HdV-18

Taxonomical Group

Fungi

Type description

van Geel 1978: Ascospores one-septate (35)37-43(48) x (10)11-14(17) μm. At both ends with 0.8 μm wide pores. Septum often no longer attached to the spore wail (artefact of preparation or due to poor preservation?). Rather pale, non-septate spores were sometimes found (Type 18B: Van Geel, 1972) together with Type 18A spores in the same fruit-bodies, probably fossilised before maturation. Fruit-bodies ostiolate, 125-450 μm in diameter; wail 7-10 μm thick, outer layer composed of interwoven, 2-4 μm wide, septate hyphae. Fruit-bodies immersed in long, cylindrical, hyaline pieces of a host plant which usually measure 70-125 μm in diameter, but where the tissue is infected by the fungus and fruit-bodies are present, this tissue has a diameter of 220-500 μm. The cylindrical cells of the host tissue measure 10-20 x 35-70 μm. Through the host tissue and the fruit-body walls the ascospores can be observed, and most of the fossil fruit-bodies still contain ascospores.

Records

First publication

van Geel B (1978) A palaeoecological study of Holocene peat bog sections in Germany and the Netherlands, based on the analysis of pollen, spores and macro- and microscopic remains of fungi, algae cormophytes and anymals. Rev. Palaeobot. Palynol. 25:1-120.