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.
Linked specimens: USNM-211374
Current identification/main database link: Hastigerina pelagica (d'Orbigny, 1839)
Original Description
Etymology:
Extra details from original publication
Distribution: The species can be considered very rare. Its temporal and spatial distribution is unknown. but probably occupies similar limits as H. pelagica and H. digitiformans.
Remarks: Some workers have expressed the opinion that H. pelagica and the forms here called Hastigerina parapelagica. n. sp., and Hastigerinopsis digitiformans n. gen., n. sp. belong to a growth series of a single species. Bé (1965) found that "H. digitata" (=H. digitiformans) only occurs in bathypelagic depths. and concluded that forms known as H. pelagica, H. parapelagica, and H. digitiformans represented successive maturation stages of H. pelagica. The conclusion of Banner and Blow (1960. p. 26) is accepted here, however, that these three are separate and quite distinct species. H. parapelagica is larger in test size and more lobulate in the final convolution than H. pelagica, and larger in test size (for an equal number of chambers) and larger in chamber size although less clavate than H. digitiformans. Neither H. pelagica nor H. digitiformans have the partially limbate sutures of H. parapelagica, caused by the incomplete embracement of the partially perforate apertural lip of the previous chamber by the subsequent chamber. near the biumbilical depressions (plate 2, figures 2a. 2c). Spine bases of this species are quite large and triangular (plate 6. figure 6. lower right). partially extending onto nearby pores. Spines originating on chambers of earlier whorls which penetrate a later chamber (plate 6, figure 6, upper left) create a simple spine base on the new surface which holds the spine but does not attach to it. Complete spines were not preserved on the fossil material studied here or in the literature; it is. however, inferred from its generic affinity with Hastigerina pelagica and Hastigerinopsis digitiformans that the spines are triradiate throughout their length and possess spinal barbs.
Saito, T., Thompson, P. R. & Breger, D. (1976). Skeletal ultra-microstructure of some elongate-chambered planktonic foraminifera and related species. In, Takayanagi, Y. & Saito, T. (eds) Progress in Micropaleontology, Special Publication. Micropaleontology Press, The American Museum of Natural History, New York 278-304. gsReferences:
Hastigerina parapelagica compiled by the pforams@mikrotax project team viewed: 12-11-2024
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