Catalog - Truncorotalia pseudocrassa hybrida

CATALOG OF ORIGINAL DESCRIPTIONS: Truncorotalia pseudocrassa subsp. hybrida Fordham 1986

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 -> T -> Truncorotalia -> Truncorotalia pseudocrassa hybrida
Other pages this level: T. crassula complanata, T. gabrieliani, T. marginodentata aperta, T. pseudocrassa hybrida, T. sphericomiozea capitona, T. tosaensis acrotenes, T. truncatulinoides nana

Truncorotalia pseudocrassa hybrida

Citation: Truncorotalia pseudocrassa subsp. hybrida Fordham 1986
Rank: sub-species
Type locality: DSDP 208-4-2 74-76 cm.
Type age (chronostrat): Base of Globorotalia truncatulinoides--G. tosaensis overlap zone; Lowermost Pleistocene.
Type specimens: UQF 72491.
Type repository: Brisbane, Australia; U Queensland Univ.

Current identification:

Original Description
Moderate in size, fairly robust; low sinistral trochospire, tight. Equatorial outline slightly lobate; lateral outline highly umbilicoconvex, dorsal side slightly elevated, ventral side moderately vaulted. Chambers angular-conical, closely appressed, 4 in final whorl; increase moderate. Dorsal view: chambers distinctly longer concentrically, flat; sutures flush, directed almost radially, curved posteriorly, quickly near periphery, nonlimbate. Ventral view: chambers vaulted; intercameral sutures slightly depressed, strongly curved posteriorly; umbilicus tight. Lateral view: dorsal face very slightly convex; periphery very sharp, very weakly keeled; ventral face strongly convex; umbilical shoulder subacutely recurved and very high; apertural and terminal faces slightly concave; aperture umbilical--extraumbilical, interiomarginal, moderately highly arched, circular. Wall densely and finely perforate, smooth; pustules sparse.

Size: Length, 280 µm; width, 250 µm; height, 210 µm.

Etymology: Latin, hybrida (f.), mongrel.

Extra details from original publication
Description based on: Common material.
Holotype fig.: Fordham 1986 Pl. 24, fig. 10.


Fordham, B. G. (1986). Miocene-Pleistocene planktic foraminifers from D.S.D.P. Sites 208 and 77, and phylogeny and classification of Cenozoic species. Queensland, Australia. 1-224. gs


Truncorotalia pseudocrassa hybrida compiled by the pforams@mikrotax project team viewed: 21-9-2021

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