贵州陆生贝类物种多样性及地理分布

基于已有的贵州陆生贝类标本数据，结合2019年7月至2020年12月对贵阳、荔波和习水等地的调查结果，整理得出贵州陆生贝类2亚纲4目20科76属316种及亚种（含13个未定种）。从种类组成看，贵州陆生贝类以环口螺科（Cyclophoridae）种类最丰富，有16属71种；巴蜗牛科（Bradybaenidae）次之，有15属61种；树螺科（Helicinidae）和槲果螺科（Cochlicopidae）均为1属1种；优势种为洞穴恰里螺（Kaliella cavicola）、同型巴蜗牛（Bradybaena similaris）、弯倍唇螺（Diplommatina herziana）、缝合倍唇螺（Diplommatina consularis）、矮小双边凹螺（Chamalycaeus nanus）和假穴环肋螺（Plectotropis pseudopatula）。从分布上看，贵州陆生贝类以黔中中亚热带湿润溶丘山原区种类最为丰富，有17科54属170种；黔南中亚热带湿润山原斜坡中低山区和黔西南亚热带半湿润丘原中山区次之，分别有18科56属152种、17科57属150种；黔东温热湿润中低山丘陵区最少，仅有10科18属27种。贵州省不同区域物种相似性分析表明，黔南中亚热带湿润山原斜坡中低山区、黔北中亚热带湿润山原斜坡中低山区、黔西南亚热带半湿润丘原中山区陆生贝类物种组成比较相似，黔东温热湿润中低山丘陵区与其他区域种类组成相差较远。

Species Biodiversity and Geographical Distribution of Terrestrial Mollusca in Guizhou Province

There are many species of terrestrial Mollusca with rapid reproduction rates, a wide distribution range, and a large population. They are not only an important wildlife resource but also an important component of biodiversity. Previously, basic research has been conducted on the species diversity and distribution of terrestrial Mollusca in some nature reserves in Guizhou and Yunnan. The existing sample data of terrestrial Mollusca in Guizhou and survey results from Guiyang, Libo, and Xishui from July 2019 to December 2020 listed 316 species and subspecies (including 13 undefined species) belonging to two subclasses, four orders, 20 families, and 76 genera in Guizhou Province. From the perspective of species composition, the dominant family is Cyclophoridae, with 16 genera and 71 species; the second most dominant family is Bradybaenidae, with 15 genera and 61 species, followed by Helicinidae and Cochlicopidae with one genera and one species. The dominant species are Kaliella cavicola, Bradybaena similaris, Diplommatina herziana, Diplommatina consularis, Chamalycaeus nanus, and Plectotropis pseudopatula. From the perspective of geographical distribution, terrestrial Mollusca are the most abundant in the central region of Guizhou, with 17 families, 54 genera, and 170 species. The areas with the second greatest abundance of terrestrial Mollusca are the sub-subtropical humid areas in southern Guizhou and the sub-subtropical areas in southwestern Guizhou, with 18 families, 56 genera, and 152 species and 17 families, 57 genera, and 150 species, respectively. There are only 10 families, 18 genera, and 27 species in the eastern area of Guizhou. Similarity analysis of species in different regions of Guizhou Province showed that the species composition of terrestrial Mollusca in the southern area, northern area, and southwestern area of Guizhou is similar, whereas the species composition of terrestrial Mollusca in the eastern area of Guizhou is markedly different from that of other regions. This paper discusses the species and distribution pattern of terrestrial Mollusca in Guizhou Province and their resource characteristics to provide a scientific basis for the protection and rational utilization of terrestrial Mollusca resources and to further enrich the research data of terrestrial Mollusca in China.