CATALOG OF ORIGINAL DESCRIPTIONS: Truncorotalia crassula subsp. complanata 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 crassula complanata
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 crassula complanata

Citation: Truncorotalia crassula subsp. complanata Fordham 1986
Rank: sub-species
Type locality: DSDP 208-7-4 74-76 cm.
Type age (chronostrat): Globorotalia crassaformis zone; upper-lower or lower-upper Pliocene.
Type specimens: UQF 72482.
Type repository: Brisbane, Australia; U Queensland Univ.

Current identification:

Original Description
Moderate in size, robust; low sinistral trochospire, tight. Equatorial outline oval, weakly lobate; lateral outline umbilicoconvex, dorsal side flat, ventral side moderately vaulted. Chambers angular-conical, closely appressed, 4 in final whorl; increase moderate. Dorsal view: chambers distinctly longer concentrically, flat; sutures flush; intercameral sutures directed radially or posteriorly and quickly curved posteriorly close to periphery. Ventral view: chambers vaulted; intercameral sutures shallow, sinuous to radial, meeting at slightly open umbilicus. Lateral view: keeled periphery; ventral face slightly convex; umbilical shoulder high, quickly recurved, but rounded; apertural face reclined; aperture an umbilical--extraumbilical interiomarginal low slit, slightly higher near periphery. Wall densely and finely perforate, sparsely to densely pustulose, early chambers obscured dorsally by thickening.

Size: Length, 470 µm; width, 425 µm; height, 300 µm.

Etymology: Latin, complanatus, flattened.

Extra details from original publication
Description based on: Common material.
Holotype fig.: Fordham 1986 Pl. 24, fig. 1.


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 crassula complanata compiled by the pforams@mikrotax project team viewed: 30-7-2021

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