Observation 302919: Scytinostroma protrusum (Burt) Nakasone

Notes:
Growing on the bottom of a hardwood log. Resupinate. Dimitic. Thin walled, hylaine, dextrinoid skeletal hyphae present and dominating. Generative hyphae were difficult to find. Smooth thin-walled, basidiole-like cystidia (?) present. Basidia 4-sterigmate. 1 basidium measured with the following dimensions: 35.6 × 3.8 µm. Sterigma measured (2) between 1.8 µm and 2.2 µm. Spores hyaline, inamyloid and smooth. Spore measurements from Piximetre: 3.3 – 4.1 (4.5) × (2.3) 2.33 – 2.7 (3) µm, Q = (1.3) 1.4 – 1.5; N = 6, Me = 3.8 × 2.6 µm; Qe = 1.4
Individual spores: 3.30 × 2.33 µm, 4.15 × 2.73 µm, 3.56 × 2.64 µm, 3.26 × 2.29 µm, 3.84 × 2.67 µm, 4.52 × 3.00 µm

Species Lists

Images

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Cross section in Melzer’s at 40x
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Cross section in Melzer’s at 100x
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Skeletal hyphae at 400x in Melzer’s
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Cross section at 100x in water
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Skeletal hyphae at 400x in water
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Skeletal hyphae in Melzer’s at 400x
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Cystidia? Basidioles? at 400x in Melzer’s
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Cross section at 400x in Melzer’s showing 4-sterigmate basidia
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Cross section at 1000x in Melzer’s showing spore
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Basidia at 1000x in Melzer’s

Proposed Names

-57% (1)
Recognized by sight
57% (1)
Recognized by sight: On hardwoods. This doesn’t differ much morphologically from S. galactinum.
Used references: Julich, W., & Stalpers, J. A. (1980). The resupinate non-poroid Aphyllophorales of the temperate northern hemisphere. North-Holland Publishing Company..
Nakasone, K. K., & Micales, J. A. (1988). Scytinostroma galactinum species complex in the United States. Mycologia, 546-559.
Based on microscopic features: Dextrinoid skeletal hyphae, spore inamyloid and smooth, basidia 4-sterigmate, spore size
29% (1)
Recognized by sight: Sometimes occurs on hardwoods but only rarely
Used references: Nakasone, K. K., & Micales, J. A. (1988). Scytinostroma galactinum species complex in the United States. Mycologia, 546-559.
Julich, W., & Stalpers, J. A. (1980). The resupinate non-poroid Aphyllophorales of the temperate northern hemisphere. North-Holland Publishing Company.

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Created: 2017-12-15 23:47:05 CET (+0100)
Last modified: 2018-02-07 05:53:50 CET (+0100)
Viewed: 38 times, last viewed: 2019-03-14 01:48:47 CET (+0100)
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