Catalog - Hastigerina klampisensis

CATALOG OF ORIGINAL DESCRIPTIONS: Hastigerina klampisensis Kadar 1975

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 -> H -> Hastigerina -> Hastigerina klampisensis
Other pages this level: H. aspera digitata, H. digitata, H. eocenica, H. klampisensis, H. murrayi, H. parapelagica, H. primitiva

Hastigerina klampisensis

Citation: Hastigerina klampisensis Kadar 1975
Rank: species
Type specimens: Holotype (Plate 7, figure 52) PD 5122
Type age (chronostrat): sample n 9 -Sentolo Formation, Globigerinoides sicaniis-Globorotalia peripheroronda assemblage (Early Miocene)
Type locality: Central Java, Indonesia - West Progo Mountains, Yogyakarta Province
Type repository: Bandung; Paleontological collcction of the Geological Survey of Indonesia, Bandung.

Linked specimens: USNM-689645

Current identification:


Original Description

Test low, trochospiral; equatorial periphery lobate; axial periphery broadly rounded. Central portion of the dorsal side slightly concave forming biumbilicate-like form. Wall calcareous, finely perforate, smooth and hyaline. Chambers globular to ovate, 12 to 14 in number, arranged in 2½ to 3 whorls. The 5 to 6 chambers of the last whorl increase moderately in size, the ultimate ones slightly reduced. Sutures on spiral side radial, slightly curved ventrally. On both sides they are strongly depressed. Aperture a long narrow slit, bordered above by a narrow lip, umbilical-extraumbilical, extending onto the dorsal side. The relict apertures often are seen ventrally but not dorsally.

Size:
Largest diameter of the holotype is 0.46 mm: from locality n 9.

Etymology:

Extra details from original publication
This species is larger and has more chambers than Globorotalia minutissima figured by Bolli (1957, pl. 29, fig. 1 ) . It is distinguished from the holotype of Globorotalia siakensis (LeRoy) by the gradual increase in size of the chamhers of the final whorl, the slit-like aperture which extends onto the dorsal side, and the smooth surface wall. It is likely that this species is a transition form between Globorotalia and Hastigerina.

Editors' Notes

References:

Kadar, D. (1975). Planktonic foraminifera from the lower part of the Sentolo Formation, central Java, Indonesia. Journal of Foraminiferal Research. 5: 1-20. gs


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Hastigerina klampisensis compiled by the pforams@mikrotax project team viewed: 29-9-2022

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