CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia andalusiana Perconig, Martinez & Granados, 1980
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Citation: Globorotalia andalusiana Perconig, Martinez & Granados, 1980Taxonomic rank: speciesDescribed on page(s) : 27-31Type specimens: pl. I, figs. 1-3; pl. 2, fig. 6: Fig. ld, I, v, holotype; 2d, I, v, 3d, I, v, 6d, 1, v, three specimensType sample (& lithostrat): white siliceous marlsType age (chronostrat): Upper Miocene. lower Andalusian [lower Messinian].
Type locality: Cabeza Gorda, lat. 36°47'22" N., long. 2°36'08" W., near the Cortijo del Evora some 5 km east of Sanlucar de Barrameda. AndaluciaType repository: Madrid; Servicio de Estratigrafia, Empresa Nacional Adaro de Investigacio nes Mineras, S. A
Original Description Plasmostraco trocoespiral-lenticular. Periferia subaguda con una ligera carena o espesamiento marginal no perforado, que puede extenderse a lo largo de todo el borde o solamente del de las dos ultimas camaras. Perfil ecuatorial de sub- ovalado a ovalado. ligeramente lobado. Perfil axial practicamente biconvexo, con tendencia a una concavidad ventral. Suturas muy curvadas en ellado dorsal, a veces limbada (depende del grado de desarrollo de Ia carena); subrectilineas o ligeramente curvas, mas profundas, en el ventral. Camaras ligeramente hinchadas en el lado dorsal y obviamente mas en el ventral. Ultima vuelta con 4-5 camaras de forma semilunar, que aumentan bastante rapidamente de tamafio. La longitud de cada camara es aproximadamente el doble de Ia altura. En el lado ventral Ia ultima camara ocupa desde un poco mas de una cuarta parte a un tercio abundante de Ia superficie total. Ombligo practicamente cerrado, recubierto. en Ia mayoria de los casas, por una expansion umbilical de Ia ultima camara. Abertura interiomarginal, umbilical-extraumbilical. pequeña, en forma de fisura arqueada, con un labia fino. Superficie del plasmostraco finamente perforada, lisa. Direccion de enrollamiento indiferente. Size: Diametro maximo de 0.3 a 0.4 mm. Extra details from original publication Relaciones y diferencias con otras especies. - Por sus caracteres morfologicos, G. andalusiana se situa entre G. margaritae y G. martinezi.
No tiene el lado ventral tan deprimido (a veces concavo) de G. margaritae, la carena es mas fina, a veces apenas esbozada. las camaras no estan tan despegadas, y el tamaño es, en general, mas pequeño.
Respecto a G. martinezi tiene las camaras menos hinchadas, tendencia a depresion del lado umbilical, carena mas acentuada, abertura mas fisuriforme, tamano mas pequeño. Otra especie parecida es Globorotalia ichinosekiensis Takayanagi y Oda, aparentemente muy proxima de G. margaritae y que parece representar una forma intermedia entre G. andalusiana y G. margaritae, a pesar de su presencia, en Japon, en niveles mas bajos (formacion Shimokurosawa).
References:
Perconig, E., Martinez, C. & Granado, L. (1980). Perconig, E., Martinez, C. & Granado, L. (1980). Globorotalia andalusiana, nueva especie de foraminfero del Mioceno terminal (Andaluciense). Rev. Espanola Micropal., Madrid, Spain, 1980, vol. 12, no. I, pp. 27-31. Revista Española de Micropaleontología. 12(1): 27-31. Revista Española de Micropaleontología. 12(1): 27-31. gs
Globorotalia andalusiana compiled by the pforams@mikrotax project teamviewed: 17-6-2025
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