Kamiyakawa River, Ino area, Northern Chichibu Belt: Late Aalenian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polycystinea - Spumellaria
Polycystinea - Spumellaria - Pantanelliidae
of Yao (1997)
of Hattori and Sakamoto (1989)
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Hattori (1989)
of Hattori (1987)
of Yao (1997)
Pantanellium riedeli Pessagno 1977
Polycystinea - Spumellaria - Patulibracchiidae
of Hattori (1987)
Polycystinea - Spumellaria - Angulobracchiidae
Paronaella pristidentata Baumgartner 1980
of Yao (1997)
Polycystinea - Spumellaria - Sponguridae
Polycystinea - Spumellaria - Astrosphaeridae
of Yao (1997)
Polycystinea - Spumellaria - Gomberellidae
of Yao (1997)
Polycystinea - Spumellaria - Orbiculiformidae
of Yao (1997)
Polycystinea - Spumellaria - Emiluviidae
of Yao (1997)
of Arakawa (1998)
of Hattori (1989)
Polycystinea - Spumellaria - Archaeospongoprunidae
of Yao (1997)
of Yao (1997)
Polycystinea - Spumellaria - Hagiastridae
of Yao (1997)
of Yao (1997)
of Hattori (1987)
of Arakawa (1998)
Tetraditryma praeplena Baumgartner 1984
(=Tetratrabs sp. E of Hattori, 1988)
Archaeohagiastrum longipes Baumgartner 1995
Polycystinea - Spumellaria - Tritrabidae
Tritrabs simplex Kito and De Wever 1992
Polycystinea - Spumellaria - Parvivaccidae
Acaeniotylopsis variatus Kito and De Wever 1994
Polycystinea - Spumellaria
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Yao (1997)
Polycystinea - Spumellaria - Spongodiscidae
of Yao (1997)
of Yao (1997)
of Yao (1997)
of Yao (1997)
Polycystinea - Spumellaria - Parasaturnalidae
Polycystinea - Spumellaria - Praeconocaryommidae
of Arakawa (1998)
Polycystinea - Spumellaria - Stylosphaeridae
of Yao (1997)
of Yao (1997)
Polycystinea - Nassellaria
Polycystinea - Nassellaria - Hilarisiregidae
Hilarisirex quadrangularis Takemura and Nakaseko 1982
of Yao (1997)
Polycystinea - Nassellaria - Eucyrtidiidae
of Yao (1997)
Polycystinea - Nassellaria - Eucyrtidiellidae
of Hattori (1987)
of Yao (1997)
Eucyrtidiellum aff. gujoense (Takemura and Nakaseko 1986)
Polycystinea - Nassellaria
of Baumgartner et al. (1995)
Polycystinea - Nassellaria - Poulpidae
of Hattori (1989)
Saitoum levium De Wever 1981
Polycystinea - Nassellaria - Ultranaporidae
of Yao (1997)
of Yao (1997)
Napora latissima Takemura 1986
Polycystinea - Nassellaria
Polycystinea - Nassellaria - Ultranaporidae
Napora pyramidalis Baumgartner 1984
Polycystinea - Nassellaria - Archaeodictyomitridae
Polycystinea - Nassellaria - Hsuidae
of Yao (1997)
of Baumgartner et al. (1995)
(=Lupherium sp. A of Hattori, 1987)
of Arakawa (1998)
Polycystinea - Nassellaria - Unumidae
of Arakawa (1998)
of Yao (1997)
Unuma echinatus Ichikawa and Yao 1976
Polycystinea - Nassellaria - Farcidae
Polycystinea - Nassellaria - Williriedellidae
Polycystinea - Nassellaria - Tripedurnulidae
Polycystinea - Nassellaria - Sethocapsidae
of Arakawa (1998)
of Yao (1997)
of Yao (1997)
Polycystinea - Nassellaria - Parvicingulidae
? Dictyomitrella kamoensis Mizutani and Kido 1983
of Suzuki and Ogane (2004)
of Yao (1997)
of Arakawa (1998)
Polycystinea - Nassellaria - Syringocapsidae
(=Sethocapsa? sp. B0 of Yao, 1997)
of Takemura (1986)
Protozoa - Entactinaria - Hexalonchidae
of Yao (1997)
of Yao (1997)
of Yao (1997)
Protozoa - Entactinaria - Saturnalidae
Protozoa - Xiphostylidae
Xiphostylus sp. Haeckel 1881
Protozoa - Actinommidae
of Yao (1997)
see common names

Geography
Country:Japan State/province:Kochi
Coordinates: 33.6° North, 133.3° East (view map)
Paleocoordinates:45.1° North, 154.2° East (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:hand sample
Time
Period: Jurassic Epoch: Middle Jurassic
Stage: Aalenian 10 m.y. bin: Jurassic 4
Key time interval: Late Aalenian
Age range of interval: 174.7 - 170.9 m.y. ago
Stratigraphy
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: lithified "carbonate"
Secondary lithology:gray lithified mudstone
Includes fossils?Y
Lithology description: the radiolarian-bearing manganese nodule was found in a siliceous mudstone block; the sample was taken from a black manganese carbonate nodule
Environment:basinal (siliceous)
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Preservation of anatomical detail:good
Abundance in sediment:abundant
Collection methods and comments
Collection methods:chemical,hydrochloric,sieve,field collection
Minimum sieve size:0.063
Collection size:3000 individuals
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:66916
Authorizer:W. Kiessling Enterer:T. Schossleitner
Modifier:M. Uhen Research group:micropaleontology
Created:2006-10-24 00:44:57 Last modified:2025-02-22 15:12:02
Access level:the public Released:2006-10-24 00:44:57
Creative Commons license:CC0
Reference information

Primary reference:
19037. N. Hori and K. Wakita. 2006. Early Middle Jurrasic (late Aalenian) radiolarian assemblage in a manganese nodule from the Northern Chichibu Belt in the Ino area, Kochi Prefecture, Southwest Japan. Journal of Asian Earth Sciences 27:45-60 [W. Kiessling/T. Schossleitner]