from surface sediment samples along the Southeast Pacific margin, including Cibicidoides wuellerstorfi, C. lobatulus, C. cf. ungerianus, Planulina ariminensis, P. ornata, and P. limbata. Morphological characteristics of these epifaunal benthic foraminifera specimens, such as test shape, periphery, chamber inflation, elongation, suture curvature, and wall porosity, were measured between December 2022 and June 2023. Furthermore, variations in morphological features like planoconvex tests, proloculus size, suture curvature, and pore patterns were observed among these foraminifera. The surface sediment samples were collected off the coasts of Chile and Peru between 1962 and 2014, covering latitudes from 12.70°S to 44.09°S and water depths ranging from 24 to 3,267 m. The temporal coverage of the samples spans the Holocene, with a focus on the late Holocene and modern samples. These samples were collected using various gear devices, including a multicorer (Sonne 156, Sonne 211, Meteor 92), a box corer (BIAC072014), a Petersen grab (USNS Eltanin), and a gravity core (Sonne 161). Detailed morphological examinations of the specimens were conducted using TM4000Plus HITACHI SEM imaging and a Leica S8 APO stereomicroscope, complemented by manual illustrations. The unified taxonomic criteria will enhance the accuracy of foraminifera-based proxies, such as stable isotopes and morphological studies, which are vital for paleoceanographic reconstructions.本研究针对东南太平洋边缘表层沉积物样品中采集的现生表生底栖有孔虫（epifaunal benthic foraminifera）物种，建立了一套统一的分类系统，所涉及物种包括Cibicidoides wuellerstorfi、C. lobatulus、C. cf. ungerianus、Planulina ariminensis、P. ornata及P. limbata。2022年12月至2023年6月期间，对这些表生底栖有孔虫标本的形态特征进行了测量，包括壳形、壳缘、房室膨凸度、伸长率、缝合线弯曲度及壳壁孔隙度。此外，本研究还观察到这些有孔虫在平凸壳、初房大小、缝合线弯曲度及孔隙样式等形态特征上存在变异。本次研究所用表层沉积物样品于1962年至2014年间采自智利与秘鲁近岸海域，覆盖南纬12.70°至44.09°的纬度范围，水深区间为24至3267米。样品的时间跨度涵盖全新世，研究重点聚焦晚全新世与现代样品。样品采集使用了多种采样装置，包括多管取样器（Sonne 156、Sonne 211、Meteor 92）、箱式取样器（BIAC072014）、彼得森采泥器（USNS Eltanin）以及重力柱状取样器（Sonne 161）。对标本的详细形态学检测采用了日立TM4000Plus扫描电子显微镜（SEM）与徕卡S8 APO体视显微镜，并辅以手工绘图。这套统一的分类标准将提升基于有孔虫的代用指标（如稳定同位素分析与形态学研究）的准确性，而此类指标对于古海洋重建工作具有重要价值。