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USGS2006

Neotypes for paleocene species in the momipites-caryapollenites pollen lineage

Neotypes are designated herein for certain Paleocene species of juglandaceous pollen that were originally described in 1978. The microscope slides bearing the holotypes have been lost, eliminating the possibility of designating lectotypes and necessitating, instead, the designation of neotype specimens to stabilize the nomenclature of the species, which are biostratigraphically significant. The species for which neotypes are designated are Momipites wyomingensis, Momipites waltmanensis , Momipites ventifluminis, Momipites actinus, Momipites anellus, Momipites leffingwellii, Caryapollenites prodromus, Caryapollenites imparalis, Caryapollenites inelegans, and Caryapollenites wodehousei.

Palynology↗

USGS1978

Biostratigraphy and evolution of the Momipites‐Caryapollenites lineage in the early tertiary in the Wind River Basin, Wyoming

Sequential morphologic changes in pollen of the Momipites‐Caryapollenites lineage from Paleocene strata in the Wind River Basin of Wyoming appear to reflect evolution within the family Juglandaceae. The stratigraphic occurrence of the species within this complex permits the establishment of six biostratigraphic zones that can be correlated between outcropping and subsurface sequences within the basin and to surrounding areas. Trends involving changes in shape and size of the pollen and in structure of exine at the poles proceed from a basic form of Momipites to six other distinguishable species. The genus Caryapollenites appears to have been derived from the basic form of Momipites by changes in size and development of heteropolarity in pore position. Species of Momipites described as new are M. wyomingensis, M. waltmanensis, M. ventifluminis, M. actinus, M. anellus, and M, leffingwellii. The genus Caryapollenites is redescribed and C. prodromus, C. imparalis, C. inelegans, and C. wodehousei are described as new.

Wyoming↗