Thallophytic algal flora from a new Silurian Lagerstätte

Tinn, Oive; Meidla, Tõnu; Ainsaar, Leho; Pani, Tõnu

doi:10.3176/earth.2009.1.04

Cited by 27 publications

(28 citation statements)

References 7 publications

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“…As a rule, the algal fossils in Kalana are non-calcified and do not show any traces of possible carbonate skeleton (Tinn et al, 2009). Kalania pusilla occurs as black or dark brown carbonaceous compression fossils.…”

Section: Methodsmentioning

confidence: 99%

“…Some surfaces show graptoloid graptolites; micropaleontological samples yield low diversity scolecodont and ostracode fauna. In addition to typical normal marine nearshore sediments and fauna, a few beds show thin lamination, layers with desiccation cracks, abundant leperditiid crustaceans, and occasional eurypterid remains, suggesting short-term periods of shallow lagoonal environments (Tinn et al, 2009). …”

Section: Geological Settingmentioning

confidence: 98%

“…The algal flora in the Kalana Lagerstätte, Estonia, comprises around ten morphologically distinguishable macroscopic species (Tinn et al, 2009). Many algal fossils in Kalana can be classified to the green algal order Dasycladales (Division Chlorophyta, Class Ulvophyceae), an extant group of tropical to subtropical shallow water marine green algae, with a long and highly diverse fossil record that is dominated by calcareous forms (Berger and Kaever, 1992;Kenrick and Vinther, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Kalania pusilla, an exceptionally preserved non-calcified alga from the lower Silurian (Aeronian, Llandovery) of Estonia

et al. 2015

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Section: Methodsmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Kalania pusilla, an exceptionally preserved non-calcified alga from the lower Silurian (Aeronian, Llandovery) of Estonia

et al. 2015

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“…Discussion. -LoDuca (1990, Mierzejewski (1991) and Tinn et al (2009) fig. 16) clearly shows a bivalved imprint in black shale.…”

Section: Genera Of Uncertain Relationships and Non-graptolitic Taxamentioning

confidence: 99%

The classification of the Pterobranchia (Cephalodiscida and Graptolithina)

Maletz¹

2014

Bull. Geosci.

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This paper presents a proposal for a taxonomic approach to the classification of the Pterobranchia (Cephalodiscida and Graptolithina) to be adopted for the revision of the Treatise on Invertebrate Paleontology, Part V (Hemichordata), currently in preparation. A combination of traditional Linnaean taxonomy, supported by cladistic analyses in some groups is proposed herein as a practical solution for the classification of the Graptolithina as for many groups a cladistic analysis has never been attempted and is unlikely to be undertaken in the near future. The number of ranked taxa has been kept as low as possible, with all genus level taxa referred to a family. All families and higher taxonomic units are discussed, but new taxa have not been introduced. Paraphyletic (but not polyphyletic) taxa are accepted as useful units in this classification. A number of recently introduced taxonomic units, based on cladistic analyses (e.g. Eugraptoloida, Pan-Reclinata, Pan-Bireclinata), are discussed in the context of this classification and the usefulness of these taxa is critically evaluated. The solution proposed here opts not to name a number of nodes from the published cladistic analyses that potentially could be named and in some cases have been named -not to inflate the hierarchy of the used taxonomic system. Taxa are kept as close as possible to their original definition and not unnecessarily expanded or restricted. The taxonomy proposed here for the Graptolithina indicates that the extensive use of higher level taxa, e.g. orders for small groups of genera as has been done for many benthic graptolite groups in the past is unnecessary and should be avoided.•

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“…In addition, the genus has been reported from the Ordovician of China (Mu et al 1979;Lin 1984), and Shrock (1928) and Tinn et al (2009) reported what were regarded as possible occurrences from the Silurian of Indiana and Estonia, respectively. Here, a new occurrence of Medusaegraptus is reported from the Pridolian to middle Lochkovian Indian Point Formation in the Flatlands area of New Brunswick (Fig.…”

Section: Introductionmentioning

confidence: 99%

Medusaegraptus (Chlorophyta, Dasycladales) from the Pridolian to middle Lochkovian Indian Point Formation, New Brunswick, Canada

LoDuca

Miller

Wilson³

2013

atgeol

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Carbonaceous compressions from the Pridolian to middle Lochkovian Indian Point Formation in the Flatlands area of New Brunswick comprising a central axis with irregularly arranged unbranched appendages are assigned to Medusaegraptus mirabilis. This is the first report of intact thalli of this noncalcified macroalgal taxon from a locality outside of western New York. The biotic composition, stratigraphic context, and sedimentology of this occurrence suggest a shallow-marine depositional setting roughly comparable to that for the type material of Medusaegraptus mirabilis from Gasport, New York. ABstrACt rÉsUMÉLes fossiles carbonés comprimés de la formation d'Indian Point, située dans la région de Flatlands du Nouveau-Brunswick et qui date du Pridolien au Lochkovien moyen, sont attribués à Medusaegraptus mirabilis; ils présentent un axe central avec des appendices non ramifiés et disposés de façon irrégulière. C' est la première fois qu' on signale la présence de thalles intacts de ce taxon de macroalgues non calcifiées dans une localité ailleurs que dans l' ouest de l'État de New York. La composition biotique, le contexte stratigraphique et les données sédimentologiques permettent de penser à un dépôt marin peu profond à peu près comparable à ce qu' on trouve dans le cas de Medusaegraptus mirabilis de Gasport, dans l'État de New York.

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Thallophytic algal flora from a new Silurian Lagerstätte

Cited by 27 publications

References 7 publications

Kalania pusilla, an exceptionally preserved non-calcified alga from the lower Silurian (Aeronian, Llandovery) of Estonia

Kalania pusilla, an exceptionally preserved non-calcified alga from the lower Silurian (Aeronian, Llandovery) of Estonia

The classification of the Pterobranchia (Cephalodiscida and Graptolithina)

Medusaegraptus (Chlorophyta, Dasycladales) from the Pridolian to middle Lochkovian Indian Point Formation, New Brunswick, Canada

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