山口県西部に分布する三畳系美祢層群とジュラ系豊浦層群の層序と化石群

Maeda, Haruyoshi; Oyama, Nozomu

doi:10.5575/geosoc.2019.0020

Cited by 4 publications

(4 citation statements)

References 22 publications

(4 reference statements)

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“…1 ). The stratigraphic setting is subdivided into three strata: the Hirabara, Momonoki, and Aso Formations, in ascending order 29 , 30 . Study material was obtained from the Momonoki Formation, which yields the most abundant fossil plants and insects 31 , 32 .…”

Section: Methodsmentioning

confidence: 99%

“…Notably, the Momonoki Formation yields true flies 36 , albeit undescribed, which have only been recorded from a few deposits from the Middle–Late Triassic 46 – 51 . Although more than 6000 specimens of fossil insects are recorded from this formation 30 , 36 , the taxonomic diversity is largely unexplored, and numerous terrestrial and aquatic insect specimens remain undescribed. At present, 18 species in ten families belonging to seven orders are described 32 – 35 , 45 .…”

Section: Methodsmentioning

confidence: 99%

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Oldest leaf mine trace fossil from East Asia provides insight into ancient nutritional flow in a plant–herbivore interaction

Imada

Oyama

Shinoda³

et al. 2022

Sci Rep

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The Late Triassic saw a flourish of plant–arthropod interactions. By the Late Triassic, insects had developed all distinct strategies of herbivory, notably including some of the earliest occurrences of leaf-mining. Herein we describe exceptionally well-preserved leaf-mine trace fossils on a Cladophlebis Brongniart fern pinnule from the Momonoki Formation, Mine Group, Japan (Middle Carnian), representing the oldest unequivocal leaf-mines from East Asia. The mines all display a distinctive frass trail—a continuous meandering line, which later becomes a broad band containing spheroidal particles—demonstrating larval development. Although the shapes of the frass trails are generally comparable to those of Lepidoptera or Coleoptera, they cannot be unequivocally assigned to a specific extant leaf-mining taxon. Furthermore, elemental analyses by X-ray fluorescence (XRF) reveals that the frass trail comprises phosphate coprolites. The quantitative variations in P, S, and Si between coprolites and leaf veins may reflect physiological processes (e.g., consumption, absorption, and excretion) mediated by plant chemicals. Our findings reinforce the idea that leaf-mining had become a pervasive feeding strategy of herbivorous insects by the Late Triassic.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Oldest leaf mine trace fossil from East Asia provides insight into ancient nutritional flow in a plant–herbivore interaction

Imada

Oyama

Shinoda³

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…1). The stratigraphic setting is subdivided into three strata: the Hirabara, Momonoki, and Aso Formations, in ascending order 28,29 . Study material was obtained from the Momonoki Formation, which yields the most abundant fossil plants and insects 30,31 .…”

Section: Geological Settingmentioning

confidence: 99%

“…Although more than 6000 specimens of fossil insects are recorded from this formation 29,36 , the taxonomic diversity is largely unexplored, and numerous terrestrial and aquatic insect specimens remain undescribed. At present, 18 species in ten families belonging to seven orders are described 31,[33][34][35]43 .…”

Section: Palaeobiological Settingmentioning

confidence: 99%

Oldest Leaf-Mine Trace Fossil from East Asia and Stoichiometric Footprint: Insight Into Ancient Nutritional Flow in a Plant–Herbivore Interaction

Imada

Oyama

Shinoda³

et al. 2021

Preprint

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The Late Triassic saw a flourish of plant–arthropod interactions. By the Late Triassic, insects had developed all distinct strategies of herbivory, notably including some of the earliest occurrences of leaf-mining. Herein we describe exceptionally well-preserved leaf-mine trace fossils on a Cladophlebis fern pinnule from the Momonoki Formation, Mine Group, Japan (Middle Carnian), representing the oldest unequivocal leaf-mines from East Asia. The mines all display a distinctive frass trail – a continuous meandering line, which later becomes a broad blotch containing spheroidal particles – demonstrating larval development. The shapes of these mines generally resemble those of nepticuloid moths, although they are absent from extant fern-mining assemblages. Furthermore, elemental analyses by X-ray fluorescence (XRF) reveals that the frass trail comprises phosphate coprolites. The quantitative variations in P, S, and Si between coprolites and leaf veins may reflect physiological processes (consumption, absorption, and excretion) mediated by plant chemicals. Our findings reinforce the idea that leaf-mining had become a pervasive feeding strategy of herbivorous insects by the Late Triassic.

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A new freshwater lonchidiid hybodontiform shark (Chondrichthyes, Elasmobranchii) from the Upper Triassic Momonoki Formation in Yamaguchi, JapanCitation for this article: Breeden III, B. T., Oyama, N., Manabe, M., Takahashi, H., & Sakata, C. (2024) A new freshwater lonchidiid hybodontiform shark (Chondrichthyes, Elasmobranchii) from the Upper Triassic Momonoki Formation in Yamaguchi, Japan. Journal of Vertebrate Paleontology . https://doi.org/10.1080/02724634.2024.2322749

Breeden,

Oyama,

Manabe

et al. 2023

Journal of Vertebrate Paleontology

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山口県西部に分布する三畳系美祢層群とジュラ系豊浦層群の層序と化石群

Cited by 4 publications

References 22 publications

Oldest leaf mine trace fossil from East Asia provides insight into ancient nutritional flow in a plant–herbivore interaction

Oldest leaf mine trace fossil from East Asia provides insight into ancient nutritional flow in a plant–herbivore interaction

Oldest Leaf-Mine Trace Fossil from East Asia and Stoichiometric Footprint: Insight Into Ancient Nutritional Flow in a Plant–Herbivore Interaction

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