Chimarra biungulata Kimmins, 1964

Pandher, Manpreet Singh, 2020, Genus Chimarra Stephens, 1829 (Insecta: Trichoptera: Philopotamidae) from Suntalekhola Biodiversity Camp, Neora Valley, National Park, West Bengal, Records of the Zoological Survey of India 120 (2), pp. 113-122 : 115-116

5. Chimarra biungulata Kimmins, 1964 ( Figs. 21-25 )

1964. Chimarra biungulata Kimmins, Bull. Brit. Mus. ( Nat . Hist.) Entomol., 15: 42.

1999. Chimarra reyangensis Ghosh & Chaudhary, Fauna of West Bengal, State fauna Series, 3 (8): 4. 2013. Chimarra dibangensis Pandher & Saini, Acta Zool. Acad.

Sci. Hung., 59 (3): 271

Material examined: India: West Bengal, Neora valley National Park, Suntalekhola Biodiversity Camp (W.B), 700 m, 27°00.789’N, 88°47.094’E, 27-ix-2018, 7♂♂, 2♀♀, Pathania & Pandher, ( ZSI) .

Additional material: Chimarra dibangensis : India: Arunachal Pradesh, Roing , 800m, 2-v-2010, 1♂, Pandher, M.S. and Parey, S.H. ( NPC) .

Chimarra reyangensis : India: West Bengal, Darjeeling , Reyang, F. R. H., 275 m; 25-iii-1973, 1♂, Sharma, H.S. & party ( ZSI) .

Diagnosis: The male genitalic structures of Chimarra biungulata in having well-developed postero-ventral process on sternum VIII, are similar to Chimarra exapia Malicky & Chantaramongkol, 1993b and C. atnia Malicky & Chantaramongkol, 1993b both reported from Thailand. But in in lateral view, inferior appendages are dorsally directed in C. biungulata and two sensilla one basal and another apical one are present on the lateral lobe of tergum X, whereas no such sensillae occurs in the related species. Furthermore, the substantial variances are evident in these species in the form of phallus, the number and shape of endothecal spines.

Distribution: Nepal and India (Arunachal Pradesh and West Bengal).

Remarks: Chimarra biungulata was described by Kimmins (1964) from Nepal, while Gosh & Chaudhary (1999) described a new species C. reyangensis from Darjeeling, West Bengal which seems to be an erroneous treatment. Similarly Pandher & Saini (2013) described C. dibangensis form Arunachal Pradesh and mistook it as a new species. The author happened to compare the types of C. reyangensis and C. dibangensis as well as freshly collected specimens from Neora Valley. All these agree in the morphological characters as well as in the shape of male genitalia with that of the C. biungulata . Hence, C. reyangensis Gosh & Chaudhary (1999) and C. dibangensis Pandher & Saini (2013) are hereby treated as synonym of C. biungulata .

Figures

Plate 3. Figures 21-28. Chimarra spp. Male genitalia. 21-25. Chimarra biungulata. 21. Lateral view, 22. Dorsal view, 23. Inferior appendage Ventral view, 24. Phallic apparatus ventral view, 25. Phallic apparatus lateral view. 26-28. C. aberrans. 26. Lateral view, 27. Dorsal view, 28. Inferior appendage Ventral view.