Longing Gap Radiolarians, K 8-1 (Jurassic of Antarctica)

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

• 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, 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, replaced with other

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 9956: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 26.03.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

Protozoa
 Spumellaria - Emiluviidae
? Emiluvia "sp. A" Foreman 1973 radiolarian
? Emiluvia "sp. B" Foreman 1973 radiolarian
 Spumellaria - Spongodiscidae
Spongodiscus "sp. B" Ehrenberg 1854 radiolarian
Teichertus hypnoticus Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria - Tritrabidae
Neoparonaella delicata Yang 1993 radiolarian
Author = Yang
Tritrabs exotica Pessagno 1977 radiolarian
Author = Pessagno
 Spumellaria -
 Spumellaria - Hagiastridae
? Crucella "sp. A" Pessagno 1971 radiolarian
Crucella magna Blome 1984 radiolarian
Author = (Blome)
Crucella mexicana Yang 1993 radiolarian
Author = Yang
Higumastra aff. spinosum radiolarian
Author = (Steiger)
Higumastra scassoi Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Higumastra cf. inflata Baumgartner 1980 radiolarian
Author = Baumgartner
Higumastra devilsgapensis Pessagno et al. 1993 radiolarian
Author = Pessagno, Blome and Hull
 Spumellaria - Parvivaccidae
Acastea diaphorogona Foreman 1973 radiolarian
Author = (Foreman)
Acastea bipes Yang 1993 radiolarian
Author = Yang
Acastea minispinea Yang 1993 radiolarian
Author = Yang
Acaeniotyle sp. Foreman 1973 radiolarian
 Spumellaria - Praeconocaryommidae
Praeconocaryomma "sp. A" Pessagno 1976 radiolarian
Praeconocaryomma "sp. C" Pessagno 1976 radiolarian
? Praeconocaryomma matsuokai n. sp. Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Praeconocaryomma hexagona Rüst 1898 radiolarian
Author = (Rüst)
 Spumellaria - Pantanelliidae
Pantanellium oligoporum Vinassa de Regny 1899 radiolarian
Author = Vinassa de Regny
Pantanellium whalenae Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium formosum Yang 1993 radiolarian
Author = Pessagno
Pantanellium ranchitoense Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium quintachillaense Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium rarum Hull 1997 radiolarian
Author = Hull
Gorgansium steigeri Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Protovallupus "sp. A" Pessagno and MacLeod 1987 radiolarian
 Spumellaria - Orbiculiformidae
Orbiculiforma "sp. A" Pessagno 1973 radiolarian
? Orbiculiforma hullae Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria - Pseudoaulophacidae
Alievium "sp. B" Pessagno 1972 radiolarian
 Spumellaria - Angulobracchiidae
Paronaella aff. solanoensis Pessagno 1971 radiolarian
Author = Pessagno
Paronaella obesa Pessagno 1977 radiolarian
Author = (Pessagno)
 Radiolaria - Actinommidae
Actinomma "sp. A" Haeckel 1862 radiolarian
Actinomma verwirra n. sp. Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Actinommacea - Xiphostylidae
Tripocyclia triacuminata radiolarian
Author = (Lipman)
Tripocyclia crassa Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Triactoma mexicana Pessagno et al. 1989 radiolarian
Author = Pessagno and Yang
Archaeocenosphaera gregaria Rüst 1885 radiolarian
misspelled as Archaecenosphaera gregaria
 Nassellaria - Parvicingulidae
Caneta "sp. A" Pessagno et al. 1993 radiolarian
Caneta hsui Pessagno 1977 radiolarian
Author = (Pessagno)
Tethysetta boesii Parona 1890 radiolarian
Author = (Parona)
Parvicingula yehae Yang 1993 radiolarian
Author = Yang
Parvicingula excelsa Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
Parvicingula colemani Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
Parvicingula jonesi Pessagno 1977 radiolarian
Author = Pessagno
Praeparvicingula "sp. B" Pessagno et al. 1993 radiolarian
Praeparvicingula communis Blome 1984 radiolarian
Author = (Blome)
"Praecaneta discors" = Praeparvicingula discors Yang 1993 radiolarian
Author = (Yang)
Praeparvicingula rotunda Hull 1995 radiolarian
Author = Hull
Praeparvicingula aff. rotunda Hull 1995 radiolarian
Author = Hull
 Nassellaria -
? Windalia "sp. D" Ellis 1993 radiolarian
 Nassellaria - Archaeodictyomitridae
Archaeodictyomitra minoensis Mizutani 1981 radiolarian
Author = (Mizutani)
Archaeodictyomitra shengi Yang 1993 radiolarian
Author = Yang
Archaeodictyomitra exigua Blome 1984 radiolarian
Author = Blome
Mita "sp. A" Pessagno 1977 radiolarian
Mita weddellensis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Nassellaria - Hsuidae
Hsuum cf. cuestaense Pessagno 1977 radiolarian
Author = Pessagno
Hsuum tamanense Yang 1993 radiolarian
Author = Yang
 Nassellaria - Ultranaporidae
"Napora "sp. B"" = Napora, Napora aff. pyramidalis, Napora bukryi, Napora aff. bukryi, "? Jacus "sp. A"" = Napora
"Napora "sp. B"" = Napora Pessagno 1977 radiolarian
Napora aff. pyramidalis Baumgartner 1984 radiolarian
Author = Baumgartner
Napora bukryi Pessagno 1977 radiolarian
Author = Pessagno
Napora aff. bukryi Pessagno 1977 radiolarian
Author = Pessagno
"? Jacus "sp. A"" = Napora Pessagno 1977 radiolarian
 Nassellaria - Eucyrtiidae
Tetracapsa molengraaffi Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
Tetracapsa horokanaiensis Kawabata 1988 radiolarian
Author = (Kawabata)
 Nassellaria - Eucyrtidiidae
Stichomitra "sp. A" Cayeux 1897 radiolarian
Stichomitra "sp. B" Cayeux 1897 radiolarian
Stichomitra "sp. C" Cayeux 1897 radiolarian
? Solenotryma "sp. A" Foreman 1968 radiolarian
 Nassellaria - Williriedellidae
? Tricolocapsa "sp. A" Haeckel 1881 radiolarian
Williriedellum frequens Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
 Nassellaria - Poulpidae
Saitoum pagei Pessagno 1977 radiolarian
Author = Pessagno
 Entactinaria - Eptingiidae
Perispyridium serratum Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Perispyridium trifolium n. sp. Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Perispyridium ordinarium Pessagno 1977 radiolarian
Author = (Pessagno)
 Entactinaria - Saturnalidae
Acanthocircus simplex Squinabol 1914 radiolarian
Author = (Squinabol)
Acanthocircus yaoi Yang 1993 radiolarian
Author = Yang
Acanthocircus dumitricai Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Entactinaria - Quinquecapsulariidae
Quinquecapsularia cf. megasphaerica radiolarian
Author = Dumitrica & Baumgartner