Fossil: Devonian (Webster, 2017). [details]
Fossil: Ordovician (Webster, 2017). [details]
Fossil: Ordovician-Silurian (Webster, 2017). [details]
Fossil: Mississippian (Webster, 2017). [details]
Fossil: Silurian (Webster, 2017). [details]
Fossil: Silurian-Mississippian (Webster, 2017). [details]
Fossil: Ordovician-Devonian (Webster, 2017). [details]
Fossil: Permian (Webster, 2017). [details]
Fossil: Devonian-Permian (Webster, 2017). [details]
Fossil: Cambrian or Ordovician (Webster, 2017) [details]
Fossil: Pennsylvanian-Permian (Webster, 2017). [details]
Fossil: Silurian-Devonian (Webster, 2017). [details]
Fossil: Pennsylvanian (Webster, 2017). [details]
Fossil: Carboniferous (Webster, 2017). [details]
Fossil: Mississippian-Permian (Webster, 2017). [details]
Fossil: Ordovician-Mississippian (Webster, 2017). [details]
Fossil: Devonian-Pennsylvanian (Webster, 2017). [details]
nomen nudum [details]
A nomen nudum according to Webster, 2017. [details]
Misspelled Artificioscrinus in Nomenclator Zoologicus, correct spelling given in Webster, 2017. [details]
Listed as an accepted name by Webster, 2017, however preoccupied by Asymmetrocrinus Wanner, 1937. [details]
Also as Blandicrinus Stukalina, 1977, p. 66, nomen nudum. [details]
Nomen nudum; also mis-spelled Cyclumbrella on plate explanation, p. 38 according to Webster, 2017. [details]
From Webster, 2017: Sukalina, 1986, p. 71 placed Pentapetalocrinus in synonomy of Clavaticrinus. Both genera were ... [details]
Webster (2017) states: unrecognizable, ? columnal [crinoid], Pseudocrynoidea - sponges? [details]
According to Webster, 2017, also misspelled Conspeciocrinus in Jeffords in Moore and Teichert, 1978. [details]
Author given in Webster, 2017 as Murchison. Regarded as trace fossil made by transverse motion of stem in mud; ... [details]
Proposed for conservation against Cyclocyclopa Moore, 1939 by S. K. Donovan in Bulletin of Zoological Nomenclature ... [details]
A morphogenus; listed as "nomen vetitum" (i.e. unavailable?) in Webster, 2017, however proposed for suppression in ... [details]
In subclass Camerata, order uncertain according to original describers. [details]