Go to Landcare Research home page
 
Home About Mushrooms Simple key Genus (A-Z) Help

« Back

Go to the NZFungi website for more indepth information on Helicogermslita johnstonii. Helicogermslita johnstonii

Biostatus

Present 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. 5 Helicogermslitsa johnstonii. A-E, Stromata, B showing host material covering young stroma, D, , stromata breaking out of wood; F, Vertical section of stroma, note host material covering
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. 5 Helicogermslitsa johnstonii. A-E, Stromata, B showing host material covering young stroma, D, , stromata breaking out of wood; F, Vertical section of stroma, note host material covering
 

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 (500)688 ± 119(850) µm high, (700)775 ± 104(1000) µm wide (n = 10), emerging gradually from the wood, initially covered by host material, later free, base often immersed, semiglobose, conical to pear-shaped, black, solitary or in small groups, sometimes fused together. Ostioles coarsely papillate or poorly differentiated, then stromata with bluntly rounded apex. Ectostroma 75-100 µm thick, black. Entostroma not formed. Perithecia immersed directly in the host material, detached and collapsed in mature material. Ascus apical rings 5-6 µm high, upper width 5-6 µm, lower width 4-5 µm (n = 5), almost rectangular, without bulge at upper margin, upper end blurred, J+, blue. Ascospores (22.5)26 ± 2(32) µm long, (9.5)11.5 ± 8(14) µm wide ( n = 60), ellipsoidal, dark brown with spiral germ slit over one turn, occasionally with one up to 1 x1 µm, semiglobose, cellular appendage. Anamorph not known.
Habitat: HOSTS: Coprosma sp., ?Dracophyllum longifolium.
MATRIX: Decorticated, heavily decomposed wood.
Notes: ETYMOLOGY: In honour of the New Zealand mycologist P. R. Johnston, who collected three specimens of this species.
NOTES: Helicogermslita johnstonii is characterised by ascospores with a coiled germ slit making about one turn. It has smaller ascospores with a less coiled germ slit than H. gisbornia and larger ascospores with a germ slit definitely more coiled than that found in H. mackenziei.
Helicogermslita gaudefroyi (H.Fabre) Læssøe & Spooner has larger stromata, smaller ascospores, less coiled germ slits; Anthostomella calligoni Frolov has a more coiled germ slit than H. johnstonii (Petrini et al. 1987; Læssøe & Spooner 1994; L. E. Petrini unpubl. data).