CATALOG OF ORIGINAL DESCRIPTIONS: Parvularugoglobigerina Hofker, 1978

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 -> P -> Parvularugoglobigerina
Other pages this level: Palaeoglobigerina, Paracostellagerina, Paragloborotalia, Paraspiroplecta, Parasubbotina, Parathalmanninella, Paraticinella, Parkerina, Parvularugoglobigerina, Pearsonites, Pessagnoina, Phanerostomum, Planoglobanomalina, Planoglobulina, Planoheterohelix, Planomalina, Planorotalites, Planulina, Planulitella, Plummerita, Plummerita (Radotruncana), Polskanella, Polyperibola, Porticulasphaera, > >>

Daughter taxa: (blue => in age window 0-800Ma)


Parvularugoglobigerina

Citation: Parvularugoglobigerina Hofker, 1978
Rank: Genus
Type species: Globigerina eugubina Luterbacher and Premoli Silva, 1964
Type age: uppermost Maastrichtian

Current identification/main database link: Parvularugoglobigerina (Hofker, 1978), emended


Original Description
Very small species with 3-6 chambers in the last-formed whorl; at the dorsal side all chambers visible; at the ventral side only those of the last-formed coil; chambers globular, with sutures depressed on both sides; umbilical cavity very small; walls thin, consisting of one lamella, with small pustules in between the pores; often the pustules are found in rows, as in Rugoglobigerina. Pores fine, pipelike, at the surface ending in a funnel, as in some species they end in pits of the wall. Aperture an umbilical-extraumbilical, crescentlike opening, with slightly thickened border, or a narrow poreless lip.

The genus is found in a short period just at the end of the uppermost Maastrichtian.

The extraumbilical aperture may be explained as caused by the small umbilical hollow and seems to be due to a slight torsion of the chambers; in initial chambers the apertures are umbilically placed; as a whole the genus is not unlike Hedbergella, though there are some different characteristics. Parvularugoglobigerina seems to be the atavistic end of the Hedbergella-Rugoglobigerina lineage. The structural features of the test walls in these genera are alike: the walls consist of fine radial crystals.

References:

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


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Parvularugoglobigerina compiled by the pforams@mikrotax project team viewed: 5-4-2020

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