Kaseki-Kabe, Kuwajima, Shiramine-mura: Barremian, Japan
collected by H. Matsuo, I. Fujiyama 1975-1977

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Neuroptera - Psychopsidae
1 specimen
NSM-PA12004 (1 measurement)
Insecta - Hemiptera - Neazoniidae
1 specimen
NSM-PA12005
Insecta - Orthoptera - Prophalangopsidae
1 specimen
NSM-PA12002 (forewing) and 12003 (hindwing) thought to come from same specimen (1 measurement)
see common names

Geography
Country:Japan State/province:Ishikawa
Coordinates: 36.2° North, 136.6° East (view map)
Paleocoordinates:45.6° North, 144.0° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Early Cretaceous
Stage: Barremian 10 m.y. bin: Cretaceous 2
Key time interval: Barremian
Age range of interval: 125.77 - 121.4 m.y. ago
Stratigraphy
Geological group:Tetori Formation:Kuwajima
Stratigraphic resolution:group of beds
Stratigraphy comments: Kuwajima Alternation, Itoshiro Subgroup, Tetori Group. Radiometric dating recently reported from the Tetori Group suggested that the age of the Kuwajima Formation is younger than the early Neocomian, probably somewhere between the Barremian to early Aptian (Matsumoto et al. 2006). The zircon -Pb age of 130.7 ± 0.8 (2 SE) Ma from a tuff intercalated in the lower part of the Kuwajima Formation reported by Matsumoto et al. (2006) indicates that the Kuwajima Formation is younger than the latest Hauterivian in age (Gradstein et al. 2004). The Kuwajima Formation is stratigraphically correlated with the Okurodani Formation (Maeda 1952) distributed in the Shokawa district, Takayama City (former Shokawa Village), Gifu Prefecture, central Japan (Maeda 1961b). From the tuff beds of the Okurodani Formation, Kusuhashi et al. (2006) reported zircon U−Pb ages of 132.9 ± 0.9 (2 SE) Ma and 117.5 ± 0.7 (2 SE) Ma, and concluded that the formation is correlated to the Barremian to Aptian. Section at Kaseki-Kabe is assigned to the uppermost part of the Kuwajima Formation (Isaji et al., 2005).
Lithology and environment
Primary lithology: lithified "siliciclastic"
Environment:lacustrine - small Tectonic setting:intramontane basin
Geology comments: Itoshiro Subgroup consists mostly of non-marine sediments. The Kuwajima Sandstone and Shale alteration is intercalated with rich plant and fresh-water molluscan beds, from which the insect fossils were found at Kuwajima. Environments include peat marsh, shallow lake, and vegetated swamp. Deposited in intra-arc basin.
Taphonomy
Modes of preservation:mold/impression
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collectors:H. Matsuo, I. Fujiyama Collection dates:1975-1977
Collection method comments: Repository: National Science Museum, Tokyo
Metadata
Database number:152995
Authorizer:M. Clapham Enterer:M. Manojlovic, M. Clapham
Modifier:M. Carrano Research group:paleoentomology
Created:2013-12-04 21:51:52 Last modified:2025-02-22 15:12:02
Access level:the public Released:2013-12-04 21:51:52
Creative Commons license:CC0
Reference information

Primary reference:
49408. I. Fujiyama. 1978. Some fossil insects from the Tedori Group (Upper Jurassic-Lower Cretaceous), Japan. Bulletin of the National Science Museum, Series C, Geology & Paleontology 4:181-192 [M. Clapham/M. Clapham]

Secondary references:

52226 J. Szwedo. 2008. Distributional and palaeoecological pattern of the Lower Cretaceous Mimarachnidae (Hemiptera: Fulgoromorpha). Entomologia Generalis 31:231-242 [M. Clapham/M. Clapham]