Systematics, Ontogeny, and Phylogenetic Implications of Exceptional Anatomically Preserved Cycadophyte Leaves from the Middle Jurassic of Bearreraig Bay, Skye, Northwest Scotland
The Middle Jurassic (Aalenian-Bajocian) shallow marine deposits of Bearreraig Bay, Skye, northwest Scotland, have yielded calcite-permineralized leaves of cycadophytes showing unusually well preserved anatomy. Morphological characters identify the leaves as Nilssonia cf. tenuinervis Seward (Cycadale...
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Systematics, Ontogeny, and Phylogenetic Implications of Exceptional Anatomically Preserved Cycadophyte Leaves from the Middle Jurassic of Bearreraig Bay, Skye, Northwest Scotland |
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Dower, Beatrice L Bateman, Richard M Stevenson, Dennis Wm |
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Anatomy Bennettitales Calcite Company distribution practices Contents Cycadales Cycadopsida Cycads Distribution Environmental aspects Epidermis Flora Flowers & plants Fossils geographical distribution Jurassic Leaf characters Leaves Morphology New species Nilssonia tenuinervis Ontogeny Otozamites mortonii paleobotany Papillae Phylogenetics Phylogeny plant anatomy Plant cuticle plant morphology Plant tissues Plant veins Plants Preservation Ptilophyllum cutchense Stomata Systematics taxonomy Vascular tissue |
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The Botanical review, 2004-04, Vol.70 (2), p.105-120 |
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The Middle Jurassic (Aalenian-Bajocian) shallow marine deposits of Bearreraig Bay, Skye, northwest Scotland, have yielded calcite-permineralized leaves of cycadophytes showing unusually well preserved anatomy. Morphological characters identify the leaves as Nilssonia cf. tenuinervis Seward (Cycadales), Otozamites mortonii sp. nov. (Bennettitales), a putative juvenile leaf showing imbricate, recurved pinnae, and Otozamites sp. Permineralized Jurassic cycadophytes occur in only four other localities worldwide; the better-known coeval adpression flora of Yorkshire lacks anatomical preservation. Past studies of fossil cycadophyte species have therefore emphasized morphology, whereas the Skye specimens reveal details of anatomy greatly exceeding published descriptions of similar species. The arrangement of vascular tissues in the rachis of Otozamites resembles that described for Ptilophyllum cutchense Morris (Bennettitales) from India. Stomata observed in the preserved cuticle of the Nilssonia leaf superficially resemble those of the extant cycad Macrozamia Miquel. Given the 180 million years separating these two genera, and the fragmentary preservation and equivocal phylogenetic position of Nilssonia, comparative interpretations remain tentative. Leaf characters have been little used in phylogenetic analyses, reflecting exaggerated fears of anatomical and morphological convergence; these characters therefore require particular attention when comparing fossil cycadophytes with their living relatives. |
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Morphological characters identify the leaves as Nilssonia cf. tenuinervis Seward (Cycadales), Otozamites mortonii sp. nov. (Bennettitales), a putative juvenile leaf showing imbricate, recurved pinnae, and Otozamites sp. Permineralized Jurassic cycadophytes occur in only four other localities worldwide; the better-known coeval adpression flora of Yorkshire lacks anatomical preservation. Past studies of fossil cycadophyte species have therefore emphasized morphology, whereas the Skye specimens reveal details of anatomy greatly exceeding published descriptions of similar species. The arrangement of vascular tissues in the rachis of Otozamites resembles that described for Ptilophyllum cutchense Morris (Bennettitales) from India. Stomata observed in the preserved cuticle of the Nilssonia leaf superficially resemble those of the extant cycad Macrozamia Miquel. Given the 180 million years separating these two genera, and the fragmentary preservation and equivocal phylogenetic position of Nilssonia, comparative interpretations remain tentative. Leaf characters have been little used in phylogenetic analyses, reflecting exaggerated fears of anatomical and morphological convergence; these characters therefore require particular attention when comparing fossil cycadophytes with their living relatives.</description><identifier>ISSN: 0006-8101</identifier><identifier>EISSN: 1874-9372</identifier><identifier>DOI: 10.1663/0006-8101(2004)070[0105:SOAPIO]2.0.CO;2</identifier><identifier>CODEN: BOREA4</identifier><language>eng</language><publisher>Bronx: New York Botanical Garden</publisher><subject>Anatomy ; Bennettitales ; Calcite ; Company distribution practices ; Contents ; Cycadales ; Cycadopsida ; Cycads ; Distribution ; Environmental aspects ; Epidermis ; Flora ; Flowers & plants ; Fossils ; geographical distribution ; Jurassic ; Leaf characters ; Leaves ; Morphology ; New species ; Nilssonia tenuinervis ; Ontogeny ; Otozamites mortonii ; paleobotany ; Papillae ; Phylogenetics ; Phylogeny ; plant anatomy ; Plant cuticle ; plant morphology ; Plant tissues ; Plant veins ; Plants ; Preservation ; Ptilophyllum cutchense ; Stomata ; Systematics ; taxonomy ; Vascular tissue</subject><ispartof>The Botanical review, 2004-04, Vol.70 (2), p.105-120</ispartof><rights>The New York Botanical Garden</rights><rights>Copyright 2004 The New York Botanical Garden</rights><rights>COPYRIGHT 2004 New York Botanical Garden</rights><rights>COPYRIGHT 2004 New York Botanical Garden</rights><rights>The New York Botanical Garden 2004</rights><rights>The New York Botanical Garden 2004.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a614t-4601fe4315326267badff723e6581aad74ac03ee570f05e70e6ef977e3c8b7ab3</citedby><cites>FETCH-LOGICAL-a614t-4601fe4315326267badff723e6581aad74ac03ee570f05e70e6ef977e3c8b7ab3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/4354471$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4354471$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>315,787,791,27992,27993,58952,59185</link.rule.ids></links><search><creatorcontrib>Dower, Beatrice L</creatorcontrib><creatorcontrib>Bateman, Richard M</creatorcontrib><creatorcontrib>Stevenson, Dennis Wm</creatorcontrib><title>Systematics, Ontogeny, and Phylogenetic Implications of Exceptional Anatomically Preserved Cycadophyte Leaves from the Middle Jurassic of Bearreraig Bay, Skye, Northwest Scotland</title><title>The Botanical review</title><addtitle>Botanical Review</addtitle><description>The Middle Jurassic (Aalenian-Bajocian) shallow marine deposits of Bearreraig Bay, Skye, northwest Scotland, have yielded calcite-permineralized leaves of cycadophytes showing unusually well preserved anatomy. Morphological characters identify the leaves as Nilssonia cf. tenuinervis Seward (Cycadales), Otozamites mortonii sp. nov. (Bennettitales), a putative juvenile leaf showing imbricate, recurved pinnae, and Otozamites sp. Permineralized Jurassic cycadophytes occur in only four other localities worldwide; the better-known coeval adpression flora of Yorkshire lacks anatomical preservation. Past studies of fossil cycadophyte species have therefore emphasized morphology, whereas the Skye specimens reveal details of anatomy greatly exceeding published descriptions of similar species. The arrangement of vascular tissues in the rachis of Otozamites resembles that described for Ptilophyllum cutchense Morris (Bennettitales) from India. Stomata observed in the preserved cuticle of the Nilssonia leaf superficially resemble those of the extant cycad Macrozamia Miquel. Given the 180 million years separating these two genera, and the fragmentary preservation and equivocal phylogenetic position of Nilssonia, comparative interpretations remain tentative. Leaf characters have been little used in phylogenetic analyses, reflecting exaggerated fears of anatomical and morphological convergence; these characters therefore require particular attention when comparing fossil cycadophytes with their living relatives.</description><subject>Anatomy</subject><subject>Bennettitales</subject><subject>Calcite</subject><subject>Company distribution practices</subject><subject>Contents</subject><subject>Cycadales</subject><subject>Cycadopsida</subject><subject>Cycads</subject><subject>Distribution</subject><subject>Environmental aspects</subject><subject>Epidermis</subject><subject>Flora</subject><subject>Flowers & plants</subject><subject>Fossils</subject><subject>geographical distribution</subject><subject>Jurassic</subject><subject>Leaf characters</subject><subject>Leaves</subject><subject>Morphology</subject><subject>New species</subject><subject>Nilssonia tenuinervis</subject><subject>Ontogeny</subject><subject>Otozamites mortonii</subject><subject>paleobotany</subject><subject>Papillae</subject><subject>Phylogenetics</subject><subject>Phylogeny</subject><subject>plant anatomy</subject><subject>Plant cuticle</subject><subject>plant morphology</subject><subject>Plant tissues</subject><subject>Plant veins</subject><subject>Plants</subject><subject>Preservation</subject><subject>Ptilophyllum cutchense</subject><subject>Stomata</subject><subject>Systematics</subject><subject>taxonomy</subject><subject>Vascular tissue</subject><issn>0006-8101</issn><issn>1874-9372</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqdkl1v0zAUhiMEEmPwD5Cw4IZJTXfsfDiBq64qpagsFWFXCFluctKmS-Niu2P5W_xCHAVNmgQCcWVZ5_Hr19bjeecUxjSOg3MAiP2EAn3NAMIz4PAFKERv8myyWmRf2RjG0-wte-Cd0ISHfhpw9tA7uTv12HtizA6A0pQnJ96PvDMW99LWhRmRrLVqg203IrItyWrbNf0W3ZAs9oemLhynWkNURWa3BR76nWzIpJVW7d20aTqy0mhQ32BJpl0hS3XYdhbJEuUNGlJptSd2i-RjXZYNkg9HLY1x8S7xAqXWqGW9IRfSVcivOxyRS6Xt9jsaS_JC2cb1euo9qmRj8Nmv9dS7ejf7PH3vL7P5YjpZ-jKmofXDGGiFYUCjgMUs5mtZVhVnAcZRQqUseSgLCBAjDhVEyAFjrFLOMSiSNZfr4NR7NeQetPp2dA3ETh21e68RjCechSlLwVEv_0hRmiQJxIGDzgZoIxsUdVuo1uKt3cijMWKRfxITGlLKAxrTv7GX_8wm8-V91v8dW6imwQ0K93XT7D4_H_hCK2M0VuKg673UnaAgehNF75TonRK9icKZKHoTxWCiYAKEi2Qu6fmQtDNW6buYMIjCkPcXvRjGlVRCbnRtxFXOgAYAaQQ0TRwxG4h1rVSL_13kJ63m-iQ</recordid><startdate>20040401</startdate><enddate>20040401</enddate><creator>Dower, Beatrice L</creator><creator>Bateman, Richard M</creator><creator>Stevenson, Dennis Wm</creator><general>New York Botanical Garden</general><general>Springer Nature B.V</general><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X2</scope><scope>7XB</scope><scope>88A</scope><scope>88I</scope><scope>8FE</scope><scope>8FH</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>LK8</scope><scope>M0K</scope><scope>M2O</scope><scope>M2P</scope><scope>M7P</scope><scope>MBDVC</scope><scope>PADUT</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>R05</scope></search><sort><creationdate>20040401</creationdate><title>Systematics, Ontogeny, and Phylogenetic Implications of Exceptional Anatomically Preserved Cycadophyte Leaves from the Middle Jurassic of Bearreraig Bay, Skye, Northwest Scotland</title><author>Dower, Beatrice L ; Bateman, Richard M ; Stevenson, Dennis Wm</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a614t-4601fe4315326267badff723e6581aad74ac03ee570f05e70e6ef977e3c8b7ab3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Anatomy</topic><topic>Bennettitales</topic><topic>Calcite</topic><topic>Company distribution practices</topic><topic>Contents</topic><topic>Cycadales</topic><topic>Cycadopsida</topic><topic>Cycads</topic><topic>Distribution</topic><topic>Environmental aspects</topic><topic>Epidermis</topic><topic>Flora</topic><topic>Flowers & plants</topic><topic>Fossils</topic><topic>geographical distribution</topic><topic>Jurassic</topic><topic>Leaf characters</topic><topic>Leaves</topic><topic>Morphology</topic><topic>New species</topic><topic>Nilssonia tenuinervis</topic><topic>Ontogeny</topic><topic>Otozamites mortonii</topic><topic>paleobotany</topic><topic>Papillae</topic><topic>Phylogenetics</topic><topic>Phylogeny</topic><topic>plant anatomy</topic><topic>Plant cuticle</topic><topic>plant morphology</topic><topic>Plant tissues</topic><topic>Plant veins</topic><topic>Plants</topic><topic>Preservation</topic><topic>Ptilophyllum cutchense</topic><topic>Stomata</topic><topic>Systematics</topic><topic>taxonomy</topic><topic>Vascular tissue</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dower, Beatrice L</creatorcontrib><creatorcontrib>Bateman, Richard M</creatorcontrib><creatorcontrib>Stevenson, Dennis Wm</creatorcontrib><collection>AGRIS</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Agricultural Science Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Biology Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Agriculture & Environmental Science Database</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>AUTh Library subscriptions: ProQuest Central</collection><collection>ProQuest Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection (Proquest) (PQ_SDU_P3)</collection><collection>Biological Sciences</collection><collection>Agricultural Science Database</collection><collection>ProQuest Research Library</collection><collection>ProQuest Science Journals</collection><collection>Biological Science Database</collection><collection>Research Library (Corporate)</collection><collection>Research Library China</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><collection>University of Michigan</collection><jtitle>The Botanical review</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dower, Beatrice L</au><au>Bateman, Richard M</au><au>Stevenson, Dennis Wm</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Systematics, Ontogeny, and Phylogenetic Implications of Exceptional Anatomically Preserved Cycadophyte Leaves from the Middle Jurassic of Bearreraig Bay, Skye, Northwest Scotland</atitle><jtitle>The Botanical review</jtitle><addtitle>Botanical Review</addtitle><date>2004-04-01</date><risdate>2004</risdate><volume>70</volume><issue>2</issue><spage>105</spage><epage>120</epage><pages>105-120</pages><issn>0006-8101</issn><eissn>1874-9372</eissn><coden>BOREA4</coden><abstract>The Middle Jurassic (Aalenian-Bajocian) shallow marine deposits of Bearreraig Bay, Skye, northwest Scotland, have yielded calcite-permineralized leaves of cycadophytes showing unusually well preserved anatomy. Morphological characters identify the leaves as Nilssonia cf. tenuinervis Seward (Cycadales), Otozamites mortonii sp. nov. (Bennettitales), a putative juvenile leaf showing imbricate, recurved pinnae, and Otozamites sp. Permineralized Jurassic cycadophytes occur in only four other localities worldwide; the better-known coeval adpression flora of Yorkshire lacks anatomical preservation. Past studies of fossil cycadophyte species have therefore emphasized morphology, whereas the Skye specimens reveal details of anatomy greatly exceeding published descriptions of similar species. The arrangement of vascular tissues in the rachis of Otozamites resembles that described for Ptilophyllum cutchense Morris (Bennettitales) from India. Stomata observed in the preserved cuticle of the Nilssonia leaf superficially resemble those of the extant cycad Macrozamia Miquel. Given the 180 million years separating these two genera, and the fragmentary preservation and equivocal phylogenetic position of Nilssonia, comparative interpretations remain tentative. Leaf characters have been little used in phylogenetic analyses, reflecting exaggerated fears of anatomical and morphological convergence; these characters therefore require particular attention when comparing fossil cycadophytes with their living relatives.</abstract><cop>Bronx</cop><pub>New York Botanical Garden</pub><doi>10.1663/0006-8101(2004)070[0105:SOAPIO]2.0.CO;2</doi><tpages>16</tpages></addata></record> |