Fossils around Lake-Inba
May 25, 2003

This corner introduces some fossils which were collected by my family around the Lake-Inba which is located about 50 km far from east direction of central of Tokyo.

The plateau around Tokyo about 0.3 million years ago in the period of Pleistocene was covered by sea, and so many creatures such as shells and sea urchins have benn piled from that period. It is called as Narita Formation now, and more than 200 kinds of fossils such as shells and sea urchins have been reported as of today.

This corner introduces a small number of fossils in the Narita Formation. But, if you enjoy the tour of this corner, it is very much appreciated.

October 2000, by Watacchi
Note) If you want to see more larger picture, click your mouse on each thumbnail.
** BIVALVIA **
Tresus keenae (Kuroda et Habe) Panopea japonica A. Adams Solecurtus divaricatus divaricatus (Lischke) Glycymeris vestita (Dunker) Scaphara subcrenata (Lischke) Saxidomus purpuratus (Sowerby)
IB001 IB002 IB008 IB012 IB013 IB018
Dosinella Penicillata (Reeve) Tapes variegates kioroshiensis
(Hirayama et Ando)
Extinct Species		 Scapharca broughtonii (Schrenck） Solen (Ensisolen) krusensterni Schrenck Clinocardium (Fuscocardium) braunsi (Tokunaga)
Extinct Species		 Clinocardium buellowi (Rolle)
IB019 IB020 IB021 IB023 IB025 IB026
Mercenaria stimpsoni (Gould) Mactra chinensis chinensis Philippi Notochione jedoensis (Lischke) Macoma tokyoensis Makiyama Notochione jedoensis (Lischke) Lucinoma annulata (Reeve)
IB027 IB030 IB031 IB032 IB033 IB041
Patinopecten (Mizuhopecten)
tokyoensis Tokunaga
Extinct Species		 Pecten (Notovola) albicans (Schroter) Chlamys farreri farreri (Jones et Preston) Anomia chinensis Philippi Ostrea denselamellosa denselamellosa Lischke Solen strictus Gould
IB003 IB014 IB028 IB046 IB047 IB044
Mya (Arenomya) arenaria oonogai Makiyama Decatopecten striatus (Schumacher) Macoma Kiorosiensis 1980 Tanji Anomia chinensis Philippi Monia macroschisma (Deshayes) Ostrea denselamellosa denselamellosa Lischke
IB049 IB050 IB051 IB052 IB053 IB054
Reserved Reserved Reserved Reserved
Ostrea denselamellosa denselamellosa Lischke Chlamys farreri farreri (Jones et Preston)
IB059 IB061
** GASTROPODA & SCAPHOPODA **
Rapana venosa venosa (Valenciennes) Rapana venosa venosa (Valenciennes) Siphonalia cassidariaeformis (Reeve) Tonna luteostoma (Kuster) Babylonia japonica (Reeve) Glassaulax didyma (Roding)
IB004 IB005 IB006 IB009 IB011 IB010
Neptunea arthritica (Bernardi) Inquisitor jeffreysi (Smith) Pristiterebra tsuboiana (Hinds) Reticunassa japonica (A. Adams) Unidentified Sulcerato callosa (Adams et Reeve)
IB029 IB016 IB024 IB034 IB035 IB037
Ringicula (Ringiculella) doliaris Gould Umbonium (Suchium) moniliferum (Lamarck) A part of Glassaulax didyma (Roding) Dentalium (Paradentalium) octangulatum Donovan A part of Fusinus perplexus ferrugineus Kuroda et Habe Umbonium (Suchium) costatum (Kiener)
IB038 IB040 IB048 IB017 IB057 IB058
** OTHERS **
Temnopleurus hardwicki (Gray) Scaphechinus mirabilis A. Agassiz Spine of a sea urchin Balanus rostratus Hoek Neocallichirus grandis Karasawa and Goda A part of Scaphechinus mirabilis A. Agassiz
IB022 IB045 IB039 IB015 IB036 IB042
Reserved Reserved Reserved Reserved
Scaphechinus mirabilis A. Agassiz Temnopleurus hardwicki (Gray)
IB060 IB062
Comparing of fossil and current one
Patinopecten (Mizuhopecten) tokyoensis Tokunaga Extinct Species
Rapana venosa venosa (Valenciennes)