PBDB Collection

James Ross Radiolarians, GD 14-1 (Jurassic of Antarctica)

Where: Antarctica (64.0° S, 58.2° W: paleocoordinates 54.4° S, 35.8° W)

• coordinate estimated from map

• 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 46972: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 27.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Protozoa
Spumellaria - Praeconocaryommidae	Praeconocaryomma mammillaria, Praeconocaryomma "sp. A", Praeconocaryomma "sp. E", ? Praeconocaryomma "sp. H" Praeconocaryomma mammillaria radiolarian Author = (Rüst) Praeconocaryomma "sp. A" Pessagno 1976 radiolarian Praeconocaryomma "sp. E" Pessagno 1976 radiolarian ? Praeconocaryomma "sp. H" Pessagno 1976 radiolarian
Spumellaria - Stylosphaeridae	Staurolonche "sp. A" Staurolonche "sp. A" Haeckel 1881 radiolarian
Spumellaria - Hagiastridae	Crucella magna, Crucella mexicana Crucella magna Blome 1984 radiolarian Author = (Blome) Crucella mexicana Yang 1993 radiolarian Author = Yang
Spumellaria - Pantanelliidae	Gorgansium "sp. B", Pantanellium formosum, Pantanellium rarum, Pantanellium cantuchapai, Pantanellium whalenae, Vallupus hopsoni Gorgansium "sp. B" Pessagno and Blome 1980 radiolarian Pantanellium formosum Yang 1993 radiolarian Author = Pessagno Pantanellium rarum Hull 1997 radiolarian Author = Hull Pantanellium cantuchapai Pessagno and MacLeod 1987 radiolarian Author = Pessagno and MacLeod Pantanellium whalenae Pessagno and MacLeod 1987 radiolarian Author = Pessagno and MacLeod Vallupus hopsoni Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome
Spumellaria - Tritrabidae	Neoparonaella "delicata" Neoparonaella "delicata" Yang 1993 radiolarian Author = Yang
Spumellaria - Angulobracchiidae	Paronaella venusta, Paronaella mulleri, Paronaella coalescenda, Angulobracchia digitata Paronaella venusta Blome 1984 radiolarian Author = Blome Paronaella mulleri Pessagno 1977 radiolarian Author = Pessagno Paronaella coalescenda Kiessling 1999 radiolarian Author = Kiessling, n.sp. Angulobracchia digitata Baumgartner 1980 radiolarian Author = Baumgartner
Spumellaria - Parvivaccidae	Parvivacca "sp. A", Acaeniotyle parva, Praeconosphaera "sphaeroconus" Parvivacca "sp. A" Pessagno et al. 1989 radiolarian Acaeniotyle parva Yang 1993 radiolarian Author = Yang Praeconosphaera "sphaeroconus" Rüst 1898 radiolarian Author = (Rüst)
Spumellaria - Orbiculiformidae	Orbiculiforma cf. iniqua, ? Orbiculiforma kanayamaensis, Orbiculiforma "mclaughlini", Spongostaurus australis Orbiculiforma cf. iniqua Blome 1984 radiolarian Author = Blome ? Orbiculiforma kanayamaensis Mizutani 1981 radiolarian Author = Mizutani Orbiculiforma "mclaughlini" Pessagno 1977 radiolarian Author = Pessagno Spongostaurus australis Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Spumellaria - Emiluviidae	Emiluvia parvinodosa, Emiluvia aff. parvinodosa Emiluvia parvinodosa Kiessling 1999 radiolarian Author = Kiessling, n.sp. Emiluvia aff. parvinodosa Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Radiolaria - Actinommidae	Actinomma frigida Actinomma frigida Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Entactinaria - Eptingiidae	Perispyridium serratum, Perispyridium trifolium Perispyridium serratum Kiessling 1999 radiolarian Author = Kiessling, n.sp. Perispyridium trifolium Kiessling 1999 radiolarian Author = Kiessling, n.sp.
Entactinaria - Saturnalidae	Acanthocircus "yaoi", Acanthocircus italicus Acanthocircus "yaoi" Yang 1993 radiolarian Author = Yang Acanthocircus italicus Squinabol 1914 radiolarian Author = (Squinabol)
Actinommacea - Xiphostylidae	Tripocyclia crassa, Triactoma spinosa Tripocyclia crassa Kiessling 1999 radiolarian Author = Kiessling, n.sp. Triactoma spinosa Pessagno et al. 1989 radiolarian Author = (Pessagno and Yang)
Nassellaria - Ultranaporidae	Napora "sp. B", Napora pualensis, Napora "bukryi", Napora aff. pyramidalis Napora "sp. B" Pessagno 1977 radiolarian Napora pualensis Blome 1984 radiolarian Author = (Blome) Napora "bukryi" Pessagno 1977 radiolarian Author = Pessagno Napora aff. pyramidalis Baumgartner 1984 radiolarian Author = Baumgartner
Nassellaria - Parvicingulidae	Parvicingula "sp. D", Parvicingula judae, Parvicingula cf. thomesensis, Parvicingula colemani, Parvicingula aff. colemani, Parvicingula turrita, Parvicingula deadhorsensis, Parvicingula cf. elegans, Parvicingula jonesi, Parvicingula excelsa, Parvicingula aff. excelsa, Praeparvicingula "rotunda", Praeparvicingula aff. rotunda, "Parvicingula aff. grantensis" = Praeparvicingula grantensis, "Praecaneta "discors"" = Praeparvicingula discors, Praeparvicingula vera, Praeparvicingula blomei, Caneta hsui Parvicingula "sp. D" Pessagno 1977 radiolarian Parvicingula judae Kiessling 1999 radiolarian Author = Kiessling, n.sp. Parvicingula cf. thomesensis Pessagno 1977 radiolarian Author = Pessagno Parvicingula colemani Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula aff. colemani Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula turrita Rüst 1898 radiolarian Author = (Rüst) Parvicingula deadhorsensis Pessagno et al. 1993 radiolarian Author = (Pessagno, Blome and Parvicingula cf. elegans Pessagno and Whalen 1982 radiolarian Author = Pessagno and Whalen Parvicingula jonesi Pessagno 1977 radiolarian Author = Pessagno Parvicingula excelsa Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Parvicingula aff. excelsa Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome 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) "Praecaneta "discors"" = Praeparvicingula discors Yang 1993 radiolarian Author = (Yang) Praeparvicingula vera Pessagno and Whalen 1982 radiolarian Author = (Pessagno and Whalen) Praeparvicingula blomei Yang 1993 radiolarian Author = (Yang) Caneta hsui Pessagno 1977 radiolarian Author = (Pessagno)
Nassellaria - Syringocapsidae	Podobursa "sp. A" Podobursa "sp. A" Wisniowski 1889 radiolarian
Nassellaria - Tripedurnulidae	? Tridentocyrtis "sp. A" ? Tridentocyrtis "sp. A" Steiger and Steiger 1994 radiolarian
Nassellaria - Eucyrtidiidae	Stichomitra "sp. C" Stichomitra "sp. C" Cayeux 1897 radiolarian
Nassellaria - Pseudodictyomitridae	Loopus primitivus Loopus primitivus Matsuoka and Yao 1985 radiolarian Author = (Matsuoka and Yao)
Nassellaria - Eucyrtiidae	Tetracapsa aff. cometa Tetracapsa aff. cometa radiolarian Author = (Pantanelli)
Nassellaria - Williriedellidae	Zhamoidellum "sp. B" Zhamoidellum "sp. B" Dumitrica 1970 radiolarian
Nassellaria - Acropyramididae	Cornutella "sp. A" Cornutella "sp. A" Ehrenberg 1838 radiolarian
Nassellaria -	? Windalia "sp. C" ? Windalia "sp. C" Ellis 1993 radiolarian
Nassellaria - Hsuidae	Hsuum feliformis, Hsuum mclaughlini, Hsuum tamanense Hsuum feliformis Jud 1994 radiolarian Author = Jud Hsuum mclaughlini Pessagno and Blome 1984 radiolarian Author = Pessagno and Blome Hsuum tamanense Yang 1993 radiolarian Author = Yang
Nassellaria - Archaeodictyomitridae	Archaeodictyomitra cf. annulata, Archaeodictyomitra shengi Archaeodictyomitra cf. annulata Kozur and Mostler 1986 radiolarian Author = Kozur and Mostler Archaeodictyomitra shengi Yang 1993 radiolarian Author = Yang