CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina ampliapertura cancellata Pessagno 1963

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 ampliapertura cancellata
Other pages this level: Globigerina (Globigerinella), G. achtschacujmensis, G. adriatica, G. aequabilis, G. aequatorialis, G. aequilateralis, G. aequilateralis involuta, G. affinis, G. alanwoodi, G. almadenensis, G. alpigena, G. altispira, G. ampliapertura, G. ampliapertura cancellata, G. anconitana, G. angipora, G. angiporoides, G. angiporoides minima, G. angulata, G. anguliofficinalis, G. antarctica, G. antillensis, G. apertura, G. applanata, G. aptica, G. aquiensis, G. arabica, G. archaeobulloides, G. ariakensis> >>

Globigerina ampliapertura cancellata

Citation: Globigerina ampliapertura cancellata Pessagno 1963
Rank: sub-species
Type locality: Puerto Rico; OP 2703: Kilometer post K256H2 on Route 132 between Ponce and Peñuelas Coordinates: 126,600 meters East; 23,050 meters North; Peñuelas Quadrangle.
Type age (chronostrat): Globorotalia opima opima assemblage zone.
Type sample (& lithostrat): Upper shale member of the Juana Diaz formation, close to its contact with the Ponce formation.
Type specimens: Plate I, figures 7-9; plate 2, figures 15- 17; : Paratypes are deposited in both the USNM and the Pessagno Collection, University of California, Davis, California.
Type repository: USNM

Linked specimens: USNM-640996 USNM-640997

Current identification/main database link: Globoturborotalita cancellata (Pessagno, 1963)


Original Description

Test  trochospiral;  spiral  side  slightly  convex;  periphery  somewhat  lobulate  and  well rounded.  Wall radial, hyaline,  perforate  with  surface  cancellate.  Cancellate  ornamentation  consisting  of polygonal frames (usually hexagonal or  pentagonal). Oval pores  set deep  within centersofframes  (text-figure 2).  Chambers spherical  initially,becoming laterally compressed  in  last  whorl.   Four  chambers in  last  whorl increasing  rapidly  in  size.  Sutures  of  spiral  side radial to  oblique.  Sutures  on  umbilical side  radial and depressed.  Umbilicus  small  and  deep.  Aperture  a  large,  round  opening; interio-marginal, umbilical,  often with a  rim  (holotype).  Direction   of  coiling  (sinistral  or  dextral) random.


Size: Maximum diameter of holotype: 0.35mm. Maximum diameter of other specimens : 0.44mm.

Extra details from original publication
Remarks: G.ampliapertura cancellata n. subsp.  differs  from  G.  ampliapertura s. s. Bolli  in its  somewhat  more  convex spiral side  and  in  its  markedly cancellate  surface.

Occurrence: In Puerto Rico this species occurs in the upper part of the Juana Diaz formation.

References:

Pessagno, E. A. (1963). Planktonic foraminifera from the Juana Díaz Formation, Puerto Rico. Micropaleontology. 9: 53-60. gs

Spezzaferri, S., Olsson, R. K., Hemleben, C., Wade, B. S. & Coxall, H. K. (2018d). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Globoturborotalita. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 8): 231-268. gs V O

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Globigerina ampliapertura cancellata compiled by the pforams@mikrotax project team viewed: 19-4-2021

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