Heterokrohniidae is a family of sagittoideans in the order Phragmophora.
Genera Archeterokrohnia Casanova, 1986 Heterokrohnia von Ritter-Záhony, 1911von Ritter-Záhony, R. (1911). Revision der Chatognathen. Deutsche Südpolar Expedition, 1901–1903, 13, 1–71. Xenokrohnia Casanova, 1993Casanova, J. (1992). A new genus and species of deep-sea chaetognath from the Bay of Biscal with a strange ventral secretory gland. Journal of Natural History, 27(2), 445–455.
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