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Perrotia gallica var. phyllocladi (Dennis) Spooner 1987

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Perrotia gallica var. phyllocladi (Dennis) Spooner 1987
Perrotia gallica var. phyllocladi (Dennis) Spooner 1987

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Endemic
Present
New Zealand
Political Region

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(Dennis) Spooner
Dennis
Spooner
1987
616
ICN
NZ
var.
Perrotia gallica var. phyllocladi

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Apothecia sparsa, erumpentia, subsessilia; disco ochraceo, 1 mm. lato; excipulo alba, pilis cylindraceis, scabriusculis, obtusis, septatis, 160 x 2.5-3 µ obtecto; asci clavati, octospori, apice rotundati jodo non tincti, 80-90 x 9 µ; ascosporae monostichae, ellipticae, hyalinae, continuae, 9-10.5 x 5-5.5 µ; paraphyses filiformes, ad apicem 2 µ crassae.
There seems to be little beyond the small size of the apothecia to differentiate this from Trichopeziza gallica (Karst. & Har.) Bond., described from an unnamed conifer in France. In view of the uncertainty regarding the substrate of the latter I have thought it advisable to provide a different specific epithet which will be clearly applicable to the New Zealand fungus, especially as the two fungi in question are literally poles asunder.
Ad corticem Phyllocladi alpini, 960 m., Arthur's Pass, Canterbury, 17.1.1956, Dingley 18990 (typus).
[Notes from Kew Type specimen, PRJ 2010] on reasonably intact bark of fallen branch. Kew also has duplicate of PDD 19377.

Perrotia gallica var. phyllocladi (Dennis) Spooner 1987

NEW ZEALAND: Canterbury, Arthur's Pass, 960 m, on bark of Phyllocladus alpinus, 17 i 1956, leg. J.M. Dingley, P.D.D. 18990 (Holotype, K); Canterbury, Arthur's Pass, an bark of Phyllocladus alpinus, 17 i 1955, leg. J.M. Dingley, P.D.D. 19377.
APOTHECIA erumpent, stipitate, gregarious or scattered. DISC 1.0-1.5 mm diam., plano-concave, pale orange, smooth, obscured by inrolled margin when dry. RECEPTACLE shallow cupulate or patellate, densely clothed with white hairs. STIPE central, cylindric, shorter than disc diam., clothed with white hairs in the upper part, dark and usually smooth at the base. HAIRS 200-250 x 3-4 µm, shorter on the stipe, hyaline, cylindric or somewhat tapered, 2-3 µm diam. at the apex, obtuse, sparsely septate, thin-walled, granulate throughout. ASCI (78-)85-93 x 8.5-9.5 µm, 8-spored, cylindric or cylindric-clavate, narrowed below into a short stipe, apex broadly rounded, thin-walled, without a visible apical pore. ASCOSPORES 8.5-11.5 x 5.0-6.0, mean 10.0 (SD 0.6) x mean 5.5 (SD 0.3) µm, hyaline, broadly ellipsoid or slightly ovate, sometimes containing guttules, non-septate, smooth, uniseriate. PARAPHYSES filiform, obtuse or slightly narrowed but not pointed at the apex, hyaline, guttulate, remotely septate, exceeding the asci by up to loom, 2.0-2.5 µm diam. SUBHYMENIUM 15-20 µm thick, composed of closely woven, hyaline hyphae 1-2 µm diam. MEDULLARY EXCIPULUM composed in the stipe of tightly interwoven hyaline hyphae 1.5-2.5 µm diam., in the receptacle radially arranged forming a layer 30-35 µm thick, narrowing upwards and not differentiated at the margin, of undulating, septate, hyaline hyphae 2-3 µm diam. lying parallel to the surface. ECTAL EXCIPULUM 60-70 µm thick at the base of the receptacle, narrowed to 30-35 µm thick at the margin, and less clearly differentiated on the stipe, composed of septate hyphae arranged at right angles to the surface, becoming irregularly interwoven towards the stipe base but in the receptacle forming rows of irregular, rounded cells up to 15 x 5 µm, with thickened, refractive walls. Towards the margin these cells become narrower and thinner walled, lying in rows curving round parallel to the surface at the margin
New Zealand. Known only from the type locality.
On bark of Phyllocladus alpinus Hook. f.

The ascus characters suggest Perrotia as an appropriate genus for this taxon and the excipular structure, closely similar to that of the type of the genus in having thick-walled, agglutinated elements arranged more or less perpendicularly to the surface, provides additional evidence for this.

The apparent lack of any distinct difference between this taxon and P. gallica suggests that they cannot be regarded as separate species. The geographical isolation and difference in host, as noted above, indicates the taxa are not identical and recognition at varietal level seems appropriate.

I have seen no material of this species which has been reported only from France. It was redescribed by Grelet (1951) and by Dharne (1965), the latter having reported the type host to be Larix decidua and cited a further collection on Abies pectinata. The New Zealand species TrichoscypheIla phyllocladi Dennis was compared with L. gallica by the author and considered to differ only in substrate and geographical distribution. The type material of T. phyllocladi indeed matches the description of L. gallica in all other respects, and there can be little doubt that they are closely related. The broadly rounded, thin-walled, undifferentiated ascus apex is characteristic of Perrotia to which genus both taxa are here considered to belong.

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Perrotia gallica var. phyllocladi (Dennis) Spooner 1987
Perrotia gallica var. phyllocladi (Dennis) Spooner (1987)
Perrotia gallica var. phyllocladi (Dennis) Spooner 1987
Perrotia gallica var. phyllocladi (Dennis) Spooner (1987)

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Perrotia gallica var. phyllocladi (Dennis) Spooner 1987
[Not available]

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1cb196c7-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
14 July 2003
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