By Frederick W. Spiegel, John D. Shadwick, Lora A. Lindley, Matthew W. Brown

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Additional info for A Beginner’s Guide to Identifying The Protostelids

Sample text

Echinostelium bisporum FF. Ceratiomyxa hemisphaerica. Scale bar = 100µm ` All the figures on the comparison plate are of sporocarps as they would appear with a 10x objective used for scanning a primary isolation plate. Remember to look for sporocarps on the agar surface surrounding a piece of substrate and fruiting out from the surface of a piece of substrate. With a little practice, one can learn to be fairly efficient at finding protostelids within a few hours and to identify them within a few days to a week.

It is better viewed from the side. Spore: spherical to ellipsoid, deciduous. Prespore Cell (PSP): not shown, circular in outline. Scale bar: 100µm Comments: When this species has been found, it has occurred on rotting wood or fairly substantial primary tissue substrates such as tree fern petioles. It is usually detected by seeing a cluster of sporocarps that radiate outward from a common base. Similar species: At first glance, an individual sporocarp looks similar to one of Protosporangium bisporum (which is not illustrated in this Guide).

Spores multiple, stalks short A B C D E Clastostelium recurvatum Olive & Stoianovitch This relatively uncommon protostelid is easy to recognize with its recurved stalk and small sporangium of two spores. It is best seen early in the morning because its spores are usually all dispersed by mid morning. Stalk: bipartite with a short, persistent, apiculate base (arrows in Fig. C) and an inflated, recurved upper portion that bursts to disperse the spores. Stalk bases seen as dark spots from above after spores dispersed (circle in Fig.

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