tailieunhanh - The landsnail family subulinidae from Son La, Vietnam, with description of two new species

The paper provided data on the landsnail family Subulinidae in Son La province, northwestern Vietnam. A total of nine species in three genera, viz., Allopeas Baker; 1935; Prosopeas Mörch, 1876 and Tortaxis Pilsbry, 1906 were recorded. Two new species are described, namely Prosopeas muongbuensis sp. n. from Muong Bu commune, Muong La district and Tortaxis comaensis sp. n. from Co Ma commune, Thuan Chau district. | TAP CHI SINH HOC 2014, 36(4): 451-459 The landsnail family Subulinidae DOI: THE LANDSNAIL FAMILY Subulinidae (Gastropoda: Pulmonata) FROM SON LA, VIETNAM, WITH DESCRIPTION OF TWO NEW SPECIES Do Duc Sang1*, Do Van Nhuong2 1 2 Tay Bac University, *doducsangdhtb@ Faculty of Biology, Hanoi National University of Education ABSTRACT: The paper provided data on the landsnail family Subulinidae in Son La province, northwestern Vietnam. A total of nine species in three genera, viz., Allopeas Baker; 1935; Prosopeas Mörch, 1876 and Tortaxis Pilsbry, 1906 were recorded. Two new species are described, namely Prosopeas muongbuensis sp. n. from Muong Bu commune, Muong La district and Tortaxis comaensis sp. n. from Co Ma commune, Thuan Chau district. Prosopeas muongbuensis sp. n. is diagnosized by a cylindrical, medium-sized, thin, dextral, yellowish-brown shell; whorls convex and separated by an indented, relatively deep suture; callus thick and continued. Tortaxis comaensis sp. n. is recognized by a cylindrical, very large-sized, thick, yellowish-brown shell; whorls flatened and more coarsely ribbed; aperture subovate, oblique, with a thick peristome. Keywords: Subulinidae, new species, landsnail, Son La, Vietnam. INTRODUCTION The pulmonate gastropod family Subulinidae Fischer & Crosse, 1877 is widely distributed in Central and South America, Africa, Central and South Asia. Not only be found in lands, members of the family are still found in islands in the Pacific and Atlantic Oceans [12, 25]. The family Subulinidae diagnosed by shell’s size, specified cylindrical shapes, uniform colors and few decorations. They are one of the most diverse terrestrial gastropods with a wide variety of lifestyles, from ground dwelling species living hidden in the soil to tree climbing, arboreal species living in the canopy, gardens, orchards, residential areas [12]. In Vietnam, seven genera, viz., Opeas Albers, 1850; Allopeas Baker, 1935; .