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

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