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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

Type: HdV-139

Category: Animalia

Sub-category: Hirudinea

Taxonomical identification: Piscicola geometra

´First publication: Pals, J.P., van Geel, B. and Delfos, A. (1980) Palaeoecological studies in the Klokkeweel bog near Hoogkarspel (prov of Noord-Holland). Review of Palaeobotany and Palynology 30, 371–418

Other publication/s: Bakker, R. and van Smeerdijk, D.G. (1982) A palaecological study of a Late Holocene section from 'Het Ilperweld', W. Netherlands. Review of Palaeobotany and Palynology 36, 95–163

Description: Reproductive structure of a leech, capsular cocoon, elliptic, bilaterally symmetric, 0.90–1.14 mm long, 0.48–0.66 mm wide, and 0.34–0.44 mm thick (the measurements of dry specimens); „Ventral“ side flat to slightly concave, lustrous; „Dorsal“ side convex, with 8–9 longitudinal ridges bearing protruding membranous rims, ridges confluent towards „base“ and ending at the „top“ around a circular pore, surface between the longitudinal ridges with irregular and less pronounced transverse ribs.

(Sub-) Fossil occurence: No information

Co-occurence: Myriophyllum, Ceratophyllum, Chara and Elodea

Modern occurence: As ectoparasites on freshwater fishes and Crustacea in turbulent water, fresh and brackish water.

Palaeoenvironmental indication: Eutrophic fresh water