taxonID	type	description	language	source
03F387CCA431FFE0843A11B1FEBCFCD3.taxon	description	1822. Melania granifera Lamarck, 1822, Hist. Nat. Anim. sails Vert., 6 (2): 167. 1828. Helix lineata Gray, in Wood’s Index Test. Suppl., p. 24, fig. 68. 1976. Tarebia granifera: Starmuehlner, Ann. Nat. hist. Mus. Wien., 80: 569, figs. 72 – 75, pl. 16. Material Examined: ZSI / IV / APRC / M- 438; Dibru River, Tenjum village, Pasighat; 18. xi. 2021 (2 ex). Figure 1, Coordinates: 27.993043 N; 95.341832 E, 128 m. Distribution: Native: Bangladesh; Bhutan; Cambodia; China (Guangdong, Hainan); Hong Kong; India (Andaman and Nicobar Islands, Andhra Pradesh, Assam, Bihar, Jharkhand, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Tripura, Uttar Pradesh, West Bengal); Indonesia (Papua, Sumatera); Japan; Malaysia (Peninsular Malaysia); Myanmar (Myanmar (mainland); Nepal; Philippines; Singapore; Sri Lanka; Taiwan, Province of China; Thailand; Viet Nam. Introduced: Cuba; French Polynesia; South Africa; United States; Venezuela, Bolivarian Republic of Venezuela; Madagascar; Papua New Guinea (www. iucnredlist. org). Diagnostic character: Shell elongate and conical, sculptured with either distinct spiral rows of nodules or distinct dark spiral lines with inconspicuous nodules, rather obsolete on the lower whorl, spire sharp with flat whorls, apex acute, height of body whorl more than half of the shell. IUCN Status: Least Concern (LC) Remarks: Helix lineata J. E. Gray, 1828 which was discovered for the first time in India (Ganga river) has been synonymised with Tarebia granifera (https: // www. molluscabase. org / aphia. php? p = taxdetails & id = 1572299) Two specimens were collected from the Dibru River, Pashighat, East Siang district and reporting for the first time from the state.	en	Gurumayum, Shantabala Devi (2024): Range extension of three freshwater gastropods in Arunachal Pradesh, North East India. Records of the Zoological Survey of India 124 (3): 259-264, DOI: 10.26515/rzsi/v124/i3/2024/172781, URL: https://doi.org/10.26515/rzsi/v124/i3/2024/172781
03F387CCA432FFE087E21086FA45FBF3.taxon	description	1774. Buccinum scabrum Mueller, Hisl. Yermo Terr. Fluv., 2: 136. 1973. Thiara (Thiara) scabra: Pace, Malac. Review Suppl., 1: 52, pI. 12, figs, L 2, pI. 13. 2015. Mieniplotia scabra: Bouchet & Philippe, molluscabase. org / aphia. php? p = taxdetails & id = 828967 Material examined: ZSI / IV / APRC / M- 437; Dibru River, Tenjum village. Pasighat; 18. xi. 2021 (1 ex); Figure 2. Coordinates: 27.993043 N; 95.341832 E, 128 m. Distribution: Native: Bangladesh; India (West Bengal, Uttaranchal, Uttar Pradesh, Tamil Nadu, Sikkim, Pondicherry, Maharashtra, Madhya Pradesh, Kerala, Jharkhand, West Bengal, Bihar); Indonesia (Jawa); Japan; Kenya; Malaysia (Peninsular Malaysia); Myanmar (Myanmar (mainland )); Nepal; Oman; Philippines; Tanzania, United Republic of; Thailand; Yemen; Yemen (South Yemen). Introduced: Fiji; Guam; Micronesia, Federated States of; New Caledonia; Papua New Guinea; Samoa; Solomon Islands; United States; Vanuatu, Madagascar; United Arab, Comoros; Mauritius; Réunion. Diagnostic character: Shell elongated turreted, pale brown; whorls regularly increasing in size, sutures distinct, spire as high as body whorl, whorls often shouldered above and rounded below the row of spines, shell surface with rough spiral striations, and sculptured with characteristic vertical ribs bearing conspicuous spines directed diagonally outward, on the body whorl near the umbilical region striations form strong ridges. IUCN Status: Least Concern (LC) Remarks: The species was popularly known as Thiara scabra to the Malacologist till recent times. Prof. Bouchet Philippe updated the genus of the species from Thiara Röding, 1798 to Mieniplotia Low & Tan, 2014 (molluscabase. org). A single fresh and empty whole shell was collected from the Dibru River, Pashighat, East Siang district and reported for the first time from the state. Type locality contained in India (Tranquebar, Tamil Nadu).	en	Gurumayum, Shantabala Devi (2024): Range extension of three freshwater gastropods in Arunachal Pradesh, North East India. Records of the Zoological Survey of India 124 (3): 259-264, DOI: 10.26515/rzsi/v124/i3/2024/172781, URL: https://doi.org/10.26515/rzsi/v124/i3/2024/172781
03F387CCA432FFE1842417D4FB15FAD1.taxon	description	1874. Planorbis euphraticus Mousson, J. Conchyl., 22: 44. 1834. Planorbis compressus: Hutton (nec. Michaud), J. Asiat. Soc. Beng., 3 (2): 93. Range extension of three freshwater gastropods in Arunachal Pradesh, North East India 1919. Gyraulus euphraticus: Annandale & Prashad, Rec. Indian Mus., 18: 54, fig. 7 A, 8 A. Material examined: ZSI / IV / APRC / M- 439; Lohit River, Walong near Air Field, Anjaw dist.; 26 / 11 / 2022 (8 exs.); Figure 3. Coordinates: 28.1187 N; 97.012716 E, 1112 m. Distribution: Native: Afghanistan; China; India (Bihar, Manipur, Punjab, Jharkhand, West Bengal); Iran, Islamic Republic of Iraq; Nepal; Pakistan; Saudi Arabia; Turkey; Yemen Diagnostic character: Shell minute with compressed 4 - 5 whorls, discoidal, umbilicus wide, transparent, periphery subangulate, closely and obliquely striatulate, aperture ovate, lunate. Superficially it resembles Gyraulus convexiusculus but differs in being more depressed and more strongly carinte, opaquer and more coarsely and irregularly sculptured, body whorl deviates from the spiral of the upper whorls. IUCN Status: Least Concern (LC) Remarks: A Palaearctic species. Larval forms of Echinostoma ilocanum, a trematode parasite of rats and human beings and Diplodiscus amphichrus, a common Helminth parasite of intestine and rectum of anuran amphibians were recorded from this snail species (Rao, 1989). Eight specimens were collected from Lohit River, Walong near Air Field, Aanjaw and reporting for the first time from the state. Conclusion Taxonomic classification of mollusca is still upgrading as many taxon have been renamed and rearranged and a lot more taxon have been synonymised based on new studies and findings (Bouchet et al., 2017). Considering the vastness and richness of the biodiversity of the state, still, there are still lots of chances of getting species either new to science or new records in this region. Recently Sajan, et al. (2019) recorded a land snail Oxytesta shanensis new to India from Arunachal Pradesh enriching the mollusca fauna of India. However, very few new species of the Mollusca have been reported from the northeastern region so far after the works of British India may be due to a huge “ taxonomic impediment ” to the study of Mollusca. Inventoriztion and taxonomic studies of Mollusca fauna of the state are still in a rudimentary stage. On the contrary, plenty of new land Mollusca species have been described from other Southeast Asian regions during the last decade (Clements & Tan, 2012; Maassen, 2006; Huang & Lee, 2016). If further dedicated studies on the taxonomic iventorization in this region are done, there may come up with many undescribed species considering the plentiful favourable habitat and presence of many unexplored and pristine regions.	en	Gurumayum, Shantabala Devi (2024): Range extension of three freshwater gastropods in Arunachal Pradesh, North East India. Records of the Zoological Survey of India 124 (3): 259-264, DOI: 10.26515/rzsi/v124/i3/2024/172781, URL: https://doi.org/10.26515/rzsi/v124/i3/2024/172781
