Janua
Encyclopedia
Janua is a genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of polychaete
Polychaete
The Polychaeta or polychaetes are a class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. Indeed, polychaetes are sometimes referred to as bristle worms. More than 10,000...

s, containing the following subgenera and species:

Dexiospira Caullery & Mesnil, 1897
  • Janua ainu Uchida, 1971
  • Janua bushi (Rioja, 1942)
  • Janua ceylonica (Pillai, 1960)
  • Janua corrugata (Montagu, 1803)
  • Janua glossoeides Harris, 1968
  • Janua karaitivensis (Pillai, 1960)
  • Janua marioni (Caullery & Mesnil, 1897)
  • Janua nipponicus (Okuda, 1934)
  • Janua oshoroensis Uchida, 1971
  • Janua pagenstecheri
    Janua pagenstecheri
    Janua pagenstecheri is a species of marine polychaete. It is widely distributed around the British Isles and across north-western Europe, and has been described as "probably the commonest spirorbid in the world"....

    (de Quatrefages, 1865)
  • Janua preacuta Vine, 1972
  • Janua pusilloides (Bush, 1905)
  • Janua quasiacuta Lommerzheim, 1981
  • Janua semidentata (Bush, 1905)
  • Janua spirillum (Linnaeus, 1758)
  • Janua tricornigerus (Rioja, 1942)
  • Janua turrita Vine, 1972

Fauveldora Knight-Jones, 1972
  • Janua anticorrugata Vine, 1972
  • Janua kayi Knight-Jones, 1972

Pillaiospira
  • Janua natalensis Knight-Jones & Knight-Jones, 1974
  • Janua trifuscata Knight-Jones, 1973

Incertae sedis
Incertae sedis
, is a term used to define a taxonomic group where its broader relationships are unknown or undefined. Uncertainty at specific taxonomic levels is attributed by , , and similar terms.-Examples:*The fossil plant Paradinandra suecica could not be assigned to any...

  • Janua echinata (Wesenberg-Lund, 1953)
  • Janua formosa (Bush, 1904)
  • Janua pseudocorrugata (Bush, 1904)
  • Janua steueri (Sterzinger, 1909)
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