CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina hancocki McCulloch 1977

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 -> Globigerina -> Globigerina hancocki
Other pages this level: << < G. globosa Hagenow, G. globosa Hantken, G. globosa Pishvanova, G. globularis, G. glutinata, G. gomitulus, G. gradationis, G. grata, G. gravelli, G. graysonensis, G. grimsdalei, G. groenlandica, G. guadalupensis, G. hagni, G. haitiensis, G. hancocki, G. haoi, G. haynesi, G. helicina, G. helicina aculeata, G. helvetojurassica, G. hevensis, G. hexagona, G. hillebrandti, G. hirsuta, G. hoelzli, G. hofkeri, G. hornibrooki, G. horrida, G. hoterivica, G. hybrida, > >>

Globigerina hancocki

Citation: Globigerina hancocki McCulloch 1977
Rank: species
Type locality: In 15 fms. on Velero Station 409, 0°12'S, 90°52'W, James Bay, James (Santiago) Island, Galápagos.
Type age: Recent
Holotype Repository: Los Angeles, Univ Southern California, Allan Hancock Foundation
Type & figured specimens: holotype (fig. 6), AHF 2531.

Current identification/main database link:


Original Description
Test free, calcareous, lenticular, planoconvex, trochoid, compressed periphery broadly rounded, lobulate evolute involute; wall rather thick, punctate, opaque comparitively smooth; about three whorls of globose to elon gate globose chambers rap idly increasing in size, five in last formed whorl; low spired; sutures depressed, radiate; aperture large umbilical to extraumbilical with a narrow lip and ta pering fibrous attachments.  

Size: Holotype (fig. 6) 0.54 x 0.52 x 0.39mm.

Extra details from original publication
This species differs from Globigerina bulloides D’Orbigny, 1826, in being planoconvex and five subglobose not four globose chambers in the last formed whorl.
Numerous specimens were found in one sample in James Bay. Apertures and texture also aid in separation of these two taxa. Thus far no satisfactory explanation of such a limited distribution for a pelagic form has been found.”

References:

McCulloch, I. A. (1977). Qualitative observations on Recent foraminiferal tests with emphasis on the eastern Pacific (3 vols). University of Southern California, Los Angeles. -. gs


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Globigerina hancocki compiled by the pforams@mikrotax project team viewed: 9-12-2019

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