Daughter taxa (time control age-window is: 0-800Ma)
Parvularugoglobigerina eugubina Morphology extremely variable; test small, trochospiral with 2½ whorls, each with 4½ to 8 inflated subglobular chambers, increasing slowly in size. The first and last whorls generally contain the same number of chambers. Spire height low to moderate; aperture elongate with a thickened rim, umbilical to nearly peripheral, may show more than one dorsal aperture.
Parvularugoglobigerina extensa Like P. alabamensis but aperture is centrally located, umbilical to extraumbilical, marked by a distinct lip, often elongate, and often asymmetrically oriented.
Parvularugoglobigerina alabamensis Test of 2½ whorls, each composed of 3 to 4 inflated subglobular chambers, increasing slowly in size. The aperture is low, centrally located, umbilical, and marked by a distinct lip.
Citation: Parvularugoglobigerina (Hofker, 1978), emendedTaxonomic rank: genusType species: Globigerinaeugubina Luterbacher and Premoli Silva, 1964.Synonyms: Postrugoglobigerina Salaj, 1986:52.Taxonomic discussion: As noted by several previous authors, Hofker's (1978) description of Parvularugoglobigerinaeugubina (Luterbacher and Premoli Silva) does not accurately describe Globigerinaeugubina Luterbacher and Premoli Silva, 1964 (Bang, 1979; Brinkhuis and Zachariasse, 1988; Loeblich and Tappan, 1988; Liu and Olsson,1992; Olsson et al., 1992). Nonetheless, the genus Parvularugoglobigerina was erected with Globigerinaeugubina Luterbacher and Premoli Silva, 1964, as the type species, and it remains the generic label for that species and related forms (Hofker, 1978; Brinkhuis and Zachariasse, 1988; Loeblich and Tappan, 1988; Olsson et al., 1992). The type species of Postrugoglobigerina is Postrugoglobigerinahariana Salaj, 1986. Because Postrugoglobigerinahariana Salaj, 1986, is a junior synonym of Globigerinaeugubina Luterbacher and Premoli Silva, 1964, Postrugoglobigerina Salaj, 1986, is a junior synonym of Parvularugoglobigerina Hofker, 1978. Parvularugoglobigerinids generally resemble woodringinids in their surface texture and apertural characteristics. [Olsson et al. 1999]
NB The presentation here still essentially follows Olsson et al. (1999). However the group has been extensively revised, particularly by Arenillas and co-workers, see Arenillas et al. 2018 for a synthesis of this work. [editor's comment - JRY 2018]
Distinguishing features: Parent taxon (Guembelitriidae): Tests triserial, trochospiral, or nearly triserial in initial whorl becoming biserial. Chambers usually globular or subglobular, increasing gradually in size. Aperture usually a loop-shaped arch, often slightly infolded on one side, marked by a fine lip. This taxon: Small, moderate to low trochospire of 2½ whorls of (sub)globular chambers. Chambers gradually increase in size; 3½-7 chambers per whorl, separated by radial and depressed sutures on both spiral and umbilical sides. Umbilicus closed. Aperture umbilical to extraumbilical, comma-shaped arch to long narrow opening in nearly equatorial position; bordered by a slight lip. Microperforate.
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.
Description
Biogeography and Palaeobiology
Most likely ancestor:Benthic foraminifera - at confidence level 3 (out of 5). Data source: Olsson et al. 1999.
Biostratigraphic distribution
Geological Range: Last occurrence (top): at top of P3b subzone (100% up, 60.7Ma, in Selandian stage). Data source: Total of ranges of the species in this database First occurrence (base): within P0 zone (66.00-66.04Ma, base in Danian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Primary source for this page: Olsson et al. 1999 - Atlas of Paleocene Planktonic Foraminifera, p. 82
References:
Arenillas, I., Arz, J. A. & Gilabert, V. (2018). Blooms of aberrant planktic foraminifera across the K/Pg boundary in the Western Tethys: causes and evolutionary implications. Paleobiology. 44(3): 460-489. gs
Bang, I. (1979). Foraminifera from the Type Section of the eugubina Zone Compared with Those from the Cretaceous/Tertiary Boundary Localities in Jylland, Denmark. Danmarks Geologiske Undersogelse Arbog. 1979: 139-165. gs
Brinkhuis, H. & Zachariasse, W. (1988). Dinoflagellate cysts, sea level changes and planktonic foraminifers across the Cretaceous-Tertiary boundary at El Haria, northwest Tunisia. Marine Micropaleontology. 13(2): 153-191. gs
Hofker, J. (1978). Analysis of a large succession of samples through the Upper Maastrichtian and Lower Tertiary of Drill Hole 47.2, Shatsky Rise, Pacific, Deep Sea Drilling Project. Journal of Foraminiferal Research. 8(1): 46-75. 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. gsO
Li, Q., McGowran, B. & Boersma, A. (1995). Early Palaeocene Parvularugoglobigerina and late Eocene Praetenuitella: does evolutionary convergence imply similar habitat? Journal of Micropalaeontology. 14: 119-134. gs
Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs
Luterbacher, H. & Premoli-Silva, I. (1964). Biostratigrafia del limite Cretaceo-Terziario nell'Appennino Centrale. Rivista Italiana di Paleontologia e Stratigrafia. 70: 67-128. gsO
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
Salaj, J. (1986). The new Postrugoglobigerina praedaubjergensis Zone at the base of the stratotype of the marine Paleocene (El Kef, Tunisia). Geologiscky Zbornik -Geologica Carpathica. 37: 35-58. gs
Parvularugoglobigerina compiled by the pforams@mikrotax project teamviewed: 20-1-2025
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