The taxonomic status of Hymenodora (Crustacea: Oplophoroidea): morphological and molecular analyses suggest a new family and an undescribed diversity deep in the sea Author Lunina, Anastasiia Author Kulagin, Dmitry Author Vereshchaka, Alexander alv@ocean.ru text Zoological Journal of the Linnean Society 2024 Zool. J. Linn. Soc. 2023-08-14 200 2 336 351 http://dx.doi.org/10.1093/zoolinnean/zlad077 journal article 296805 10.1093/zoolinnean/zlad077 a5f57d75-9b7c-46dc-b11f-ee2fc4200e29 0024-4082 11239996 E48CE650-52B3-4853-9249-D228B9E00306C Key to families of Oplophoroidea 1. Second maxilla with elongate proximal endite lacking submarginal papilla and lamina ( Fig. 7C ); first maxilliped with two-segmented endopod at least two times as long as distal endite ( Fig. 7D ).......................................... Hymenodoridae fam. nov. - Second maxilla with proximal endite bearing papilla and submarginal lamina ( Fig. 7G, H, L, M ); first maxilliped with three-segmented endopod (if two-segmented then as long as distal endite) ( Fig. 7I, N )..........................................................................2 2. Second maxilliped with distal segment subtriangular and attached diagonally to preceding segment ( Fig. 7O ) ............................................................................................................................................................ Acanthephyridae Spence Bate, 1888 - Second maxilliped with distal segment suboval and attached almost transversely to preceding joint ( Fig. 7J ) ........................... .............................................................................................................................................................................. Oplophoridae Dana, 1852