Poraspididae Kiaer 1932
Description
Poraspididae gen. et sp. indet.
(Fig. 6G, H)
MATERIAL. — Specimens GIT 580-4, 6 and 7 of the Institute of Geology, Tallinn University of Technology, Estonia: fragments of a flank scale (GIT 580-4) and of undetermined plates (GIT 580-6 and 7).
LOCALITY AND STRATIGRAPHIC HORIZON. — Locality (sample) 73, Tonnel’nyj Brook, south of De Long Strait, Chukotka; Lower Member (1) of Enmakaj Formation, Lochkovian.
DESCRIPTION ħis material is represented by three small fragmentary remains of dermal bony elements. ħe specimen GIT 580-4 (Fig. 6G) is from a flank scale of a poraspidid heterostracan similar to the scales figured, for example, by Blieck (1982: pl. VIII: 2, 4: Poraspis rostrata Kiaer &Heintz, 1935). It bears six flat dentine ridges per mm as in various Poraspis Kiaer,1930 species from the Lochkovian of Spitsbergen (Blieck& Heintz 1983: table 1). ħe specimen GIT 580-7 (Fig. 6H) has more vaulted (convex) and wider(2/mm) dentine ridges.It probably also comes from a poraspidid plate.
Notes
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Linked records
Additional details
Identifiers
Related works
- Cites
- Figure: 10.5281/zenodo.5372272 (DOI)
- Is part of
- Journal article: 10.5252/g2013n3a3 (DOI)
- Journal article: http://zenodo.org/record/5372262 (URL)
- Journal article: http://publication.plazi.org/id/B506FFD2FF9E6228684EFFCBFFADFFF2 (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/493F87AAFF9462236B43FA00FD29FD3F (URL)
Biodiversity
- Family
- Poraspididae
- Kingdom
- Animalia
- Order
- Heterostraci
- Phylum
- Chordata
- Scientific name authorship
- Kiaer
- Taxon rank
- family
- Taxonomic concept label
- Poraspididae Kiaer, 1932 sec. Mark-Kurik, Blieck, Burrow & Turner, 2013
References
- BLIECK A. 1982. - Les Heterostraces (Vertebres Agnathes) de l'horizon Vogti (Groupe de Red Bay, Devonien inferieur du Spitsberg). Cahiers de Paleontologie, Paris, CNRS edit., 51 p. [in French, with English abstract]
- BLIECK A. & HEINTZ N. 1983. - he Cyathaspids of the Red Bay Group (Lower Devonian) of Spitsbergen. (he Downtonian and Devonian vertebrates of Spitsbergen. XIV) Polar Research 1, n. s. (1): 49 - 74.