Asteridiella toddaliae, Hosagoudar & Riju, 2011

Hosagoudar, V. B. & Riju, M. C., 2011, Three new fungi from Silent Valley National Park, Kerala, India, Journal of Threatened Taxa 3 (3), pp. 1615-1619 : 1615-1616

Asteridiella toddaliae sp. nov.

( Fig. 1 )

Material examined: 02.viii.2008, on leaves of Toddalia asiatica ( L.) Lam. ( Rutaceae ), Cheriavalakkad, Silent Valley National Park, Palakkad, Kerala, India, coll. M. C. Riju et al. TBGT 4513 (holotype). Part of the collection has been deposited in HCIO, New Delhi, (MycoBank # 561021).

Coloniae amphigenae, densae, velutinae, ad

Date of publication (online): 26 March 2011

Date of publication (print): 26 March 2011

ISSN 0974-7907 (online) | 0974-7893 (print)

Editor: Richard Mibey

Manuscript details:

Ms # o2641

Received 07 December 2010

Final received 10 February 2011

Finally accepted 15 February 2011

Citation: Hosagoudar, V. B. & M. C. Riju (2011). Three new fungi from Silent Valley National Park, Kerala, India. Journal of Threatened Taxa 3(3): 1615-1619.

Copyright: © V. B. Hosagoudar & M. C. Riju 2011. Creative Commons Attribution 3.0 Unported License. JoTT allows unrestricted use of this article in any medium for non-profit purposes, reproduction and distribution by providing adequate credit to the authors and the source of publication.

3mm diam., raro confluentes. Hyphae rectae, subrectae vel undulatae, plerumque opposite laxe ramosae, laxe vel arte reticulatae, cellulae 22–30 x 7–10 µm. Appressoria alternata, unilateralis, ad 10% opposita, antrorsa vel subantrorsa, raro retrorsa, 12–25 µm longa; cellulae basilares cylindraceae vel cuneatae, 2–8 µm longae; cellulae apicales ovatae, globosae, integrae, 10–18 x 7–13 µm. Phialides appressoriis intermixtae, alternatae, oppositae, ampulliformes, 15–23 x 5–8 µm. Perithecia laxe aggregata ad coloniis centre, ad 210µm diam.; cellulae peritheciales mammiformes vel conoideae, 17–28 µm longae; ascosporae oblongae vel ellipsoideae, 4-septatae, constrictus ad septatae, 45–48 x 22–25 µm.

Colonies amphigenous, dense, velvety, up to 3mm diam., rarely confluent. Hyphae straight, substraight to undulating, branching mostly opposite at wide angles, loosely to closely reticulate, cells 22–30 x 7–10 µm. Appressoria alternate, unilateral, about 10% opposite, antrorse to subantrorse, rarely retrorse, 12–25 µm long; stalk cells cylindrical to cuneate, 2–8 µm long; head cells ovate, globose, entire, 10–18 x 7–13 µm. Phialides mixed with appressoria, alternate, opposite, ampulliform, 15–23 x 5–8 µm. Perithecia loosely grouped at the centre of the colony, up to 210µm in diam.; perithecial wallcells mammiform to conoid, 17–28 µm long; ascospores oblong to ellipsoidal, 4-septate, constricted at the septa, 45–48 x 22–25 µm.

Of the known species of the genus Asteridiella on Rutaceae , Asteridiella obesa (Speg.) Hansf. var. obesula (Speg.) Hansf. and A. fagaricola (Speg.) Hansf. var. zanthoxyli Hansf. having alternate and opposite appressoria ( Hansford 1961). The present new species differs from the former taxon known on Esenbeckia latifolia from Paraguay in having perfectly rounded head cells of appressoria in contrast to rounded-angulose. It also differs from the latter taxon known on Zanthoxylum hymenale from Argentina in having only 10% opposite appressoria in contrast to 90% ( Hansford 1961). The specific epithet is derived from the host genus.

Acknowledgements: We thank the director, TBGRI, Palode for providing facilities and to Mr. T. Shaju, TBGRI, Palode for identifying the host plants.

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a - Appressorium; b - Phialide; c - Ascospores; d - Perithecial wall cells

Figures

Figure 1. Asteridiella toddaliae sp. nov.