| author | date | title | journal / publication | L'Hardy J-P | 1966 | Karkinorhynchus megalopharynx n. sp. nouveau Turbellarié Calyptorhynque de la famille des Karkinorhynchidae. | Bull Soc Zool France 91(2): 179-185. |
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| Gnathorhynchidae Drepanorhynchus L'Hardy, 1963 | w | latest taxonomic authority | ||
| Karkinorhynchus (Karkinorhynchides) megalopharynx (L'Hardy, 1966) | w | primary taxonomic authority (describer) | ||
| Karkinorhynchus megalopharynx L'Hardy, 1966 | w | primary taxonomic authority (describer) | ||
| Karkinorhynchides megalopharynx (L'Hardy, 1966) | w | primary taxonomic authority (describer) | ||
| Lehardyia megalopharynx (L'Hardy, 1966) | [with synonyms] | w | primary taxonomic authority (describer) |