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Species Catapsydrax globiformis Blow & Banner 1962


Diagnosis / Definition:
Pearson et al. (2006):
DESCRIPTION. Type of wall: Cancellate, probably spinose, ruber/sacculifer-type wall texture. Test morphology: Low trochospiral, nearly spherical test with 3-4 chambers in the final whorl. Chambers inflated, globular, increasing rapidly in size with a large bulla that covers the umbilicus and half of the surrounding chambers, walls thickened by gametogenetic calcification; in spiral view 3'12-4 globular, embracing chambers increasing rapidly in size, sutures straight, slightly depressed; in umbilical view dominated by a large, low bulla with 3-4 small, semicircular, infralaminal apertures with a continuous, thickened imperforate rim opening onto each suture which is straight and slightly depressed; in edge view nearly circular in shape with large, slightly inflated bulla showing one small aperture opening onto the suture line. Size: Holotype maximum diameter 0.23 mm, thickness 0.20 mm.
Discussion / Comments:
Pearson et al. (2006):
DISTINGUISHING FEATURES. Catapsydrax glohjformis is distinguished from C. africanus by its nearly spherical test with thickened walls, less inflated bulla, and smaller infi-alaminal apertures. Catapsydrax howei is larger and has large circular, infralaminal apertures around its strongly inflated bulla. DISCUSSION.- This species is slightly smaller than C. ajficanus and has apparently been overlooked by most previous workers. Its thickened test suggests that it may have dwelled deeper in the water column than C. africanus. We illustrate the holotype in SEM for the first time (Pl. 5.2, Figs. 1-4). PHYLOGENETIC RELATIONSHIPS. - Catapsydrax globiformis probably evolved from C. unicavus in the late Eocene by developing a more spherical test with a large low-lying, slightly inflated bulla with multiple infralaminal apertures opening onto the suture lines. GEOGRAPHIC DISTRIBUTION.- Known from tropical to mid latitude sites. STABLE ISOTOPE PALEOBIOLOGY. No data available.
Systematics:

22
 Genus Catapsydrax
  Species Catapsydrax globiformis

35
  Ordo Foraminiferida
   Superfamilia Globigerinaceae
    Familia Globigerinidae
     Genus Catapsydrax
      Species Catapsydrax globiformis
Synonym list:
Spezzaferri & Silva (1990):
1962 Globigerinita globiformis Blow & Banner. - Blow & Banner : pl. XIV; fig. S-U
1962 Globigerinita globiformis Blow & Banner. - Blow & Banner :
1990 Catapsydrax globiformis Blow & Banner. - Spezzaferri & Silva : p.238 pl. I; fig. 2a-b
Pearson et al. (2006):
1962 Globigerinita globiformis Blow & Banner. - Blow & Banner : p.108 pl. 14, fig. S-U [Globigerapsis semi-involuta Zone, Sample FCRM 1645, Lindi, Tanzania].
1974 Catapsydrax globiformis Blow & Banner. - Fleisher : p.1016 pl. 4; fig. 6 [middle Eocene Zone E13, Site 2 19, Arabian Sea]
2001 Catapsydrax globiformis Blow & Banner. - Warraich & Ogasawara : p.44 fig. 12: 7, 8 [Zone E 10- 13, Kirthar Fm., Sulaiman Range, Pakistan]
2006 Catapsydrax globiformis Blow & Banner. - Pearson et al. : p.74 pl. 5.2; fig. 1-8 (Pl. 5.2, Figs. 1-4: new SEMs of holotype of Globigerinita globformis Blow and Banner)
Specimen:
Natural History Museum, London, Inventory number: P. 44551
References:

Blow,W.H. and Banner,F.T. (1962):
The Mid-Tertiary (Upper Eocene to Aquitanian) Globigerinaceae.
In: Fundamentals of Mid‑Tertiary Stratigraphical Correlation Eds: Eames, F.E.Banner, F.T.Blow, W.H.Clarke, W.J. p. 61‑151

Fleisher,R.L. (1974):
Cenozoic planktonic foraminifera and biostratigraphy, Arabian Sea, Deep Sea Drilling Project, Leg 23A.
In: Initial Reports of the Deep Sea Drilling Project Vol. 23 Eds: Whitmarsh, R.B.Weser, O.E.Ross, D.A. p. 1001-1072

Spezzaferri,S. and Silva,I.S.. (1990):
Oligocene planktonic foraminiferal biostratigraphy and paleoclimatic interpretation from Hole 538A, DSDP Leg 77, Gulf of Mexico . Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 83 p. 217-263

Warraich,M.Y.. and Ogasawara,K.. (2001):
Tethyan Paleocene-Eocene planktic foraminifera from the Rakhi Nala and Zinda Pir land sections of the Sulaiman Range, Pakistan . Science Reports of the Institute of Geoscience University of Tsukuba, section B Vol. 22 p. 1-59

Pearson,P.N.; Olsson,R.K.; Hemleben,C.; Huber,B.T. and Berggren,W.A. (2006):
Atlas of Eocene Planktonic Foraminifera. p. 1-513
Anonymous: Unedited TaxonConcept data
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