Fig. 4 in A New Species from Mountain Forest Soils in Japan: Porosia paracarinata sp. nov., and Taxonomic Concept of the Genus Porosia Jung, 1942

Fig. 4. Keel variation in Porosia paracarinata sp. nov. A – SEM image of P. paracarinata with narrow keel; B – LM images of P. paracarinata with narrow; C – very narrow and D – almost disappearing keel. Scale bars: 50 μm.