A new wood-boring ichnospecies is described from transgressive (lagoonal) deposits of the Lower Cretaceous Sparky Formation (Mannville Group) in west-central Saskatchewan, Canada. Apectoichnus lignummasticans new ichnospecies is a trace fossil that occurs in a thin coal bed and that was emplaced in an in situ xylic substratum (woodground). The ichnofossil is thin, elongate, unbranched, and straight to gently curved with a circular cross section and uniform diameter. Apectoichnus lignummasticans n. isp. is similar in many respects to modern borings in wood that are produced by marine isopods, e.g., Limnoria lignorum Rathke, 1799, for feeding and refugia. The recognition of Apectoichnus lignummasticans n. isp. in the rock record aligns with the modern observation that fossilized wood-boring assemblages should display higher ichnofossil diversities than commonly reported. Additionally, the stratigraphic occurrence of Apectoichnus lignummasticans n. isp. in association with other evidence of marine deposition reaffirms that certain wood boring morphologies (i.e., ichnotaxa) are useful as indicators of marine transgressions.UUID: http://zoobank.org/880e722f-8944-42d7-bc38-423cc5a46413

中文翻译：

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加拿大萨斯喀彻温省下白垩统曼维尔群的一种新的海洋林地鱼鳞

在加拿大萨斯喀彻温省中西部的下白垩统 Sparky 组（Mannville 组）的海侵（泻湖）沉积物中描述了一种新的钻木鱼种。鲶鱼new ichnospecies 是一种微量化石，出现在薄煤层中，位于原位木质基质（木地）中。ichnofossil 是薄的、细长的、不分枝的、笔直的到平缓弯曲的圆形横截面和均匀的直径。鲶鱼n. ISP。在许多方面与海洋等足动物生产的现代木材钻孔相似，例如，柳杉Rathke，1799 年，用于喂养和避难所。的认可鲶鱼n. ISP。在岩石记录中与现代观察结果一致，即化石木钻组合应显示出比通常报道的更高的 ichnofossil 多样性。此外，地层的出现鲶鱼n. ISP。与海洋沉积的其他证据相关，再次证实某些木材钻孔形态（即 ichnotaxa）可用作海洋海侵的指标。UUID：http://zoobank.org/880e722f-8944-42d7-bc38-423cc5a46413