FIG. 4. — Drawings made after SEM photos from Figures 2 and 3 in Silurian and Lower Devonian anaspids (Agnatha) from Severnaya Zemlya (Russia)

• Main Author: Märss, Tiiu
• Format: Other/Unknown Material
• Language: unknown
• Published: 2002
• Subjects: Biodiversity; Taxonomy; Severnaya Zemlya; Pioneer Island; October Revolution Island
• Online Access: https://zenodo.org/record/5374655; https://doi.org/10.5281/zenodo.5374655

FIG. 4. — Drawings made after SEM photos from Figures 2 and 3 to illustrate different sculptures of birkeniids of the region; A-C, Birkenia? sp.; D, Birkeniida sp. C; E, G, Birkeniida sp. C1; F, I, Birkeniida sp. C?; H, Birkeniida sp. D; J, Birkeniida sp. F?; K, Birkeniida sp. G; L, Birkeniida sp. H...