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The Ordovician acritarch genera Tranvikium and Ampullula: their relationship and taxonomy
A restudy of the Ordovician (Arenig–Llanvirn) acritarch taxa Tranvikium polygonale Tynni, 1982, and Ampullula suetica Righi, 1991, indicates that they represent extremes in a single morphological plexus. At one extreme are forms with a polar ‘excystment’ aperture (closed by an operculum or two operc...
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| Published in: | Review of palaeobotany and palynology 2000-10, Vol.112 (1), p.23-38 |
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| container_title | Review of palaeobotany and palynology |
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| creator | Uutela, Anneli Sarjeant, William A.S. |
| description | A restudy of the Ordovician (Arenig–Llanvirn) acritarch taxa
Tranvikium polygonale Tynni, 1982, and
Ampullula suetica Righi, 1991, indicates that they represent extremes in a single morphological plexus. At one extreme are forms with a polar ‘excystment’ aperture (closed by an operculum or two opercular pieces) and a smaller opening (plugged or open) at the opposite pole; at the other are forms lacking a polar aperture but having, at the opposite pole, a tube open distally and plugged or open basally. New morphological terms for these structures are proposed. The genera and species are treated as synonyms and an emended diagnosis is given for
Tranvikium polygonale, incorporating this whole morphological plexus. The possible purposes of the structures exhibited and the likely affinity of
T. polygonale to various groups of algae are discussed. The emendation of
Ampullula by
Brocke (1997) is rejected and the genus
Stelomorpha Yin, 1994 retained, with an emended diagnosis. The new combination
Stelomorpha princeps (
Brocke, 1997) Uutela and Sarjeant is proposed. |
| doi_str_mv | 10.1016/S0034-6667(00)00033-6 |
| format | article |
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Tranvikium polygonale Tynni, 1982, and
Ampullula suetica Righi, 1991, indicates that they represent extremes in a single morphological plexus. At one extreme are forms with a polar ‘excystment’ aperture (closed by an operculum or two opercular pieces) and a smaller opening (plugged or open) at the opposite pole; at the other are forms lacking a polar aperture but having, at the opposite pole, a tube open distally and plugged or open basally. New morphological terms for these structures are proposed. The genera and species are treated as synonyms and an emended diagnosis is given for
Tranvikium polygonale, incorporating this whole morphological plexus. The possible purposes of the structures exhibited and the likely affinity of
T. polygonale to various groups of algae are discussed. The emendation of
Ampullula by
Brocke (1997) is rejected and the genus
Stelomorpha Yin, 1994 retained, with an emended diagnosis. The new combination
Stelomorpha princeps (
Brocke, 1997) Uutela and Sarjeant is proposed.</description><identifier>ISSN: 0034-6667</identifier><identifier>EISSN: 1879-0615</identifier><identifier>DOI: 10.1016/S0034-6667(00)00033-6</identifier><identifier>PMID: 11042324</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>acritarchs ; Ampullula ; Chlorophyceae ; Finland ; Ordovician ; Sweden ; Tranvikium</subject><ispartof>Review of palaeobotany and palynology, 2000-10, Vol.112 (1), p.23-38</ispartof><rights>2000 Elsevier Science B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a403t-44af4e185c7a6401fb479701caf85c6f72f1d7f329da011ca9beb38d6cf33eef3</citedby><cites>FETCH-LOGICAL-a403t-44af4e185c7a6401fb479701caf85c6f72f1d7f329da011ca9beb38d6cf33eef3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11042324$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Uutela, Anneli</creatorcontrib><creatorcontrib>Sarjeant, William A.S.</creatorcontrib><title>The Ordovician acritarch genera Tranvikium and Ampullula: their relationship and taxonomy</title><title>Review of palaeobotany and palynology</title><addtitle>Rev Palaeobot Palynol</addtitle><description>A restudy of the Ordovician (Arenig–Llanvirn) acritarch taxa
Tranvikium polygonale Tynni, 1982, and
Ampullula suetica Righi, 1991, indicates that they represent extremes in a single morphological plexus. At one extreme are forms with a polar ‘excystment’ aperture (closed by an operculum or two opercular pieces) and a smaller opening (plugged or open) at the opposite pole; at the other are forms lacking a polar aperture but having, at the opposite pole, a tube open distally and plugged or open basally. New morphological terms for these structures are proposed. The genera and species are treated as synonyms and an emended diagnosis is given for
Tranvikium polygonale, incorporating this whole morphological plexus. The possible purposes of the structures exhibited and the likely affinity of
T. polygonale to various groups of algae are discussed. The emendation of
Ampullula by
Brocke (1997) is rejected and the genus
Stelomorpha Yin, 1994 retained, with an emended diagnosis. The new combination
Stelomorpha princeps (
Brocke, 1997) Uutela and Sarjeant is proposed.</description><subject>acritarchs</subject><subject>Ampullula</subject><subject>Chlorophyceae</subject><subject>Finland</subject><subject>Ordovician</subject><subject>Sweden</subject><subject>Tranvikium</subject><issn>0034-6667</issn><issn>1879-0615</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqFkE1PGzEQhq0K1ATan9Bqj-GwZbz22lkuKIpKWwmJQ9NDT9bEOyam-xHs3Qj-fU0SwZHTaEbPO6N5GPvC4RsHri5_AwiZK6X0DOACUidy9YFN-VxXOShenrDpKzJhZzE-JIiXpf7IJpyDLEQhp-zvakPZXaj7nbceuwxt8AMGu8nuqaOA2Spgt_P__Nhm2NXZot2OTTM2eJUNG_IhC9Tg4Psubvx2Twz41Hd9-_yJnTpsIn0-1nP25-b7avkzv7378Wu5uM1RghhyKdFJ4vPSalQSuFtLXWngFl2aKacLx2vtRFHVCDyNqzWtxbxW1glB5MQ5mx32bkP_OFIcTOujpabBjvoxmrS6EhJ0wRNaHlAb-hgDObMNvsXwbDiYF6tmb9W8KDMAZm_VqJT7ejwxrluq31JHjQm4PgCUHt15CiZaT52l2geyg6l7_86J_-0viAA</recordid><startdate>20001001</startdate><enddate>20001001</enddate><creator>Uutela, Anneli</creator><creator>Sarjeant, William A.S.</creator><general>Elsevier B.V</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20001001</creationdate><title>The Ordovician acritarch genera Tranvikium and Ampullula: their relationship and taxonomy</title><author>Uutela, Anneli ; Sarjeant, William A.S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a403t-44af4e185c7a6401fb479701caf85c6f72f1d7f329da011ca9beb38d6cf33eef3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>acritarchs</topic><topic>Ampullula</topic><topic>Chlorophyceae</topic><topic>Finland</topic><topic>Ordovician</topic><topic>Sweden</topic><topic>Tranvikium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Uutela, Anneli</creatorcontrib><creatorcontrib>Sarjeant, William A.S.</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Review of palaeobotany and palynology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Uutela, Anneli</au><au>Sarjeant, William A.S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Ordovician acritarch genera Tranvikium and Ampullula: their relationship and taxonomy</atitle><jtitle>Review of palaeobotany and palynology</jtitle><addtitle>Rev Palaeobot Palynol</addtitle><date>2000-10-01</date><risdate>2000</risdate><volume>112</volume><issue>1</issue><spage>23</spage><epage>38</epage><pages>23-38</pages><issn>0034-6667</issn><eissn>1879-0615</eissn><abstract>A restudy of the Ordovician (Arenig–Llanvirn) acritarch taxa
Tranvikium polygonale Tynni, 1982, and
Ampullula suetica Righi, 1991, indicates that they represent extremes in a single morphological plexus. At one extreme are forms with a polar ‘excystment’ aperture (closed by an operculum or two opercular pieces) and a smaller opening (plugged or open) at the opposite pole; at the other are forms lacking a polar aperture but having, at the opposite pole, a tube open distally and plugged or open basally. New morphological terms for these structures are proposed. The genera and species are treated as synonyms and an emended diagnosis is given for
Tranvikium polygonale, incorporating this whole morphological plexus. The possible purposes of the structures exhibited and the likely affinity of
T. polygonale to various groups of algae are discussed. The emendation of
Ampullula by
Brocke (1997) is rejected and the genus
Stelomorpha Yin, 1994 retained, with an emended diagnosis. The new combination
Stelomorpha princeps (
Brocke, 1997) Uutela and Sarjeant is proposed.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>11042324</pmid><doi>10.1016/S0034-6667(00)00033-6</doi><tpages>16</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0034-6667 |
| ispartof | Review of palaeobotany and palynology, 2000-10, Vol.112 (1), p.23-38 |
| issn | 0034-6667 1879-0615 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1859340721 |
| source | Elsevier |
| subjects | acritarchs Ampullula Chlorophyceae Finland Ordovician Sweden Tranvikium |
| title | The Ordovician acritarch genera Tranvikium and Ampullula: their relationship and taxonomy |
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