Catalog - Haigella haigi

CATALOG OF ORIGINAL DESCRIPTIONS: Haigella haigi Georgescu 2009

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 -> Haigella -> Haigella haigi
Other pages this level: H. haigi, H. intermedia

Haigella haigi

Citation: Haigella haigi Georgescu 2009
Rank: Species
Type specimens: Holotype.– Specimen WKB 010017. Paratypes.– Seven specimens, WKB 010018.
Type age (chronostrat): Upper Albian (lower part of the P.appenninica Biozone).
Type locality: Western North Atlantic Ocean (Blake Plateau).
Type repository: Alberta; Willi Karl Braun Micropaleontological Collection at the University of Calgary (Calgary, Alberta, Canada.)

Current identification:


Original Description

Diagnosis.– Haigella with triserial test and chambers of the adult stage with lateral projections.

Description.– Test with curved growth axis and triserial chamber arrangement. Earlier chambers are globular, those of the adult stage present short, backward oriented lateral projections (Pl. 5, Figs 7-14). A line of tubercles lines up the chamber projections in the adult stage (Pl. 5, Figs 7, 8, Pl. 7, Fig. 2). Earlier part of the test with rounded periphery; the chambers of the adult portion of the test present subacute to acute periphery due to the development of backward oriented chamber projections. Sutures are distinct, deeply incised, straight or slightly curved.

Aperture is single, elliptical in shape and subterminal in position (Pl. 5, Figs 10, 14). It is bordered by an asymmetrically developed imperforate rim. A supplementary suture is present on the apertural face, between the base of the aperture and the suture between the last-formed and penultimate chamber (Pl. 5, Figs 10, 14). Chamber surface is smooth. Test wall is calcitic, hyaline and nannoperforate, with pore diameter ranging between 0.2 and 0.5 µm (Pl. 7, Fig. 2).


Size:
Dimensions.– L = 0.215-0.405 mm. This range is based on measurements taken on eight specimens (holotype included). Test width could not be measured due to the fact that all of the Haigella haigi nov. sp. specimens display poorly preserved terminal part of the test.

Etymology:
Etymology.– As for the genus.

Extra details from original publication

Remarks.– Haigella haigi differs from H. intermedia by being completely triserial and bearing well developed backward-oriented chamber projections in the adult stage.

The specimens with relatively similar gross test architecture reported from the lower Turonian (offshore Ghana, equatorial Atlantic Ocean) and assigned to Praebulimina sp. 1 by Holbourn & Kuhnt (1998, p. 363, pl. 3, figs 1-2) cannot be included within Haigella. They present chamber projections without lined peripheral tubercles and aperture situated at the base of the apertural face, without relict suture.


Editors' Notes

References:

Georgescu, M. D. (2009a). On the origins of Superfamily Heterohelicacea Cushman, 1927 and the polyphyletic nature of planktic foraminifera. Revista Española de Micropaleontología. 41: 107-144. gs V O


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Haigella haigi compiled by the pforams@mikrotax project team viewed: 5-12-2022

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