Longing Gap Radiolarians, K 25 (Jurassic of Antarctica)

Where: Antarctica (64.5° S, 59.0° W: paleocoordinates 54.9° S, 35.5° W)

• coordinate based on unpublished field data

• small collection-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 46964: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 27.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Protozoa
 Radiolaria -
Spumellaria indet. Ehrenberg 1875 radiolarian
 Spumellaria - Emiluviidae
Emiluvia lowercoonensis Pessagno et al. 1993 radiolarian
ssp. polaris, Author = Kiessling, n.ssp.
? Emiluvia aff. pessagnoi Foreman 1973 radiolarian
Author = Foreman
Emiluvia parvinodosa n. sp. Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Emiluvia aff. parvinodosa Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria -
Spongiomma "sp. B" Haeckel 1887 radiolarian
Spongiomma "sp. D" Haeckel 1887 radiolarian
Spongiomma "sp. F" Haeckel 1887 radiolarian
 Spumellaria - Spongodiscidae
Spongotripus pujanai Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Spongodiscus "sp. A" Ehrenberg 1854 radiolarian
Spongodiscus "sp. B" Ehrenberg 1854 radiolarian
 Spumellaria - Sponguridae
? Patellula "sp. D" Kozlova 1972 radiolarian
 Spumellaria - Tritrabidae
Neoparonaella delicata Yang 1993 radiolarian
Author = Yang
Tritrabs exotica Pessagno 1977 radiolarian
Author = Pessagno
Tritrabs rhododactylus Baumgartner 1980 radiolarian
Author = Baumgartner
 Spumellaria - Orosphaeridae
Orosphaeridae indet. Haeckel 1887 radiolarian
 Spumellaria -
 Spumellaria - Hagiastridae
Crucella magna Blome 1984 radiolarian
Author = (Blome)
Crucella mexicana Yang 1993 radiolarian
Author = Yang
Higumastra scassoi n. sp. Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Higumastra devilsgapensis Pessagno et al. 1993 radiolarian
Author = Pessagno, Blome and Hull
 Spumellaria - Parvivaccidae
Praeconosphaera "sphaeroconus" Rüst 1898 radiolarian
Author = (Rüst)
Acastea diaphorogona Foreman 1973 radiolarian
Author = (Foreman)
Acaeniotyle sp. Foreman 1973 radiolarian
 Spumellaria - Praeconocaryommidae
Praeconocaryomma "sp. A" Pessagno 1976 radiolarian
Praeconocaryomma "sp. C" Pessagno 1976 radiolarian
? Praeconocaryomma "sp. D" Pessagno 1976 radiolarian
Praeconocaryomma "sp. F" Pessagno 1976 radiolarian
 Spumellaria - Pantanelliidae
Pantanellium "sp. A" Pessagno 1977 radiolarian
Pantanellium whalenae Pessagno and MacLeod 1987 radiolarian
Author = Pessagno and MacLeod
Pantanellium formosum Yang 1993 radiolarian
Author = Pessagno
Pantanellium aff. formosum 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
Pantanellium rarum Hull 1997 radiolarian
Author = Hull
 Spumellaria - Orbiculiformidae
"Orbiculiforma teres" = Orbiculiformella teres Hull 1997 radiolarian
Author = Hull
Spongostaurus australis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Orbiculiforma "sp. A" Pessagno 1973 radiolarian
Orbiculiforma "sp. B" Pessagno 1973 radiolarian
? Orbiculiforma "sp. C" Pessagno 1973 radiolarian
Orbiculiforma cf. vacaensis Pessagno 1973 radiolarian
Author = Pessagno
Orbiculiforma mclaughlini Pessagno 1977 radiolarian
Author = Pessagno
Orbiculiforma lowreyensis Pessagno 1977 radiolarian
Author = Pessagno
? Orbiculiforma hullae Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Spumellaria - Pseudoaulophacidae
? Alievium "sp. C" Pessagno 1972 radiolarian
 Spumellaria - Angulobracchiidae
Angulobracchia digitata Baumgartner 1980 radiolarian
Author = Baumgartner
Protopsium posinos De Wever 1981 radiolarian
Author = De Wever
Paronaella "sp. A" Pessagno 1971 radiolarian
Paronaella aff. multifera Yang 1993 radiolarian
Author = Yang
Paronaella denudata Rüst 1898 radiolarian
Author = (Rüst)
Paronaella cf. pristidentata Baumgartner 1980 radiolarian
Author = Baumgartner
Paronaella aff. pristidentata Baumgartner 1980 radiolarian
Author = Baumgartner
Paronaella cf. solanoensis Pessagno 1971 radiolarian
Author = Pessagno
Paronaella aff. venusta Blome 1984 radiolarian
Author = Blome
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
Archaeospongoprunum aff. helense Blome 1984 radiolarian
Author = Blome
 Spumellaria - Patulibracchiidae
Homoeoparonaella elegans Pessagno 1977 radiolarian
s.s., Author = (Pessagno) and ssp. yangi, Author = Kiessling, n.ssp.
 Radiolaria - Actinommidae
Actinomma "sp. A" Haeckel 1862 radiolarian
Actinomma "sp. B" Haeckel 1862 radiolarian
Actinomma "sp. C" Haeckel 1862 radiolarian
Actinomma frigida n. sp. 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 crassa Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Nassellaria - Parvicingulidae
Caneta "sp. A" Pessagno et al. 1993 radiolarian
Caneta hsui Pessagno 1977 radiolarian
Author = (Pessagno)
Parvicingula "sp. A" Pessagno 1977 radiolarian
? Parvicingula "sp. B" Pessagno 1977 radiolarian
Parvicingula yehae Yang 1993 radiolarian
Author = Yang
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 aff. colemani Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
Parvicingula cf. elegans Pessagno and Whalen 1982 radiolarian
Author = Pessagno and Whalen
Parvicingula cf. blowi Pessagno 1977 radiolarian
Author = Pessagno
Parvicingula judae Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Parvicingula turrita Rüst 1898 radiolarian
Author = (Rüst)
Parvicingula aff. turrita Rüst 1898 radiolarian
Author = (Rüst)
Praeparvicingula "sp. A" Pessagno et al. 1993 radiolarian
Praeparvicingula "sp. B" Pessagno et al. 1993 radiolarian
? Praeparvicingula "sp. E" Pessagno et al. 1993 radiolarian
Praeparvicingula "communis" Blome 1984 radiolarian
Author = (Blome)
Praeparvicingula blomei Yang 1993 radiolarian
Author = (Yang)
"Praecaneta "discors"" = Praeparvicingula discors Yang 1993 radiolarian
Author = (Yang)
Praeparvicingula nebulosa Hull 1995 radiolarian
Author = Hull
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
"Parvicingula aff. grantensis" = Praeparvicingula grantensis Pessagno and Whalen 1982 radiolarian
Author = (Pessagno and Whalen)
 Nassellaria -
? Windalia "sp. C" Ellis 1993 radiolarian
? Windalia "sp. D" Ellis 1993 radiolarian
? Windalia "sp. E" Ellis 1993 radiolarian
 Nassellaria - Archaeodictyomitridae
? Archaeodictyomitra sixi Yang 1993 radiolarian
Author = Yang
Archaeodictyomitra shengi Yang 1993 radiolarian
Author = Yang
Archaeodictyomitra exigua Blome 1984 radiolarian
Author = Blome
Mita weddellensis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Nassellaria - Hsuidae
Hsuum mclaughlini Pessagno and Blome 1984 radiolarian
Author = Pessagno and Blome
 Nassellaria - Bagotidae
Droltus "sp. B" Pessagno and Whalen 1982 radiolarian
 Nassellaria - Ultranaporidae
Napora pacifica Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Napora pualensis Blome 1984 radiolarian
Author = (Blome)
Napora aff. pyramidalis Baumgartner 1984 radiolarian
Author = Baumgartner
Napora durhami Pessagno 1977 radiolarian
Author = (Pessagno)
Napora irregularis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Nassellaria - Eucyrtiidae
Tetracapsa molengraaffi Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
 Nassellaria - Pseudodictyomitridae
Loopus primitivus Matsuoka and Yao 1985 radiolarian
Author = (Matsuoka and Yao)
 Nassellaria - Eucyrtidiidae
Stichomitra "sp. A" Cayeux 1897 radiolarian
Stichomitra "sp. B" Cayeux 1897 radiolarian
Stichomitra "sp. C" Cayeux 1897 radiolarian
Stichomitra "sp. D" Cayeux 1897 radiolarian
Stichomitra cf. pseudacerra Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
Pseudoeucyrtis "sp. B" Pessagno 1977 radiolarian
Pseudoeucyrtis aff. paskentaensis Pessagno 1977 radiolarian
Author = Pessagno
 Nassellaria - Williriedellidae
Williriedellum frequens Tan Sin Hok 1927 radiolarian
Author = (Tan Sin Hok)
Zhamoidellum "sp. A" Dumitrica 1970 radiolarian
 Nassellaria - Tripedurnulidae
? Tridentocyrtis "sp. A" Steiger and Steiger 1994 radiolarian
 Entactinaria - Hexalonchidae
? Hexalonche "sp. A" Haeckel 1881 radiolarian
 Entactinaria - Hexastylidae
? Hexastylus "sp. C" Haeckel 1881 radiolarian
? Hexastylus grahamensis Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
 Entactinaria - Eptingiidae
Perispyridium serratum Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Perispyridium trifolium Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Perispyridium "ordinarium" Pessagno 1977 radiolarian
Author = (Pessagno)
 Entactinaria - Centrocubidae
? Octodendron "sp. B" Haeckel 1887 radiolarian
 Entactinaria - Saturnalidae
Acanthocircus euganeus Squinabol 1914 radiolarian
Author = (Squinabol)
Acanthocircus yaoi Yang 1993 radiolarian
Author = Yang
Acanthocircus dumitricai Kiessling 1999 radiolarian
Author = Kiessling, n.sp.
Acanthocircus cf. minimus Squinabol 1914 radiolarian
Author = (Squinabol)