-
Schlotheim in the year 1820
under the name
Hippurites mitratus. LIV.—
PYCNACTIS, MESACTIS, PHAULACTIS, GEN. NOV., AND DINOPHYLLUM, LIND. T.A.Ryder. Magazine...
-
December 2021. "Phaulactis". Fossiilid.info.
Retrieved 2019-06-09. LIV.—
PYCNACTIS, MESACTIS, PHAULACTIS, GEN. NOV., AND DINOPHYLLUM, LIND. T.A.Ryder. Magazine...
- 1866,
which he
later changed to its
current name. It was also
called Pycnactis rhizophylloides by
Ryder in his 1926 publication.
Specimens of Holophragma...
-
Psydracophyllum Pterophrentis Ptychophyllum Puanophyllum Puchastraea Pycnactis Pycnactoides Pycnolithus Pycnostylus Pyramisasteria Qianbeilites Qiannanophyllum...
- †Punctospirifer
transversus †Pustulatisporites †Pustulatisporites
crenatus †
Pycnactis †
Pycnactis tenuiseptatus Contents A B C D E F G H I J K L M N O P Q R S T U...
-
unidentified related form †Pustula wallaci**** – or
unidentified related form †
Pycnactis –
tentative report †Pycnolithus –
tentative report †Pylentonema †Pylentonema...
