This is the first of two comprehensive taxonomic works on the early Miocene (ca. 23–20 Ma) bryozoan fauna associated with coral reefs from the Siamaná Formation, in the remote region of Cocinetas Basin in the La Guajira Peninsula, northern Colombia, southern Caribbean. Fifteen bryozoan species in 11 families are described, comprising two cyclostomes and 13 cheilostomes. Two cheilostome genera and seven species are new: Antropora guajirensis n. sp., Calpensia caribensis n. sp., Atoichos magnus n. gen. n. sp., Gymnophorella hadra n. gen. n. sp., Cribrilaria multicostata n. sp., Cribrilaria nixor n. sp., and Figularia bragai n. sp. Eight species are identified only at genus level and remain in open nomenclature. Of the species found, 27% have erect colonies and 73% encrusting colonies. Both types contributed to the reef framework and produced sediment. The observed bryozoan diversity was higher in the barrier reefs than in the lagoonal patch reefs.UUID: http://zoobank.org/5c8468ef-31b0-4e7e-ba93-60a2e2f30b76.

中文翻译：

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来自哥伦比亚的早中新世珊瑚礁相关苔藓虫。第一部分：Cyclostomata、“Anasca”和 Cribrilinoidea Cheilostomata

这是关于早中新世（约 23-20 Ma）与来自 Siamaná 组的珊瑚礁相关的苔藓虫动物群的两项综合分类学著作中的第一篇，位于哥伦比亚北部拉瓜希拉半岛的 Cocinetas 盆地偏远地区. 描述了 11 个科的 15 种苔藓虫物种，包括 2 个环口动物和 13 个唇口动物。两个cheilostome属和七个种是新的：瓜吉鹿角龙n. sp.,加勒比卡彭西亚n. sp.,阿托伊科斯马格努斯n. 将军 n. sp.,裸藻n. 将军 n. sp.,多肋卷螟n. sp.,尼克松卷尾藻n. sp.，和无花果n. sp。仅在属水平上确定了八个物种，并保留在开放的命名法中。在发现的物种中，27% 有直立菌落，73% 有结壳菌落。两种类型都有助于珊瑚礁框架并产生沉积物。在堡礁中观察到的苔藓虫多样性高于泻湖斑块礁。UUID：http://zoobank.org/5c8468ef-31b0-4e7e-ba93-60a2e2f30b76.