Abstract This study describes and discusses bryozoan taxa and borings associated with carbonate fragments and bioclasts from Destacamento Rio Salado Member, Canal de las Escobas Formation, mid-Holocene of northeastern Buenos Aires Province, Argentina. Three species of encrusting bryozoans were found co-occurring with borings: Biflustra puelcha, Conopeum reticulum and Electra arcuata comb. nov. In addition, bilaminar fragments of Hippomonavella charrua showing considerable surface abrasion were also found among the carbonate clasts. C. reticulum, formerly regarded as a cryptogenic species in Argentine harbours, is present in the Southwest Atlantic at least since the mid-Holocene, so it should be considered as a native species in the area. Borings comprise Gastrochaenolites isp., Trypanites isp., Maeandropolydora isp., Entobia isp. and Caulostrepsis isp. The co-occurrence of bryozoans and borings suggests that the carbonate fragments were transported from an abrasion platform when they were already bored, and then they were encrusted by the bryozoans at the study site, a tidal flat depositional environment.

中文翻译：

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来自 Destacamento Río Salado Member（阿根廷布宜诺斯艾利斯省）的苔藓虫和钻孔：系统学和古环境

摘要 本研究描述并讨论了与来自阿根廷布宜诺斯艾利斯省东北部全新世中全新世 Canal de las Escobas 组 Destacamento Rio Salado 成员的碳酸盐碎片和生物碎屑相关的苔藓动物分类群和钻孔。发现三种结壳苔藓虫与钻孔共存：Biflustra puelcha、Conopeum reticulum 和 Electra arcuata comb。十一月 此外，在碳酸盐碎屑中还发现了显示出相当大的表面磨损的 Hippomonavella charrua 的双层碎片。C. reticulum 以前被认为是阿根廷港口的隐源物种，至少自全新世中期以来就存在于西南大西洋，因此应将其视为该地区的本地物种。钻孔包括 Gastrochaenolites isp.、Trypanites isp.、Maeandropolydora isp.、Entobia isp.。和 Caulostrepsis isp。苔藓虫和钻孔的同时出现表明碳酸盐碎片是在它们已经钻孔时从磨损平台运来的，然后它们被研究地点的苔藓虫包裹，这是一个潮滩沉积环境。