CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia trichotrocha Loeblich & Tappan 1957

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 trichotrocha
Other pages this level: << < G. sinuososuturalis, G. spinulosa, G. strabocella, G. sturanii, G. subbotinae, G. subconica, G. suterae, G. tadjikistanensis, G. testarugosa, G. tetracamerata, G. thebaica, G. tortiva, G. tosaensis, G. traubi, G. tribulosa, G. trichotrocha, G. trinidadensis, G. troelseni, G. truncatulinoides excelsa, G. uncinata, G. uncinata carinata, G. ungulata, G. velascoensis parva, G. wartsteinensis, G. whitei, G. wilcoxensis, G. wilcoxensis acuta, G. wilesi, G. woodi, G. youngi, G. zealandica> >>

Globorotalia trichotrocha

Citation: Globorotalia trichotrocha Loeblich & Tappan 1957
Rank: species
Type locality: west bank of Potomac River, near mouth of Aquia Creek, S. 10°E. of Brent Point on U. S. Geological Survey Nanjemoy Md.-Va. Quadrangle, 1:62,500, 1913, reprinted 1945.
Type sample (& lithostrat): Aquia formation, 3 to 6 feet above base of section exposed
Type specimens: Holotype (USNM P5365)and figured paratype (USNM P5705)
Type repository: Washington; USNM

Linked specimens: USNM-5355 USNM-5705 USNM-5690

Current identification:

Original Description

Test free, small, trochospiral, spiral side flattened, umbilical side strongly convex and highest at the umbilical shoulder around the small deep umbilicus, periphery subangular, peripheral outline only slightly lobidate; chambers low and relatively broad on the spiral side, with 6 or more rarely 7 in the final whorl, the chambers sloping sharply outward to the periphery from the umbilical shoulder at the small umbilicus,giving the test a low conical appearance; sutures distinct, curved obliquely backwards on the spiral side, radial on the umbilical side ; wall calcareous, finely perforate, entire surface may be hispid, but with early spire most prominently spinose, final one or two chambers may be somewhat more smooth; aperture a very small interiomarginal, extraumbilical-umbilical arch.

Size: Holotype 0.23 mm. in diameter.

Etymology: The specific name is from the Greek thrix, trichos, hair, and trochus, wheel.


Loeblich, A. R. & Tappan, H. (1957b). Planktonic foraminifera of Paleocene and early Eocene Age from the Gulf and Atlantic coastal plains. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 173-198. gs V O


Globorotalia trichotrocha compiled by the pforams@mikrotax project team viewed: 19-4-2021

Taxon Search:
Advanced Search

Short stable page link: Go to 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
Captcha Image
Powered by Commentics