taxonID	type	description	language	source
03B20A24A501FFB1FCA0FCB6FC41FC63.taxon	materials_examined	Type species: Clausilia polydona Mabille, 1887, by original designation.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FCE5FC37FB69F803.taxon	description	(Fig. 1 B)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FCE5FC37FB69F803.taxon	materials_examined	Type locality: “ Tonkin ”. Locality data: Tam Dao N. P., rain forest, 800 – 900 m, leg. A. Napolov 1998; Tam Dao N. P., forest – 1 km NE of the centre of the resort (21.4607 ° N 105.6488 ° E), 1060 m, leg. R. Bekchiev, I. Dedov, M. Langurov & N. Simov 2023 (Fig. 2 A, B); Tam Dao N. P., forest 2.1 km north of the centre of the resort (21.4733 ° N 105.6394 ° E), 980 m, leg. R. Bekchiev, I. Dedov, M. Langurov & N. Simov 2023 (Fig. 2 C); Tam Dao N. P., forest 1.4 km north of the centre of the resort (21.4672 ° N 105.6440 ° E), 1010 m, leg. R. Bekchiev, I. Dedov, M. Langurov & N. Simov 2023.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FCE5FC37FB69F803.taxon	distribution	Distribution: The species occurs sporadically in Bac Kan, Lang Son, Thai Nguyen, Son La and Hoa Binh Provinces.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FCE5FC37FB69F803.taxon	biology_ecology	Habitat: Undisturbed forests, under and inside decaying tree trunks.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FCE5FC37FB69F803.taxon	discussion	Remark: This species was described from a gastropod material collected by Benedict Balansa in Tonkin and provided without more precise locality data (Mabille 1887 a, 1887 b). However, the species diversity of Balansa’s material suggests that all of the samples originate from the central part of Lang Son Province. So far, N. polydona is known only from Vietnam but occurrence data near the borders suggest its possible presence in Guangxi Province (China) and Houaphanh Province (Laos).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FCE5FF58FC35FC83.taxon	description	(Fig. 1 A)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FCE5FF58FC35FC83.taxon	materials_examined	Type locality: Ma Phuc Pass (Cao Bang Province). Locality data: Tam Dao N. P. (Hoang et al. 2012). Distribution: In Vietnam, this species has been known from the provinces of Cao Bang (eastern part) and Lang Son (northern part). It also occurs in the neighbouring Longzhou County, Guangxi Province (China). Habitat: Limestone cliffs. Remark: The reported occurrence record from the Tam Dao N. P. (Hoang et al. 2012) is surprising because of the relatively large distance from the hitherto known distribution area of T. giardi. Furthermore, the predominantly volcanic Tam Dao Range and some of the habitats (i. e., wastelands and farmlands) reported by Hoang et al. (2012) are not suitable for this obligate limestone-dwelling species. Therefore, this locality information needs confirmation.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB1FF26F896FECFF843.taxon	type_taxon	Type-species: Clausilia bavayi Lindholm, 1924, by original designation.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A501FFB2FCA0F876FE3EFF62.taxon	materials_examined	Type species: Clausilia philippiana Pfeiffer, 1847, by original designation.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFF38FD38FD02.taxon	description	(Fig. 1 C)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFF38FD38FD02.taxon	materials_examined	Type locality: Between Bac Kan and That Khe (Lang Son Province). Locality data: Tam Dao N. P., rain forest, 800 – 900 m, leg. A. Napolov 1998.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFF38FD38FD02.taxon	distribution	Distribution: Hanoi Municipality and Bac Kan, Lang Son, Tuyen Quang and Vinh Phuc Provinces.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFF38FD38FD02.taxon	biology_ecology	Habitat: Undisturbed forests.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFF38FD38FD02.taxon	discussion	Remark: This species is known only from a few localities in the eastern part of Northern Vietnam.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFD57FE5CFAA2.taxon	description	(Fig. 1 D)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFD57FE5CFAA2.taxon	materials_examined	Type locality: Between Son La and Van Bu (present Ta Bu, Son La Province). Locality data: Tam Dao N. P. (Hoang et al. 2012); Tam Dao N. P., rain forest, 800 – 900 m, leg. A. Napolov 1998; Tam Dao resort, yard of the hotel Quang Minh (21.4580 ° N 105.6449 ° E), 970 m, leg. R. Bekchiev, I. Dedov, M. Langurov & N. Simov 2023 (Fig. 2 D).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFD57FE5CFAA2.taxon	distribution	Distribution: Hanoi Municipality and Ha Giang, Tuyen Quang, Vinh Phuc, Son La, Thanh Hoa, Ninh Binh and Nghe An Provinces.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFD57FE5CFAA2.taxon	biology_ecology	Habitat: Various types of forest and anthropogenic environments.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFD57FE5CFAA2.taxon	discussion	Remark: All the known occurrence records of this species are from Vietnam but its distribution range may extend to neighbouring areas of Yunnan Province (China) and Houaphanh Province (Laos).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF39FA97FD01FA42.taxon	materials_examined	Type species: Clausilia corticina Pfeiffer, 1842, by subsequent designation (Martens in Albers 1860).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFA17FE66F8E2.taxon	description	(Fig. 1 E)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFA17FE66F8E2.taxon	materials_examined	Type locality: Bac Kan. Locality data: Tam Dao N. P., rain forest, 800 – 900 m, leg. A. Napolov 1998; Tam Dao N. P. (21.4553 ° N 105.6386 ° E), leg. Luong Van Hao 2006.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFA17FE66F8E2.taxon	distribution	Distribution: Bac Kan, Lang Son, Vinh Phuc, Son La and Ninh Binh Provinces.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFA17FE66F8E2.taxon	biology_ecology	Habitat: Undisturbed forests.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AFA17FE66F8E2.taxon	discussion	Remark: This species is known only from a few localities in Northern Vietnam.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AF8B7FAD4FDE2.taxon	description	(Fig. 1 F)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AF8B7FAD4FDE2.taxon	materials_examined	Type locality: “ Tonkin ”. Locality data: Tam Dao N. P., rain forest, 800 – 900 m, leg. A. Napolov 1998.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AF8B7FAD4FDE2.taxon	distribution	Distribution: This species is known to occur in eastern India (Manipur State), Myanmar (Shan State and Mandalay Region), Thailand (Tak Province), southern China (Yunnan and Guangxi Provinces) and large parts of Northern Vietnam (Ha Giang, Cao Bang, Bac Kan, Lang Son, Thai Nguyen, Vinh Phuc, Son La, Thanh Hoa and Ninh Binh Provinces).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AF8B7FAD4FDE2.taxon	biology_ecology	Habitat: Forests and cliff vegetation, as well as anthropogenic environments.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FF7AF8B7FAD4FDE2.taxon	discussion	Remark: Phaedusa lypra is one of the most widely distributed Asiatic clausiliids. Its local forms show considerable variation in size and sculpture (Szekeres et al. 2021).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FDB8FAE2FBA2.taxon	description	(Fig. 1 G)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FDB8FAE2FBA2.taxon	materials_examined	Type locality: Muong Lay (Dien Bien Province). Locality data: Tam Dao N. P., rain forest, 800 – 900 m, leg. A. Napolov 1998.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FDB8FAE2FBA2.taxon	distribution	Distribution: Hanoi Municipality and Dien Bien, Lai Chau, Lao Cai, Tuyen Quang, Bac Kan, Lang Son, Vinh Phuc, Son La and Hoa Binh Provinces.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FDB8FAE2FBA2.taxon	biology_ecology	Habitat: Forests, cliff vegetation and anthropogenic environments.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FDB8FAE2FBA2.taxon	discussion	Remark: So far, all the known localities of this species are in Vietnam. However, its range may extend to north-eastern Laos and to Yunnan Province (China).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FBF7FAEDF9C2.taxon	description	(Fig. 1 H)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FBF7FAEDF9C2.taxon	materials_examined	Type locality: Phong Tho (Lai Chau Province). Locality data: Tam Dao N. P. (Hoang et al. 2012).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FBF7FAEDF9C2.taxon	distribution	Distribution: Except for the Tam Dao record, all the known localities of P. phongthoensis are in Lai Chau and Lao Cai Provinces.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FBF7FAEDF9C2.taxon	biology_ecology	Habitat: Unknown.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4FBF7FAEDF9C2.taxon	discussion	Remark: The Tam Dao locality reported by Hoang et al. (2012) is quite far from the few other occurrences of this species in the most northwestern provinces of Vietnam. This record needs confirmation; because, as its description points out (Loosjes & Loosjes-Van Bemmel 1949), Phaedusa phongthoensis is easily confused with P. paviei.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4F997FBA9F842.taxon	description	(Fig. 1 I)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4F997FBA9F842.taxon	materials_examined	Type locality: Cai Bau Island (Quang Ninh Province). Locality data: Tam Dao N. P. (Hoang et al. 2012).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4F997FBA9F842.taxon	distribution	Distribution: Lang Son, Vinh Phuc, Quang Ninh, Hoa Binh and Ninh Binh Provinces.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4F997FBA9F842.taxon	biology_ecology	Habitat: Cliff vegetation.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A502FFB2FCF4F997FBA9F842.taxon	discussion	Remarks: This species is endemic to eastern regions of Northern Vietnam.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF26FF58FDF6FE9D.taxon	materials_examined	Type species: Clausilia porphyrostoma Bavay & Dautzenberg, 1909, by original designation.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFED8FF66FD62.taxon	description	(Fig. 1 J)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFED8FF66FD62.taxon	materials_examined	Type locality: That Khe (Lang Son Province). Locality data: Tam Dao N. P. (Hoang et al. 2012).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFED8FF66FD62.taxon	distribution	Distribution: Lao Cai, Ha Giang, Cao Bang, Tuyen Quang, Bac Kan, Lang Son, Yen Bai and Phuc Yen Provinces, as well as Guangxi Province (China).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFED8FF66FD62.taxon	biology_ecology	Habitat: Forests and areas with high ground vegetation.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFED8FF66FD62.taxon	discussion	Remarks: Selenophaedusa thatkheana is a widely distributed, morphologically diverse species (Nordsieck 2011).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFC58FE6AF99D.taxon	description	(Fig. 1 K)	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFC58FE6AF99D.taxon	materials_examined	Type locality: “ Than-moi ” (Thanh Moi; presently Lang Thanh, Lang Son Province). Locality data: Tam Dao N. P., forest 1 km NE of the centre of the resort (21.4607 ° N 105.6488 ° E), 1060 m, leg. R. Bekchiev, I. Dedov, M. Langurov & N. Simov 2023 (Fig. 2 A, B); Tam Dao N. P., forest 1 km E of the centre of the resort (21.4562 ° N 105.6519 ° E), 1150 m, leg. R. Bekchiev, I. Dedov, M. Langurov & N. Simov 2023.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFC58FE6AF99D.taxon	distribution	Distribution: Apart from its type locality, the sites in the Tam Dao N. P. are the only known occurrences of the species.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFC58FE6AF99D.taxon	biology_ecology	Habitat: Undisturbed forest, on and under tree bark, as well as in decaying wood.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF6BFC58FE6AF99D.taxon	discussion	Remarks: Our data from the Tam Dao N. P. are the only well-defined locality records of this rare endemic species of Northern Vietnam.	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
03B20A24A503FFB3FF26FCD8FD4EFC02.taxon	materials_examined	Type species: Clausilia suilla Bavay & Dautzenberg, 1909, by subsequent designation (Lindholm 1924).	en	Dedov, Ivailo, Vu, Quang Manh, Le, Chi Toan, Tra, Van Tung, Szekeres, Miklos (2025): The Clausiliidae (Gastropoda: Stylommatophora) of the Tam Dao National Park, Vietnam. Acta Zoologica Bulgarica 77 (1): 41-48, DOI: 10.71424/azb77.1.002829, URL: https://doi.org/10.71424/azb77.1.002829
