Silurian and Devonian chitinozoans and scolecodonts are recorded from strata of the Hida-Gaien Terrane, central Honshu. Silurian chitinozoans include Eisenackitina, Bursachitina, and the species Angochitina elongata. The latter provides a precise biostratigraphical tie between the Japanese succession and the Type Ludlow Series of the Welsh Borderland, UK, and indicates a Ludlow age (Gorstian or early Ludfordian) for the upper member of the Yoshiki Formation in the Ichinotani Valley. Chitinozoans from other Yoshiki Formation localities contain other specimens of Lagenochitinidae. Scolecodonts are more common than chitinozoans in the palynological residues, but are mostly represented by fragments or minor apparatus elements with a low biostratigraphical value. However, material from the Yoshiki and Fukuji Formations includes several species of Mochtyella as well as representatives of Oenonites, Kettnerites, Lunoprionella, Vistulella? and possibly other placognath taxa. Scolecodonts are also present in the Silurian Middle Member of the Gionyama Formation, Kyushu, including a well-preserved jaw of Pistoprion, and fragments of putative Kettnerites and Oenonites. These finds of scolecodonts suggest close similarity in assemblages between Paleozoic polychaete faunas of Japanese terranes and those of Baltica-Laurentia.

中文翻译：

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来自日本志留纪和泥盆纪的几丁质动物和鳞齿兽

志留纪和泥盆纪几丁质动物和 scolecodonts 记录自 Hida-Gaien Terrane，本州中部的地层。志留纪几丁质动物包括 Eisenackitina、Bursachitina 和 Angochitina elongata。后者提供了日本序列与英国威尔士边疆区的 Ludlow 型系列之间的精确生物地层联系，并表明 Ichinotani 谷 Yoshiki 组上层成员的 Ludlow 时代（Gorstian 或早期 Ludfordian）。来自其他吉木组地区的几丁质动物包含 Lagenochitinidae 的其他标本。在孢粉学残留物中，鳞齿兽比几丁质动物更常见，但主要以碎片或生物地层价值较低的次要器质元素为代表。然而，来自 Yoshiki 和 Fukuji 组的材料包括 Mochtyella 的几种物种以及 Oenonites、Kettnerites、Lunoprionella、Vistulella? 和可能的其他 placognath 分类群。九州祗园山组志留系中段也存在鳞齿兽，包括保存完好的 Pistoprion 颚骨，以及推定的 Kettnerites 和 Oenonites 碎片。这些鳞齿目动物的发现表明日本地体的古生代多毛类动物群与波罗的海-劳伦大陆的多毛类动物群之间的组合非常相似。和推定的 Kettnerites 和 Oenonites 的碎片。这些鳞齿目动物的发现表明日本地体的古生代多毛类动物群与波罗的海-劳伦大陆的多毛类动物群之间的组合非常相似。和推定的 Kettnerites 和 Oenonites 的碎片。这些鳞齿目动物的发现表明日本地体的古生代多毛类动物群与波罗的海-劳伦大陆的多毛类动物群之间的组合非常相似。