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Lophodermium croesicum P.R. Johnst. 1989

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Lophodermium croesicum P.R. Johnst., New Zealand J. Bot. 27 253 (1989)
Lophodermium croesicum P.R. Johnst. 1989

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Endemic
Present
New Zealand
Political Region

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P.R. Johnst.
P.R. Johnst.
1989
253
ICN
Lophodermium croesicum P.R. Johnst. 1989
NZ holotype
species
Lophodermium croesicum

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croesicum

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Lophodermium croesicum P.R. Johnst. 1989

PDD 46946 - holotype.
Ascocarps developing in yellowish areas, sometimes associated with broad, brown zone lines. Ascocarps 1-1.6 x 0.5-0.8 mm, elliptic in outline. Immature ascocarps with black walls. Ascocarp opening lined with well-developed pale zone. Structures resembling pycnidia of Rhytismataceae associated with ascocarps, 0.2 mm diam., brown to pale brown, pustulate.

Ascocarps in vertical section subcuticular. Upper wall 10-15 µm wide near outside edge of ascocarp, up to 100 µm wide near ascocarp opening, comprising dark brown, thick-walled, 4-7 µm diam. cells. Layer of cylindric, hyaline, thin-walled, 20-45 x 3-4 µm cells developing across exposed face of broken upper wall. Lower wall 10-15 µm wide, of 3-4 rows of brown to pale brown cells.

Paraphyses 1-1.5 µm diam., circinate at apex. Asci 170-195 x 9-10.5 µm, subclavate, tapering to small, truncate apex, wall not thickened, 8-spored, spores in upper part of ascus only. Ascospores 80-105 x 2-2.5 µm, 0-1 septate, with narrow gelatinous sheath.

Pycnidia-like structures subcuticular. No conidiogenous cells or conidia seen.

Dead leaves of Coprosma cf. cheesemanii.
Ab L. atro ascis 170-195 x 9-10.5 µm, ascosporis 80-105 x 2-2.5 µm differens.

ETYMOLOGY: croesicum; refers to type locality.

In vertical section L. croesicum is indistinguishable from L. atrum and L. cf. richeae. The three species differ in the macroscopic appearance of both ascocarps and pycnidia, in the size of asci and ascospores, and in host substrate. None of the subcuticular Lophodermium spp. considered by Tehon (1935)(as Lophodermina Höhnel) match any of the New Zealand species.

BULLER, vic. Blackball, Croesus Tr., between Garden Gully and bushline, on Coprosma cf. cheesemanii W.R.B. Oliver, coll. Johnston (R660) et al., 3 May 1985 (PDD 46946).

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

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Lophodermium croesicum P.R. Johnst. 1989
New Zealand
Buller
Lophodermium croesicum P.R. Johnst. 1989
New Zealand
Nelson

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1cb1918a-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
16 September 1993
15 December 2003
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