Longing Gap Radiolarians, K 15 (Jurassic of Antarctica)

Where: Antarctic Peninsula, Antarctica (64.5° S, 59.0° W: paleocoordinates 55.0° S, 33.2° W)

• hand sample-level geographic resolution

When: Longing Member (Ameghino Formation), Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: basinal (); lithified, concretionary, black mudstone

• Anoxic conditions prevailed especially in the Longing Member; this is indicated by the often lacking bioturbation and rare horizons with benthonic fossils.
• Mudstone concretion with tuff layers

Size class: microfossils

Preservation: concretion, replaced with other

Collection methods: bulk, chemical, hydrochloric, sieve,

• Radiolarians only. Additional faunal elements are sponge spicules and very rare foraminifera.

Primary reference: W. Kiessling, R. Scasso, A. Zeiss, A. Riccardi, and F. Medina. 1999. Combined radiolarian-ammonite stratigraphy for the Late Jurassic of the Antarctic Peninsula: Implications for radiolarian stratigraphy. Geodiversitas 21(4):687-713 [W. Kiessling/W. Kiessling/W. Kiessling]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 51837: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 22.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
 Entactinaria - Eptingiidae
Perispyridium sp., Perispyridium ordinarium
Perispyridium sp. Dumitrica 1978 radiolarian
Perispyridium ordinarium Pessagno 1977 radiolarian
 Nassellaria - Parvicingulidae
Caneta hsui, Parvicingula jonesi
Caneta hsui Pessagno 1977 radiolarian
Parvicingula jonesi Pessagno 1977 radiolarian
 Spumellaria - Patulibracchiidae
Homoeoparonaella elegans
Homoeoparonaella elegans Pessagno 1977 radiolarian
 Spumellaria - Parvivaccidae
Acastea diaphorogona, Acaeniotyle umbilicata
Acastea diaphorogona Foreman 1973 radiolarian
Acaeniotyle umbilicata Rüst 1898 radiolarian