PBDB Collection

Longing Gap Radiolarians, K 44: Late Tithonian, Antarctica

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Protozoa - Spumellaria - Praeconocaryommidae

	? Praeconocaryomma informal sp. B	1 individual
Protozoa - Spumellaria - Patulibracchiidae

	Homoeoparonaella elegans (Pessagno 1977)	3 individuals
	ssp. yangi, Author = Kiessling, n.ssp.
Protozoa - Spumellaria - Spongodiscidae

	Spongotripus pujanai Kiessling 1999	1 individual
	Author = Kiessling, n.sp.

	Spongodiscus informal sp. A	1 individual
Protozoa - Spumellaria - Tritrabidae

	Neoparonaella delicata Yang 1993	6 individuals
	Author = Yang
Protozoa - Spumellaria - Angulobracchiidae

	Paronaella aff. venusta Blome 1984	1 individual
	Author = Blome

	Paronaella mulleri Pessagno 1977	1 individual
	Author = Pessagno

	Paronaella aff. pristidentata Baumgartner 1980	1 individual
	Author = Baumgartner
Protozoa - Spumellaria - Orbiculiformidae

	? Orbiculiforma hullae Kiessling 1999	1 individual
	Author = Kiessling, n.sp.

	Spongostaurus australis Kiessling 1999	6 individuals
	Author = Kiessling, n.sp.
Protozoa - Spumellaria - Pseudoaulophacidae

	? Alievium informal sp. C	6 individuals
Protozoa - Spumellaria - Emiluviidae

	? Emiluvia aff. pessagnoi Foreman 1973	2 individuals
	Author = Foreman

	Emiluvia parvinodosa Kiessling 1999	1 individual
	Author = Kiessling, n.sp.

	Emiluvia aff. parvinodosa Kiessling 1999	1 individual
	Author = Kiessling, n.sp.
Protozoa - Spumellaria - Parvivaccidae

	Acaeniotyle sp. Foreman 1973	3 individuals

	Acaeniotyle parva Yang 1993	3 individuals
	Author = Yang

	Praeconosphaera sphaeroconus (Rüst 1898)	10 individuals
	Author = (Rüst)
Protozoa - Spumellaria

	Plegmosphaera informal sp. A	1 individual

	Plegmosphaera informal sp. D	1 individual
Protozoa - Spumellaria - Archaeospongoprunidae

	? Archaeospongoprunum informal sp. A	2 individuals

	Archaeospongoprunum aff. helense Blome 1984	36 individuals
	Author = Blome
Protozoa - Spumellaria - Hagiastridae

	Crucella magna (Blome 1984)	1 individual
	Author = (Blome)
Protozoa - Spumellaria

	Spongiomma informal sp. E	1 individual
Protozoa - Entactinaria - Saturnalidae

	Acanthocircus euganeus (Squinabol 1914)	2 individuals
	Author = (Squinabol)

	Acanthocircus yaoi Yang 1993	4 individuals
	Author = Yang

	Acanthocircus moctezumaensis Yang 1993	2 individuals
	Author = Yang
Protozoa - Entactinaria - Hexalonchidae

	? Hexalonche informal sp. A	1 individual
Protozoa - Entactinaria - Hexastylidae

	? Hexastylus informal sp. A	12 individuals

	? Hexastylus grahamensis Kiessling 1999	17 individuals
	Author = Kiessling, n.sp.
Protozoa - Nassellaria - Ultranaporidae

	Napora informal sp. A	2 individuals

	Napora pualensis (Blome 1984)	5 individuals
	Author = (Blome)

	Napora irregularis n. sp. Kiessling 1999	9 individuals
	Author = Kiessling, n.sp.

	Napora pacifica Kiessling 1999	1 individual
	Author = Kiessling, n.sp.
Protozoa - Nassellaria - Williriedellidae

	Williriedellum frequens (Tan Sin Hok 1927)	4 individuals
	Author = (Tan Sin Hok)

	Zhamoidellum informal sp. B	1 individual

	Zhamoidellum boehmi n. sp. Kiessling 1999	4 individuals
	Author = Kiessling, n.sp.
Protozoa - Nassellaria

	? Windalia informal sp. A	4 individuals

	? Windalia informal sp. C	1 individual

	? Windalia informal sp. D	22 individuals
Protozoa - Nassellaria - Acropyramididae

	Cornutella informal sp. A	1 individual

	Cornutella informal sp. B	3 individuals
Protozoa - Nassellaria - Sethocapsidae

	Arcanicapsa aff. adrianae (Jud 1994)	12 individuals
	Author = (Jud)
Protozoa - Nassellaria - Eucyrtiidae

	Tetracapsa molengraaffi (Tan Sin Hok 1927)	4 individuals
	Author = (Tan Sin Hok)
Protozoa - Nassellaria - Eucyrtidiidae

	Stichomitra informal sp. B	1 individual

	Pseudoeucyrtis informal sp. A	24 individuals

	Pseudoeucyrtis informal sp. B	51 individuals

	Stichocapsa singularis Tan Sin Hok 1927	2 individuals
	Author = Tan Sin Hok
Protozoa - Nassellaria - Hsuidae

	Hsuum aff. tamanense Yang 1993	2 individuals
	Author = Pessagno and Blome
Protozoa - Nassellaria - Bagotidae

	Canutus informal sp. A	1 individual
Protozoa - Nassellaria - Spongocapsulidae

	? Spongocapsula informal sp. E	2 individuals
Protozoa - Nassellaria - Parvicingulidae

	Tethysetta boesii (Parona 1890)	4 individuals
	Author = (Parona)

	Praeparvicingula informal sp. B	1 individual

	? Praeparvicingula informal sp. E	1 individual

	Praeparvicingula vera (Pessagno and Whalen 1982)	10 individuals
	Author = (Pessagno and Whalen)

	Parvicingula aff. grantensis Pessagno and Whalen 1982	2 individuals
	Author = (Pessagno and Whalen)

	Praecaneta discors (Yang 1993)	3 individuals
	Author = (Yang)

	Praeparvicingula aff. rotunda Hull 1995	1 individual
	Author = Hull

	Praeparvicingula holdsworthi (Yang 1993)	1 individual
	Author = (Yang)

	Darvelus primus Hull 1995	1 individual
	Author = Hull

	Darvelus cf. pessagnoi Hull 1995	1 individual
	Author = Hull

	? Parvicingula informal sp. B	1 individual

	Parvicingula gracila Hull 1995	9 individuals
	Author = Hull

	Parvicingula jonesi Pessagno 1977	1 individual
	Author = Pessagno

	Parvicingula colemani Pessagno and Blome 1984	8 individuals
	Author = Pessagno and Blome

	Parvicingula aff. colemani Pessagno and Blome 1984	4 individuals
	Author = Pessagno and Blome

	Parvicingula excelsa Pessagno and Blome 1984	10 individuals
	Author = Pessagno and Blome

	Parvicingula aff. excelsa Pessagno and Blome 1984	2 individuals
	Author = Pessagno and Blome
Protozoa - Xiphostylidae

	Tripocyclia triacuminata	2 individuals
	Author = (Lipman)

	? Tripocyclia informal sp. A	3 individuals

	Triactoma spinosa (Pessagno et al. 1989)	3 individuals
	Author = (Pessagno and Yang)
see common names

Geography

Country:	Antarctica
Coordinates:	64.5° South, 59.0° West (view map)
Paleocoordinates:	63.3° South, 34.0° West (Wright 2013)
Basis of coordinate:	unpublished field data
Geographic resolution:	hand sample

Time

Period:	Jurassic	Epoch:	Late Jurassic
Stage:	Tithonian	10 m.y. bin:	Jurassic 6
Key time interval:	Late Tithonian
Age range of interval:	145.06 - 143.1 m.y. ago

Stratigraphy

Formation:	Ameghino	Member:	Ameghino
Local section:	Longing Gap	Local bed:	406 m
Local order:	bottom to top
Stratigraphic resolution:	bed

Lithology and environment

Primary lithology:	planar lamination,concretionary,tuffaceous,black lithified mudstone
Lithology description: Mudstone concretion with tuff layers
Environment:	basinal (siliciclastic)	Tectonic setting:	back-arc basin
Geology comments: 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.

Taphonomy

Modes of preservation:	body,concretion
Lagerst�tten type:	conservation
Size of fossils:	microfossils
Preservation of anatomical detail:	excellent

Collection methods and comments

Collection methods:	bulk,chemical,hydrochloric,sieve,field collection
Minimum sieve size:	0.062	Maximum sieve size:	0.750
Reason for describing collection:	paleoecologic analysis
Collection method comments: Radiolarians only. Additional faunal elements are sponge spicules and very rare foraminifera.

Metadata

Database number:	46968
Authorizer:	W. Kiessling	Enterer:	W. Kiessling
Modifier:	W. Kiessling	Research group:	micropaleontology
Created:	2005-01-27 11:49:08	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	2005-01-27 11:49:08
Creative Commons license:	CC0

Reference information

Primary reference:

800.

W. Kiessling. 1999. Late Jurassic radiolarians from the Antarctic Peninsula. Micropaleontology 45(S1):1-96 [W. Kiessling/W. Kiessling]