On the Oxfordian genus Subdiscosphinctes Malinowska, 1972, and subgenus S. (Aureimontanites) nov. (Perisphinctidae, Ammonoidea)
Wojciech Brochwicz-Lewiński
Acta Palaeontologica Polonica 20 (1), 1975: 87-96
Middle Oxfordian forms resembling Lithacoceras Hyatt, 1900, are placed in Subdiscosphinctes Malinowska, 1972. The type species of the latter, Perisphinctes kreutzi Siem., does not represent immature macroconch but rather microconch. Therefore, Subdiscosphinctes (Subdiscosphinctes) Malinowska is interpreted as subgenus comprising microconchs only, and a new subgenus, (Aureimontanites) nov. is proposed for macroconchs.
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