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Table 1 Summary of the nomenclatural availability of the genus Polyptychoceras and 18 related taxa

From: Nomenclatural review of Polyptychoceras and 18 related taxa (Ammonoidea: Diplomoceratidae)

Name, author(s), date of publication

Availability

Remark

Family-group name

 Polyptychoceratinae Matumoto, 1938

Available

 

Genus-group names

 Polyptychoceras Yabe, 1927

Available

 

 Subptychoceras Shimizu, 1935

Available

 

 Dihamites Matsumoto, 1977

Available

 

 Heteroptychoceras Matsumoto, 1977

Available

 

Species-group names

 Polyptychoceras vancouverense (Whiteaves, 1879)

Available

 

 Po. pseudogaultinum (Yokoyama, 1890)

Available

 

 Po. subquadratum (Yokoyama, 1890)

Available

Junior subjective synonym of Po. pseudogaultinum

 Po. haradanum (Yokoyama, 1890)

Available

 

 Po. subundulatum (Yokoyama, 1890)

Available

 

 Po. subundatum

Unavailable

Unjustified emendation by Matsumoto et al. (1963)

 Po. obstrictum (Jimbō, 1894)

Available

 

 Po. yabei (Nagao, 1931)

Available

 

 Po. mihoense Shimizu, 1935

Available

 

 Po. yubarense (Shimizu, 1935)

Available

 

 Po. jimboi

Unavailable

nomen nudum proposed by Matumoto (1938)

 Po. obiraense (Matsumoto, 1977)

Available

 

 Po. obatai (Matsumoto, 1977)

Available

 

 Po. sakhalinum Alabushev and Wiedmann, 1997

Available

 
  1. Seventeen names are available, whereas two names are unavailable