CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia adamantea Saito 1963

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 -> Globorotalia -> Globorotalia adamantea
Other pages this level: G. acostaensis, G. acostaensis trochoidea, G. acrostoma, G. acrostoma partimlabiata, G. acutispira, G. adamantea, G. aequa bullata, G. africana, G. akersi, G. alamedillensis, G. albeari, G. almadenensis, G. amuria, G. andalusiana, G. anfracta, G. angulata abundocamerata, G. angulata kubanensis, G. angulata praepentacamerata, G. apanthesma, G. apertura, G. aragonensis> >>

Globorotalia adamantea

Citation: Globorotalia adamantea Saito 1963
Rank: species
Type locality: Yamagata Prefecture; Japan
Type age (chronostrat): Miocene
Type sample (& lithostrat): sample Nz-1, of the Numazawa formation
Type specimens: Pl. 54, figs. 4a-5c; Holotype, IGPS coll. cat. no. 79033; paratype, IGPS coll. cat. no. 79034; other ten unfigured paratypes; all from the sample Nz-1, of the Numazawa formation, Yamagata Prefecture.

Current identification:


Original Description

Test low trochospiral, rather spiroconvex, occasionally biconvex, earlier whorl with high tightly coiled trochospire, umbilical side slightly concave, equatorial periphery lobulated with sub-rhomboidal outline, axial periphery rounded, three to four whorls visibleon spiral side; chambers moderately inflated, longer than broad, elongate tangentially inspiral view, increasing gradually in size as added, five chambers in initial whorl, four or some-times five in final one, up to 17-18; sutures depressed, slightly curved on spiral side, radial to slightly sinuous on umbilical side; wall calcareous, perforate, fairly thick with pittedsurface; aperture very low arch without distinct lip umbilical-extraumbilical, extending from shallow umbilical area to test margin; sometimes developed at base of final chamber around umbilicus, pustules. Coiling of the test nearly random.


Size: Maximum diameter of holotype 0.54 mm., thickness 0.30 mm. Other specimens range from 0.24 to 0.54 mm. in maximum diameter.

Extra details from original publication
Remarks: This is a species showing rather Globigerina-like inflated chambers. The shape of the chambers change from inflated subglobular to axially somewhat compressed, and in axial profile from narrowly to broadly rounded. In general outline, this species somewhat resembles Globorotalia zealandica Hornibrook, but it differs from the latter in having no vaulted test on umbilical side and very low arched aperture usually with an indistinct lip, and more inflated chambers.

Occurrence and distribution: This species occurs abundantly only at the type locality In association with the typical assemblage of the Globorotalia fohsi fohsi Zone.

References:

Maiya, S., Saito, T. & Sato, T. (1976). Late Cenozoic planktonic foraminiferal biostratigraphy of northwest Pacific sedimentary sequences. In, Takayanagi, Y. & Saito, T. (eds) Progress in Micropaleontology. Micropaleontology Press, New York 395-422. gs

Saito, T. (1963). Miocene planktonic foraminifera from Honshu, Japan. Science Reports of the Tohoku University, Series 2 (Geology). 35: 123-209. gs


logo

Globorotalia adamantea compiled by the pforams@mikrotax project team viewed: 15-5-2021

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/pforams/index.php?id=131047 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics