Pharyngostomoides, Harkema, 1942
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publication ID |
https://doi.org/ 10.1093/zoolinnean/zlab114 |
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DOI |
https://doi.org/10.5281/zenodo.7036853 |
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persistent identifier |
https://treatment.plazi.org/id/03F7830D-FF86-FFAD-FC3C-A8D1FAB9F8D9 |
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treatment provided by |
Plazi |
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scientific name |
Pharyngostomoides |
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STATUS OF PHARYNGOSTOMOIDES View in CoL
The morphological characteristics of Pharyngostomoides spp. in our material conform to the original descriptions of Ph. procyonis and Ph. ovalis ( Fig. 4E, F View Figure 4 ). Beckerdite et al. (1971) considered Ph. ovalis to be a junior synonym of Ph. procyonis . In addition, Beckerdite et al. (1971) redescribed Ph. procyonis and provided an illustration that appears remarkably similar to Ph. ovalis . Our material of Ph. procyonis and Ph. ovalis differ by 0.4% and 10% in partial sequences of 28S and cox1, respectively ( Table 2 View Table 2 ; Supporting Information, Table S1 View Table 1 ). The morphology of Ph. procyonis and Ph. ovalis most obviously differs in general body shape (spatulate in Ph. procyonis vs. oval in Ph. ovalis ), shape of prosoma (anterior end rounded in Ph. procyonis vs. anterior end square shaped in Ph. ovalis ), relative sucker sizes (oral sucker similar in size or smaller than ventral sucker in Ph. procyonis vs. oral sucker usually larger than ventral sucker in Ph. ovalis ) and egg size (egg length 82–93 µm in Ph. procyonis vs. egg length 100–115 µm in Ph. ovalis ). Considering the genetic and morphological differences listed above, we restore Ph. ovalis .
Pharyngostomoides spp. are readily distinguished from Alaria spp. based on the position of the testes (opposite in Pharyngostomoides vs. tandem in Alaria ) ( Niewiadomska, 2002; Fig. 4E, F View Figure 4 vs. Fig. 4 View Figure 4 B-D, G, H). However, our molecular phylogeny based on 28S ( Fig. 1 View Figure 1 ) positioned Ph. procyonis (type species) and Ph. ovalis among Alaria spp. , including the type species A. alata .
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