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 Helicogermslita gisbornia
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge)
Caption: Fig. 2 A-C, Astrocystis cyatheae, PDD 49673: A, Ascospores, the lowest immature (1st, 2nd
from type, PDD 49672); B, Ascus apical ring; C, Conidiophores and conidia on the stroma
(PDD 42074); D, H. aucklandi | 
Caption: Fig. 4 Helicogermslita gisborniae. A-E, Stromata, A-C showing young material covered with
host material, D, wood at the base (arrow); F, Vertical section of stroma, note stroma shell
and detach |
Article: Petrini, L.E. (2003). Rosellinia and related genera in New Zealand. New Zealand Journal of Botany 41(1): 71-138 (http://www.rsnz.org/publish/abstracts.php).
Description: Stromata (750)867 ± 69(1000) µm high, (750)920 ± 105(1125) µm wide (n = 10), erumpent
through the wood, covered with white or brown remnants of host epidermis, subglobose,
conical to cupulate, dark brown to black, with rugose to slightly cracked surface, solitary in
small groups. Ostioles coarsely papillate. Ectostroma 75-100 µm thick, black. Entostroma
below perithecia white to cream. Perithecia detached and collapsed in mature material. Ascus
apical rings 5.7-6.7 µm high, upper width 6.7-8.6 µm, lower width 4.8-6.7 µm (n = 10),
almost rectangular, without bulge at upper margin, upper end blurred, J+, pale blue.
Ascospores (29.7)32.7 ± 1.6(37.4) µm long, (14.4)16.7 ± 1(18.2) µm wide (n = 60), broadly
ellipsoidal, dark brown, with spiral germ slit over one and a quarter turn, with a basal, up to 3
3 µm large, semiglobose, cellular appendage.
Cultures on CMD after 36 days at 15-18°C under diffused daylight 0.7 cm diam., scant aerial
mycelium, dense, opaque, salmon-coloured with scattered, salmon-coloured sporodochial
aggregates, sterile. On PDA under same conditions 1 cm diam., salmon-coloured, felty, dense,
opaque, sterile.
Habitat: HOSTS: Beilschmiedia tawa, ?Weinmannia racemosa.
MATRIX: Decorticated, heavily decomposed wood.
Notes: ETYMOLOGY: After the province Gisborne, where both specimens were collected.
NOTES: Helicogermslita gisbornia is characterised by its large, wide, dark brown ascospores
with a spiral germ slit encircling them more than one time and with a cellular appendage.
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