The tubeshoulders are a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

, the Platytroctidae, of marine osmeriform

Osmeriformes

Osmeriformes is an order of ray-finned fish that includes the true or freshwater smelts and allies, such as the galaxiids and noodlefishes; they are also collectively called osmeriforms. They belong to the teleost superorder Protacanthopterygii, which also includes pike and salmon, among others...

 fishes. They are found throughout the world, except for the Mediterranean sea. Tubeshoulders live at moderate depths of 300 metres (984.3 ft) to 1000 metres (3,280.8 ft), and some have light-producing organs. They are generally small to medium fish, ranging from 9 centimetres (3.5 in) to 33 centimetres (13 in) in length.

Genera and species

The family contains 39 species grouped into 13 genera:

Family Platytroctidae

• Genus Barbantus
  • Barbantus curvifrons - Palebelly searsid
  • Barbantus elongatus
• Genus Holtbyrnia
  • Holtbyrnia anomala - Bighead searsid
  • Holtbyrnia conocephala
  • Holtbyrnia cyanocephala
  • Holtbyrnia innesi - Teardrop tubeshoulder
  • Holtbyrnia intermedia
  • Holtbyrnia laticauda - Tusked tubeshoulder
  • Holtbyrnia latifrons - Streaklight tubeshoulder
  • Holtbyrnia macrops - Bigeye searsid
  • Holtbyrnia ophiocephala
• Genus Matsuichthys
  • Matsuichthys aequipinnis
• Genus Maulisia
  • Maulisia acuticeps - Sharpsnout tubeshoulder
  • Maulisia argipalla - Palegold searsid
  • Maulisia isaacsi
  • Maulisia mauli - Maul's searsid
  • Maulisia microlepis - Smallscale searsid
• Genus Mentodus
  • Mentodus bythios
  • Mentodus crassus
  • Mentodus eubranchus
  • Mentodus facilis
  • Mentodus longirostris
  • Mentodus mesalirus
  • Mentodus perforatus
  • Mentodus rostratus
• Genus Mirorictus
  • Mirorictus taningi
• Genus Normichthys
  • Normichthys herringi
  • Normichthys operosus - Multipore searsid
  • Normichthys yahganorum
• Genus Pectinantus
  • Pectinantus parini
• Genus Persparsia
  • Persparsia kopua
    Persparsia kopua
    Persparsia kopua, is a tubeshoulder of the family Platytroctidae, found around the world in the southern hemisphere between latitudes 30° S and 50° S. Its length is up to 14 cm. Persparsia kopua is a mesopelagic species....
    
    (Phillipps, 1942) - Spangled tubeshoulder
• Genus Platytroctes
  • Platytroctes apus - Legless searsid
  • Platytroctes mirus - Leaf searsid
• Genus Sagamichthys
  • Sagamichthys abei - Shining tubeshoulder
  • Sagamichthys gracilis
  • Sagamichthys schnakenbecki - Schnakenbeck's searsid
• Genus Searsia
  • Searsia koefoedi - Koefoed's searsid
• Genus Searsioides
  • Searsioides calvala
  • Searsioides multispinus