Poraspididae Kiaer 1932

• Main Authors: Mark-Kurik, Elga, Blieck, Alain, Burrow, Carole J., Turner, Susan
• Format: Text
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Agnatha; Heterostraci; Poraspididae; Arctic; Red Bay; Chukotka; Spitsberg; Spitsbergen
• Online Access: https://dx.doi.org/10.5281/zenodo.5463523; https://zenodo.org/record/5463523

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. : Published as part of Mark-Kurik, Elga, Blieck, Alain, Burrow, Carole J. & Turner, Susan, 2013, Early Devonian fishes from coastal De Long Strait, central Chukotka, Arctic Russia, pp. 545-578 in Geodiversitas 35 (3) on pages 555-556, DOI: 10.5252/g2013n3a3, http://zenodo.org/record/5372262 : {"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."]}