Product Code Database
The Myctophiformes are an order of consisting of two families of deep-sea marine fish, most notably the highly abundant (Myctophidae). The (Neoscopelidae) contain six species in three genera, while the bulk of the family belongs to the Myctophidae, with over 30 genera and some 252 species.Nelson (2006): p.223
The scientific name ultimately derives from Ancient Greek myktér (μυκτήρ, "nose") + óphis (ὄφῖς, "serpent") + Latin forma ("external form"), the Greek part in reference to the long, slender, and heavy-headed shape of these fishes.Woodhouse (1910), Glare (1968-1982), FishBase (2006)
The order Myctophiformes is similar to the (Aulopiformes), but their pharyngobranchials and are more . It was also allied with the more advanced spiny-fin ray Teleostei (e.g. Paracanthopterygii) as "Ctenosquamata". These have a fifth upper and a third internal levator muscle to move it, and molecular data also support the long-held view that these two lineages are at least closely related. Other sources ally them with the Lampriformes, which are often placed in a monotypic superorder "Lampridiomorpha". In a similar fashion, separation of the Myctophiformes in superorder "Scopelomorpha" has been proposed. The Aulopiformes, though, are usually considered to be closer or even among the Protacanthopterygii, one of the core groups of moderately advanced teleosts. As modern taxonomy tries to avoid a profusion of small taxa, and the delimitation of the Euteleostei (Protacanthopterygii sensu stricto and their allies) versus "Ctenosquamata" such as the Paracanthopterygii remains uncertain, the systematics and taxonomy of the Myctophiformes among the teleosts are in need of further study.Nelson (2006): p.223, Diogo (2008)
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