Irenopsis trichiliae, Hosagoudar & Riju, 2010

Hosagoudar, V. B. & Riju, M. C., 2010, Meliolaceae of Kerala, India - XXX new species and new records, Journal of Threatened Taxa 2 (4), pp. 824-826 : 824-825

Irenopsis trichiliae sp. nov.

( Fig. 1)

Material examined

10.xi.2007, on leaves of Trichilia sp. (Meliaceae) , 16 th mile, Padinharathara, Wayanad, Kerala, India, coll. M. C. Riju HCIO 48177 (holotype), TBGT 2913 (isotype), (Myco Bank # 518227).

Coloniae epiphyllae, subdensae, dispersae, ad 2mm diam., confluentes. Hyphae rectae vel flexuosae, opposite vel alternatim, acuteque vel laxe ramosae, laxe vel arte reticulatae, cellulae 11-33 x 6-11 µm. Appressoria alternata, antrorsa vel subantrorsa, 13-26 µm longa; cellulae basilares cylindraceae vel cuneatae, 4-11 µm longae; cellulae apicales globosae, angularis, sublobatae vel fortiter lobatae, 8-18 x 11-18 µm. Phialides appressoriis intermixtae, oppositae vel unilateralis, ampulliformes, 17-24 x 6-9 µm. Perithecia dispersa, ad 209µm diam.; setae peritheciales 0-5 numero, rectae, simplices, ad apicem obtusae, ad 198µm longae; ascosporae cylindraceae, 4-septatae, leniter constrictus ad septatae, 37-46 x 15-18 µm.

Date of publication (online): 26 April 2010

Date of publication (print): 26 April 2010

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

Editor: Richard Mibey

Manuscript details:

Ms # o2058

Received 13 September 2008

Final revised received 24 April 2009

Finally accepted 23 February 2010

Citation: Hosagoudar, V. B. & M. C. Riju (2010). Meliolaceae of Kerala, India – XXX new species and new records. Journal of Threatened Taxa 2(4): 824-826.

Copyright: © V. B. Hosagoudar & M. C. Riju 2010. 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.

Colonies epiphyllous, subdense, scattered, up to 2µm in diam., confluent. Hyphae straight to flexuous, branching opposite to alternate at acute to wide angles, loosely to closely reticulate, cells 11-33 x 6-11 µm. Appressoria alternate, unilateral, antrorse to subantrorse, 13-26 µm long; stalk cells cylindrical to cuneate, 4-11 µm long; head cells globose, angular, sublobate to deeply lobate 8-18 x 11-18 µm. Phialides mixed with appressoria, opposite to unilateral, ampulliform, 17-24 x 6-9 µm. Perithecia scattered, up to 209µm in diameter; perithecial setae 0-5 in number, straight, simple, obtuse at the apex, up to 198µm long; ascospores cylindrical, 4-septate, slightly constricted at the septa, 37-47 x 15-18 µm.

Irenopsis chukrasiae Hosag. , I. inidica (Anahosur) Hosag. , I. murrayae Hosag. & Rajkumar are known on the members of the family Meliaceae (Hosagoudar 1996; Hosagoudar et al. 2001). Irenopsis trichiliae differs from I. chukrasiae in having only unicellular stalk cells of the appressoria and from I. indica in having straight hyphae and 0-5 perithecial setae. It also differs from I. murrayae in having angular to lobate head cells of the appressoria.

a - Appressorium; b - Phialide; c - Apical portion of the perithecial setae; d - Ascospores

Acknowledgements: We thank the Director,Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram, Kerala for the facilities. We are grateful to the Ministry of Environment and Forest, New Delhi for financial support and to the Forest Department, Govt. of Kerala for forest permission .

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al. emend. Hosag. in having strongly appressed colonies on the lower surface of the leaves and having distinctly crooked mycelium (Hosagoudar 1996).

a - Appressorium; b - Phialide; c - Apical portion of the mycelial setae; d- Ascospores