PBDB Collection

Porkuni, Siuge Member: Porkuni, Estonia
collected by M. Isakar, B. Kröger, among others 2000, 2004,

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Trilobita - Phacopida - Cheiruridae

	Cheirurus (Pseudosphaerexochus) roemeri Schmidt 1881	Schmidt 1881
	recombined as Pseudosphaerexochus roemeri
Cephalopoda - Ascocerida - Hebetoceratidae

	Parvihebetoceras wahli n. gen., n. sp. Kröger 2007	Kröger 2007	9 specimens
	TUG 1227/10 to 1227/12, 1227/13 (type), 1227/41; catalogue numbers of other specimens not given
Cephalopoda - Discosorida - Cyrtogomphoceratidae

	Strandoceras orvikui n. sp. Kröger 2007	Kröger 2007	5 specimens
	TUG 1227/27 (type), 1227/28 to 1227/30; catalogue number of 5th specimen not given
Cephalopoda - Oncocerida - Oncoceratidae

	Oncoceratidae indet. Hyatt 1884	Kröger 2007	1 specimen
	TUG 1227/37
Cephalopoda - Oncocerida - Graciloceratidae

	Graciloceratidae informal indet. A Flower in Flower and Kummel 1950	Kröger 2007	3 specimens
	TUG 1227/34 to 1227/36

	Graciloceratidae informal indet. B Flower in Flower and Kummel 1950	Kröger 2007	1 specimen
	TUG 1227/25

	Pomerantsoceras tibia n. gen., n. sp. Kröger 2007	Kröger 2007	18 specimens
	TUG 1227/14 (type), 1227/17, 1227/20; catalogue numbers of other specimens not given

	Piersaloceras gageli Teichert 1930	Kröger 2007	2 specimens
	TUG 1227/32, 1227/38

	Porkunioceras tuba n. gen., n. sp. Kröger 2007	Kröger 2007	2 specimens
	TUG 1227/24 (type), TUG 1227/26
Cephalopoda - Orthocerida - Dawsonoceratidae

	Dawsonoceras fenestratum (Eichwald 1860)		8 specimens
	specimens at TUG and NMB
Cephalopoda - Orthocerida - Eriditidae

	Eriditidae indet. Chen in Chen et al 1981	Kröger 2007	4 specimens
	TUG 101/66a, 1227/13, 1227/44, 1227/47 + 1 fragment
Cephalopoda - Orthocerida - Orthoceratidae

	Orthoceratidae informal indet. A M'Coy 1844	Kröger 2007	4 specimens
	TUG 1227/1, 1227/9; catalogue numbers of other specimens not given

	Orthoceratidae informal indet. B M'Coy 1844	Kröger 2007	3 specimens
	TUG 1227/2 to 1227/4
Gastropoda - Euomphalina - Holopeidae

	Anomphalus filosus n. sp. Koken and Perner 1925	Koken and Perner 1925
	recombined as Holopea filosus
Gastropoda - Euomphalina - Helicotomidae

	Helicotoma superba n. sp. Koken 1897	Koken 1897

	Palaeomphalus gradata (Koken 1896)	Koken and Perner 1925
	original and current combination Euomphalus gradatus
Gastropoda - Euomphalina - Planitrochidae

	Pycnomphalus borkholmiensis n. sp. Koken 1897	Koken 1897
	recombined as Trochomphalus borkholmiensis
Gastropoda - Euomphalina - Craspedostomatidae

	Umbonellina infrasilurica n. gen., n. sp. Koken and Perner 1925	Koken and Perner 1925
Gastropoda - Euomphalina - Platyceratidae

	Eunema rupestre (d'Eichwald 1856)	Koken and Perner 1925
	recombined as Cyclonema rupestre
Gastropoda - Murchisoniina - Lophospiridae

	Worthenia borkholmiensis n. sp. Koken 1896	Koken 1896
	recombined as Ruedemannia borkholmiensis

	Worthenia aista n. sp. Koken 1896	Koken 1896
	synonym of Ruedemannia lirata

	Worthenia tolli n. sp. Koken 1897	Koken 1897
	recombined as Ruedemannia tolli

	Murchisonia nieszkowskii n. sp. Schmidt 1858	Schmidt 1858
	recombined as Ectomaria nieszkowskii
Gastropoda - Murchisoniina - Trochonematidae

	Trochonema peraltum n. sp. Koken 1897	Koken 1897

	Trochonema panderi n. sp. Koken 1896	Koken 1896

	Trochonema minus n. sp. Koken 1897	Koken 1897
Gastropoda - Murchisoniina - Hormotomidae

	Murchisonia meyendorfi n. sp. Koken 1897	Koken 1897
	recombined as Hormotoma meyendorfi
Gastropoda - Murchisoniina - Gosseletinidae

	? Globispira nitida n. sp. Koken and Perner 1925	Koken and Perner 1925
	recombined as Cataschisma nitida
Gastropoda - Murchisoniina - Eotomariidae

	Eocryptaenia singularis n. gen., n. sp. Koken and Perner 1925	Koken and Perner 1925
Rostroconchia - Conocardiida - Bransoniidae

	Cardium pygmaeum n. sp. Hisinger 1837	Hisinger 1837
	= Pojetaconcha pygmaea n. sp. Hisinger 1837	Wagner 2023
	original and current combination Cardium pygmaeum
	Opinions won't take.
Rhynchonellata - Orthida - Wangyuiidae

	Sigmelasma peepi Hints 2012	Hints 2012	60 specimens
Rhynchonellata - Orthida - Rhipidomellidae

	Mendacella aerinensis Hints 2012	Hints 2012	12 specimens
Rhynchonellata - Orthida - Tyronellidae

	Tyronella siugensis Hints 2012	Hints 2012	28 specimens
Rhynchonellata - Orthida - Draboviidae

	Drabovia minuta Hints 2012	Hints 2012	15 specimens
Strophomenata - Orthotetida - Triplesiidae

	Streptis undifera (Ulrich and Cooper 1936)	Hints et al. 2013	51 specimens
	Streptis incompta
Strophomenata - Strophomenida - Rafinesquinidae

	Schmidtomena acuteplicata (Schmidt 1908)	Roomusoks 2004	25 specimens
see common names

Geography

Country:	Estonia	State/province:	Lääne-Viru	County:	Tamsalu
Coordinates:	59.2° North, 26.2° East (view map)
Paleocoordinates:	26.2° South, 0.3° West
Basis of coordinate:	stated in text
Geographic resolution:	small collection

Time

Period:	Ordovician	Epoch:	Late/Upper Ordovician
Stage:	Hirnantian	10 m.y. bin:	Ordovician 5
Key time interval:	Porkuni	Graptolite zone:	Normalograptus extraordinarius
Age range of interval:	445.20000 - 443.80000 m.y. ago

Stratigraphy

Formation:	Ärina	Member:	Siuge
Stratigraphic resolution:	member
Stratigraphy comments: The Porkuni Regional Stage is formerly known as the "Borkholm'sche Schicht" (Raukas & Teedumäe [eds.] 1997, Geology and Mineral Resources of Estonia, html version, http://sarv.gi.ee/geology). Spinachitina taugourdeaui chitinozoan zone.

Lithology and environment

Primary lithology:	shelly/skeletal lithified lime mudstone
Secondary lithology:	nodular,shelly/skeletal chert
Includes fossils?	Y
Includes fossils?	Y
Lithology description: "The Siuge Member consists of a succession of roughly 1.5 m slightly dolomitised biomicritic wackestones to micritic bioclastic packstones. The skeletal grains include fragments of crinoids, ostracods, and brachiopods. Grains of quartz only account for less than 10% of the total sediment (Oraspõld 1975). A relatively high content of bitumen is characteristic of the sediments of the Siuge Member. The limestones consist of cross-bedded channel fillings with thin argillaceous interlayers (Fig. 3). Locally, layers or nodules of chert occur at the bottom of the channel structures. The layers with chert nodules have a thickness of less than five centimetres and contain numerous small but macroscopic remains of predominantly bryozoan zooaria, ostracod tests, and echinoderm ossicles. Gastropods, bivalves, graptolites, and cephalopods are less common, but occur in considerable numbers." (Kröger, 2007)
Environment:	perireef or subreef
Geology comments: "North Estonian Confacies Belt at the northern flank of the Livonian Tongue" (Kröger & Isakar, 2006); "inter-reef facies" (Raukas & Teedumäe [eds.] 1997, Geology and Mineral Resources of Estonia, html version, http://sarv.gi.ee/geology); A more datailed description of environment and setting is given in Kröger (2007).

Taphonomy

Modes of preservation:	body,cast,recrystallized,replaced with silica
Size of fossils:	macrofossils
Preservation of anatomical detail:	variable
Abundance in sediment:	abundant
Articulated whole bodies:	none
Spatial resolution:	autochthonous

Collection methods and comments

Collection excludes:	some macrofossils,difficult macrofossils
Collection methods:	field collection,survey of museum collection
Reason for describing collection:	taxonomic analysis
Museum repositories:	MfN
Collectors:	M. Isakar, B. Kröger, among others	Collection dates:	2000, 2004, and earlier
Collection method comments: TUG = Tartu Ülikool Geoloogiamuuseum, Tartu, Estonia NMB = Museum für Naturkunde Berlin The materials "have been collected since the nineteenth century by Wilhelm Dames, Walther Rosenberg (at reposition of NMB), Arwed von Wahl (in collection of GIT), Karl Orviku, and Ülle Sirk. However, the bulk of the material was collected by Mare Isakar (Tartu) and Björn Kröger (stored in the collection of TUG) during two field trips in 2002 and 2004." (Kröger, 2007)
Taxonomic list comments:I added Koken's Borkholm taxa to this list, as they are from this member of the formation at Porkuni.

Metadata

Also known as:

Borkholm

Database number:

87313

Authorizer:

B. Kröger, P. Wagner

Enterer:

T. Liebrecht, P. Wagner, B. Kröger

Modifier:

P. Wagner

Research group:

marine invertebrate

Collections that are a subset of this one:

152016, 152017, 152018, 152020, 152021

Created:

2009-03-14 17:53:59

Last modified:

2018-04-11 17:22:18

Access level:

the public

Released:

2009-03-14 17:53:59

Creative Commons license:

CC BY

Reference information

Primary reference:

29316.

B. Kröger and M. Isakar. 2006. Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician. Fossil Record 9(1):137-163 [B. Kröger/B. Kröger/B. Kröger]

Secondary references:

48689		L. Hints. 2012. New Hirnantian orthide brachiopods from the type section of the Porkuni Stage (Porkuni quarry, northeastern Estonia). Estonian Journal of Earth Sciences 61(4):227-241 [P. Wagner/P. Wagner/B. Kröger]
52935		L. Hints, L. Popov, and L.E. Holmer. 2013. Morphology, Ontogeny and Affinities of the Hirnantian Triplisiid Brachiopod Streptis undifera from Baltoscandia. Palaeontology, 2013 (2013)1-10 [B. Kröger/B. Kröger]
15543		W. v. Hisinger. 1837. Lethaea svecica seu petrificata sveceia, iconibus et characteribus illustrata 1-124 [P. Wagner/P. Wagner/P. Wagner]
16116		E. Koken. 1896. Die Leitfossilien. Ein Handbuch für den Unterricht und für das Bestimmen von Versteinerungen 1-848 [P. Wagner/P. Wagner/P. Wagner]
13884		E. Koken. 1897. Die Gastropoden des baltischen Untersilurs. Bulletin de l'Académie Impériale des Sciences de St. Pétersburg 7(2):97-214 [P. Wagner/P. Wagner/P. Wagner]
11503		E. Koken and J. Perner. 1925. Die Gastropoden des baltischen Untersilurs 1-324 [P. Wagner/P. Wagner/P. Wagner]
29465		B. Kröger. 2007. Concentrations of juvenile and small adult cephalopods in the Hirnantian cherts (Late Ordovician) of Porkuni, Estonia. Acta Palaeontologica Polonica 52(3):591-608 [B. Kröger/T. Liebrecht]
55097		A. Roomusoks. 2004. Ordovician strophomenoid brachiopods of northern Estonia. Fossilia Baltica 3:1-150 [B. Kröger/B. Kröger/P. Wagner]
16329		F. Schmidt. 1858. Untersuchungen über die Silurische Formation von Ehstland, Nord-Livland und Oeseland. Archiv für die Naturkunde Livland, Ehstland und Kurlands (1) 2:1-248 [P. Wagner/P. Wagner]
49889		F. Schmidt. 1881. Revision der ostbaltischen silurischen Trilobiten. Abtheilung I: Phacopiden, Cheiruriden und Encrinuriden. Mémoires de L'Académie Impériale des Sciences de Saint-Petersbourg, Series 7 30(1):1-237 [P. Wagner/P. Wagner/P. Wagner]
9042		P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]