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.
Hendersonia hendersoni Georgescu&Abramovich 2008 | |||
Hendersonia jerseyensis Georgescu&Abramovich 2008 |
Current identification/main database link: Hendersonites Georgescu & Abramovich 2009
See also: Hendersonites - replacement name;
Description.– Test is biserial throughout. Chambers are globular to subrectangular in lateral view, increasing gradually and moderately in size as added. Sutures are distinct and depressed, straight to slightly oblique to the test axis of growth. Periphery is subacute due to the development of a test wall flexure, which results in the duplication of the test wall in the periphery region. Aperture is arch-shaped, situated at the base of the last formed chamber. Two small and symmetrical periapertural flanges, rimmed or not, border the aperture on the lateral sides. Apical part can be smooth. Pustulose periapertural area is present above the aperture. Chamber surface ornamented with costae, which can be parallel to the periphery, longitudi- nal or oblique to the test axis of growth. Ornamentation thickenings can be present on the earlier chambers in the proximity of the central ‘zigzag’ suture. Test wall calcareous, hyaline perforate; pores can be simple, or situated in the center of a crater-like structure in the evolved species. Species included.– Gümbelina carinata Cushman, 1938 (p. 18, pl. 3, fig. 10); Hendersonia hendersoni nov. sp.; Hendersonia jerseyensis n. sp.
Original Description
Etymology:
Extra details from original publication
Phylogenetic relationships.– Hendersonia nov. gen. evolved from the Heterohelix planata (Cushman, 1938) group of species and is the ancestor of Paraspiroplecta nov. gen. (Fig. 4).
Editors' Notes
Georgescu, M. D. & Abramovich, S. (2008b). Taxonomic revision and phylogenetic classification of the Late Cretaceous (upper Santonian-Maastrichtian) serial planktonic foraminifera (Familiy Heterohelicidae Cushman, 1927) with peripheral test wall flexure. Revista Española de Micropaleontología. 40: 97-114. gs References:
Hendersonia compiled by the pforams@mikrotax project team viewed: 10-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=131776 Go to Archive.is to create a permanent copy of this page - citation notes |
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