Tsukagoshi Minoru

Independent Researcher

We described the external morphology of a fossil insect gall collected from the middle Pleistocene sediment in the Osaka Group of Nishinomiya City, Hyogo Prefecture, western Japan. The fossil was well preserved without major compression and was identified as a gall induced by an aphid species of the genus Nipponaphis (Nipponaphidini: Hormaphidinae:...

Ester-bound compounds (compounds released by saponification) from the resistant macromolecules (RMMs) were analyzed in the extant and Pliocene fossil Liquidambar fruit from the Tokai Group distributed in Gifu Prefecture, central Japan. We compared the distributions of the ester-bound triterpenoids from the fossil with those of free and ester-bound...

Premise of research. Osmunda regalis has a worldwide distribution, except for in eastern Asia, where Osmunda japonica and Osmunda lancea can be found instead. However, the present geographic separation does not necessarily mean geographical speciation. Molecular data indicated that American O. regalis is sister to O. japonica and O. lancea rather t...

Pinus trifolia Miki 1939 (Pinaceae) was originally proposed based on seed cones from the upper Miocene of Aichi and Gifu Prefectures, central Japan. However, before the publication of P. trifolia, a different name (Pinus fujiii (Yasui) Miki) was given to a female cone with the same morphology. On the other hand, P. fujiii auct. non (Yasui) Miki has...

Morphological character matrix used for phylogenetic analyses. (NEX)

Backbone constraint tree used for phylogenetic analyses. (NEX)

Specimens used for this study. (XLSX)

Extant pines of subsection Pinus (section Pinus, genus Pinus, Pinaceae) are predominantly distributed in Eastern Asia. However, the extent of diversification in the section has yet to be fully clarified. We reviewed fossil records of subsection Pinus from Japan and collected permineralized materials, in which anatomical details are preserved for be...

We investigated the products released by hydrolysis of the resistant macromolecules of fossil dry fruits of angiosperms (Liquidambar and Nyssa) from the Pliocene fluvial sediments of the Tokai Group (central Japan), as well as extant dry fruits of Liquidambar, with respect to examining the chemotaxonomic potential and diagenetic alteration of these...

International Symposium, "The Origin and Evolution of Natural Diversity". 1–5 October 2007. Sapporo, Japan. Pyrolytic analysis was performed on a leaf fossil, containing a gall-like spherule structure, from the Eocene Ikushunbetsu Formation in the Yubari area, Hokkaido, Japan, in order to examine the potential and applicability of the geochemical m...

愛媛県肱川流域の大洲・内子盆地では, 河川～扇状地成の厚い砂礫層を主体とする下部―中部更新統が分布する. これらは下位より冨士山層, 内子層, 大洲層に区分でき, 上位を段丘堆積物 (古田層, 菅田層, 廿日市層) に覆われる. 火山灰層と植物化石に着目し, 堆積年代を検討した結果, 冨士山層, 大洲層, 古田層から産出する火山灰層が, それぞれピンク火山灰層, 横尾火砕流, Aso-1に対比された. また, 冨士山層, 内子層下部ではメタセコイアとヒメバラモミ近似種が共産することから, 冨士山層および内子層下部で遅くとも1.4～0.8Ma, 大洲層で0.8～0.5Ma, 高位段丘堆積物古田層では約0.3～0.2Maの年代が求められた. この結果, 本地域の下部―中部更新統は, 中央構造線沿...

岐阜県多治見市大洞地区の中新統土岐口陶土層の堆積相を調査し, そこに含まれる植物化石の組成, 堆積構造, 堆積物の粒度組成を調べた. ここでは, 10堆積相が認定でき, 湖沼・湿地に近接した網状河川システムが復元された. このことから, 砂・泥の卓越する河川～湖沼・湿地の堆積環境が, 東海層群下部の陶土層の堆積盆地に共通していることが明らかになった. さらに, 大型植物化石の産状から, 植物片の運搬・堆積過程について考察した. 1) 洪水流堆積物中の大型植物化石には, ベッドロードとして堆積するものと, 浮遊沈降して堆積するものが存在すること, 2) 両者の違いは, 植物片の大きさ, 細毛表面といった形態の違いに左右されること, 3) 植物化石は, 水理学的淘汰を受けて堆積したこと, 4)...