Catalog - Guembelitria ornata Catalog - Guembelitria ornata

CATALOG OF ORIGINAL DESCRIPTIONS: Guembelitria ornata Gawor-Biedowa 1992

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 -> Guembelitria -> Guembelitria ornata
Other pages this level: G. alabamensis, G. azzouzi, G. besbesi, G. blowi, G. columbiana, G. coniungens, G. cretacea, G. dammula, G. harrisi, G. irregularis, G. kegeli, G. langparensis, G. ornata, G. oveyi, G. samwelli, G. sergipensis, G. stavensis, G. turrita, G. vivans, T. triseriata

Guembelitria ornata

Citation: Guembelitria ornata Gawor-Biedowa 1992
Taxonomic rank: species
Type specimens: Holotype: lG No. 46428/88/F Paratypes: 46429/88/F, 46430/88/F and 46431/88/F,
Type age (chronostrat): Upper Maastrichtian.
Type locality: Gorzków lG I borehole, depth 10.8 m.

Current identification:


Original Description

Diagnosis: Test very small, gradually increasing in size as chambers are added, consisting of 4 to 6 chambers in each row. Chambers spherical, tightly packed, ornamented with thin and numerous costae running parallel to a vertical axis of a test

Description: Test triserial, very small, gradually and slowly increasing in size as chambers are added, composed of 4 to 6 chambers in each of the three rows. Chambers are spherical, tightly packed. Chamber surface ornamented with numerous, thin costae running parallel to the growth axis of the test. The costae branch dichotomically. Chamber surface between costae as well as some costae are covered with pores (pI. 9: 1b). Septal suture and spiral sutures poorly depressed, masked by sculpture. The youngest chamber without costae, smooth. Aperture oval with a narrow lip, extending from the top of the ultimate chamber to its base.

Size:
Holotype length 0.168mm paratypes 0.168mm

Extra details from original publication
Variability. - Variability is low and concerns ornamentation of the three youngest chambers. These chambers may be smooth or all covered with costae, or the youngest chamber can be devoid of sculpture. In some specimens, the costae are more densely packed on three "edges"" of a test.

Remarks. - The investigated species differs from other so far known species of the genus Guembelitria in having sculptured test. It resembles Guembelitria cenomana (KELLER) in small degree of the test expansion with growth and in tight packing of chambers.

Distribution. - Poland - upper Maastrichtian (Lublin Chalk) in the boreholes Gorzkow IG 1 and MiechOw IG 2.

Derivation of name: From Latin ornatus - ornamented."

References:

Gawor-Biedowa, E. (1992). . -. gs


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Guembelitria ornata compiled by the pforams@mikrotax project team viewed: 18-6-2026

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