the new species occurs also in coeval deposits from central and southern Italy: Mattinata (Gargano), Rio Arno (Gran Sasso), Conca di Cittareale (Rieti). The new species is a potential additional marker of SBZ 2 (Shallow Benthic Zones sensu Serra-Kiel et al. 1998), and represents a noteworthy occurrence in the frame of the biotic recovery after the K/T event, as well as the co-occurring larger foraminiferal assemblages. The investigated specimens come from a clast from a conglomerate of the Mt. Vrachionas succession (Dermitzakis 1978) cropping out along the Romiri/Macherado-Agalas road, near the village of Kiliomeno, Zakynthos (Ionian Islands, Greece) (37°44.603' N 20°47.795' E). The age of the assemblage is Selandian, SBZ 2 sensu Serra-Kiel et al. (1998). Miscellanea n. sp. occurs with Haddonia praeheissigi Samuel, Köhler & Borza 1977, Haymanella paleocenica Sirel, 1998, Kayseriella decastroi Sirel, 1998, Globoflarina sphaeroidea (Fleury 1982), Pseudocuvillierina sireli (İnan, 1988) and Helenalveolina cf. rahaghii nom. nud. in Drobne et al. (2005). The microspheric form is lenticular, with strongly biconvex test in axial section, slightly larger than the megalospheric specimens: 1.78 mm (equatorial diameter), 1.11 mm (axial thickness). 33 chambers in the last whorl. There are about 4 regular whorls. The megalospheric form is lenticular, with strongly biconvex test in axial section and a small spherical megalosphere, with a mean internal diameter of 97 μm (n=9). The test thickness (axial section) ranges from 0.77 to 1.05 mm, with a mean value of 0.94 mm (n=7). The equatorial diameter ranges from 1.15 mm to 1.62 mm, with a mean value of 1.25 mm (n=7). At least 23 chambers are present in the last whorl; there are about 3.5 regular whorls. Miscellanea n. sp. differs from M. agriensis Sirel 1997, M. yvettae Leppig 1988, M. ‘juliettae pfenderae’ and M. ‘juliettae villattae’ Leppig 1988 for the diameter of the proloculus, the number of chambers in the last whorl and other characters (number of whorls, test shape and dimensions).

A new species of Miscellanea (Foraminiferida) from the Selandian of the central Neo-Tethys

DI CARLO, MASSIMO;PIGNATTI, Johannes
2009

Abstract

the new species occurs also in coeval deposits from central and southern Italy: Mattinata (Gargano), Rio Arno (Gran Sasso), Conca di Cittareale (Rieti). The new species is a potential additional marker of SBZ 2 (Shallow Benthic Zones sensu Serra-Kiel et al. 1998), and represents a noteworthy occurrence in the frame of the biotic recovery after the K/T event, as well as the co-occurring larger foraminiferal assemblages. The investigated specimens come from a clast from a conglomerate of the Mt. Vrachionas succession (Dermitzakis 1978) cropping out along the Romiri/Macherado-Agalas road, near the village of Kiliomeno, Zakynthos (Ionian Islands, Greece) (37°44.603' N 20°47.795' E). The age of the assemblage is Selandian, SBZ 2 sensu Serra-Kiel et al. (1998). Miscellanea n. sp. occurs with Haddonia praeheissigi Samuel, Köhler & Borza 1977, Haymanella paleocenica Sirel, 1998, Kayseriella decastroi Sirel, 1998, Globoflarina sphaeroidea (Fleury 1982), Pseudocuvillierina sireli (İnan, 1988) and Helenalveolina cf. rahaghii nom. nud. in Drobne et al. (2005). The microspheric form is lenticular, with strongly biconvex test in axial section, slightly larger than the megalospheric specimens: 1.78 mm (equatorial diameter), 1.11 mm (axial thickness). 33 chambers in the last whorl. There are about 4 regular whorls. The megalospheric form is lenticular, with strongly biconvex test in axial section and a small spherical megalosphere, with a mean internal diameter of 97 μm (n=9). The test thickness (axial section) ranges from 0.77 to 1.05 mm, with a mean value of 0.94 mm (n=7). The equatorial diameter ranges from 1.15 mm to 1.62 mm, with a mean value of 1.25 mm (n=7). At least 23 chambers are present in the last whorl; there are about 3.5 regular whorls. Miscellanea n. sp. differs from M. agriensis Sirel 1997, M. yvettae Leppig 1988, M. ‘juliettae pfenderae’ and M. ‘juliettae villattae’ Leppig 1988 for the diameter of the proloculus, the number of chambers in the last whorl and other characters (number of whorls, test shape and dimensions).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/212457
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