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Published December 31, 2002 | Version v1
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Silurian and Lower Devonian anaspids (Agnatha) from Severnaya Zemlya (Russia)

Creators

  • 1. Institute of Geology, Tallinn Technical University, 7 Estonia Avenue, 10143 Tallinn (Estonia) marss@gi.ee In the Severnaya Zemlya Archipelago, Silurian anaspids are represented by scales of at least six different types of sculpture, and some subtypes, called Birkeniida sp. C, Birkeniida sp. C1, Birkeniida sp. C?, Birkeniida sp. D, Birkeniida sp. F, Birkeniida sp. F?, Birkeniida sp. G., Birkeniida sp. H and Birkeniida sp. J. In addition, Birkenia? sp. was recognized. A new taxon was erected on the basis of the material from the Severnaya Zemlya Formation, Lower Devonian. In the specimen, the trunk squamation is rather well preserved, but the head and the caudal fin are lacking. Characteristic are very big dorsal ridge scales. The stratigraphical range of anaspids on Severnaya Zemlya is from Wenlock to Lochkov. Anaspides (Agnatha) du Silurien et du Dévonien inférieur de Severnaya Zemlya (Russie). Dans l'archipel de Severnaya Zemlya, les anaspides siluriens sont représentés par des écailles appartenant à au moins six types (avec quelques sous-types) d'ornementation différents nommés Birkeniida sp. C, Birkeniida sp. C1, Birkeniida sp. C?, Birkeniida sp. D, Birkeniida sp. F, Birkeniida sp. F?, Birkeniida sp. G., Birkeniida sp. H et Birkeniida sp. J. De plus, Birkenia? sp. a été identifié. Un nouveau taxon a été créé à partir du matériel de la Formation Severnaya Zemlya, Dévonien inférieur. Sur le spécimen, l'écaillure du tronc est assez bien conservée mais la tête et la nageoire caudale lui font défaut. De fortes écailles faîtières dorsales sont caractéristiques de ce taxon. Stratigraphiquement, les anaspides de Severnaya Zemlya ont une extension verticale du Wenlock au Lochkovien.

Description

Märss, Tiiu (2002): Silurian and Lower Devonian anaspids (Agnatha) from Severnaya Zemlya (Russia). Geodiversitas 24 (1): 123-137, DOI: 10.5281/zenodo.5374651

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urn:lsid:plazi.org:pub:FFBB36397563FF8E2D744251DA65575D
URL
http://publication.plazi.org/id/FFBB36397563FF8E2D744251DA65575D

Related works

Has part
Taxonomic treatment: http://treatment.plazi.org/id/03824E41756AFF822DA74764D9E855BB (URL)
Figure: 10.5281/zenodo.5374655 (DOI)
Figure: 10.5281/zenodo.5374657 (DOI)
Figure: 10.5281/zenodo.5374659 (DOI)

References

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