1834  Clymenia Münster: 67.
     1838  Endosiphonites Ansted: 416.
     1960  Costaclymenia.-Selwood: 157.
     1982  Endosiphonites (Endosiphonites).-Price: 144.
     1999  Endosiphonites.-Korn: 161.
     2002  Endosiphonites.-Korn & Klug: 263.

Type species: Endosiphonites muensteri Anstedt, 1838, p.419; M.

A:   Conch discoidal, widely umbilicate, as in Costaclymenia.
C:   No ribs, no nodes.
G:   Like Costaclymenia.

[Endosiphonites is regarded as synonym of Clymenia Münster, 1834 [written commun. Price 1985]. The holotype
E. muensteri Ansted, 1838 has been partly restored. The type species appears to be a nomen dubium.]

    Holotype: H4010 Sedgwick Museum Cambridge. Type based on a fragmentary specimen belonging to Clymenia
     (Price, written communication), genus name Endosiphonites is  n o t  available.