Table 2 in Redescription of Aspidogaster limacoides Diesing, 1834 (Aspidogastrea: Aspidogastridae) from freshwater fishes of northern Germany

Table 2 Comparison of topographical structures of three species of Aspidogaster based on SEM
CharactersSpeciesA. limacoides Diesing 1834A. ijimai Kawamura, 1913A. conchicola Baer, 1827MouthCupshapedaCupshapedbCupshapedbDepression on neckPresentaPresentbPresentbMicroridgesNotobservedaPresentbAbsentbAlveoli54-58a58c42c114c62d46gh110i50-74efArrangement of alveoliOne alveolus on each endOne alveolus on each end, two alveoliOne alveolus on both ends, twoand four on each rowacwith two rows and four on each rowcghalveoli with two rows and four on each rowciPitsNumerousaNumerousbNumerousbjMarginal organsPresentaPresentbPresentbNumber of marginal organs if28-30aconsidering margninal organs present on each interalveolar septa26-38e 30cd24c 26gh60cPapillae-like structuresPresent and located posterior-lateral to the mouthaAbsentbAbsentbNon-ciliated bulbous papillaeAbsentaPresent and scattered over the surfacebPresent and scattered over the surfacebUniciliated sensory structuresAbsentaAbsentbPresentbjExcretory poreSub-terminalaTerminalbTerminalb
aPresent study; b Gao et al. (2003); cAtopkin et al. (2017); dPopiołek et al. (2007); eBychowsky and Bychowsky (1934); fReimer (2002); gLee et al. (2017); hSokolov et al. (2019); iBakker and Diegenbach (1974); jHalton and Lyness (1971)