CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia ungulata Bermúdez 1961
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Citation: Globorotalia ungulata Bermúdez 1961taxonomic rank: speciesType age (chronostrat): RecentType locality: Holotype ( fig. 6a, b) from a depth of 6 15 fathoms at At!antis Station 2953, lat. 21°47' N., long. 84 °32'30" W.Type repository: Washington; USNM
Original Description "Concha más larga que ancha, biconvexa, lado ventra l más elevado que el lado dorsal, borde periférico agudo, fuertemente lim bado y lobulado, cámaras en dos vueltas de espira, todas visibles por la cara dorsal y só lo visibles cinco o seis por la cara ventral, las que constituyen la última vuelta de espira y aumentan rápidamente de tamaño según se forman la última cámara por el lado ventral muy inflada y angular; suturas de la cámaras oblicuas, fuertemente limbadas por el lado dorsal y radiales y hundidas por la cara ventral; pared lisa y finamente perforada, con algunas granulacio nes finas en la regió n próxima a la abertura; abertura como una ranura en la base de la cara interna de la última cámara con un diente valvular. " Size: Largo, 0.90-0.75 mm.; ancho, 0.60-0.50 mm.; espesor, 0.20 mm. Extra details from original publication La presente especie nueva se distingue de Globorotalia tumida (Brady) [Pulvinulina menardii (d'Orbigny) var. tumida, 1877] en su contextura más delicada. pared más lisa y en que la cara ventral de la última cámara es más inflada y angular. Esta especie se ha encontrado en numerosas muestras de la Expedición Atlantis, siempre asociada con la G. tumida (Brady), pero tiene suficientes caracteres que permiten separarla como una forma distinta. Aparentemente está limitada al Reciente.""
References:
Bermudez, P. J. (1961). Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleoceno-Reciente). Editorial Sucre, Caracas. (3): 1119-1393. gs
Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs
Globorotalia ungulata compiled by the pforams@mikrotax project teamviewed: 6-10-2024
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