CATALOG OF ORIGINAL DESCRIPTIONS: Heterohelix rumseyensis Douglas 1969

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: pf_cat -> H -> Heterohelix -> Heterohelix rumseyensis
Other pages this level: H. (Chiloguembelina) pseudotessera directa, H. (Heterohelix) planeobtusa, H. dentata, H. fayose, H. ivandeklaszi, H. labellosa, H. navarroensis, H. nkporoensis, H. olssoni, H. orientalis, H. pachymarginata, H. pseudoglobulosa, H. pseudoreussi, H. robusta, H. rumseyensis, H. sphenoides, H. stenopos, H. striata aegyptiaca, H. suwalkensis, H. varsoviensis, H. virgata, H. vistulaensis

Heterohelix rumseyensis

Citation: Heterohelix rumseyensis Douglas 1969
Rank: Species
Type locality: Rumsey Hills, Colusa County, and 1 paratype Goodnow Creek, Yolo County, Great Valley, northern California
Type age (chronostrat): Campanian
Type specimens: 49089
Type repository: Berkeley, CA; University of California,

Current identification/main database link: Planoheterohelix rumseyensis (Douglas 1969)

Original Description
Test large, biserial, rapidly tapering in early portion, gently tapering to straight-sided in adult; periphery lobate throughout. Chambers subglobular, wider than high, inflated in early portion; later pairs quadrate. Sutures depressed, distinct, straight. Wall calcareous, perforate; surface costate to smooth; costae fine, longitudinal. Aperture a low arch on inner margin of last chamber, with apertural flaps along outside of arch; flaps of previous chambers observable along medial suture of last pair of chambers.


Douglas, R. G. (1969). Upper Cretaceous planktonic foraminifera in northern California. Part 1 - Systematics. Micropaleontology. 15(2): 151-209. gs


Heterohelix rumseyensis compiled by the pforams@mikrotax project team viewed: 16-4-2021

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