Malacosteus Ayres, 1848

Villarins, Bárbara T., Dario, Fabio Di, Eduardo, Leandro N., Lucena-Frédou, Flávia, Bertrand, Arnaud, Prokofiev, Artem M. & Mincarone, Michael M., 2022, Deep-sea dragonfishes (Teleostei: Stomiiformes) collected from off northeastern Brazil, with a review of the species reported from the Brazilian Exclusive Economic Zone, Neotropical Ichthyology (e 220004) 20 (2), pp. 1-78 : 41

Malacosteus Ayres, 1848

Diagnosis. Malacosteus can be distinguished in the Malacosteinae by the presence of the pectoral fin; a single nostril on either side of head; snout shorter than eye diameter; chin barbel absent; serial photophores reduced in size and arranged in groups; a small postorbital organ behind eye; suborbital organ large and comma-shaped (Morrow, 1964c; Kenaley, 2007; Kenaley, Stewart, 2015g; Sutton et al., 2020). Two valid species (Fricke et al., 2022).