| author | date | title | journal / publication | Kristensen, R. M. and Nørrevang, A. | 1978 | On the fine structure of Valvognathia pogonostoma gen. et sp. n. (Gnathostomulida, Onychognathiidae) with special reference to the jaw apparatus. | Zoologica Scripta 7: 179-186. |
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