Bolek Matthew G, Snyder Scott D, Janovy John
School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
J Parasitol. 2009 Jun;95(3):665-8. doi: 10.1645/GE-1953.1.
Morphological characters used to differentiate North American bladder flukes, Gorgoderina spp., are problematic and different authors use different morphological characteristics for distinguishing species. More importantly, no type specimens exist for 4 of the 12 North American species infecting anuran and caudatan hosts. A redescription of Gorgoderina attenuata (Stafford, 1902) Stafford, 1905 is based on new collections from 6 species of anurans from Arkansas, Nebraska, New York, and Wisconsin. Morphological comparisons between gravid G. attenuata recovered from bullfrogs and northern leopard frogs indicated statistically significant differences in 11 of 28 morphological characters examined. However, there was overlap among all of these characters, and it is unclear whether these morphological types represent host-induced morphological changes in worm morphology or cryptic species. Based on our findings, we suggest that morphological and molecular data from G. attenuata-like worms recovered from the other 23 definitive hosts reported for G. attenuata need to be collected to resolve this issue.
用于区分北美膀胱吸虫（Gorgoderina属）的形态特征存在问题，不同作者使用不同的形态特征来区分物种。更重要的是，在感染无尾目和有尾目宿主的12种北美物种中，有4种没有模式标本。对纤细膀胱吸虫（Gorgoderina attenuata，Stafford，1902年；Stafford，1905年）的重新描述基于从阿肯色州、内布拉斯加州、纽约州和威斯康星州的6种无尾目动物新采集的样本。从牛蛙和北美豹蛙体内采集到的成熟纤细膀胱吸虫之间的形态学比较表明，在检查的28个形态特征中有11个存在统计学上的显著差异。然而，所有这些特征之间存在重叠，目前尚不清楚这些形态类型是代表宿主诱导的蠕虫形态变化还是隐存种。基于我们的研究结果，我们建议收集从纤细膀胱吸虫的其他23种终末宿主中采集到的类似纤细膀胱吸虫的蠕虫的形态学和分子数据，以解决这个问题。
