1. Awasthi, D.D. and Srivastava, P., 1989. Lichen genera Brigantiaea and Letrouitia from India. Proceedings of the Indian Academy of Sciences, Plant Science, 99 (3), pp.165–177. https://doi.org/10.1007/BF03053592
2. Cui, C., Dou, M., Jiang, S. and Jia, Z., 2024. The Lichen Genus Letrouitia (Brigantiaeaceae, Ascomycota) in China. Diversity, 16 (5), 254. https://doi.org/10.3390/d16050254
3. Dutta, K., Reddy, C.S., Subrat, S. and Chandra, J., 2016. Quantification and Monitoring of Forest Cover Changes in Agasthyamalai Biosphere Reserve, Western Ghats, India (1920-2012). Current Science, 110 (4), pp.508–520. https://doi.org/10.18520/cs/v110/i4/508-520
4. Hafellner, J., 1983. Monographie der Flechtengattung Letrouitia (Lecanorales, Teloschistineae). Nova Hedwigia 35, pp. 645–729.
5. Hafellner, J., 1997. A world monograph of Brigantiaea (lichenized Ascomycotina, Lecanorales). Symbolae Botanicae Upsalienses 32, pp.35–74.
6. Hafellner, J. and Bellemère, A., 1982a. Elektronenoptische Untersuchungen an Arten der Flechtengattung Brigantiaea. Nova Hedwigia 35, pp.237–261.
7. Hafellner, J. and Bellemère, A., 1982b. Elektronenoptische Untersuchungen an Arten der Flechtengattung Letrouitia gen. nov. Nova Hedwigia 35, pp.263–312.
8. Haridas, B. and Aliyarukunju, S., 2021. New Records of Lichen Taxa from the State of Kerala, India. Cryptogam Biodiversity and Assessment, 5 (2), pp.6–14.
9. Jagadeesh Ram, T.A.M. and Mathew, G.N., 2023. The lichen genus Letrouitia in the Andaman and Nicobar Islands. Nelumbo, 65 (2), pp.92–96. https://doi.org/10.20324/nelumbo/v65/2023/173237
10. Johansson, S., Søchting, U., Elix, J.A. and Wardlaw, J., 2005. Chemical variation in the lichen genus Letrouitia (Ascomycota, Letrouitiaceae). Mycological Progress, 4, pp.139–148. https://doi.org/10.1007/s11557-006-0117-5
11. Kantvilas, G. and Elix, J.A., 2009. A new species of Brigantiaea (Brigantiaeaceae: lichenized Ascomycota) from Australia. Nova Hedwigia, 88, pp.133–137. https://doi.org/10.1127/0029-5035/2009/0088-0133
12. Kondratyuk, S.Y., Upreti, D.K., Mishra, G.K., Nayaka, S., Ingle, K., Orlov, O., Kondratiuk, A., Lokos, L., Farkas, E., Woo, J.J. and Hur, J.S., 2020. New and noteworthy lichen-forming and lichenicolous fungi 10. Acta Botanica Hungarica 62, pp.69–108. https://doi.org/10.1556/034.62.2020.1-2.6
13. Kraichak, E., Huang, J.P., Nelsen, M., Leavitt, S. and Lumbsch, T., 2018. A revised classification of orders and families in the two major subclasses of Lecanoromycetes (Ascomycota) based on a temporal approach. Botanical Journal of the Linnean Society 20, pp.1–17. https://doi.org/10.1093/botlinnean/boy060
14. Lücking, R., Hodkinson, B.P. and Leavitt, S.D., 2017. The 2016 classification of lichenized fungi in the Ascomycota and Basidiomycota – Approaching one thousand genera. Bryologist 119, pp.361–416. https://doi.org/10.1639/0007-2745-119.4.361
15. Manju, C.N., Rajesh, K.P. and Madhusoodanan, P.V., 2009. Contribution to the Bryophyte Flora of India: Agasthyamalai Biosphere Reserve in Western Ghats. Taiwania 54, pp.57–68. https://doi.org/10.6165/tai.2009.54(1).57
16. Nair, S.C., 1991. The southern western Ghats: a biodiversity conservation plan. New Delhi: Indian National Trust for Art and Cultural Heritage.
17. Narasimhan, D. and Irwin, S.J., 2017. Database on Agasthyamalai Biosphere Reserve. Tamil Nadu Environmental Information System. Available at: http://tnenvis.nic.in/
18. Shi, H., Qian, Z., Wang, X., Liu, D., Zhang, Y., Ye, X., Harada, H. and Wang, L., 2015. The Genus Letrouitia (Letrouitiaceae: Lichenized Ascomycota) New to Cambodia. Mycobiology 43, pp.163–165. https://doi.org/10.5941/MYCO.2015.43.2.163
19. Sinha, G.P., 2021. Documentation of lichen diversity in India. Indian Lichenological Society eLetter. Available at: https://www.indianlichenology.com