Observation 342664: Phyllosticta Pers.

When: 2018-10-27

Collection location: Clifton, Ohio, USA [Click for map]

Who: Django Grootmyers (heelsplitter)

Specimen available

Notes:
Locally abundant on fallen Thuja occidentalis needles. Appeared to be causing a needle blight. Acervuli erumpent in needles. Conidia with a gelatinous coating and 1 tail-like appendage. Conidia measurements from Piximetre: (9.9) 10.1 – 13 (14.1) × (6.9) 7.4 – 9 (9.6) µm, Q = (1.1) 1.2 – 1.6 (1.7); N = 30, Me = 11.3 × 8.2 µm; Qe = 1.4
Individual spores: 10.54 × 8.41 µm, 12.09 × 9.01 µm, 11.00 × 8.41 µm, 14.01 × 8.34 µm, 11.03 × 7.37 µm, 11.51 × 9.62 µm, 10.98 × 7.58 µm, 10.24 × 8.16 µm, 9.89 × 8.97 µm, 10.77 × 8.64 µm, 13.02 × 8.07 µm, 14.12 × 8.49 µm, 12.45 × 9.52 µm, 13.72 × 8.31 µm, 12.11 × 8.41 µm, 9.95 × 8.97 µm, 11.89 × 7.81 µm, 11.27 × 8.67 µm, 10.30 × 8.16 µm, 11.13 × 7.95 µm, 10.01 × 7.85 µm, 10.13 × 6.86 µm, 10.87 × 7.82 µm, 10.98 × 8.82 µm, 12.00 × 7.37 µm, 10.67 × 8.33 µm, 10.42 × 7.48 µm, 12.18 × 7.67 µm, 10.32 × 7.34 µm, 10.37 × 7.49 µm

Species Lists

Images

DSC_3626 edit.JPG
DSC_3623 edit.JPG
DSC_3624 edit.JPG
20181027_160008 crop.jpg
DSC_3640 Conidia at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (2 drops.JPG
DSC_3663 Conidia in acervulus at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (2 drops.JPG
20181027_155253.jpg

Proposed Names

57% (1)
Used references: Farr, D.F., & Rossman, A.Y. Fungal Databases, U.S. National Fungus Collections, ARS, USDA. Retrieved November 4, 2018, from https://nt.ars-grin.gov/fungaldatabases/
Bissett, J., & Palm, M. E. (1989). Species of Phyllosticta on conifers. Canadian journal of botany, 67(11), 3378-3385.
Wikee, S., Lombard, L., Nakashima, C., Motohashi, K., Chukeatirote, E., Cheewangkoon, R., McKenzie, E., Hyde, K.D., & Crous, P.W. (2013). A phylogenetic re-evaluation of Phyllosticta (Botryosphaeriales). Studies in mycology.
Based on microscopic features
-29% (1)
Recognized by sight: Growing on Thuja. The spores are too wide for this species though
Used references: Bissett, J., & Palm, M. E. (1989). Species of Phyllosticta on conifers. Canadian journal of botany, 67(11), 3378-3385.
Based on microscopic features
-29% (1)
Recognized by sight: Closest match morphologically but this species is supposed to be restricted to Taxus
Used references: Bissett, J., & Palm, M. E. (1989). Species of Phyllosticta on conifers. Canadian journal of botany, 67(11), 3378-3385.
Wikee, S., Lombard, L., Nakashima, C., Motohashi, K., Chukeatirote, E., Cheewangkoon, R., McKenzie, E., Hyde, K.D., & Crous, P.W. (2013). A phylogenetic re-evaluation of Phyllosticta (Botryosphaeriales). Studies in mycology.
Based on microscopic features

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Created: 2018-11-04 18:54:12 CST (-0500)
Last modified: 2018-11-04 19:00:15 CST (-0500)
Viewed: 18 times, last viewed: 2019-08-19 16:17:56 CDT (-0400)
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