Longing Gap Radiolarians, K 33 (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• coordinate based on unpublished field data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: Longing Member (Ameghino Formation), Early/Lower 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 46967: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 27.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Protozoa
 Spumellaria - Emiluviidae
Emiluvia parvinodosa Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria -
Spongiomma "sp. B" Haeckel 1887 radiolarian
 Spumellaria - Spongodiscidae
Spongodiscus "sp. A" Ehrenberg 1854 radiolarian
 Spumellaria - Tritrabidae
Neoparonaella "delicata" Yang 1993 radiolarian
Author = Yang
 Spumellaria -
 Spumellaria - Hagiastridae
Crucella squama Kozlova 1971 radiolarian
Author = (Kozlova)
Crucella cf. espartoensis Pessagno 1971 radiolarian
Author = Pessagno
Crucella aff. espartoensis Pessagno 1971 radiolarian
Author = Pessagno
Crucella mexicana Yang 1993 radiolarian
Author = Yang
 Spumellaria - Praeconocaryommidae
? Praeconocaryomma "sp. G" Pessagno 1976 radiolarian
? Praeconocaryomma "sp. H" Pessagno 1976 radiolarian
 Spumellaria - Pantanelliidae
Pantanellium whalenae Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium formosum Yang 1993 radiolarian
Author = Pessagno
Pantanellium deflectum Yang 1993 radiolarian
Author = Yang
Pantanellium cantuchapai Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium ranchitoense Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium quintachillaense Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium meraceibaense Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium rarum Hull 1997 radiolarian
Author = Hull
Pantanellium aff. parvulum Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Gorgansium "sp. A" Pessagno and Blome 1980 radiolarian
Gorgansium steigeri Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Gorgansium aff. morganense Pessagno and Blome 1980 radiolarian
Author = Pessagno and Blome
Vallupus hopsoni Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
Vallupus japonicus Kawabata 1988 radiolarian
Author = Kawabata
 Spumellaria - Orbiculiformidae
? Orbiculiforma hullae Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria - Pseudoaulophacidae
? Alievium "sp. C" Pessagno 1972 radiolarian
 Spumellaria - Angulobracchiidae
Paronaella multifera Yang 1993 radiolarian
Author = Yang
 Radiolaria - Actinommidae
Actinomma interessanta Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Actinommacea - Xiphostylidae
Tripocyclia triacuminata radiolarian
Author = (Lipman)
Archaeocenosphaera gregaria Rüst 1885 radiolarian
Author = Rüst
Archaeocenosphaera cf. laseekensis Pessagno et al. 1989 radiolarian
Author = Pessagno and Yang
 Nassellaria - Parvicingulidae
Parvicingula aff. yehae Yang 1993 radiolarian
Author = Yang
Parvicingula excelsa Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
Parvicingula deadhorsensis Pessagno et al. 1993 radiolarian
Author = (Pessagno, Blome and
Parvicingula colemani Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
Parvicingula cf. elegans Pessagno and Whalen 1982 radiolarian
Author = Pessagno and Whalen
Parvicingula cf. thomesensis Pessagno 1977 radiolarian
Author = Pessagno
Praeparvicingula "sp. B" 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 "rotunda" Hull 1995 radiolarian
Author = Hull
Praeparvicingula aff. rotunda Hull 1995 radiolarian
Author = Hull
 Nassellaria - Spongocapsulidae
Obesacapsula "sp. A" Pessagno 1977 radiolarian
 Nassellaria -
? Windalia "sp. A" Ellis 1993 radiolarian
? Windalia "sp. C" Ellis 1993 radiolarian
 Nassellaria - Archaeodictyomitridae
? Archaeodictyomitra sixi Yang 1993 radiolarian
Author = Yang
 Nassellaria - Ultranaporidae
Napora pualensis Blome 1984 radiolarian
Author = (Blome)
Napora durhami Pessagno 1977 radiolarian
Author = (Pessagno)
 Nassellaria - Sethocapsidae
Arcanicapsa aff. adrianae Jud 1994 radiolarian
Author = (Jud)
 Nassellaria - Eucyrtiidae
Tetracapsa molengraaffi Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
Tetracapsa horokanaiensis Kawabata 1988 radiolarian
Author = (Kawabata)
 Nassellaria - Eucyrtidiidae
Stichomitra "sp. C" Cayeux 1897 radiolarian
Stichomitra cf. pseudacerra Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
 Nassellaria - Williriedellidae
Williriedellum frequens Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
Zhamoidellum boehmi Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Entactinaria - Hexastylidae
? Hexastylus "sp. C" Haeckel 1881 radiolarian
 Entactinaria - Saturnalidae
Acanthocircus "sp. B" Squinabol 1903 radiolarian
Acanthocircus "yaoi" Yang 1993 radiolarian
Author = Yang