MolluscaBase source details
Yokoyama, M. (1891). On some Cretaceous fossils from Shikoku. Journal of the College of Science, Imperial University of Tokyo. 4, 357-366.
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Yokoyama, M.
1891
On some Cretaceous fossils from Shikoku
Journal of the College of Science, Imperial University of Tokyo
4, 357-366
Publication
Date
action
by
Trigonia kikuchiana Yokoyama, 1891 † accepted as Nipponitrigonia kikuchiana (Yokoyama, 1891) † (original description)
Trigonia pocilliformis Yokoyama, 1891 † accepted as Notoscabrotrigonia pocilliformis (Yokoyama, 1891) † (original description)
Trigonia rotundata Yokoyama, 1891 † accepted as Nipponitrigonia kikuchiana (Yokoyama, 1891) † (original description)
Trigonia pocilliformis Yokoyama, 1891 † accepted as Notoscabrotrigonia pocilliformis (Yokoyama, 1891) † (original description)
Trigonia rotundata Yokoyama, 1891 † accepted as Nipponitrigonia kikuchiana (Yokoyama, 1891) † (original description)
