pforams@mikrotax - Chiloguembelinidae pforams@mikrotax - Chiloguembelinidae


Classification: pf_cenozoic -> Guembelitrioidea -> Chiloguembelinidae
Sister taxa: Cassigerinellidae, Chiloguembelinidae, Guembelitriidae, Heterohelicidae
Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Test subtriangular in outline, biserial throughout or rarely with multiserial final chambers; aperture a simple arched opening at base of the final chamber, with a narrow rim on one margin and a broad collar or flange directed toward one of the flat sides of the test, lacking an infolded margin or internal plate. Rarely with multiple apertures.


Citation: Chiloguembelinidae Reiss, 1963
taxonomic rank: Family
Taxonomic discussion: Now that Streptochilus is assigned to the Bolivinidae (Chapter 19, this volume), the Family Chiloguembelinidae includes only the genus Chiloguembelina. As described by Reiss (1963) the family is defined by the biserial chamber arrangement around an elongated axis, a test that is usually twisted, having a single, interiomarginal asymmetrical aperture with a low to high arch and bordered by an asymmetrically situated flap. Reiss (1963) originally assigned Chiloguembelina and Zeauvigerina to the Chiloguembelinidae. Huber and Boersma (1994) investigated Late Cretaceous zeauvigerinids and concluded that these two groups are not phylogenetically related and Zeauvigerina was assigned to the Heterohelicoidea (Huber and others, 2006).

The Family Chiloguembelinidae evolved in the earliest Paleocene (Zone Pα) from Guembelitria cretacea via Woodringina claytonensis (Olsson and others, 1999, and references therein) and probably gave rise to the Cassigerinellidae (Chapter 18, this volume). Brönnimann and Resig (1971) described the genus Streptochilus, which is distinguished from Chiloguembelina by the presence of an internal toothplate connecting successive foramina (Poore and Gosnell, 1985), a prominent extension of an apertural collar, and a smooth to granular rather than pustulose to costate surface texture (Huber and others, 2006). Many authors (Brönnimann and Resig, 1971; Resig and Kroopnick, 1983; Poore and Gosnell, 1985), assumed that this planktonic genus evolved from Chiloguembelina. Huber and others (2006) included the Genus Streptochilus in the Family Chiloguembelinidae and assumed that Streptochilus was derived from Chiloguembelina during the middle Eocene. Recent molecular studies imply that the Chiloguembelinidae are not related to the biserial genus Streptochilus, which is genetically close to the benthic foraminiferal taxon Bolivina (Darling and others, 2009; Smart and Thomas, 2006, 2007, Chapter 19, this volume). [Premec Fucek et al. 2018]

Catalog entries: Chiloguembelinidae

Distinguishing features:
Parent taxon (Guembelitrioidea): Biserial, enrolled biserial and triserial taxa. Wall microperforate.
This taxon: Small biserial test, often with a slightly twisted coiling axis. Intercameral sutures distinct, depressed, and often somewhat oblique. Aperture arched, rimmed by narrow lip, and generally infolded on one side of ultimate chamber.

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.


Biogeography and Palaeobiology

Most likely ancestor: Benthic origins - at confidence level 3 (out of 5). Data source: Chiloguembelina is thought to have evolved from Woodringina. .

See also: Streptochilus - genus previously included in this family but now regarded as a polyphyletic group derived from the benthic foram Bolivina;

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of O5 zone (100% up, 26.9Ma, in Chattian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Pa zone (65.72-66.00Ma, base in Danian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

Primary source for this page: Huber et al. 2006 - Eocene Atlas, chap. 16, p. 472


Brönnimann, P. & Resig, J. (1971). A Neogene globigerinacean biochronologic time-scale of the southwestern Pacific. Initial Reports of the Deep Sea Drilling Project. 7(2): 1235-1469. gs O

D'Hondt, S. L. (1991). Phylogenetic and stratigraphic analysis of earliest Paleocene biserial and triserial planktonic foraminifera. Journal of Foraminiferal Research. 21: 168-181. gs

Darling, K. F., Thomas, E., Kasemann, S. A., Seears, H. A., Smart, C. W. & Wade, C. M. (2009). Surviving mass extinction by bridging the benthic/planktic divide. Proceedings of the National Academy of Sciences, USA. 106: 12629-12633. gs

Huber, B. T. & Boersma, A. (1994). Cretaceous origination of Zeauvigerina and its relationship to Paleocene biserial planktonic foraminifera. Journal of Foraminiferal Research. 24: 268-287. gs

Huber, B. T., Olsson, R. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene microperforate planktonic foraminifera (Jenkinsina, Cassigerinelloita, Chiloguembelina, Streptochilus, Zeauvigerina, Tenuitella, and Cassigerinella) and Problematica (Dipsidripella). In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 16): 461-508. gs O

Li, Q. & Radford, S. S. (1991). Evolution and biogeography of Paleogene microperforate planktonic foraminifera. Palaeogeography Palaeoclimatology Palaeoecology. 83: 87-115. gs

Liu, C. & Olsson, R. K. (1992). Evolutionary radiation of microperforate planktonic foraminifera following the K/T mass extinction event. Journal of Foraminiferal Research. 22: 328-346. gs

Olsson, R. K. (1970). Paleocene planktonic foraminiferal biostratigraphy and paleozoogeography of New Jersey. Journal of Paleontology. 44(4): 589-604. gs

Olsson, R. K., Hemleben, C., Berggren, W. A. & Liu, C. (1992). Wall Texture Classification of planktonic foraminifera genera in the Lower Danian. Journal of Foraminiferal Research. 22(3): 195-213. gs

Pokorný, V. (1955). Cassigerinella boudecensis n. gen., n. sp. (Foraminifera, Protozoa) z Oligocénu ždánického flyše. Vestnik Ustredniho Ustavu Geologickeho. 30: 136-140. gs

Poore, R. Z. & Gosnell, L. B. (1985). Apertural features and surface texture of upper Paleogene biserial planktonic foraminifers: Links between Chiloguembelina and Streptochilus. Journal of Foraminiferal Research. 15: 1-5. gs

Premec Fucek, V., Hernitz Kucenjak, M. & Huber, B. T. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Chiloguembelina and Jenkinsina. 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 17): 459-480. gs

Premoli Silva, I. (1977). Upper Cretaceous-Paleocene magnetic stratigraphy at Gubbio, Italy; II. Biostratigraphy. Geological Society of America, Bulletin. 88: 371-374. gs

Reiss, Z. (1963). Reclassification of perforate foraminifera. Bulletin of the Geological Survey of Israel. 35: 1-111. gs

Resig, J. M. & Kroopnick, P. M. (1983). Isotopic and distributional evidence of a planktonic habit for the foraminiferal genus Streptochilus Bronnimann and Resig, 1971. Marine Micropaleontology. 8(3): 235-248. gs

Smart, C. W. & Thomas, E. (2006). The enigma of early Miocene biserial planktic foraminifera. Geology. 34: 1041-1044. gs

Smart, C. W. & Thomas, E. (2007). Emendation of the genus Streptochilus Brönnimann and Resig 1971 (Foraminifera) and new species from the lower Miocene of the Atlantic and Indian Oceans. Micropaleontology. 53(1-2): 73-103, 103 figures, 113 lates, 101 table. gs

Smit, J. (1982). Extinction and Evolution of planktonic foraminifera after a major impact at the Cretaceous/Tertiary boundary. In, Silver, L. T. & Schultz, P. H. (eds) Geological Implications of Impacts of Large Asteroids and Comets on the Earth, Geological Society of America Special Paper 190. 329-352. gs


Chiloguembelinidae compiled by the pforams@mikrotax project team viewed: 14-6-2024

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