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Gosavisiphon gen. nov. based on Halimeda paucimedullaris SCHLAGINTWEIT&EBLI,1998:a remarkable macroalga(Udoteaceae?)from the Late Cretaceous of the Northern Calcareous Alps(Austria and Germany) with affinites to Late Paleozoic and Late Triassic phylloids

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Title (Dublin Core)

Gosavisiphon gen. nov. based on Halimeda paucimedullaris SCHLAGINTWEIT&EBLI,1998:a remarkable macroalga(Udoteaceae?)from the Late Cretaceous of the Northern Calcareous Alps(Austria and Germany) with affinites to Late Paleozoic and Late Triassic phylloids

Description (Dublin Core)

<!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:238; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-1610611985 1107304683 0 0 159 0;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:238; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin-top:0cm; margin-right:0cm; margin-bottom:10.0pt; margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-fareast-language:EN-US;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-fareast-language:EN-US;} .MsoPapDefault {mso-style-type:export-only; margin-bottom:10.0pt; line-height:115%;} @page Section1 {size:595.3pt 841.9pt; margin:70.85pt 70.85pt 70.85pt 70.85pt; mso-header-margin:35.4pt; mso-footer-margin:35.4pt; mso-paper-source:0;} div.Section1 {page:Section1;} --><p class="MsoNormal" style="margin: 0cm 0cm 0pt; mso-layout-grid-align: none;"><span style="font-family: Times New Roman;"><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">The new genus </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Gosavisiphon </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">with the type-species </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Halimeda paucimedullaris </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">SCHLAGINTWEIT &amp; EBLI, 1998, tentatively referred to the Udoteaceae, is described from the Late Cretaceous (Middle/Late Cenomanian-Santonian) of the Branderfleck Formation and the Lower Gosau Subgroup of the Northern Calcareous Alps (Austria, Germany). It is a plurimillimetric to pluricentimetric marine, hard-substrate dwelling macroalga, with membraneous and partly fused plates and an internal siphonaceous construction but lacking a real medullary zone. Although some thallus details are still unknown, </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Gosavisiphon </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">gen. nov. can, from a strictly morphological point of view, directly be compared with the Late Palaeozoic and Upper Triassic phylloid algae. </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Gosavisiphon </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">gen. nov. is the first fossil record of a platy siphonal alga in the Cretaceous, since the Late Triassic </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Ivanovia triassica </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">REID. The monotypic taxon is most probably endemic to the Northern Calcareous Alps where it dwelled in protected, terrestrially influenced lagoonal environments attaching to hard substrates, (metazoan skeletons, rudistid shells). Based on findings of the cylindrical </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Halimeda</span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">? aff. </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">johnsoni </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">PAL and another taxon described as </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Halimeda </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">sp. with typically flattened ovate segments, some considerations on the segment-morphological phylogenetic evolution of </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Halimeda </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">LAMOUROUX are provided. </span><em><span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;" lang="EN-US">Halimeda </span></em><span style="font-family: TimesNewRomanPSMT; font-size: 9pt; mso-ansi-language: EN-US; mso-bidi-font-family: TimesNewRomanPSMT;" lang="EN-US">species with discoidal-flattened segments, that can morphologically be compared with extant species, are not known prior to the Turonian. Forms possessing cylindrical segments date further back, but can not directly be compared morphologically with modern counterparts, thus placing doubts on the existence of long-lasting methusalemi species by uniting extant and fossil species, as proposed by both botanists and palaeontologists in recent times.</span></span></p><!--[if gte mso 10]> <mce:style><! /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} > <! [endif] > <p class="MsoNormal">The new genus Gosavisiphon with the type-species Halimeda paucimedullaris SCHLAGINTWEIT & EBLI, 1998, tentatively refered to the Udoteaceae, is described from the Late Cretaceous (Middle/Late Cenomanian-Santonian) of the Branderfleck Formation and the Lower Gosau Subgroup of the Northern Calcareous Alps (Austria, Germany). It is a plurimillimetric to pluricentimetric marine, hard-substrate dwelling macroalga with membraneous and partly fused plates and an internal siphonaceous construction but lacking a real medullary zone. Although some thallus details are still unknown, Gosavisiphon gen. nov. can, from a strictly morphological point of view, directly be compared with the Late Paleozoic and Upper Triassic phylloid algae. Gosavisiphon gen. nov. is the first fossil record of a platy siphonal alga in the Cretaceous, since the Late Triassic Ivanovia triassica REID. The monotypic taxon is most probably endemic to the Northern Calcareous Alps where it dwelled in protected, terrestrically influenced lagoonal environments attaching to hard substrates (metazoan skeletons, rudistid shells). Based on findings of the cylindrical Halimeda? aff. johnsoni PAL and another taxon described as Halimeda sp. with typically flattened ovate segments, some considerations on the segment-morphological phylogenetic evolution of Halimeda LAMOUROUX are provided. As one result, Halimeda species with discoidal-flattened segments, that can morphologically be compared with extant species, are not known prior to the Turonian. Forms possessing cylindrical segments date further back, but can not directly be compared morphologically with modern counterparts, thus putting doubts on the existence of long-lasting methusalemi species by uniting extant and fossil species, as proposed by both botanists and palaeontologists in recent times.<-->

Creator (Dublin Core)

Felix Schlagintweit

Subject (Dublin Core)

Calcareous algae, taxonomy, Bryopsidales, Halimedaceae, Udoteaceae, phylloid algae, Phylogeny, Upper Cretaceous, Northern Calcareous Alps
Geology
QE1-996.5

Publisher (Dublin Core)

Croatian Geological Survey

Date (Dublin Core)

2010-02-01T00:00:00Z

Type (Dublin Core)

article

Identifier (Dublin Core)

1330-030X
1333-4875
10.4154/GC.2010.02
https://doaj.org/article/a4aea78790b848858be20b224e9f9df2

Source (Dublin Core)

Geologia Croatica, Vol 63, Iss 1, Pp 27-53 (2010)

Language (Dublin Core)

EN

Relation (Dublin Core)

http://www.geologia-croatica.hr/ojs/index.php/GC/article/view/92
https://doaj.org/toc/1330-030X
https://doaj.org/toc/1333-4875

Provenance (Dublin Core)

Journal Licence: CC BY