treatments-xml/data/75/55/92/7555920181095B24B4E907B90D57F0AB.xml

<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.170.59471" ID-GBIF-Dataset="c973a724-f64e-4420-9b52-c57c27e7f96a" ID-PMC="PMC7746669" ID-Pensoft-Pub="1314-2003-170-1" ID-Pensoft-UUID="FEDFCD1BAB1A5D8D8DE38003D8EBEEDD" ID-PubMed="33363432" ModsDocID="1314-2003-170-1" checkinTime="1607628098743" checkinUser="pensoft" docAuthor="Murdock, Andrew G., Chen, Cheng-Wei, Huang, Yao-Moan &amp; Glenny, David" docDate="2020" docId="7555920181095B24B4E907B90D57F0AB" docLanguage="en" docName="PhytoKeys 170: 1-23" docOrigin="PhytoKeys 170" docPubDate="2020-12-10" docSource="http://dx.doi.org/10.3897/phytokeys.170.59471" docTitle="Ptisana ambulans Murdock &amp; C. W. Chen 2020, sp. nov." docType="treatment" docVersion="4" id="FEDFCD1BAB1A5D8D8DE38003D8EBEEDD" lastPageNumber="1" masterDocId="FEDFCD1BAB1A5D8D8DE38003D8EBEEDD" masterDocTitle="Affinities of the fern genus Ptisana (Marattiaceae) in the Solomon Islands, with descriptions of two new species" masterLastPageNumber="23" masterPageNumber="1" pageNumber="1" updateTime="1668140170847" updateUser="ExternalLinkService">
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<mods:title>Affinities of the fern genus Ptisana (Marattiaceae) in the Solomon Islands, with descriptions of two new species</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Murdock, Andrew G.</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-7749-2857</mods:nameIdentifier>
<mods:affiliation>Innovative Genomics Institute, University of California, Berkeley, 2151 Berkeley Way, Berkeley, California 94720, USA &amp; University and Jepson Herbaria, University of California, Berkeley, 1001 Valley Life Sciences Building, Berkeley, California 94720, USA</mods:affiliation>
<mods:nameIdentifier type="email">andymurdock@berkeley.edu</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Chen, Cheng-Wei</mods:namePart>
<mods:affiliation>No. 37, Lane 656, Chung Cheng Rd., Keelung City, 20246, Taiwan</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Huang, Yao-Moan</mods:namePart>
<mods:affiliation>Taiwan Forestry Research Institute, No. 53, Nanhai Rd, Zhongzheng District, Taipei City, 10066, Taiwan</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Glenny, David</mods:namePart>
<mods:affiliation>Allan Herbarium, Manaaki Whenua, PO Box 40, Lincoln 7640, New Zealand</mods:affiliation>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:title>PhytoKeys</mods:title>
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<mods:date>2020</mods:date>
<mods:detail type="pubDate">
<mods:number>2020-12-10</mods:number>
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<mods:detail type="volume">
<mods:number>170</mods:number>
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<mods:start>1</mods:start>
<mods:end>23</mods:end>
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<mods:url>http://dx.doi.org/10.3897/phytokeys.170.59471</mods:url>
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<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.170.59471</mods:identifier>
<mods:identifier type="Pensoft-Pub">1314-2003-170-1</mods:identifier>
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<treatment ID-GBIF-Taxon="170725655" LSID="urn:lsid:plazi:treatment:7555920181095B24B4E907B90D57F0AB" httpUri="http://treatment.plazi.org/id/7555920181095B24B4E907B90D57F0AB" lastPageNumber="1" pageId="0" pageNumber="1">
<subSubSection pageId="0" pageNumber="1" type="nomenclature">
<paragraph pageId="0" pageNumber="1">
<taxonomicName LSID="75559201-8109-5B24-B4E9-07B90D57F0AB" authority="Murdock &amp; C. W. Chen" authorityName="Murdock &amp; C. W. Chen" authorityYear="2020" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana ambulans" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="ambulans" status="sp. nov.">Ptisana ambulans Murdock &amp; C.W. Chen</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Ptisana ambulans: A type specimen B live plant of type collection C abaxial surface of ultimate segment D segment attachment points and terminus of the costa. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure3" httpUri="https://binary.pensoft.net/fig/485321" pageId="0" pageNumber="1">Figures 3</figureCitation>
<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Comparison of venation and margins (A-E) and apices of ultimate segments (F, G) of the Ptisana species in the Solomon Islands A, F P. ambulans B, G P. decipiens var. decipiens C, H P. decipiens var. delicata D, I P. papuana E, J P. smithii. Scale bars: 5 mm." figureDoi="10.3897/phytokeys.170.59471.figure6" httpUri="https://binary.pensoft.net/fig/485324" pageId="0" pageNumber="1">, 6A, F</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="materials_examined">
<paragraph pageId="0" pageNumber="1">Type.</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" pageId="0" pageNumber="1">Solomon Islands.</emphasis>
Vahole, New Georgia Island, Western Province, Solomon Islands. Under forest. 250-350 m. 28 Sep 2012. C.-W. Chen &amp; T.-C. Hsu SITW00629. 
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Holotype</emphasis>
: BSIP. 
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Isotypes</emphasis>
: TAIF [421080], TNM.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="diagnosis">
<paragraph pageId="0" pageNumber="1">Diagnosis.</paragraph>
<paragraph pageId="0" pageNumber="1">
Differs from 
<taxonomicName authorityName="Murdock &amp; C. W. Chen" authorityYear="2020" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana decipiens" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="decipiens">
<emphasis italics="true" pageId="0" pageNumber="1">Ptisana decipiens</emphasis>
</taxonomicName>
in having costae without prominent wings, nearly marginal synangia; ultimate segments ovate (versus elliptic to oblong), veins tightly spaced (ca. 0.8 mm, compared to 1.3 mm in 
<taxonomicName lsidName="P. decipiens" pageId="0" pageNumber="1" rank="species" species="decipiens">
<emphasis italics="true" pageId="0" pageNumber="1">P. decipiens</emphasis>
</taxonomicName>
), lamina thick, margins entire, serrated only at apex, revolute when dry, apex abruptly acuminate, uniseriate hairs subtending synangia.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="description">
<paragraph pageId="0" pageNumber="1">Description.</paragraph>
<paragraph pageId="0" pageNumber="1">
Fronds 3-pinnate, up to 2.5 m long. Stipe circular in cross-section (stipe coloration and indument not observed). Fronds bearing 3 pairs of similarly sized pinnae on mature fronds, the terminal pair forking dichotomously at the frond apex, each pinna up to 1 m long. Swollen pulvini present at the base of all segments, green, smooth. Ultimate segments 6.5-8 cm long 
<normalizedToken originalValue="×">x</normalizedToken>
1.3-1.5 cm wide, oblong with abruptly acuminate apices (Fig, 6F); pinnule costulae slightly zigzagging and wingless (Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Ptisana ambulans: A type specimen B live plant of type collection C abaxial surface of ultimate segment D segment attachment points and terminus of the costa. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure3" httpUri="https://binary.pensoft.net/fig/485321" pageId="0" pageNumber="1">3A, B</figureCitation>
). Laminae dark green above, pale whitish-green below, thick and coriaceous, with occasional brown-orange scales abaxially along veins and midribs (Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Ptisana ambulans: A type specimen B live plant of type collection C abaxial surface of ultimate segment D segment attachment points and terminus of the costa. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure3" httpUri="https://binary.pensoft.net/fig/485321" pageId="0" pageNumber="1">3C, D</figureCitation>
). Veins free, ca. 0.8 mm apart, rarely dividing once near the midrib (Fig. 
<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Comparison of venation and margins (A-E) and apices of ultimate segments (F, G) of the Ptisana species in the Solomon Islands A, F P. ambulans B, G P. decipiens var. decipiens C, H P. decipiens var. delicata D, I P. papuana E, J P. smithii. Scale bars: 5 mm." figureDoi="10.3897/phytokeys.170.59471.figure6" httpUri="https://binary.pensoft.net/fig/485324" pageId="0" pageNumber="1">6A</figureCitation>
). Leaf margin entire, serrate only at apex, slightly revolute when dried. Synangia green when immature, brown after opening, one per vein, nearly marginal, set back from leaf margin by ca. 1 mm, ca. 1.5 mm long 
<normalizedToken originalValue="×">x</normalizedToken>
0.8 mm wide, 10-14 locules per synangium (Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Ptisana ambulans: A type specimen B live plant of type collection C abaxial surface of ultimate segment D segment attachment points and terminus of the costa. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure3" httpUri="https://binary.pensoft.net/fig/485321" pageId="0" pageNumber="1">3C</figureCitation>
), receptacles bearing short, uniseriate hairs.
</paragraph>
<caption doi="10.3897/phytokeys.170.59471.figure3" httpUri="https://binary.pensoft.net/fig/485321" pageId="0" pageNumber="1" start="Figure 3" startId="F3">
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" pageId="0" pageNumber="1">Figure 3.</emphasis>
<taxonomicName authorityName="Murdock &amp; C. W. Chen" authorityYear="2020" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana ambulans" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="ambulans">
<emphasis italics="true" pageId="0" pageNumber="1">Ptisana ambulans</emphasis>
</taxonomicName>
: 
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
type specimen 
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
live plant of type collection 
<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
abaxial surface of ultimate segment 
<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
segment attachment points and terminus of the costa. Photos: C.-W. Chen.
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="etymology">
<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
<paragraph pageId="0" pageNumber="1">
The epithet 
<taxonomicName authorityName="Murdock &amp; C. W. Chen" authorityYear="2020" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana ambulans" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="ambulans">
<emphasis italics="true" pageId="0" pageNumber="1">Ptisana ambulans</emphasis>
</taxonomicName>
(walking) refers to the wingless costae.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="materials_examined">
<paragraph pageId="0" pageNumber="1">Selected specimens examined.</paragraph>
<paragraph pageId="0" pageNumber="1">Only known with certainty from one collection from New Georgia (see type above).</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="habitat">
<paragraph pageId="0" pageNumber="1">Habitat and distribution.</paragraph>
<paragraph pageId="0" pageNumber="1">Low elevation forest. Altitude range: 250-350 m. Only known with certainty from one population. Solomon Islands (New Georgia).</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="preliminary conservation assessment">
<paragraph pageId="0" pageNumber="1">Preliminary conservation assessment.</paragraph>
<paragraph pageId="0" pageNumber="1">
There is currently only one collection and observation of this species, but this is likely due to its similarity to the more widespread 
<taxonomicName lsidName="P. decipiens" pageId="0" pageNumber="1" rank="species" species="decipiens">
<emphasis italics="true" pageId="0" pageNumber="1">P. decipiens</emphasis>
</taxonomicName>
, and consequent under-collection. It is currently considered Data Deficient (DD) based on 
<bibRefCitation author="IUCN" journalOrPublisher="Kew Bulletin" pageId="0" pageNumber="1" publicationUrl="https://www.iucnredlist.org/" refId="B11" refString="IUCN, 2012. IUCN Red List Categories and Criteria, Version 3.1. 2nd edn. Prepared by the IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge. https://www.iucnredlist.org/" title="IUCN Red List Categories and Criteria, Version 3.1. 2 nd edn. Prepared by the IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge." url="https://www.iucnredlist.org/" year="2012">IUCN (2012)</bibRefCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="notes">
<paragraph pageId="0" pageNumber="1">Note.</paragraph>
<paragraph pageId="0" pageNumber="1">
In the field, this species was thought to be an atypical form of 
<taxonomicName lsidName="P. decipiens" pageId="0" pageNumber="1" rank="species" species="decipiens">
<emphasis italics="true" pageId="0" pageNumber="1">P. decipiens</emphasis>
</taxonomicName>
, but further examination found that both morphology and sequence data are clearly distinct, and no intermediates have been found. The presence of uniseriate hairs on the receptacle in 
<taxonomicName lsidName="P. ambulans" pageId="0" pageNumber="1" rank="species" species="ambulans">
<emphasis italics="true" pageId="0" pageNumber="1">P. ambulans</emphasis>
</taxonomicName>
is a character that is common in 
<taxonomicName authorityName="A.G.G.Murdock" authorityYear="2008" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Ptisana</emphasis>
</taxonomicName>
but notably absent in 
<taxonomicName lsidName="P. decipiens" pageId="0" pageNumber="1" rank="species" species="decipiens">
<emphasis italics="true" pageId="0" pageNumber="1">P. decipiens</emphasis>
</taxonomicName>
. The rigid, thickened laminae with tightly spaced veins are reminiscent of 
<taxonomicName lsidName="P. rigida" pageId="0" pageNumber="1" rank="species" species="rigida">
<emphasis italics="true" pageId="0" pageNumber="1">P. rigida</emphasis>
</taxonomicName>
(Alderw.) Murdock, a highland species from West Papua. Together with the fact that the DNA sequences from this taxon contain unique autapomorphies, we consider this taxon sufficiently distinctive to recognize as a species. However, due to the available characters apparent on the one collection, the description here is limited and further observation is needed to supplement our understanding of this species. Examination of other collections from the Solomon Islands and Papua New Guinea have so far found no other collections of this wingless species, but we anticipate that the range likely extends beyond New Georgia.
</paragraph>
</subSubSection>
</treatment>
</document>