JAMSTEC Hole 902-C9001C, P. depressum Zone (Pleistocene of Japan)

Where: Japan (41.2° N, 142.2° E: paleocoordinates 41.2° N, 142.2° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Pterocanium depressum nannofossil zone, Middle Pleistocene (0.8 - 0.1 Ma)

• "The core provided a continuous record from marine isotope stage (MIS) 18 (750 ka) to the present, a period that spanned the Brunhes normal polarity epoch (0–740 ka). The age model of this core was established through measurement of the stable oxygen isotopes of benthic foraminifera and calcareous nannofossil datums (Domitsu et al. 2011)." (Matsuzaki et al. 2014)

•"The stratigraphical interval between sample 18H-4 at 42–48 cm (163.04 mbsf) and 13H-6 at 40.5–49.5 cm (118 mbsf) in the 902-C9001C core. This zone covers the period from 238 to 209 ka." (Matsuzaki et al. 2014)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: microfossils

Collection methods: Repository: Department of Geology and Paleontology, Tohoku University Graduate School of Science, Sendai, Japan

Primary reference: K. M. Matsuzaki, N. Suzuki, H. Nishi, R. Takashima, Y. Kawate and T. Sakaii. 2014. Middle to Late Pleistocene radiolarian biostratigraphy in the water-mixed region of the Kuroshio and Oyashio currents, northeastern margin of Japan (JAMSTEC Hole 902-C9001C). Journal of Micropalaeontology 33:205-222 [B. Allen/B. Allen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 233711: authorized by Bethany Allen, entered by Bethany Allen on 27.02.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

 Radiolaria -
Cyrtidosphaera reticulata Haeckel 1861 radiolarian
 Spumellaria - Spongodiscidae
Dictyocoryne profunda Ehrenberg 1873 radiolarian
Spongaster tetras Ehrenberg 1860 radiolarian
subsp. tetras, irregularis
Spongodiscus resurgens Ehrenberg 1854 radiolarian
"Dictyocoryne muelleri" = Euchitonia muelleri Haeckel 1862 radiolarian
"Amphirhopalum virchowii" = Euchitonia virchowii Haeckel 1862 radiolarian
 Spumellaria - Coccodiscidae
 Spumellaria -
Amphisphaera tanzhiyuani Matsuzaki and Suzuki 2014 radiolarian
Schizodiscus sp. Dogiel' and Reshetnyak 1952 radiolarian
Schizodiscus disymmetricus Dogiel' and Reshetnyak 1952 radiolarian
 Spumellaria - Stylosphaeridae
Spongosphaera streptacantha Haeckel 1861 radiolarian
 Spumellaria - Pyloniidae
Larcopyle buetschlii Dreyer 1889 radiolarian
Larcopyle cervicornis Haeckel 1887 radiolarian
Phorticium polycladum Tan and Tchang 1976 radiolarian
Phorticium pylonium Haeckel 1887 radiolarian
Tetrapyle ex gr. octacantha Müller 1859 radiolarian
 Spumellaria - Heliodiscidae
Heliodiscus cf. tunicatus O'Connor 1997 radiolarian
 Spumellaria -
"Spongodiscus helioides" = Trochodiscus helioides
"Spongodiscus helioides" = Trochodiscus helioides Cleve 1899 radiolarian
 Spumellaria - Litheliidae
Lithelius nautiloides Popofsky 1908 radiolarian
 Spumellaria - Sponguridae
Spongurus ? pylomaticus radiolarian
subsp. borealis
 Spumellaria - Larnacillidae
 Collodaria -
Siphonosphaera paraphoros Matsuzaki and Suzuki 2014 radiolarian
 Radiolaria - Actinommidae
Actinomma boreale Cleve 1899 radiolarian
Actinomma leptodermum Jørgensen 1899 radiolarian
Sphaeropyle langii Dreyer 1889 radiolarian
 Radiolaria - Ommatodiscidae
"Stylochlamydium ? venustum" = Perichlamydium venustum, Flustrella polygonia
"Stylochlamydium ? venustum" = Perichlamydium venustum Bailey 1856 radiolarian
 Entactinaria - Rhizosphaeridae
Rhizosphaera mediana Nigrini 1967 radiolarian
 Entactinaria - Hexalonchidae
 Nassellaria - Ultranaporidae
Lychnocanoma sakaii Morley and Nigrini 1995 radiolarian
Pterocanium praetextum radiolarian
subsp. praetextum
 Nassellaria - Lophophaenidae
"Ceratocyrtis spinosiretis" = Lampromitra spinosiretis Takahashi 1991 radiolarian
 Nassellaria - Eucyrtiidae
Gondwanaria dogieli, "Pterocanium depressum" = Lychnocanium depressum
"Pterocanium depressum" = Lychnocanium depressum Ehrenberg 1873 radiolarian
 Nassellaria - Eucyrtidiidae
 Nassellaria - Plagiacanthidae
 Nassellaria - Acanthodesmiidae
Zygocircus cf. piscicaudatus Popofsky 1913 radiolarian
 Nassellaria - Theopiliidae
Cycladophora davisiana Ehrenberg 1873 radiolarian
Eucecryphalus cevus radiolarian
 Nassellaria - Pterocorythidae
Pterocorys clausus radiolarian
 Nassellaria - Triospyrididae
Ceratospyris ? borealis Bailey 1856 radiolarian
 Nassellaria - Cannobotryidae
Botryocampe inflatum Bailey 1856 radiolarian
 Nassellaria - Artostrobiidae
"Botryostrobus aquilonaris" = Artostobium, "Botryostrobus seriatus" = Artostobium
"Botryostrobus aquilonaris" = Artostobium radiolarian
"Botryostrobus seriatus" = Artostobium radiolarian