The Late Danian Event at Site 1209: a rapid diversification of calcareous nannofossils

Miniati, Francesco; Monechi, Simonetta; Cappelli, Carlotta

doi:10.3301/rol.2014.94

Cited by 1 publication

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“…Based on SEM micrographs, the distal unit of Diantholitha is shown to be composed of two concentric cycles of elements (Miniati et al, 2015), as also suggested by Bown (2016), and the distal unit of Diantholitha (calyptra in Aubry et al, 2011) has a different structure from the typically monocyclic calyptra of Lithoptychius. The presence of two cycles in the distal unit of Diantholitha conflicts with the original description of the genus (Aubry et al, 2011).…”

Section: Remarksmentioning

confidence: 52%

“…Most of these successions were previously analyzed for biostratigraphy and taxonomy and have abundant and well-preserved calcareous nannofossils across the Danian-Selandian interval (Fig. 2) , 1977Fuqua et al, 2008;Youssef, 2009;Aubry et al, 2011Aubry et al, , 2012Monechi et al, 2012Monechi et al, , 2013Miniati et al, 2014).…”

Section: Methodsmentioning

confidence: 99%

“…At least two distinct radiation events (first and second radiation of fasciculiths) were recognized across the Danian-Selandian. Fasciculith radiation has been documented in different areas (e.g., Steurbaut and Sztrákos, 2008;Bernaola et al, 2009;Dinarès-Turell et al, 2010;Aubry et al, 2012;Monechi et al, 2013;Miniati et al, 2014) and therefore represent an important biostratigraphic tools for this time interval. Romein (1979) introduced the term "first radiation of Fasciculithus" to distinguish the gradual evolution of fasciculiths from the ancestor form G. magnus in the E. macellus-F. tympaniformis zones.…”

Section: The Radiation Of Fasciculiths (Characterization and Comparison With First And Second Radiation)mentioning

confidence: 99%

“…Moreover, these authors point out the biostratigraphic relevance of the biohorizon corresponding to the lowest occurrence of Diantholitha and define the onset of the first radiation of fasciculiths in correspondence of the appearance of Lithoptychius (LOs of L. chowii and L. varolii). The first radiation of fasciculiths (sensu Monechi et al, 2013) has been recognized in different sections, including at ODP Sites 1262 and 1209 (Monechi et al, 2013;Miniati et al, 2014), and correlates with the Latest Danian Event (LDE). At present, the different definitions of the first radiation of Fasciculithus have resulted in a vague and ambiguous use of this term.…”

Section: The Radiation Of Fasciculiths (Characterization and Comparison With First And Second Radiation)mentioning

confidence: 99%

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Revised taxonomy and early evolution of fasciculiths at the Danian–Selandian transition

Miniati

Cappelli

Monechi

2021

J. Micropalaeontol.

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Abstract. We present a taxonomic revision of the family Fasciculithaceae focused on forms that characterize the early evolution of this family group, which are currently included within the genera Gomphiolithus, Diantholitha, Lithoptychius and Fasciculithus. The investigation approach is based on a combined light microscope (LM) and scanning electron microscope (SEM) analysis of specimens from well-preserved ODP–DSDP site material (ODP Site 1209; Site 1262; ODP Site 1267; DSDP Site 356; DSDP Site 119) and outcrops (Bottaccione and Contessa, Italy; Qreiya, Egypt) across the Danian–Selandian transition. The direct LM–SEM comparison of the same individual specimen provides clarification of several taxa that were previously described only with the LM. One new genus (Tectulithus), five new combinations (Tectulithus janii, Tectulithus merloti, Tectulithus pileatus, Tectulithus stegastos and Tectulithus stonehengei) and six new species are defined (Diantholitha pilula, Diantholitha toquea, Lithoptychius galeottii, Lithoptychius maioranoae, Tectulithus pagodiformis and Fasciculithus realeae). The main characteristics useful to identify fasciculiths with the LM are provided, together with a 3D–2D drawing showing the main structural features. The accurate taxonomic characterization grants the development of an evolutionary lineage that documents a great fasciculith diversification during the late Danian and early Selandian. Four different well-constrained events have been documented: the lowest occurrence (LO) of Gomphiolithus, the paracme of Fasciculithaceae at the top of Chron C27r (PTC27r), the radiation of Diantholitha (LO Diantholitha), the paracme of Fasciculithaceae at the base of Chron C26r (PBC26r), the radiation of Lithoptychius (LO Lithoptychius) and the radiation of Tectulithus (lowest common occurrence of Tectulithus) that shows the biostratigraphic relevance of this group across the Danian–Selandian transition.

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Section: Remarksmentioning

confidence: 52%

Section: Methodsmentioning

confidence: 99%

Section: The Radiation Of Fasciculiths (Characterization and Comparison With First And Second Radiation)mentioning

confidence: 99%

Section: The Radiation Of Fasciculiths (Characterization and Comparison With First And Second Radiation)mentioning

confidence: 99%

See 2 more Smart Citations

Revised taxonomy and early evolution of fasciculiths at the Danian–Selandian transition

Miniati

Cappelli

Monechi

2021

J. Micropalaeontol.

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The Late Danian Event at Site 1209: a rapid diversification of calcareous nannofossils

Cited by 1 publication

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Revised taxonomy and early evolution of fasciculiths at the Danian–Selandian transition

Revised taxonomy and early evolution of fasciculiths at the Danian–Selandian transition

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