Tkach Vasyl V, Snyder Scott D, Vaughan Jefferson A
Department of Biology, University of North Dakota, Grand Forks, North Dakota 58202, USA.
J Parasitol. 2009 Jun;95(3):743-6. doi: 10.1645/GE-1858.1.
Spirhapalum siamensis n. sp. obtained from the heart of the Malayan box turtle, Cuora amboinensis, from western Thailand is described. This blood fluke differs from the 2 previously known species of Spirhapalum in its larger overall body size, constricted mid-body, greater number of pre-ovarian testes, ceca that loop anteriorly from the cecal bifurcation before turning to the posterior, and the relatively smaller size of its ventral sucker. A phylogenetic analysis using molecular characters places the new species in the basal clade of tetrapod blood flukes, more derived than Spirhapalum polesianum, but less derived than Spirorchis spp.
描述了从泰国西部马来箱龟（锯缘摄龟）心脏中获得的暹罗旋宫吸虫新种。这种血吸虫与之前已知的两种旋宫吸虫不同，其整体体型更大，虫体中部缢缩，卵巢前睾丸数量更多，盲肠从盲肠分叉处向前环绕后再转向后方，腹吸盘相对较小。利用分子特征进行的系统发育分析将新物种置于四足动物血吸虫的基部类群中，比波利尼西亚旋宫吸虫进化程度更高，但比旋睾属物种进化程度更低。
