PBDB Collection

Longing Gap Radiolarians, K 65 (Cretaceous of Antarctica)

Where: Antarctica (64.5° S, 59.0° W: paleocoordinates 54.9° S, 37.6° W)

• coordinate based on unpublished field data

• hand sample-level geographic resolution

When: Ameghino Member (Ameghino Formation), Early/Lower Berriasian (145.0 - 140.2 Ma)

• bed-level stratigraphic resolution

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

• Anoxic conditions prevailed especially in the Longing Member; this is indicated by the often lacking bioturbation and rare horizons with benthonic fossils. In the Ameghino Member moderately intense bioturbation (Zoophycos, Chondrites, Planolites) and a consequent destruction of lamination indicate dysaerobic conditions. Doyle and Whitham (1991) attribute this environmental change to an uplift of the depositional environment above a permanent pyknocline. The submarine relief was very low and a simple hemipelagic sedimentation was dominant.

• Mudstone concretion with tuff layers

Size class: microfossils

Preservation: concretion

Collection methods: bulk, chemical, hydrochloric, sieve,

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

Primary reference: W. Kiessling. 1999. Late Jurassic radiolarians from the Antarctic Peninsula. Micropaleontology 45(S1):1-96 [W. Kiessling/W. Kiessling]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 46970: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 27.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Protozoa
Actinommacea - Xiphostylidae	Archaeocenosphaera gregaria, Archaeocenosphaera ruesti Archaeocenosphaera gregaria Rüst 1885 radiolarian Author = Rüst Archaeocenosphaera ruesti Pessagno et al. 1989 radiolarian Author = Pessagno and Yang
Nassellaria - Eucyrtiidae	Tetracapsa aff. cometa Tetracapsa aff. cometa radiolarian Author = (Pantanelli)
Nassellaria - Eucyrtidiidae	Stichomitra "sp. B", Stichomitra "sp. C", Pseudoeucyrtis "sp. A", Pseudoeucyrtis "sp. B", Pseudoeucyrtis "sp. C" Stichomitra "sp. B" Cayeux 1897 radiolarian Stichomitra "sp. C" Cayeux 1897 radiolarian Pseudoeucyrtis "sp. A" Pessagno 1977 radiolarian Pseudoeucyrtis "sp. B" Pessagno 1977 radiolarian Pseudoeucyrtis "sp. C" Pessagno 1977 radiolarian
Nassellaria - Spongocapsulidae	? Spongocapsula "sp. C", Obesacapsula "sp. A" ? Spongocapsula "sp. C" Pessagno 1977 radiolarian Obesacapsula "sp. A" Pessagno 1977 radiolarian
Nassellaria - Parvicingulidae	Tethysetta "boesii", ? Parvicingula "sp. B", Parvicingula aff. colemani, Parvicingula cf. elegans, Parvicingula turrita, Parvicingula jonesi, Parvicingula aff. thomesensis, ? Praeparvicingula erecta, Praeparvicingula "sp. B", Praeparvicingula aff. holdsworthi, Praeparvicingula "rotunda", Praeparvicingula aff. rotunda, "Praecaneta "discors"" = Praeparvicingula discors, ? Ristola "sp. A" Tethysetta "boesii" Parona 1890 radiolarian Author = (Parona) ? Parvicingula "sp. B" Pessagno 1977 radiolarian Parvicingula aff. colemani Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula cf. elegans Pessagno and Whalen 1982 radiolarian Author = Pessagno and Whalen Parvicingula turrita Rüst 1898 radiolarian Author = (Rüst) Parvicingula jonesi Pessagno 1977 radiolarian Author = Pessagno Parvicingula aff. thomesensis Pessagno 1977 radiolarian Author = Pessagno ? Praeparvicingula erecta radiolarian Author = (Tan Sin Hok) Praeparvicingula "sp. B" Pessagno et al. 1993 radiolarian Praeparvicingula aff. holdsworthi Yang 1993 radiolarian Author = Pessagno, Blome and Hull Praeparvicingula "rotunda" Hull 1995 radiolarian Author = Hull Praeparvicingula aff. rotunda Hull 1995 radiolarian Author = Hull "Praecaneta "discors"" = Praeparvicingula discors Yang 1993 radiolarian Author = (Yang) ? Ristola "sp. A" Pessagno and Whalen 1982 radiolarian
Nassellaria - Williriedellidae	Williriedellum ruesti, ? Tricolocapsa "sp. A" Williriedellum ruesti Tan Sin Hok 1927 radiolarian Author = (Tan Sin Hok) ? Tricolocapsa "sp. A" Haeckel 1881 radiolarian
Nassellaria - Archaeodictyomitridae	Archaeodictyomitra aff. exigua, Mita weddellensis Archaeodictyomitra aff. exigua Blome 1984 radiolarian Author = Blome Mita weddellensis Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Nassellaria - Hsuidae	Hsuum mclaughlini Hsuum mclaughlini Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome
Nassellaria - Bagotidae	? Canutus "sp. B", Droltus aff. laseekensis ? Canutus "sp. B" Pessagno and Whalen 1982 radiolarian Droltus aff. laseekensis Pessagno and Whalen 1982 radiolarian Author = Pessagno and Whalen
Nassellaria - Artostrobiidae	Theocampe "sp. A" Theocampe "sp. A" Haeckel 1887 radiolarian
Nassellaria - Ultranaporidae	Napora pualensis, Napora irregularis Napora pualensis Blome 1984 radiolarian Author = (Blome) Napora irregularis Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Nassellaria -	? Windalia "sp. A" ? Windalia "sp. A" Ellis 1993 radiolarian
Spumellaria - Pantanelliidae	Pantanellium whalenae Pantanellium whalenae Pessagno and MacLeod 1987 radiolarian Author = Pessagno and MacLeod
Spumellaria -	Plegmosphaera "sp. D" Plegmosphaera "sp. D" radiolarian
Spumellaria - Praeconocaryommidae	Praeconocaryomma mammillaria Praeconocaryomma mammillaria radiolarian Author = (Rüst)
Spumellaria - Orbiculiformidae	Spongostaurus "sp. A" Spongostaurus "sp. A" Haeckel 1882 radiolarian