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Oehl, Fritz , Andres Wiemken & Ewald Sieverding. Glomus spinuliferum, a new ornamented species in the Glomales. Mycotaxon 86: 157 - 162. 2003.

ABSTRACT: Glomus spinuliferum forms globose to subglobose, dark yellow to orange brown spores in the soil and occasionally in roots of plants. Spores are 110-154 mm broad and have one wall consisting of 4 layers. The outer wall layer is hyaline and 1-2 mm thick. It may occasionally swell up to 50 mm in mounting media containing lactic acid. Wall layer 2 is very thin and hyaline and densely packed with spines up to 2 mm long which grow into wall layer 1. Wall layer 2 is tightly attached to layer 3, which is dark yellow to orange brown, laminated, and (6-)9-15 mm thick. The thin wall layer 4 is semi-flexible, hyaline to dark yellow and sometimes hard to see. The pore of the spore is often open but usually closed by wall layer 4 or by wall thickening of layer 3 and occasionally by a bridging septum originating from the laminated layer. The hyphal attachment is 8-15 mm broad, having several septae at some distance from the spore base. The new species is the second Glomalean fungus - after G. caesaris - that has been newly described from the nature reserve Kaiserstuhl in Germany.




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