Third formation (W3, KM-1): Neocomian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Gonrynchiformes indet.
KMNH VP 100,233
Gastropoda - Thiaridae
Brotiopsis kobayashii
Gastropoda - Viviparidae
Viviparus onogoensis
Bivalvia - Trigoniida - Nakamuranaiadidae
Nakamuranaia cf. chingshanensis
Actinopteri - Osteoglossiformes - Wakinoichthiidae
Wakinoichthys robustus n. sp. Yabumoto 1994
holotype: KMNH VP 100,188; paratypes: 189-191
Wakinoichthys aokii Yabumoto 1994
holotype: KMNH VP 100,140; paratype: 184-187
Actinopteri - Leptolepidiformes - Leptolepididae
Paraleptolepis kikuchii n. gen., n. sp. Yabumoto 1994
holotype: KMNH VP 100,222; paratypes: 223-226
Paraleptolepis elegans Yabumoto 1994
holotype: KMNH VP 100,227; paratypes: 228-232
Actinopteri - Ichthyodectiformes
Chuhsiungichthys sp. Yabumoto 1994
KMNH VP 100,152-154
see common names

Geography
Country:Japan State/province:Fukuoka
Coordinates: 33.8° North, 130.9° East (view map)
Paleocoordinates:41.1° North, 132.6° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Key time interval:Neocomian
Age range of interval:145.00000 - 130.00000 m.y. ago
Stratigraphy
Geological group:Wakino Formation:Third
Stratigraphy comments: The Third Formation (the upper formation W3) correlates to the Lower Wakamiya Formation. The thickness is about 350 - 450 m.
Lithology and environment
Primary lithology:red or brown,white lithified slate
Secondary lithology: lithified "shale"
Includes fossils?Y
Includes fossils?Y
Lithology description: It is composed mainly of sandstone, with alternating sandstone and shale, siliceous shale and tuff and others. Fish fossils are found in the well laminated yellowish white and reddish-brown slate
Environment:terrestrial indet.
Taphonomy
Modes of preservation:adpression
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some genera
Collection methods:chemical,peel or thin section
Reason for describing collection:taxonomic analysis
Collection method comments: All fossil specimens used in the present study are deposited in the Kitakyushu Museum and Institute of Natural History (NMNH)

Some specimens were immersed in a bath of 20% HCl and 80% water in 24-48 hours to etch their bones. Latex peels were made from the etched fossils for observation.

The outline of large specimens were drawn by tracing the enlarged positive films and detailed drawings were made with a binocular microscope.
Metadata
Database number:145244
Authorizer:M. Bell Enterer:M. Bell
Modifier:M. Bell
Created:2013-05-30 20:37:12 Last modified:2013-05-30 07:34:49
Access level:the public Released:2013-05-30 20:37:12
Creative Commons license:CC BY
Reference information

Primary reference:

46901. Y. Yabumoto. 1994. Early Cretaceous freshwater fish fauna in Kyushu, Japan. Bulletin of the Kitakyushu Museum of Natural History 13:107-254 [M. Bell/M. Bell]