| 1. |
- Tolmacheva, T., et al.
(författare)
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The Hunneberg Stage (Ordovician) in the area east of S. Petersburg, north-western Russia
- 2001
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Ingår i: Paläontologische Zeitschrift. ; 74:4, s. 543-561
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Tidskriftsartikel (refereegranskat)abstract
- The bio- and lithostratigraphy of the poorly knownearly Ordovician (Arenig) Hunneberg Stage is described fromthe area east of St. Petersburg (Putilovo Quarry and Lava river),where the Lakity Beds (Leetse Fm.) consist of glauconiticsands and silty clays. The described fauna includes graptolites,conodonts, brachiopods, acritarchs, foraminifers, and severalproblematic groups. The Lakity Beds are unique within thelower Ordovician sequence of the East Baltic in the abundanceof graptolites, co-occurring with conodonts. The conodontsfrom the lower part of the Lakity Beds belong to the uppermostsubzone (Oelandodus elongatus - Acodus deltatus deltatus) ofthe Paroistodus proteus Zone, coinciding with the lower partof the Tetragraptus phyllograptoides Zone. This suggests thatthere is a hiatus between the Lakity Beds and the underlyingNazya Formation. The lower Lakity Beds also contain thebrachiopods Leptembolon lingulaeformis and Eosiphonotretacf. acrotretomorpha, which suggest that they may be correlatedwith the Joa Member of the Leetse Formation in NorthEstonia. In the upper part of the Lakity Beds, conodonts of thePrioniodus elegans Zone co-occur with graptolites indicatingthe upper subzone of the Tetragraptus phyllograptoides Zonein the Scandinavian sections. There are still problems of definingand correlating the base of the Billingen Regional Stage,which are outside the scope of this paper.
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| 2. |
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| 3. |
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| 4. |
- Bassett, M.G., et al.
(författare)
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The oldest-known metazoan parasite?
- 2004
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Ingår i: Journal of Paleontology. - 0022-3360 .- 1937-2337. ; 78:6, s. 1214-1216
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Tidskriftsartikel (refereegranskat)
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| 5. |
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| 6. |
- Holmer, L. E., et al.
(författare)
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Class Lingulata
- 2000
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Ingår i: Treatise on Invertebrate Paleontology, Part H (Brachiopoda). - : University Press of Kansas. - 0813731089 ; , s. 30-146
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Bokkapitel (refereegranskat)
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| 7. |
- Holmer, Lars E, et al.
(författare)
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Early Ordovician organophosphatic brachiopods with Baltoscandian affinities from the Alay Range, southern Kyrgyzstan
- 2000
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Ingår i: GFF. - : Informa UK Limited. - 1103-5897 .- 2000-0863. ; 122:4, s. 367-375
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Tidskriftsartikel (refereegranskat)abstract
- Organophosphatic-shelled brachiopods (Subphylum Linguliformea, Class Lingulata) of early Ordovician (Arenig) age are described for the first time from carbonate olistoliths within the Silurian Pulgon Formation of the Kichik Alay Range, southern Kyrgyzstan. The assemblages include Paterula? naukatensis sp. nov., Rowellella sp., Orbithele ceratopygarum (Brgger), Acrotreta korynevskii Holmer & Popov, Ombergia mirabilis gen. et sp. nov., Eoconulus cf.primus Popov & Holmer, and Palaeoglossa? aff. razumovskii (Lermontova). The Kyrgyzstanian faunas appear to correlate mainly with assemblages from the upper Hunnebergian or lower Billingenian regional stages of Baltoscandia. Taxa in common with those from the early Arenig of Baltoscandia and the South Urals include O. ceratopygarum and A. korynevskii. Ombergia mirabilis is known otherwise only from coeval strata in Baltoscandia. It is probable that the Kyrgyzstanian olistoliths originated from early Ordovician intra-oceanic volcanic island arcs in the proximity of Gondwana, and the microbrachiopod faunas around these islands may have given rise to the more widespread and richer faunas that spread across Baltica during the rest of the Ordovician, as the island complexes drifted towards Baltica.
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| 8. |
- Popov, L. E., et al.
(författare)
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Class Chileata
- 2000
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Ingår i: Treatise on Invertebrate Paleontology, Part H (Brachiopoda) Vol 2 & 3. - : Geological Society of America. - 0813731089 ; , s. 193-200
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Bokkapitel (refereegranskat)
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| 9. |
- Popov, L. E., et al.
(författare)
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Class Craniata
- 2000
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Ingår i: Treatise on Invertebrate Paleontology, Part H (Brachiopoda) 2 & 3. - : Geological Society of America. - 0813731089 ; , s. 158-192
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Bokkapitel (refereegranskat)
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| 10. |
- Popov, L. E., et al.
(författare)
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Class Obolellata
- 2000
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Ingår i: Treatise on Invertebrate Paleontology, Part H (Brachiopoda) vol. 2&3. - : Geological Society of America. - 0813731089 ; , s. 201-208
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Bokkapitel (refereegranskat)
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