Longing Gap Radiolarians, K 27 (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• coordinate based on unpublished field data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 46965: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 27.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Protozoa
 Spumellaria - Emiluviidae
Emiluvia lowercoonensis Pessagno et al. 1993 radiolarian
ssp. polaris, Author = Kiessling, n.ssp.
Emiluvia parvinodosa Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria - Pyramispongiidae
? Pyramispongia "sp. A" Pessagno 1973 radiolarian
 Spumellaria - Spongodiscidae
Spongotripus aff. pujanai Kiessling 1999 radiolarian
Stylospongia aff. polygonata radiolarian
Author = (Campbell and Clark)
Spongodiscus "sp. A" Ehrenberg 1854 radiolarian
Teichertus hypnoticus Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria - Tritrabidae
Neoparonaella delicata Yang 1993 radiolarian
Author = Yang
 Spumellaria - Orosphaeridae
Orosphaeridae indet. Haeckel 1887 radiolarian
 Spumellaria -
 Spumellaria - Hagiastridae
Crucella mexicana Yang 1993 radiolarian
Author = Yang
Higumastra scassoi Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Higumastra devilsgapensis Pessagno et al. 1993 radiolarian
Author = Pessagno, Blome and Hull
 Spumellaria - Praeconocaryommidae
Praeconocaryomma "sp. A" Pessagno 1976 radiolarian
Praeconocaryomma "sp. C" Pessagno 1976 radiolarian
Praeconocaryomma "sp. F" 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 quintachillaense Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium meraceibaense Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Gorgansium steigeri Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Bivallupus primigenius Yang and Pessagno 1989 radiolarian
Author = Yang and Pessagno
Neovallupus modestus Yang and Pessagno 1989 radiolarian
Author = Yang and Pessagno
Vallupus hopsoni Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
 Spumellaria - Orbiculiformidae
Spongostaurus australis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
? Orbiculiforma "sp. C" Pessagno 1973 radiolarian
? Orbiculiforma hullae Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria -
Pseudoacanthosphaera "sp. B" O'Dogherty 1994 radiolarian
 Spumellaria - Angulobracchiidae
Paronaella coalescenda Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Paronaella obesa Pessagno 1977 radiolarian
Author = (Pessagno)
 Spumellaria - Archaeospongoprunidae
Archaeospongoprunum aff. bipartitum Pessagno 1973 radiolarian
Author = Pessagno
 Spumellaria - Patulibracchiidae
Homoeoparonaella elegans Pessagno 1977 radiolarian
ssp. yangi, Author = Kiessling, n.ssp.
? Halesium "sp. C" Pessagno 1971 radiolarian
 Radiolaria - Actinommidae
Actinomma interessanta Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Actinomma frigida Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Actinomma longinggapensis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Actinomma verwirra Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Actinommacea - Xiphostylidae
Tripocyclia triacuminata radiolarian
Author = (Lipman)
Tripocyclia crassa Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Suna echiodes Foreman 1973 radiolarian
ssp. concava, Author = Kiessling, n.ssp.
Triactoma hidalgoensis Pessagno et al. 1989 radiolarian
Author = Pessagno and Yang
Archaeocenosphaera ruesti Pessagno et al. 1989 radiolarian
Author = Pessagno and Yang
 Nassellaria - Syringocapsidae
Podobursa triacantha Fischli 1916 radiolarian
ssp. polyacantha, Author = (Fischli)
Podobursa aff. tricola Foreman 1973 radiolarian
Author = Foreman
 Nassellaria - Parvicingulidae
Caneta hsui Pessagno 1977 radiolarian
Author = (Pessagno)
Tethysetta "boesii" Parona 1890 radiolarian
Author = (Parona)
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 cf. elegans Pessagno and Whalen 1982 radiolarian
Author = Pessagno and Whalen
Parvicingula judae n. sp. Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Parvicingula cf. thomesensis Pessagno 1977 radiolarian
Author = Pessagno
Parvicingula turrita Rüst 1898 radiolarian
Author = (Rüst)
? Praeparvicingula proiecta Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Praeparvicingula vera Pessagno and Whalen 1982 radiolarian
Author = (Pessagno and Whalen)
Praeparvicingula holdsworthi Yang 1993 radiolarian
Author = (Yang)
Praeparvicingula "rotunda" Hull 1995 radiolarian
Author = Hull
Praeparvicingula aff. rotunda Hull 1995 radiolarian
Author = Hull
 Nassellaria -
? Windalia "sp. C" Ellis 1993 radiolarian
? Windalia "sp. E" Ellis 1993 radiolarian
 Nassellaria - Archaeodictyomitridae
Archaeodictyomitra "sp. C" Pessagno 1977 radiolarian
Mita "sp. A" Pessagno 1977 radiolarian
Mita weddellensis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Nassellaria - Hsuidae
Hsuum mclaughlini Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
Hsuum tamanense Yang 1993 radiolarian
Author = Yang
 Nassellaria - Ultranaporidae
Napora pualensis Blome 1984 radiolarian
Author = (Blome)
 Nassellaria - Eucyrtiidae
Tetracapsa molengraaffi Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
Tetracapsa horokanaiensis Kawabata 1988 radiolarian
Author = (Kawabata)
 Nassellaria - Pseudodictyomitridae
Loopus primitivus Matsuoka and Yao 1985 radiolarian
Author = (Matsuoka and Yao)
 Nassellaria - Eucyrtidiidae
Stichomitra "sp. C" Cayeux 1897 radiolarian
Stichomitra "sp. D" Cayeux 1897 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
 Entactinaria - Eptingiidae
Perispyridium serratum Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Perispyridium trifolium Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Entactinaria - Centrocubidae
? Octodendron "sp. B" Haeckel 1887 radiolarian
 Entactinaria - Saturnalidae
Acanthocircus yaoi Yang 1993 radiolarian
Author = Yang