Substrate is a poor ichnotaxobase: a new demonstration
Substrate is a poor ichnotaxobase: a new demonstration
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DOI：
10.1007/s13358-018-0146-0
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发表时间：
2018-03-01
影响因子：
3
通讯作者：
Ewin, Timothy A. M.
中科院分区：
文献类型：
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作者：
Donovan, Stephen K.;Ewin, Timothy A. M.
底物是一种较差的鱼类碱基，但它已被广泛用于区分双壳类动物通常产生的棒状（棒状）钻孔。摩洛哥上白垩纪的燧石结核包裹着成分未知的碎屑（岩石？木材？）的外部模具，该碎屑已被广泛钻孔，产生了小圆柱形和大棒状坑。许多小而短的钻孔被称为 Oichnus isp。参见O. 单纯布罗姆利；否则，Oichnus 通常仅限于有壳基质。更重要的是，棒状钻孔可能是 Gastrochaenolites turbinatus Kelly 和 Bromley，被认为仅限于岩石和贝壳基质，或者是 Teredolites clavatus Leymerie，被认为仅限于木材。这些钻孔在形态上是无法区分的，仅通过基底来区分，因此，它们在本文中被认为是同义的。 Gastrochaenolites clavatus (Leymerie) 优先，是 Teredolites Leymerie 的模式种，现在被认为是 Gastrochaenolites Leymerie 的初级异名。因此，该标本的棒状钻孔被鉴定为 Gastrochaenolites clavatus (Leymerie)。
Substrate is a poor ichnotaxobase, yet it has been widely used for distinguishing the clavate (club-shaped) borings commonly produced by bivalves. A chert nodule from the Upper Cretaceous of Morocco encloses the external mould of a clast of unknown composition (rock? wood?) which had been extensively bored, producing both small cylindrical and large clavate pits. Numerous small, short borings are referred to Oichnus isp. cf. O. simplex Bromley; Oichnus is otherwise commonly limited to shelly substrates. More significantly, the clavate borings may either be Gastrochaenolites turbinatus Kelly and Bromley, considered confined to rock and shelly substrates, or be Teredolites clavatus Leymerie, thought to be limited to wood. These borings are morphologically indistinguishable, only being differentiated by substrate, and thus, they are considered to be synonymous herein. Gastrochaenolites clavatus (Leymerie) has priority and is the type species of Teredolites Leymerie, now considered a junior synonym of Gastrochaenolites Leymerie. Thus, the clavate borings of this specimen are identified as Gastrochaenolites clavatus (Leymerie).