Studies on North American Polystomidae, Aspidogastridae, and Paramphistomidae

作者：Horace Wesley Stunkard · 发表于：Illinois biological monographs · 年份：1917 · DOI：10.5962/bhl.title.16801 · 被引用次数：13 · 研究领域：Collembola Taxonomy and Ecology Studies、Invertebrate Taxonomy and Ecology、Hemiptera Insect Studies

In 1758 Roesel von Rosenhof described and figured a "leech" from the urinary bladder of the frog.This is regarded as identical with the well known European parasite of the urinary bladder of the frog, described by Frohlich (1791) as Linguahda integerrimum.M. Braun (1792) described Planaria iniciniilata from the urinary bladder of the green water-frog and his description is so specific that there can be no doubt that he had the same form described by Frohlich the previous year.Zeder (1800) founded the genus Polystoma to contain the three species, Linguatula integerrimum Frohlich which he rechristened Poly- stoma ranae, P. serratitm, and P. pinguicola.According to Stiles and Hassall (1908) the type was clearly intended to be P. ranae = Planaria jtncinulata, and altho Braun had described the form correctly with the suckers and hooks at the posterior end of the body, Zeder erroneously stated in his characterization of the genus that the suckers were at the anterior end.P. serratum had been designated by Frohlich (1789) as type of the genus Linguatula and P. pinguicola had been designated by Treutler (1793) as type of the genus Hexathyridium.That Zeder was in error in including these species in the genus Polystoma was demonstrated by later studies.However Rudolphi (1809) retained them in the genus Polystoma and listed three other species: P. taenoides Rud., P. denticulatum, Rud., and P. venarum (Treutler 1793) Zeder 1803.Among these species, it is probable that Treutler 's descrip...