Heterostraci

• Main Authors: Mark-Kurik, Elga, Blieck, Alain, Burrow, Carole J., Turner, Susan
• Format: Text
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Heterostraci; Arctic; Chukotka
• Online Access: https://dx.doi.org/10.5281/zenodo.5463527; https://zenodo.org/record/5463527

HETEROSTRACI? indet. (Fig. 6I) MATERIAL. — Specimen GIT 580-8: isolated tessera or platelet. LOCALITY AND STRATIGRAPHIC HORIZON. — Same as specimens GIT n°580-1, 2, 3, 4, 6 and 7: locality (sample) 73, Tonnel’nyj Brook, south of De Long Strait, Chukotka; Lower Member (1) of Enmakaj Formation, Lochkovian. DESCRIPTION ħis specimen is an isolated square-shaped element (either a tessera or platelet), partially broken, and with an altered surface. It bears a single, probably central, star-shaped tubercle (Fig. 6I). Because it is larger ( c. 3.2 mm long for its preserved part) than all other tesserae that have been prepared from sample 73 of the Coast section, we suggest that it might correspond to a different taxon. Furthermore, with such a small sample (a single specimen), no thin section has been made, and thus its histology is not confirmed as being of a heterostracan. : 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 page 557, DOI: 10.5252/g2013n3a3, http://zenodo.org/record/5372262