We value your privacy

We use cookies and other technologies to enhance your experience, analyse site usage, help with reporting, and assist in other ways to improve the website. You can choose to allow cookies and other technologies or decline. Your choice will not affect site functionality.

Download Copy a link to this page Cite this record

Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972

Scientific name record
Names_Fungi record source
Is NZ relevant
This is the current name
This record has collections
This record has descriptions
Show more

Click to collapse Details Info

Seimatosporium leptospermi R.G. Bagn. & Sheridan, New Zealand J. Bot. 10 73 (1972)
Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972

Click to collapse Biostatus Info

Present
New Zealand
Political Region

Click to collapse Nomenclature Info

R.G. Bagn. & Sheridan
R.G. Bagn. & Sheridan
1972
73
ICN
Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972
species
Seimatosporium leptospermi
New Zealand. Exemplum in marcidis foliis Leptospermum scoparium a doctore R. W. Balhamo Collectum, Wellington Mense Nouembri anno 1965 Holotype PDD 24869, isotype DAOM 215271

Click to collapse Classification Info

Click to collapse Descriptions Info

Type: Foliicolous Fungi; Description: Conidiomata stromatic, acervular, scattered to gregarious, subepidermal becoming partly erumpent, oval to rounded, dark brown to black, 0.1–0.3 mm wide, opening by an irregular rupture of the host tissue; on both sides of leaves. Conidia needle-shaped, 4-septate, 44–73 × 3–4 μm, apical and basal cells subhyaline in the basal part, hyaline above, intermediate cells subhyaline; apical cell abruptly attenuated at the apex into a single, tubular appendage, 2–9 μm long; basal cell with an excentric, tubular, flexuous appendage, 5–11 μm long.
Distribution: Auckland, Bay of Plenty, Westland.; 1st Record: Bagnall & Sheridan (1972: as Seimatosporium leptospermi).
Significance: None.; Host(s): Leptospermum scoparium.
Specimen examined: DAOM 215271 [Paratype], Wellington, New Zealand, X1.1965, R.W. Balham.

Foliicolous. Conidiomata stromatic, acervular, amphigenous, scattered to gregarious, subepidermal in origin, innate-erumpent, oval to rounded or irregular in outline, 170-300 µm wide, 80-130 µm deep, unilocular, glabrous, dark brown to black, dehiscing by an irregular rupture of the overlying host tissue, often with the conidia extruded in long dark brown cirrhi; basal stroma 10-20 µm thick, of textura angularis, cells pale brown, smooth. Conidiophores arising from the upper cells of the basal stroma, reduced to Condiogenous cells, rarely 1-septate and branched, almost colourless, invested in mucus. Conidiogenous cells lageniform to subcylindrical, almost colourless, smooth, 7-13 X 2-3 [mean = 9.2 X 2.5] µm, with up to 5 annellations. Conidia acerose, mostly 4-septate, occasionally 3- to 5-septate, periclinal wall in the median part thicker than the transverse septa, wall smooth and slightly constricted at the septa, 44-73 X 3-4 [mean = 62 X 3.5] µm, bearing appendages; basal cell obconic with a truncate base bearing minute marginal frills and a dark attachment scar, colourless in the basal part, almost colourless above, 7-9.5 [mean = 8] µm long; 3 (or 2, or 4) median cells cylindrical, almost colourless, together (20-)24-47 [mean = 35] µm long (second cell from base 9-15 [mean = 13.2] µm, central cell 7-14 [mean = 11.4] µm, fourth cell from base 8-16 [mean = 13] µm long); apical cell conic, almost colourless in the basal part, colourless above, 12-28 [mean = 19] µm long (including appendage), abruptly attenuated at the apex into a single, unbranched, tubular appendage 2-9 µm long; basal appendage tubular, single, unbranched, attenuated, flexuous, excentric, 5-11 [mean = 8] µm long; mean conidium length/width ratio = 17.5:1.

Presumed holomorph: Discostromopsis leptospermi Swart, Trans. Br. mycol. Soc. 73: 218, 1979. Bagnall & Sheridan (1972) and Swart (1979) reported the fungus on L. juniperinum from Australia.

Known distribution: New Zealand.
Habitat: On dead leaves of Leptospermum scoparium.

Click to collapse Taxonomic concepts Info

Diploceras leptospermi (R.G. Bagn. & Sheridan) Nag Raj (1993)
Diploceras leptospermi (R.G. Bagn. & Sheridan) Nag Raj (1993)
Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972
Seimatosporium leptospermi R.G. Bagn. & Sheridan (1972)
Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972
Seimatosporium leptospermi R.G. Bagn. & Sheridan (1972)
Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972
Seimatosporium leptospermi R.G. Bagn. & Sheridan (1972)
Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972
Seimatosporium leptospermi R.G. Bagn. & Sheridan (1972)

Click to collapse Collections Info

Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972
New Zealand
Taupo
Seimatosporium leptospermi R.G. Bagn. & Sheridan 1972
New Zealand
Wellington

Click to collapse Notes Info

typification
New Zealand. Exemplum in marcidis foliis Leptospermum scoparium a doctore R. W. Balhamo Collectum, Wellington Mense Nouembri anno 1965 Holotype PDD 24869, isotype DAOM 215271

Click to collapse Metadata Info

1cb1a398-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
17 January 2025
Click to go back to the top of the page
Top