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<mods:title id="DDD64842AF44AEA032F8AAA93BC55BCC">Three new species of the fern genus Arachniodes (Dryopteridaceae) from Vietnam</mods:title>
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<mods:namePart id="B2917937E3034CC1CFF2620A2CCFD977">Lu, Ngan Thi</mods:namePart>
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<mods:namePart id="5ED96D2D04F376A77D7219EF988153F6">Zhang, Liang</mods:namePart>
<mods:affiliation id="F49B4D1F8A2191DCC89D8778B4CAF8EA">Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China.</mods:affiliation>
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<mods:namePart id="C49A04F4203D03276F10CC90D5002113">Zhou, Xin-Mao</mods:namePart>
<mods:affiliation id="B1E6EC4D2D8028B7DA828A1565BD0720">School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, Yunnan, China;</mods:affiliation>
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<mods:affiliation id="D57F152EE6EF22A76B11EC770F58E822">CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P. O. Box 416, Chengdu, Sichuan 610041, China</mods:affiliation>
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<mods:namePart id="51643BD3F4E4E7C78B77F3B2C1132E58">Zhang, Li-Bing</mods:namePart>
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<heading id="3326265428304718AE85577AFA2FF8B3" box="[136,1437,1850,1877]" centered="true" fontSize="11" level="2" pageId="4" pageNumber="130" reason="3">
<taxonomicName id="AFD1EABB28304718AE85577AFC6AF8B3" ID-CoL="G33F" authority="Li Bing Zhang, Ngan Thi Lu &amp; Liang Zhang" authorityName="Li Bing Zhang, Ngan Thi Lu &amp; Liang Zhang" authorityYear="2018" box="[136,984,1850,1877]" class="Polypodiopsida" family="Dryopteridaceae" genus="Arachniodes" kingdom="Plantae" order="Polypodiales" pageId="4" pageNumber="130" phylum="Tracheophyta" rank="species" species="quangnamensis" status="sp. nov.">
<emphasis id="5AA54D2A28304718AE85577AFE65F8B2" bold="true" box="[136,471,1850,1877]" italics="true" pageId="4" pageNumber="130">Arachniodes quangnamensis</emphasis>
Li Bing Zhang, Ngan Thi Lu &amp; Liang Zhang
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,
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<taxonomicNameLabel id="4196F05128304718ADEE577CFB8AF8B3" box="[995,1080,1852,1877]" pageId="4" pageNumber="130" rank="species">sp. nov.</taxonomicNameLabel>
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<figureCitation id="F0EA8DBD28304718AA33577CFB73F8B3" box="[1086,1217,1852,1877]" captionStart="FIGURE 1" captionStartId="1.[136,229,1623,1644]" captionTargetBox="[298,1290,315,1598]" captionTargetId="figure-73@1.[298,1290,314,1598]" captionTargetPageId="1" captionText="FIGURE 1. AH. Arachniodes quangnamensis Li Bing Zhang, N.T. Lu &amp; Liang Zhang,—A &amp; B. Habit.—C. Sterile frond.—D. Lower portion of plant.—E. Fertile frond.—F. Portion of frond showing basal pinnae.—G. Portion of rachis and pinna.—H. Portion of pinnule showing sori and microscales. JP. A. daklakensis Li Bing Zhang, N.T. Lu &amp; X.M.Zhou.—J. Fronds.—K &amp; M. Lowest pinnae.—L. Stipe base.—N. Lamina apex.—O. Portions of lateral pinnae.—P. Portion of pinnule showing sori." figureDoi="http://doi.org/10.5281/zenodo.13726656" httpUri="https://zenodo.org/record/13726656/files/figure.png" pageId="4" pageNumber="130">
Figs. 1A
<emphasis id="5AA54D2A28304718AA92577EFB1FF8B2" box="[1183,1197,1854,1876]" italics="true" pageId="4" pageNumber="130"></emphasis>
H
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&amp;
<figureCitation id="F0EA8DBD28304718AAE8577CFA2BF8B3" box="[1253,1433,1852,1877]" captionStart="FIGURE 3" captionStartId="3.[136,229,1862,1883]" captionTargetBox="[151,1436,190,1835]" captionTargetId="figure-18@3.[151,1436,190,1837]" captionTargetPageId="3" captionText="FIGURE 3. The morphology of scales, spores, and indusia. AC, H, I &amp; L. Arachniodes quangnamensis.—A. Rhizome scales.—B. Scales from stipe base.—C. Scales from distal portion of stipe.—H &amp; I. SEM photographs of spores.—L. Ciliate indusia. D, E, J, K &amp; N. A. longicaudata.—D. Scales from stipe base.—E. Scales from distal portion of stipe.—J &amp; K. SEM photographs of spores.—N. Indusia with long and hairlike ciliate. F, G &amp; M. A. daklakensis.—F. Scales from stipe base.—G. Scales from distal portion of stipe.—M. Indusia with long and hairlike ciliate." figureDoi="http://doi.org/10.5281/zenodo.13726662" httpUri="https://zenodo.org/record/13726662/files/figure.png" pageId="4" pageNumber="130">
3A
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C, H, I &amp; L
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.
</heading>
</paragraph>
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Type:—
<collectingCountry id="10C6D1A828304718AEDB5722FEFAF891" box="[214,328,1890,1911]" name="Vietnam" pageId="4" pageNumber="130">VIETNAM</collectingCountry>
. Quangnam Province: Songthanh Nature reserve, elev.
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,
<date id="1C6FB7F828304718ADC35722FBC8F891" box="[974,1146,1890,1911]" pageId="4" pageNumber="130" value="2014-12-05">5 December 2014</date>
,
<emphasis id="5AA54D2A28304718AA8E5722FEDFF87D" italics="true" pageId="4" pageNumber="130">Li Bing Zhang, Liang Zhang &amp; Ngan Thi Lu 7926</emphasis>
(
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!,
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!,
<collectionCode id="0EC009FD28304718ACD957C6FCB0F87D" box="[724,770,1926,1947]" country="USA" lsid="urn:lsid:biocol.org:col:15859" name="Missouri Botanical Garden" pageId="4" pageNumber="130" type="Herbarium">MO</collectionCode>
!).
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Diagnosis:—This species resembles
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<emphasis id="5AA54D2A28304718AFE157EAFCB4F859" box="[492,774,1962,1983]" italics="true" pageId="4" pageNumber="130">Arachniodes dimorphophylla</emphasis>
(
<bibRefCitation id="0C40ECC928304718AD1957EAFC71F859" author="Hayata, B." box="[788,963,1962,1983]" pageId="4" pageNumber="130" pagination="1 - 471" refId="ref3830" refString="Hayata, B. (1911) Materials for a flora of Formosa. Journal of the College of Science, Imperial University of Tokyo 30 (1): 1 - 471." type="journal article" year="1911">Hayata 1911: 428</bibRefCitation>
) Ching (1962: 257)
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in having fronds dimorphous, fertile fronds lanceolate, longer but narrower than sterile fronds, sterile fronds ovate-lanceolate, and sori small (
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in diam.) and closer to midribs than to segment margins, but the former bears rhizomes suberect or ascending (creeping rhizomes unseen), laminae more shallowly dissected, often 2-pinnate-pinnatifid, basal basiscopic segments of lowest pinnae less elongated, and indusia ciliate; in contrast, the latter has rhizomes often short-creeping, laminae 3-pinnate, basal basiscopic segments of lowest pinnae longelongated, and indusia entire.
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Rhizome erect or ascending, 1.24.2 ×
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, with remnant bases of old stipes, up to 18 fronds each rhizome; ca. 35 roots,
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×
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, apex densely scaly; scales (brown to red-brown), linear-narrow lanceolate, tip tortuous, 410 × 0.31.0 mm, entire, membranous. Fronds dimorphic,
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. Sterile lamina 1432 ×
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, stipe
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×
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, base with scales similar to those on rhizome, scales sparser upward, blackish, thread linear, 46 ×
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, entire and thicker; lamina 2 pinnate-pinnatifid, green when dried, deltoid-lanceolate, papery, base acute, apex acuminate; rachis scaly as distal portion of stipe, sparse scales adaxially; pinnae 1222 pairs, lowest pinnae 414 ×
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, stalks ca.
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, upper shorter even sessile, alternate, spreading, lanceolate or deltoid-lanceolate, base rounded or broadly cuneate, apex acute or obtuse; pinnules 514 pairs per pinna, shortly stalked, oblong, deltoid-lanceolate, sometimes elliptical-oval, 1.01.5 ×
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, base acroscopically rounded, obtuse, cuneate basiscopically cuneate, apex obtuse, margin often aristate; costule, vein sparse minute brown filiform scales abaxially. Fertile fronds up to 75 ×
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; lamina similar to that of sterile fronds in shape and dissection, often longer than sterile but narrower, papery to subleathery; pinnae 1224 pairs, lowest pinnae 411.2 ×
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, lanceolate, alternate, base acute, oblique-cordate, apex acute or acuminate; pinnule 813 pairs, lanceolate or oblong, 0.51.0 × 1.0
<quantity id="AF293CDD28314719AF3E529DFE34FD10" box="[307,390,733,758]" metricMagnitude="-2" metricUnit="m" metricValue="2.8" pageId="5" pageNumber="131" unit="cm" value="2.8">2.8 cm</quantity>
, base acroscopically truncate, obtuse, basiscopically cuneate, apex obtuse, margin lobed or pinnatifid, mucronate teeth. Sori small (ca. 2.0 mm), terminal on veinlets, approximate, 29 pairs per ultimate segment, closer to midvein than margin; spores elliptical
<typeStatus id="B76A2F9A28314719ACAA5365FD68FCD8" box="[679,730,805,830]" pageId="5" pageNumber="131">type</typeStatus>
, 3138 × 3546 um, inflated, echinate folder; indusia brown to dark brown, membranous, ciliate or irregularly denticulate on margin (ca.
<quantity id="AF293CDD28314719ADCA5309FB93FC84" box="[967,1057,841,866]" metricMagnitude="-3" metricUnit="m" metricValue="2.4" pageId="5" pageNumber="131" unit="mm" value="2.4">2.4 mm</quantity>
).
</paragraph>
</subSubSection>
<subSubSection id="20CBC2B328314719AEB0532DFCA3FC4C" pageId="5" pageNumber="131" type="etymology">
<paragraph id="686E913828314719AEB0532DFCA3FC4C" blockId="5.[136,1452,265,1262]" pageId="5" pageNumber="131">
<emphasis id="5AA54D2A28314719AEB0532DFED6FC60" bold="true" box="[189,356,877,902]" pageId="5" pageNumber="131">Etymology:—</emphasis>
From
<emphasis id="5AA54D2A28314719AFA7532DFD92FC60" box="[426,544,877,902]" italics="true" pageId="5" pageNumber="131">quangnam</emphasis>
, the province name in central
<collectingCountry id="10C6D1A828314719AD88532DFC55FC60" box="[901,999,877,902]" name="Vietnam" pageId="5" pageNumber="131">Vietnam</collectingCountry>
, and the Latin ending
<emphasis id="5AA54D2A28314719AAE3532DFA82FC60" box="[1262,1328,877,902]" italics="true" pageId="5" pageNumber="131">-ensis</emphasis>
, of origin, referring to the
<typeStatus id="B76A2F9A28314719AF3A53D1FED5FC4C" box="[311,359,913,938]" pageId="5" pageNumber="131">type</typeStatus>
locality where we collected the plant.
</paragraph>
</subSubSection>
<subSubSection id="20CBC2B328314719AEB053F5FAA7FB08" pageId="5" pageNumber="131" type="distribution">
<paragraph id="686E913828314719AEB053F5FF5DFC14" blockId="5.[136,1452,265,1262]" pageId="5" pageNumber="131">
<emphasis id="5AA54D2A28314719AEB053F5FEC7FC28" bold="true" box="[189,373,949,974]" pageId="5" pageNumber="131">Distribution:—</emphasis>
This species is currently only known from the
<typeStatus id="B76A2F9A28314719AD8553F5FC0AFC28" box="[904,952,949,974]" pageId="5" pageNumber="131">type</typeStatus>
locality and probably is endemic to Central
<collectingCountry id="10C6D1A828314719AE855399FF59FC14" box="[136,235,985,1010]" name="Vietnam" pageId="5" pageNumber="131">Vietnam</collectingCountry>
.
</paragraph>
<paragraph id="686E913828314719AEB053BDFDC2FB40" blockId="5.[136,1452,265,1262]" pageId="5" pageNumber="131">
<emphasis id="5AA54D2A28314719AEB053BDFE94FBF0" bold="true" box="[189,294,1021,1046]" pageId="5" pageNumber="131">Notes:—</emphasis>
In addition to
<taxonomicName id="AFD1EABB28314719AFC053BDFCA0FBF0" authorityName="Li Bing Zhang, Ngan Thi Lu &amp; Liang Zhang" authorityYear="2018" box="[461,786,1021,1046]" class="Polypodiopsida" family="Dryopteridaceae" genus="Arachniodes" kingdom="Plantae" order="Polypodiales" pageId="5" pageNumber="131" phylum="Tracheophyta" rank="species" species="quangnamensis">
<emphasis id="5AA54D2A28314719AFC053BDFCA0FBF0" box="[461,786,1021,1046]" italics="true" pageId="5" pageNumber="131">Arachniodes quangnamensis</emphasis>
</taxonomicName>
, there are two more species in the genus with dimorphic fronds:
<taxonomicName id="AFD1EABB28314719AEE95461FCF3FBDC" authority="(Ching 1934: 44) Ching (1962: 258)" authorityName="Ching" authorityPageNumber="258" authorityYear="1962" baseAuthorityName="Ching" baseAuthorityPageNumber="44" baseAuthorityYear="1934" box="[228,833,1057,1082]" class="Polypodiopsida" family="Dryopteridaceae" genus="Arachniodes" kingdom="Plantae" order="Polypodiales" pageId="5" pageNumber="131" phylum="Tracheophyta" rank="species" species="hainanenis">
<emphasis id="5AA54D2A28314719AEE95461FE31FBDC" box="[228,387,1057,1082]" italics="true" pageId="5" pageNumber="131">A. hainanenis</emphasis>
(Ching 1934: 44) Ching (1962: 258)
</taxonomicName>
(
<typeStatus id="B76A2F9A28314719AD585461FC39FBDC" box="[853,907,1057,1082]" pageId="5" pageNumber="131">type</typeStatus>
:
<collectingRegion id="AA155FDA28314719AD975461FC5CFBDC" box="[922,1006,1057,1082]" country="China" name="Hainan" pageId="5" pageNumber="131">Hainan</collectingRegion>
,
<collectingCountry id="10C6D1A828314719ADF25461FBF6FBDC" box="[1023,1092,1057,1082]" name="China" pageId="5" pageNumber="131">China</collectingCountry>
) and
<taxonomicName id="AFD1EABB28314719AA815461FAD1FBDC" authorityName="Ching" authorityYear="1962" baseAuthorityName="Hayata" baseAuthorityYear="1911" box="[1164,1379,1057,1082]" class="Polypodiopsida" family="Dryopteridaceae" genus="Arachniodes" kingdom="Plantae" order="Polypodiales" pageId="5" pageNumber="131" phylum="Tracheophyta" rank="species" species="dimorphophylla">
<emphasis id="5AA54D2A28314719AA815461FAD1FBDC" box="[1164,1379,1057,1082]" italics="true" pageId="5" pageNumber="131">A. dimorphophylla</emphasis>
</taxonomicName>
(
<typeStatus id="B76A2F9A28314719AB7F5461FA1AFBDC" box="[1394,1448,1057,1082]" pageId="5" pageNumber="131">type</typeStatus>
:
<collectingRegion id="AA155FDA28314719AE855405FF42FBB8" box="[136,240,1093,1118]" country="Japan" name="Okinawa" pageId="5" pageNumber="131">Okinawa</collectingRegion>
,
<collectingCountry id="10C6D1A828314719AEF35405FEF1FBB8" box="[254,323,1093,1118]" name="Japan" pageId="5" pageNumber="131">Japan</collectingCountry>
). Phylogenetically,
<taxonomicName id="AFD1EABB28314719AC2F5405FD43FBB8" authorityName="Li Bing Zhang, Ngan Thi Lu &amp; Liang Zhang" authorityYear="2018" box="[546,753,1093,1118]" class="Polypodiopsida" family="Dryopteridaceae" genus="Arachniodes" kingdom="Plantae" order="Polypodiales" pageId="5" pageNumber="131" phylum="Tracheophyta" rank="species" species="quangnamensis">
<emphasis id="5AA54D2A28314719AC2F5405FD43FBB8" box="[546,753,1093,1118]" italics="true" pageId="5" pageNumber="131">A. quangnamensis</emphasis>
</taxonomicName>
was resolved as sister to
<taxonomicName id="AFD1EABB28314719AA105405FB76FBB8" authorityName="Ching" authorityYear="1962" baseAuthorityName="Ching" baseAuthorityYear="1934" box="[1053,1220,1093,1118]" class="Polypodiopsida" family="Dryopteridaceae" genus="Arachniodes" kingdom="Plantae" order="Polypodiales" pageId="5" pageNumber="131" phylum="Tracheophyta" rank="species" species="hainanensis">
<emphasis id="5AA54D2A28314719AA105405FB76FBB8" box="[1053,1220,1093,1118]" italics="true" pageId="5" pageNumber="131">A. hainanensis</emphasis>
</taxonomicName>
, while the Japanese dimorphic species was nested in other clade (Lu
<emphasis id="5AA54D2A28314719ACA85429FD6FFB64" box="[677,733,1129,1154]" italics="true" pageId="5" pageNumber="131">et al.</emphasis>
, submitted).
<bibRefCitation id="0C40ECC928314719AD7D5429FBADFB64" author="He, H. &amp; Wu, S. - G. &amp; Xiang, J. - Y. &amp; Barrington, D. S." box="[880,1055,1129,1154]" pageId="5" pageNumber="131" pagination="542 - 558" refId="ref3960" refString="He, H., Wu, S. - G., Xiang, J. - Y. &amp; Barrington, D. S. (2013) Arachniodes Blume. In: Wu, Z. - Y., Raven, P. H. &amp; Hong, D. - Y. (Eds.) Flora of China, Vols. 2 - 3. pp. 542 - 558." type="book chapter" year="2013">
He
<emphasis id="5AA54D2A28314719AD9A5429FC7CFB64" box="[919,974,1129,1154]" italics="true" pageId="5" pageNumber="131">et al.</emphasis>
(2013)
</bibRefCitation>
noted a dimorphic species reported from
<collectingCountry id="10C6D1A828314719AEC854CDFEA8FB40" box="[197,282,1165,1190]" name="Taiwan" pageId="5" pageNumber="131">Taiwan</collectingCountry>
, which needs to be confirmed.
</paragraph>
<paragraph id="686E913828314719AEB054F1FAA7FB08" blockId="5.[136,1452,265,1262]" pageId="5" pageNumber="131">
<emphasis id="5AA54D2A28314719AEB054F1FDF8FB2C" bold="true" box="[189,586,1201,1226]" pageId="5" pageNumber="131">Additional material examined:—</emphasis>
<collectingCountry id="10C6D1A828314719AC4754F1FD7DFB2C" box="[586,719,1201,1226]" name="Vietnam" pageId="5" pageNumber="131">VIETNAM</collectingCountry>
. Quangnam Province: Songthanh Nature Reserve, elev.
<quantity id="AF293CDD28314719AB4454F1FF12FB08" metricMagnitude="2" metricUnit="m" metricValue="4.3" metricValueMax="4.6" metricValueMin="4.0" pageId="5" pageNumber="131" unit="m" value="430.0" valueMax="460.0" valueMin="400.0">400460 m</quantity>
,
<date id="1C6FB7F828314719AEA15495FEC4FB08" box="[172,374,1237,1262]" pageId="5" pageNumber="131" value="2014-12-05">5 December 2014</date>
,
<emphasis id="5AA54D2A28314719AF8C5495FC45FB08" box="[385,1015,1237,1262]" italics="true" pageId="5" pageNumber="131">Li Bing Zhang, Liang Zhang &amp; Ngan Thi Lu 7915, 1918</emphasis>
(CDBI!, MO!, VNMN!).
</paragraph>
</subSubSection>
</treatment>
</document>