关键词: 华溪蟹属, 博特溪蟹属, 新种, 并殖吸虫, 中间宿主

Abstract: 【Abstract】 Objective To investigate the natural resources of the freshwater crab which can serve as the intermediate hosts of Paragonimus in Pinghe and Youxi of Fujian Province. Methods Freshwater crabs were collected. The morphological characteristics of the crabs and the habitats were observed. The crabs were dissected and examined for the presence of Paragonimus metacercariae. Results Two new species of crabs were described, named as Sinopotamon zhangzhouense sp. nov. and Bottapotamon youxiense sp. nov.. S. zhangzhouense sp. nov., holotype:♂, carapace length 35.9 mm, breadth 42.8 mm, thickness 18.6 mm, collected from Pinghe County in southwest of Fujian. （24°14.206′N, 117°12.594′E）. Distal segment of the first pleopod of male tended flattish, and showed palm nest-shaped concave, which divided into two point leafs, and longitudinal crack clearly identified in back. The end half of distal segment reversed to ventral outwardly. This species usually lived in the sluggish stream. The infection rate of Paragonimus westermani and P. cenocopiosus in S. zhangzhouense sp. nov. was 44.9%（35/78）. B. youxiense sp. nov., holotype:♂, carapace length 13.35 mm, breadth 16.63 mm, thickness 7.20 mm, collected from Youxi County in central Fujian （26°10.558′N, 118°22.012′E）. The first pleopod of male was in slightly flat shape, ample and developed, as bow-like uplift. This species usually lived in the relatively flat terrain of stream. The infection rate of P. skrjabini metacercariae in B. youxiense sp. nov. was 92.1% （58/63）. Conclusion Two new species of freshwater crabs （S. zhangzhouense sp. nov. and B.youxiense sp. nov.） serving as the intermediate hosts of Paragonimus have been described.

Key words: Sinopotamon, Bottapotamon, New species, Paragonimus, Intermediate host