CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinita parkerae Loeblich & Tappan 1957

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 -> Globigerinita -> Globigerinita parkerae
Other pages this level: G. africana, G. bikiniensis, G. boweni, G. dissimilis ciperoensis, G. globiformis, G. glutinata flparkerae, G. hardingae, G. howei, G. incrusta, G. iota, G. martini, G. martini martini, G. martini scandretti, G. naparimaensis, G. parkerae, G. riveroae, G. stainforthi praestainforthi, G. unicava primitiva

Globigerinita parkerae

Citation: Globigerinita parkerae Loeblich & Tappan 1957
Rank: species

Linked specimens: USNM-472872 USNM-5897

Current identification/main database link:


Original Description
Test free, tiny, trochospiral, compressed, sides flattened, periphery rounded, peripheral outline lobulate; chambers ovate to spherical, increasing slowly in size, 5 to 7 in the final whorl, with modified final chamber extending far onto the umbilical side to completely cover the umbilical region; sutures distinct, depressed, radial; wall calcareous, finely perforate, surface finely spinose; primary aperture in the early stages interio-marginal and umbilical, but that of the modified final chamber is multiple, consisting of small supplementary openings around the extended umbilical margin of the final chamber.

Size: Holotype 0.21 mm x 0.07mm thick

Extra details from original publication
Bronnimann (1951, p. 18) originally included in Globigerinita naparimaensis, a specimen with a modified final chamber and double aperture on the umbilical side (the holotype) and also other specimens (paratypes) which have a distinct umbilical-sutural "supplementary" chamber, with numerous accessory apertures around its periphery. The two forms were present in the same strata and were considered to be conspecific. As, in other horizons, the planktonic assemblage may include only one or the other type, they appear to be distinct and are here separated. The holotype of the present species (Bronnimann, 1951, text figs. 1, 2) has a modified final chamber which covers the Globigerina-like aperture of the previous chamber, and itself has two supplementary apertures at its umbilical margin. The true characters are well shown in Bronnimann's original figures of the holotype, and the species is here restricted to include only morphologically similar specimens.

The paratypes figured by Bronnimann (1951, text figs. 3-14) differ from the holotype in having a distinct supplemental-plate over the umbilical and apertural region. This plate does not resemble the true chambers as does the umbilically expanded modified final chamber of true Globigerinita. These paratypes of G. naparimaensis are referrable to the new genus and species, Tinophodella ambitacrena.

References:

Brönnimann, P. (1951a). Globigerinita naparimaensis n. gen., n. sp., from the Miocene of Trinidad, B. W. I. Contributions from the Cushman Foundation for Foraminiferal Research. 2(1): 16-18. gs V O

Loeblich, A. R. & Tappan, H. (1957c). The new planktonic foraminiferal genus Tinophodella, and an emendation of Globigerinita Bronnimann. Journal of the Washington Academy of Sciences. 47(4): 112-116. gs V O


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Globigerinita parkerae compiled by the pforams@mikrotax project team viewed: 26-11-2020

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