Scutellospora hawaiiensis: A new species of arbuscular mycorrhizal fungus from Hawaii

Abstract

Scutellospora hawaiiensis, a species common in coastal sand dunes of Hawaii, is described. The pale orange-brown to red-brown spores have six walls; an outermost unit wall (1.2–2.0 μm thick) appressed to a laminated wall (0.8–2.2 μm), a coriaceous wall (2.8–4.8 μm), a new type of wall (the “notching wall”) (0.5–1.6 μm), whose broken edges consist of a series of rectangular and V-shaped notches, resembling a torn linen cloth, a coriaceous wall (2.0–3.3 μm) and a thick amorphous wall (3.0–4.0 μm, expanding up to 88 μn when crushed in acidic mountants).

Key Words:

• Gigasporaceae
• Hawaii
• sand dunes
• Scutellospora