Skeinidioides lewisii-Isorthis amplificata Comm. in Grauzai borehole: Wenlock, Lithuania

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Lingulida - Lingulidae
Lingulidae indet. Gray 1840
Craniata - Craniopsida - Craniopsidae
Craniops implicata
Strophomenata - Strophomenida - Strophochonetidae
Protochonetes minimus (Sowerby 1839)
Strophomenata - Strophomenida - Sowerbyellidae
Ygerodiscus sp. (Havlicek 1967)
original and current combination Eoplectodonta (Ygerodiscus)
Eoplectodonta duvalii (Davidson 1847)
Strophomenata - Strophomenida - Leptestiidae
Leangella segmentum (Lindstrom 1861)
recombined as Leangella (Leangella) segmentum
Strophomenata - Strophomenida - Aegiromenidae
Aegiria grayi (Davidson 1849)
recombined as Jonesea grayi
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena holcrofti Bassett 1974
Rhynchonellata - Spiriferida - Delthyrididae
Delthyris elevata Dalman 1828
Rhynchonellata - Spiriferida - Cyrtiidae
Cyrtia exporrecta (Wahlenberg 1818)
recombined as Cyrtia exporrectus
Eospirifer radiatus (Sowerby 1834)
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira pisum (Sowerby 1839)
Rhynchonellata - Athyridida - Dayiidae
Protozeuga bicarinata (deVerneuil 1848)
Rhynchonellata - Atrypida - Atrypinidae
Atrypina barrandii (Davidson 1848)
Rhynchonellata - Atrypida - Lissatrypidae
Glassia obovata (Sowerby 1839)
recombined as Lissatrypa obovata
Rhynchonellata - Atrypida - Atrypidae
Atrypa reticularis (Linnaeus 1758)
original and current combination Anomia reticularis
Rhynchonellata - Protorthida - Skenidiidae
Skenidioides lewisii (Davidson 1848)
Rhynchonellata - Orthida - Dicoelosiidae
Dicoelosia biloba (Linnaeus 1758)
Rhynchonellata - Orthida - Rhipidomellidae
Mendacella parva
Dalejina hybrida (Sowerby 1839)
Rhynchonellata - Orthida - Dalmanellidae
Resserella canalis (Sowerby 1839)
Resserella sabrinae Bassett 1972
Isorthis amplificata Walmsley 1965
recombined as Isorthis (Tyersella) amplificata
Rhynchonellata - Orthida - Hesperorthidae
Dolerorthis sp. Schuchert and Cooper 1931
see common names

Geography
Country:Lithuania
Coordinates: 55.3° North, 23.2° East (view map)
Paleocoordinates:20.9° South, 1.0° East
Geographic resolution:outcrop
Time
Period:Silurian Epoch:Wenlock
10 m.y. bin:Silurian 2
Key time interval:Wenlock
Age range of interval:433.40000 - 427.40000 m.y. ago
Stratigraphy
Formation:Birstonas and Paprieniai
Stratigraphic resolution:group of beds
Stratigraphy comments: Jonava beds of the Birstonas Formation and Vilkija beds of the Paprieniai Formation.
Lithology and environment
Primary lithology:gray,green marl
Secondary lithology:concretionary "limestone"
Lithology description: "Widespread in greenish-gray marls with microcrystalline limestone interbeds of the fourth facies zone, and in greenish-gray marls with limestone nodules and wavy bedded interbeds of the thrid facies zone (Nestor & Einasto 1977). The articulation data indicate a normal level of turbulence consistent with normal oxygen level...The occurrence of I. amplificata in more carbonate-rich (shallwer)_ rocks than I. clivosa...allows us to assert that this community was distributed inshore from the S.lewisii-I.clivosa Comm. at the BA 3-4 boundary, but not really far into BA 3."
Environment:marine indet.
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: I have lumped two separate levels in the borehole and have omitted the absolute and relative abundance data supplied. It is not possible to discern from the information given which borehole level corresponds with Jonava beds and which with Vilkija beds.
Metadata
Database number:13746
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-04-23 12:35:01 Last modified:2006-09-15 15:14:05
Access level:the public Released:2002-04-23 12:35:01
Creative Commons license:CC BY
Reference information

Primary reference:
6146. P. Musteikis and J. J. Paskevicius. 1999. Brachiopod communities of the Lithuanian Silurian. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 305-326 [M. Foote/M. Foote/P. Wagner]