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• coordinate based on unpublished field data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

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