Studies on microphallid trematodes from China. 1. Genus Maritrema, including descriptions of four new species.
Maritrema majestova n.sp. from the intestine of Charadrius alexandrinus dealbatus in Zhankiang, Guangdong, China, differs from other species of the genus in having large eggs with shells 1.8 to 2.9 mu m thick, ovary to the right of the acetabulum, oral sucker and acetabulum nearly equal in size, and male papilla indistinct. M. macropharynga n.sp. from the intestine of C. dominicus fulvus in Beihai, Guangxi, most resembles M. macravestibulum but has a smaller body and organs, a male papilla with hooks, a shorter prepharynx and oesophagus, and vitellaria interrupted posteriorly, not anteriorly. M. papillorobusta n.sp. from the intestine of both previously mentioned hosts from Beihai is characterized by a very prominent male papilla extending beyond the lateral margin of the body and an acetabulum larger than the oral sucker. M. minuta n.sp. from the intestine of C.a. dealbatus in Beihai most resembles M. magnicirrus and M. sobolevis but differs from the former in having a smaller body, cirrus pouch and testes, oral sucker smaller than the acetabulum, vitellaria horseshoe-shaped but interrupted posteriorly, and from the latter in the presence of prostatic glands, irregular ovary dorsal to the acetabulum, male papilla robust, and vitellaria horseshoe-shaped but widely interrupted posteriorly. M. obstipum in Alcedo atthis bengalensis, M. patulus and M. subdolum in C. a. dealbatus, and M. gratiosum in C. a. dealbatus and Tringa nebularia are new records for China. M. galloprovinciale is synonymized with M. obstipum and a key to the 9 species of the genus in China is given. [From English summary.]