Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, Eukrohnia von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. Zoologischer Anzeiger, 34, 787–793.
History The first species of Eukrohniidae, Eukrohnia hamata, was identified by Karl Möbius in 1875. The genus was named Eukrohnia by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named Eukrohniidae by Takasi Tokioka in 1965. One of the species, Eukrohnia fowleri, is bioluminescent.Thuesen, E. V., Goetz, F. E. & Haddock, S. H. (2010). Bioluminescent organs of two deep-sea arrow worms, Eukrohnia fowleri and Caecosagitta macrocephala, with further observations on bioluminescence in chaetognaths. Biological Bulletin, 219(2), 100–111.
Species Eukrohnia bathyantarctica David, 1958David, P. (1958). A new species of Eukrohnia from the southern Ocean with a note on fertilization. Proceedings of the Zoological Society of London, 131(4), 597–606. Eukrohnia bathypelagica Alvariño, 1962Alvariño, A. (1962). Two new Pacific chaetognaths, their distribution and relationship to allied species. Bulletin of the Scripps Institution of Oceanography, 8(1), 1–50. Eukrohnia calliops McLelland, 1989McLelland, J. A. (1989). Eukrohnia calliops, a new species of Chaetognatha from the northern Gulf of Mexico with notes on related species. Proceedings of the Biological Society of Washington, 102(1), 33–44. Eukrohnia flaccicoeca Casanova, 1986Casanova, J. P. (1986). Deux nouvelles espe/'ces d'Eukrohnia (Chaetognathes) de l'Atlantique sudtropical africain. Bulletin de Muse'um National d'Histoire Naturelle, Paris, 4(8), 819–833. Eukrohnia fowleri von Ritter-Záhony, 1909 Eukrohnia hamata (Möbius, 1875)Möbius, K. (1875). Vermes. Jahresbericht der Commission zur wissenschaftlichen Untersuchung der deutschen Meere in Kiel für die Jahre 1872, 1873, 2, 153–170. Eukrohnia kitoui Kuroda, 1981Kuroda, K. (1981). A new chaetognath, Eukrohnia kitoui n. sp., from the entrance to Tokyo Bay. Publications of the Seto Marine Biological Laboratory, 26(1), 177–185. Eukrohnia macroneura Casanova, 1986 Eukrohnia minuta Silas & Srinivasan, 1969Silas, E. & Srinivasan, M. (1969). A new species of Eukrohnia from the Indian Seas with notes on three other species of Chaetognatha. Journal of the Marine Biological Association of India, 10, 1–33. Eukrohnia proboscidea Furnestin & Ducret, 1965Furnstein, M. & Ducret, F. (1965). Eukrohnia proboscidea, nouvelle espèce de Chaetognaths. Revue des Travaux de l'Institut des Pêches Maritimes, 29(3), 271–273. Eukrohnia sinica Zhang & Chen, 1983
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