PBDB Collection

Longing Gap Radiolarians, K 12 (Jurassic of Antarctica)

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

• coordinate based on unpublished field data

• 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, 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 46960: 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
Spumellaria - Spongodiscidae	Teichertus hypnoticus, Spongodiscus "sp. A", Spongotripus pujanai Teichertus hypnoticus Kiessling 1999 radiolarian Author = Kiessling, n.sp. Spongodiscus "sp. A" Ehrenberg 1854 radiolarian Spongotripus pujanai Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Spumellaria - Orbiculiformidae	Spongostaurus australis, ? Orbiculiforma "sp. C", Orbiculiforma "sp. D", Orbiculiforma cf. vacaensis, ? Orbiculiforma kanayamaensis Spongostaurus australis Kiessling 1999 radiolarian Author = Kiessling, n.sp. ? Orbiculiforma "sp. C" Pessagno 1973 radiolarian Orbiculiforma "sp. D" Pessagno 1973 radiolarian Orbiculiforma cf. vacaensis Pessagno 1973 radiolarian Author = Pessagno ? Orbiculiforma kanayamaensis Mizutani 1981 radiolarian Author = Mizutani
Spumellaria - Angulobracchiidae	Paronaella "sp. A", Paronaella aff. solanoensis, Paronaella multifera, Angulobracchia cf. biordinalis, ? Angulobracchia ex gr. portmanni Paronaella "sp. A" Pessagno 1971 radiolarian Paronaella aff. solanoensis Pessagno 1971 radiolarian Author = Pessagno Paronaella multifera Yang 1993 radiolarian Author = Yang Angulobracchia cf. biordinalis Ozvoldova 1984 radiolarian Author = Ozvoldova ? Angulobracchia ex gr. portmanni Baumgartner 1984 radiolarian Author = Baumgartner
Spumellaria -	Spongiomma "sp. B", Spongiomma "sp. D", Spongiomma "sp. E" Spongiomma "sp. B" Haeckel 1887 radiolarian Spongiomma "sp. D" Haeckel 1887 radiolarian Spongiomma "sp. E" Haeckel 1887 radiolarian
Spumellaria - Parvivaccidae	Acaeniotyle parva, Acastea diaphorogona Acaeniotyle parva Yang 1993 radiolarian Author = Yang Acastea diaphorogona Foreman 1973 radiolarian Author = (Foreman)
Spumellaria - Tritrabidae	Neoparonaella "delicata" Neoparonaella "delicata" Yang 1993 radiolarian Author = Yang
Spumellaria - Hagiastridae	Crucella mexicana, Crucella magna, Higumastra aff. spinosum, Higumastra scassoi, Higumastra devilsgapensis Crucella mexicana Yang 1993 radiolarian Author = Yang Crucella magna Blome 1984 radiolarian Author = (Blome) Higumastra aff. spinosum radiolarian Author = (Steiger) Higumastra scassoi Kiessling 1999 radiolarian Author = Kiessling, n.sp. Higumastra devilsgapensis Pessagno et al. 1993 radiolarian Author = Pessagno, Blome and Hull
Spumellaria -	Plegmosphaera "sp. A" Plegmosphaera "sp. A" radiolarian
Spumellaria - Praeconocaryommidae	Praeconocaryomma scatebra, Praeconocaryomma hexagona Praeconocaryomma scatebra Hull 1997 radiolarian Author = Hull Praeconocaryomma hexagona Rüst 1898 radiolarian Author = (Rüst)
Spumellaria - Emiluviidae	Emiluvia aff. hopsoni Emiluvia aff. hopsoni Pessagno 1977 radiolarian Author = Pessagno
Entactinaria - Eptingiidae	Perispyridium "ordinarium" Perispyridium "ordinarium" Pessagno 1977 radiolarian Author = (Pessagno)
Nassellaria - Unumidae	Protunuma japonicus Protunuma japonicus Matsuoka and Yao 1985 radiolarian Author = Matsuoka and Yao
Nassellaria - Archaeodictyomitridae	Archaeodictyomitra "sp. C" Archaeodictyomitra "sp. C" Pessagno 1977 radiolarian
Nassellaria - Hsuidae	Hsuum feliformis Hsuum feliformis Jud 1994 radiolarian Author = Jud
Nassellaria - Bagotidae	Droltus "sp. A" Droltus "sp. A" Pessagno and Whalen 1982 radiolarian
Nassellaria - Ultranaporidae	Napora aff. bukryi Napora aff. bukryi Pessagno 1977 radiolarian Author = Pessagno
Nassellaria - Williriedellidae	Zhamoidellum ventricosum Zhamoidellum ventricosum Dumitrica 1970 radiolarian Author = Dumitrica
Nassellaria - Parvicingulidae	Praeparvicingula "sp. B", Praeparvicingula holdsworthi, Praeparvicingula vera, Praeparvicingula blomei, Praeparvicingula "rotunda", Praeparvicingula aff. rotunda, "Parvicingula aff. grantensis" = Praeparvicingula grantensis, Parvicingula "sp. A", Parvicingula "sp. D", Parvicingula deadhorsensis, Parvicingula yehae, Parvicingula jonesi, Parvicingula judae, Parvicingula colemani, Parvicingula aff. colemani, Caneta "sp. A", Caneta hsui Praeparvicingula "sp. B" Pessagno et al. 1993 radiolarian Praeparvicingula holdsworthi Yang 1993 radiolarian Author = (Yang) Praeparvicingula vera Pessagno and Whalen 1982 radiolarian Author = (Pessagno and Whalen) Praeparvicingula blomei Yang 1993 radiolarian Author = (Yang) Praeparvicingula "rotunda" Hull 1995 radiolarian Author = Hull Praeparvicingula aff. rotunda Hull 1995 radiolarian Author = Hull "Parvicingula aff. grantensis" = Praeparvicingula grantensis Pessagno and Whalen 1982 radiolarian Author = (Pessagno and Whalen) Parvicingula "sp. A" Pessagno 1977 radiolarian Parvicingula "sp. D" Pessagno 1977 radiolarian Parvicingula deadhorsensis Pessagno et al. 1993 radiolarian Author = (Pessagno, Blome and Parvicingula yehae Yang 1993 radiolarian Author = Yang Parvicingula jonesi Pessagno 1977 radiolarian Author = Pessagno Parvicingula judae Kiessling 1999 radiolarian Author = Kiessling, n.sp. Parvicingula colemani Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula aff. colemani Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Caneta "sp. A" Pessagno et al. 1993 radiolarian Caneta hsui Pessagno 1977 radiolarian Author = (Pessagno)
Nassellaria - Tripedurnulidae	? Tridentocyrtis "sp. B", ? Tridentocyrtis ? groissi ? Tridentocyrtis "sp. B" Steiger and Steiger 1994 radiolarian ? Tridentocyrtis ? groissi Steiger and Steiger 1994 radiolarian Author = Steiger and Steiger
Nassellaria -	? Windalia "sp. C" ? Windalia "sp. C" Ellis 1993 radiolarian
Nassellaria - Eucyrtidiidae	Pseudoeucyrtis "sp. B" Pseudoeucyrtis "sp. B" Pessagno 1977 radiolarian
Nassellaria - Eucyrtiidae	Tetracapsa aff. cometa Tetracapsa aff. cometa radiolarian Author = (Pantanelli)
Actinommacea - Xiphostylidae	Triactoma paramexicana Triactoma paramexicana Pessagno and Yang 1989 radiolarian Author = Pessagno and Yang