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Lophodermium mahuianum P.R. Johnst. 1989

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Lophodermium mahuianum P.R. Johnst., New Zealand J. Bot. 27 259 (1989)

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P.R. Johnst.
P.R. Johnst.
1989
259
ICN
Lophodermium mahuianum P.R. Johnst. 1989
NZ holotype
species
Lophodermium mahuianum

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mahuianum

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Lophodermium mahuianum P.R. Johnst. 1989

PDD 47022 - holotype, PDD 49381, 49252, 47067 (IMI), 49382, 49251, 49053, 47384, 48451 (IMI), 48452.
Ascocarps sometimes associated with pale areas on host, never with zone lines or pycnidia. Ascocarps 0.8-1.5 x 0.4-0.8 mm, broad-elliptic or irregular in outline, ends broadly rounded. Immature ascocarps with grey to black walls, sometimes paler zone developing along future line of opening just prior to ascocarp opening. Opening slit lined with well developed yellow-brown to dark brown zone.

Ascocarps in vertical section subcuticular. Upper wall up to 150 µm wide near ascocarp opening, narrower toward outside edge of ascocarp, comprising brown to pale brown, thin to slightly thick-walled cells. Exposed face of broken upper wall lined with hyaline to brown, cylindric cells. Immediately prior to ascocarp opening a 15-20 µm wide layer of hyaline, vertically orientated cells develops near the centre of the ascocarp between the upper wall and the cuticle of the host. As ascocarps mature the cells in this layer become brown. Lower wall 25-50 µm wide, outer 1-2 rows of cells dark brown, thick-walled, inner rows of cells paler and with thinner walls.

Paraphyses 1.5-2 µm diam., circinate at apex, extending 15-25 µm beyond asci. Asci 130-175 x 9-12 µm, clavate, tapering to small, truncate apex, wall not thickened at apex, 8-spored, spores held in top third of ascus. Ascospores 35-60 x 2-2.5 µm, 0-1 septate, tapering to base, well developed gelatinous sheath.

Northland, Taupo, Wellington, Westland, Mid Canterbury.
Dead leaves of Nothofagus solandri var. cliffortioides, Podocarpus totara, P. nivalis, Halocarpus bidwillii, Phyllocladus aspleniifolius var. alpinus, Dracophyllum filifolium, Agathis australis.
Ascocarpi elliptici, atri, subcuticulares; ascocarpi ruptus paries superior cellulis cylindricis in superficie exposita. Paraphysium apex circinatus. Asci 130-175 x 9-12 µm, clavati. Ascosporae 35-60 x 2-2.5 µm.

ETYMOLOGY: mahuianum; refers to type locality.

NOTES: This species is macroscopically distinctive because of its broad, often irregularly-shaped ascocarps. The ascospores are short relative to ascus length, and the ascocarp margin is distinctive when seen in vertical section. The collections on Podocarpus nivalis (PDD 48451, 48452) have shorter ascospores (23-32 µm) than those on other hosts, but in all other respects they are indistinguishable.

TAUPO, Tongariro National Park, vic. Mahuia campsite, on Nothofagus solandri (Hook. f.) Oerst. var. cliffortioides (Hook. f.) Poole, coll. Johnston (R596) & McKenzie, 20 Nov 1984 (PDD 47022).

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Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. (1989)
Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. (1989)
Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. (1989)
Lophodermium mahuianum P.R. Johnst. 1989
Lophodermium mahuianum P.R. Johnst. (1989)

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Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Fiordland
Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Marlborough
Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Mid Canterbury
Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Nelson
Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Northland
Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Taupo
Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Wellington
Lophodermium mahuianum P.R. Johnst. 1989
New Zealand
Westland

Click to collapse Metadata Info

1cb191a9-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
16 September 1993
23 November 2012
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