Third formation (W3, KM-1) (Cretaceous of Japan)

Where: Fukuoka, Japan (33.8° N, 130.9° E: paleocoordinates 41.1° N, 132.6° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Third Formation (Wakino Group), Neocomian (145.0 - 130.0 Ma)

• The Third Formation (the upper formation W3) correlates to the Lower Wakamiya Formation. The thickness is about 350 - 450 m.

Environment/lithology: terrestrial; lithified, white slate and lithified shale

• 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

Size class: macrofossils

Preservation: adpression

Collection methods: chemical, peel or thin section

• 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.

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 145244: authorized by Mark Bell, entered by Mark Bell on 30.05.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Gonrynchiformes indet.
KMNH VP 100,233
Bivalvia
 Trigoniida - Nakamuranaiadidae
Gastropoda
 Architaenioglossa - Viviparidae
 Cerithioidea - Thiaridae
Actinopteri
 Leptolepidiformes - Leptolepididae
Paraleptolepis elegans Yabumoto 1994
holotype: KMNH VP 100,227; paratypes: 228-232
Paraleptolepis kikuchii n. gen. n. sp. Yabumoto 1994
holotype: KMNH VP 100,222; paratypes: 223-226
 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
 Ichthyodectiformes -
Chuhsiungichthys sp. Yabumoto 1994
KMNH VP 100,152-154