Archigetes (flatworm)

The genus Archigetes Leuckart, 1878 is unique among all tapeworms in that its species can mature in invertebrate hosts (Oligochaeta), in contrast to all other cestodes which have a vertebrate host. All five species were described as plerocercoids in oligochaetes, but two of them were also described as adults in cypriniform fishes.

Species
According to WoRMS, there are five valid species:
 * Archigetes brachyurus Mrázek, 1908
 * Archigetes cryptobothrius Wiśniewski, 1928
 * Archigetes iowensis Calentine, 1962
 * Archigetes limnodrili (Yamaguti, 1934) Kennedy, 1965
 * Archigetes sieboldi Leuckart, 1878