CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina calida praecalida Blow 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 -> G -> Globigerina -> Globigerina calida praecalida
Other pages this level: << < G. bulliformis, G. bulloides, G. bulloides borealis, G. bulloides bronnresigorum, G. bulloides compacta, G. bulloides cryptomphala, G. bulloides extensa, G. bulloides incrusta, G. bulloides quadripartita, G. bulloides recumbens, G. bulloides rubra pyramidalis, G. bulloides tripartita, G. butti, G. calabra, G. calida, G. calida praecalida, G. canariensis, G. carteri, G. cerroazulensis, G. chascanona, G. ciperoensis, G. ciperoensis angulisuturalis, G. ciperoensis angustiumbilicata, G. ciperoensis ottnangiensis, G. circumnodifer, G. clarae, G. clarkei, G. clippertonensis, G. coalingensis, G. colomi, G. columbae, > >>

Globigerina calida praecalida

Citation: Globigerina calida praecalida Blow 1969
Rank: sub-species
Type locality: Holotype (figs. 7, 8) and figured paratype (fig. 3) from 100-102 cm. in deep-sea sediment core LSDH 78P, taken from a depth of 3208 meters, at lat. 4031 S. , long. 1680 02' E. , Pacific Ocean
Type age: Pliocene, Zone N. 19 (= Sphaeroidinella dehiscens dehiscens - Globoquadrina altispira altispira Partial-range zone). Ranges from about the upper middle part of Zone N. 17 (Upper Miocene) to Zone N. 23 (Pleistocene)
Holotype Repository: London, UK; NHM
Type & figured specimens: PM P 49593

Linked specimens: London, UK; NHM (PM P 49593) London, UK; NHM (PM PF 49593)

Current identification/main database link: Globigerinella calida (Parker, 1962)


Original Description
The moderate size test consist of about 9-10 chambers arranged in a very low trochospire with 4 chambers present in the last whorl. The chambers are inflated, not appressed, but well separated one from the other, and they do not embrace each other to any marked extent. The intercameral sutures are distinctly depressed, incised and are radial in direction both ventrally and dorsally. The umbilicus is moderately wide, open and deep. The aperture is essentially intraumbilical but shows slight asymmetry with respect to the umbilicus in the direction of the progression of the spire. The aperture is a moderately low arch with a narrow imperforate rimlike lip. The spire is low, depressed with the earlier whorls not protruding above the level of the dorsal surfaces of the later chambers. The wall is calcareous, radial hyaline, distinctly hispid and with fine pores not densely scattered over the surface of the chambers; the pores do not open into distinct pits. The hispidity is most marked on the earlier chambers and the spire bases give rise to a weakly mamelonated test surface.

Size: Maximum diameter of holotype 0.35 mm.

Extra details from original publication
Globigerina calida praecalida differs from G. calicla calida in not possessing distinct radial elongation of any of the chambers and in having a less widely open umbilicus. The aperture does not show the same degree of approach to the extraumbilical condition as seen in G. calida calida. G. calida praecalida usually only possesses 4 chambers in the last whorl but 4 1 2 chambers may be present; the chambers of the last whorl are not so well separated as in G. calida calida and there is no clear approach to planispirality. G. calida praecalida, like G. calida calida, possesses a coiling mode which shows a rapidly opening spire with the later trochospire more lax in coiling than the earlier trochospire. These characters of the spire provide a ready distinction from G. praebulloides (s.l.). G calida praecalida also differs from G. praebulloides praebulloides in possessing very globular chambers and more deeply incised dorsal and ventral intercameral sutures. Further, the wall of G. calida praecalida possesses fine pores which do not open into distinct pits, a feature which is in contradistinction to G praebulloides (s.l.).'

References:

Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs


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Globigerina calida praecalida compiled by the pforams@mikrotax project team viewed: 13-11-2019

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