CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana concavata cyrenaica Barr 1972

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 -> Globotruncana -> Globotruncana concavata cyrenaica
Other pages this level: << < G. bollii, G. bulloides naussi, G. calcarata, G. calcarata arcata, G. calcarata primitiva, G. calcarata retardata, G. caliciformis sarmientoi, G. caliciformis trinidadensis, G. campbelli, G. canaliculata ventricosa, G. carpathica, G. carteri, G. churchi, G. citae, G. coldreriensis, G. concavata cyrenaica, G. conica, G. conica plicata, G. contusa galeoidis, G. contusa patelliformis, G. contusa scutilla, G. contusa witwickae, G. convexa, G. culverensis, G. dentata, G. dorreeni, G. dupeublei, G. erevanica, G. falsocalcarata, G. falsostuarti, G. fareedi> >>

Globotruncana concavata cyrenaica

Citation: Globotruncana concavata cyrenaica Barr 1972
Rank: sub-species
Type locality: At the base of the sea cliffs about 75 yards west of the mouth of Wadi al Qalah and about 40 yards west of a small spring which supplies water for the village of Ras al Hilal, Marsa al Hilal area, northern Cyrenaica, Libyca.
Type age (chronostrat): Santonian
Type specimens: 167889
Type repository: Washington; USNM

Linked specimens: USNM-186372 USNM-167890 USNM-167889

Current identification/main database link: Dicarinella concavata (Brotzen, 1934)


Original Description
"Test a very low trochospiral with the spiral side gently concave and the umbilical side strongly convex; evolute, umbilicate, consisting of 3-3.5 whorls; equatorial periphery generally circular, weakly to strongly lobulate, having 2 well-developed, closely spaced, finely beaded keels which merge into a fine, unbeaded single keel on final 1-3 chambers. Chambers hemispherical, 5-6 in final whorl rapidly increasing in size. Sutures raised, curved on spiral side; radial, depressed on umbilical side. Umbilicus broad, moderately deep. Primary aperture umbilical and slightly extraumbilical; umbilical cover plate and accessory apertures not observed. Surface hispid, becoming smooth on final chambers of spiral side, coarsely hispid on umbilical side. Coiling predominantly dextral. Average maximum diameter 0.64 mm."

References:

Barr, F. T. (1972a). Cretaceous biostratigraphy and planktonic foraminifera of Libya. Micropaleontology. 18(1): 1-46. gs


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Globotruncana concavata cyrenaica compiled by the pforams@mikrotax project team viewed: 30-7-2021

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