Skeinidioides lewisii-Isorthis amplificata Comm. in Up.Riga&Lo.Geluva Fmns.: Wenlock, Lithuania

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Lingulida - Discinidae
Orbiculoidea sp. d'Orbigny 1847
Lingulata - Lingulida - Lingulidae
Lingulidae indet. Gray 1840
Craniata - Craniopsida - Craniopsidae
Craniops implicatus
Rhynchonellata - Pentamerida - Clorindidae
? Clorinda sp. Barrande 1879
Rhynchonellata - Pentamerida - Gypidulidae
Gypidula galeata (Dalman 1828)
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Microsphaeridiorhynchus nucula (Sowerby 1839)
Rhynchotreta cuneata (Dalman 1828)
Rhynchonellata - Rhynchonellida - Camarotoechiidae
Plagiorhyncha analoga
Rhynchonellata - Spiriferida - Delthyrididae
Howellella elegans Muir-Wood 1925
Rhynchonellata - Spiriferida - Cyrtiidae
Striispirifer plicatellus (Linnaeus 1758)
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 - Athyridida - Dayiidae
Protozeuga bicarinata (deVerneuil 1848)
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira pisum (Sowerby 1839)
Rhynchonellata - Athyridida - Meristellidae
Meristina podolica (Nikiforova 1954)
Rhynchonellata - Athyridida - Rhynchospirinidae
Homoeospira baylei (Davidson 1848)
Rhynchonellata - Orthida - Rhipidomellidae
Mendacella parva
Dalejina hybrida (Sowerby 1839)
Rhynchonellata - Orthida - Dalmanellidae
Ravozetina sawddensis
Isorthis amplificata Walmsley 1965
recombined as Isorthis (Tyersella) amplificata
Isorthis clivosa
Onniella pashkevichiusi Musteikis and Paskevicius 1999
Resserella canallis
Resserella basalis (Dalman 1828)
Rhynchonellata - Orthida - Draboviidae
Salopina rubeli
Rhynchonellata - Protorthida - Skenidiidae
Skenidioides lewisii (Davidson 1848)
Strophomenata - Strophomenida - Leptostrophiidae
Leptostrophia (Leptostrophia) filosa (Sowerby 1839)
recombined as Mesoleptostrophia filosa
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena holcrofti Bassett 1974
Strophomenata - Strophomenida - Eopholidostrophiidae
Pholidostrophia (Mesopholidostrophia) laevigata (de Sowerby and Murchison 1839)
recombined as Mesopholidostrophia laevigata
Strophomenata - Strophomenida - Strophochonetidae
Protochonetes minimus (Sowerby 1839)
Strophomenata - Strophomenida - Leptestiidae
Leangella segmentum (Lindstrom 1861)
recombined as Leangella (Leangella) segmentum
see common names

Geography
Country:Lithuania
Coordinates: 54.7° North, 23.0° East (view map)
Paleocoordinates:21.4° South, 1.3° East
Basis of coordinate:based on nearby landmark
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:Riga and Geluva
Stratigraphic resolution:group of beds
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 three 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 levels correspond with Riga and which with Geluva.
Metadata
Database number:13745
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-04-23 12:19:22 Last modified:2006-09-15 15:14:05
Access level:the public Released:2002-04-23 12:19:22
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]