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The database is hosted by Kiel University
and is established by Magda Wieckowska-
Lüth, Wiebke Kirleis and Kay Schmütz,
Institute for Prehistoric and Protohistoric Archaeology.

© Wieckowska-Lüth/Kirleis/Schmütz 2020

HdV-170Type: HdV-170

Category: Cyanobacteria

Taxonomical identification: Rivularia‐type

First publication: van Geel, B., Hallewas, D.P. and Pals, J.P. (1983) A Late Holocene deposit under the Westfriese Zeedijknear Enkhuizen (Prov of Noord-Holland, The Netherlands): palaeoecological and archaeological aspects. Review of Palaeobotany and Palynolynology 38, 269–335

Other publication/s:
van Geel, B., Coope, G.R. and van der Hammen, T. (1989) Palaeoecology and stratigraphy of the Late-glacial type section at Usselo (The Netherlands). Review of Palaeobotany and Palynology 60, 25–129
van Geel, B., Odgaard, B.V. and Ralska-Jasiewiczowa, M. (1996) Cyanobacteria as indicators of phosphate-eutrophication of lakes and pools in the past. Pact 50, 399–415
Carrión, J.S. and Navarro, C. (2002) Cryptogam spores and other non-pollen microfossils as sources of palaeoecological information: case studies from Spains. Annales Botanici Fennici 39, 1–14
Menozzi, B.I., Zotti, M. and Montanari, C. (2010) A non-pollen palynomorphs contribution to the local environmental history in the Ligurian Apennines: a preliminary study. Vegetation History and Archaeobotany 19, 503–512

Description: Heterocysts ellipsoid to almond-shaped; 9.7–18.4 x 6.0–13.3 µm or 9.8–12.0 x 5.6–8.1 µm; Wall ca. 1 µm thick, hyaline; The narrow truncated end of the cell with a ca. 1 µm or 0.8 µm wide pore, origirnally forming the connection with the trichome; It often bears an up to 2 µm long appendage (the sheath ofthe trichome, which did not become fossilized); Often remains of the proximal part of the gelatinous sheath still in organic connection with the heterocyst.

(Sub-) Fossil occurence: In black soil, gyttja

Co-occurence: No information

Modern occurence: No information

Palaeoenvironmental indication: Alkaline conditions (pH of 7–8.5)