CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina rubescens Hofker 1956

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 -> G -> Globigerina -> Globigerina rubescens
Other pages this level: << < G. quinqueloba, G. quinqueloba egelida, G. radians, G. regina, G. regularis, G. reticulata, G. ridenda, G. riveroae, G. roblesae, G. rohri, G. rosacea, G. rosetta, G. rotundaenana, G. rotundata, G. rotundata jacksonensis, G. rubescens, G. rubra, G. rudis, G. rugosa, G. rustica, G. sabina, G. sacculifera, G. sakitoensis, G. sallentina, G. santamariaensis, G. sastrii, G. scabrosa, G. scalena, G. schachdagica, G. scobinata, G. seminolensis> >>

Globigerina rubescens

Citation: Globigerina rubescens Hofker 1956
Rank: species
Type locality: Malaya-Indonesian Archipelago area; found in deep water.
Type age (chronostrat): Recent
Type repository: Depository not given.

Current identification/main database link: Globoturborotalita rubescens (Hofker, 1956)


Original Description
Small trochoid test, beginning with small proloculus of 10µm diameter. Chambers four in the last-formed whorl. Pores relatively small, with honeycomb structure between. Aperture open, rounded, totally umbilical and central at ventral side, relatively small, often with thickened border. Pore index 6-1. Wall of last-formed chambers reddish or pinkish.

Size: Size 0.12-0.15mm

Extra details from original publication
In many samples from the eastern part of the Malayan Archipelago a small reddish Globigerina occurs which at first glance may have been attributed to Globigerina rubra. When comparing young specimens of real Globigerina rubra from the West Indies with those small specimens from the Pacific, I found, however, that we here deal with a quite different species. Young specimens of Globigerina rubra d'Orbigny, with a diameter of test of about 0.10 mm. and a proloculus of 10µm diameter, all showed already the triloculine arrangement of the last-formed chambers; the new species from the Pacific shows four or even five chambers in the last-formed whorl.
"Globigerina rubra of full-grown size has an average diameter of 0.50 mm. The specimens from the Pacific invariably show a size of about 0.12-0.15 mm., and these adult forms never occur in the samples. The Pacific species shows an index of 6-1. The ornamentation of young Globigerina rubra is smooth, with only very few pustules between the pores; the Pacific species shows the honeycomb type.
The aperture of Globigerina rubra is a wide, arched opening in the young one, though the dorsal part of the aperture is not yet formed; the specimens from the Pacific never show indications of a dorsal aperture, whereas the aperture is much smaller and provided with a conspicuous thickened lip. All these differences enable us to create a new specific name for the Pacific species, and I therefore chose the name Globigerina rubescens. The species seems closely allied with Globigerina rubra."

References:

Hofker, J. (1956c). Foraminifera of Santa Cruz and Thatch-Island, Virginia-Archipelago West-Indies. Copenhagen Univ. Zool. Mus. Spolia (Skrifler). 15: 1-237. gs


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Globigerina rubescens compiled by the pforams@mikrotax project team viewed: 15-6-2021

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