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

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