PBDB Collection

Longing Gap Radiolarians, K 44 (Jurassic of Antarctica)

Where: Antarctica (64.5° S, 59.0° W: paleocoordinates 54.9° S, 35.5° W)

• coordinate based on unpublished field data

• hand sample-level geographic resolution

When: Ameghino Member (Ameghino Formation), Late/Upper Tithonian (150.8 - 145.0 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 46968: 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	Tripocyclia triacuminata, ? Tripocyclia "sp. A", Triactoma spinosa Tripocyclia triacuminata radiolarian Author = (Lipman) ? Tripocyclia "sp. A" Haeckel 1881 radiolarian Triactoma spinosa Pessagno et al. 1989 radiolarian Author = (Pessagno and Yang)
Nassellaria -	? Windalia "sp. A", ? Windalia "sp. C", ? Windalia "sp. D" ? Windalia "sp. A" Ellis 1993 radiolarian ? Windalia "sp. C" Ellis 1993 radiolarian ? Windalia "sp. D" Ellis 1993 radiolarian
Nassellaria - Hsuidae	Hsuum aff. tamanense Hsuum aff. tamanense Yang 1993 radiolarian Author = Pessagno and Blome
Nassellaria - Bagotidae	Canutus "sp. A" Canutus "sp. A" Pessagno and Whalen 1982 radiolarian
Nassellaria - Eucyrtiidae	Tetracapsa molengraaffi Tetracapsa molengraaffi Tan Sin Hok 1927 radiolarian Author = (Tan Sin Hok)
Nassellaria - Eucyrtidiidae	Stichomitra "sp. B", Pseudoeucyrtis "sp. A", Pseudoeucyrtis "sp. B", Stichocapsa singularis Stichomitra "sp. B" Cayeux 1897 radiolarian Pseudoeucyrtis "sp. A" Pessagno 1977 radiolarian Pseudoeucyrtis "sp. B" Pessagno 1977 radiolarian Stichocapsa singularis Tan Sin Hok 1927 radiolarian Author = Tan Sin Hok
Nassellaria - Parvicingulidae	Praeparvicingula "sp. B", ? Praeparvicingula "sp. E", "Parvicingula aff. grantensis" = Praeparvicingula grantensis, Praeparvicingula vera, Praeparvicingula holdsworthi, Praeparvicingula aff. rotunda, "Praecaneta discors" = Praeparvicingula discors, Darvelus cf. pessagnoi, Darvelus primus, ? Parvicingula "sp. B", Parvicingula colemani, Parvicingula aff. colemani, Parvicingula jonesi, Parvicingula excelsa, Parvicingula aff. excelsa, Parvicingula gracila, Tethysetta boesii Praeparvicingula "sp. B" Pessagno et al. 1993 radiolarian ? Praeparvicingula "sp. E" Pessagno et al. 1993 radiolarian "Parvicingula aff. grantensis" = Praeparvicingula grantensis Pessagno and Whalen 1982 radiolarian Author = (Pessagno and Whalen) Praeparvicingula vera Pessagno and Whalen 1982 radiolarian Author = (Pessagno and Whalen) Praeparvicingula holdsworthi Yang 1993 radiolarian Author = (Yang) Praeparvicingula aff. rotunda Hull 1995 radiolarian Author = Hull "Praecaneta discors" = Praeparvicingula discors Yang 1993 radiolarian Author = (Yang) Darvelus cf. pessagnoi Hull 1995 radiolarian Author = Hull Darvelus primus Hull 1995 radiolarian Author = Hull ? Parvicingula "sp. B" Pessagno 1977 radiolarian Parvicingula colemani Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula aff. colemani Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula jonesi Pessagno 1977 radiolarian Author = Pessagno Parvicingula excelsa Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula aff. excelsa Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula gracila Hull 1995 radiolarian Author = Hull Tethysetta boesii Parona 1890 radiolarian Author = (Parona)
Nassellaria - Spongocapsulidae	? Spongocapsula "sp. E" ? Spongocapsula "sp. E" Pessagno 1977 radiolarian
Nassellaria - Sethocapsidae	Arcanicapsa aff. adrianae Arcanicapsa aff. adrianae Jud 1994 radiolarian Author = (Jud)
Nassellaria - Acropyramididae	Cornutella "sp. A", Cornutella "sp. B" Cornutella "sp. A" Ehrenberg 1838 radiolarian Cornutella "sp. B" Ehrenberg 1838 radiolarian
Nassellaria - Williriedellidae	Williriedellum frequens, Zhamoidellum "sp. B", Zhamoidellum boehmi n. sp. Williriedellum frequens Tan Sin Hok 1927 radiolarian Author = (Tan Sin Hok) Zhamoidellum "sp. B" Dumitrica 1970 radiolarian Zhamoidellum boehmi n. sp. Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Nassellaria - Ultranaporidae	Napora "sp. A", Napora pacifica, Napora pualensis, Napora irregularis n. sp. Napora "sp. A" Pessagno 1977 radiolarian Napora pacifica Kiessling 1999 radiolarian Author = Kiessling, n.sp. Napora pualensis Blome 1984 radiolarian Author = (Blome) Napora irregularis n. sp. Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Entactinaria - Hexastylidae	? Hexastylus "sp. A", ? Hexastylus grahamensis ? Hexastylus "sp. A" Haeckel 1881 radiolarian ? Hexastylus grahamensis Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Entactinaria - Hexalonchidae	? Hexalonche "sp. A" ? Hexalonche "sp. A" Haeckel 1881 radiolarian
Entactinaria - Saturnalidae	Acanthocircus yaoi, Acanthocircus euganeus, Acanthocircus moctezumaensis Acanthocircus yaoi Yang 1993 radiolarian Author = Yang Acanthocircus euganeus Squinabol 1914 radiolarian Author = (Squinabol) Acanthocircus moctezumaensis Yang 1993 radiolarian Author = Yang
Spumellaria - Spongodiscidae	Spongodiscus "sp. A", Spongotripus pujanai Spongodiscus "sp. A" Ehrenberg 1854 radiolarian Spongotripus pujanai Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Spumellaria - Hagiastridae	Crucella magna Crucella magna Blome 1984 radiolarian Author = (Blome)
Spumellaria - Praeconocaryommidae	? Praeconocaryomma "sp. B" ? Praeconocaryomma "sp. B" Pessagno 1976 radiolarian
Spumellaria - Patulibracchiidae	Homoeoparonaella elegans Homoeoparonaella elegans Pessagno 1977 radiolarian ssp. yangi, Author = Kiessling, n.ssp.
Spumellaria - Orbiculiformidae	Spongostaurus australis, ? Orbiculiforma hullae Spongostaurus australis Kiessling 1999 radiolarian Author = Kiessling, n.sp. ? Orbiculiforma hullae Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Spumellaria - Pseudoaulophacidae	? Alievium "sp. C" ? Alievium "sp. C" Pessagno 1972 radiolarian
Spumellaria - Angulobracchiidae	Paronaella aff. venusta, Paronaella mulleri, Paronaella aff. pristidentata Paronaella aff. venusta Blome 1984 radiolarian Author = Blome Paronaella mulleri Pessagno 1977 radiolarian Author = Pessagno Paronaella aff. pristidentata Baumgartner 1980 radiolarian Author = Baumgartner
Spumellaria - Archaeospongoprunidae	? Archaeospongoprunum "sp. A", Archaeospongoprunum aff. helense ? Archaeospongoprunum "sp. A" Pessagno 1973 radiolarian Archaeospongoprunum aff. helense Blome 1984 radiolarian Author = Blome
Spumellaria - Emiluviidae	? Emiluvia aff. pessagnoi, Emiluvia parvinodosa, Emiluvia aff. parvinodosa ? Emiluvia aff. pessagnoi Foreman 1973 radiolarian Author = Foreman Emiluvia parvinodosa Kiessling 1999 radiolarian Author = Kiessling, n.sp. Emiluvia aff. parvinodosa Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Spumellaria -	Plegmosphaera "sp. A", Plegmosphaera "sp. D", Spongiomma "sp. E" Plegmosphaera "sp. A" radiolarian Plegmosphaera "sp. D" radiolarian Spongiomma "sp. E" Haeckel 1887 radiolarian
Spumellaria - Tritrabidae	Neoparonaella delicata Neoparonaella delicata Yang 1993 radiolarian Author = Yang
Spumellaria - Parvivaccidae	Acaeniotyle sp., Acaeniotyle parva, Praeconosphaera sphaeroconus Acaeniotyle sp. Foreman 1973 radiolarian Acaeniotyle parva Yang 1993 radiolarian Author = Yang Praeconosphaera sphaeroconus Rüst 1898 radiolarian Author = (Rüst)