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<document id="4B0CA40FA271531B36F8489186761821" ID-CLB-Dataset="4196" ID-DOI="10.12782/specdiv.25.25" ID-GBIF-Dataset="d02558bd-d286-4df3-afe4-dddb80e2d3cb" ID-ISSN="2189-7301" ID-Zenodo-Dep="4584042" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1614893725928" checkinUser="felipe" docAuthor="Sato, Masanori, Ebihara, Takumi, Satake, Kiyoshi, Kojima, Shigeaki, Fukumori, Hiroaki &amp; Angsupanich, Saowapa" docDate="2020" docId="FD2E87CAFFB8FF9FC5187D8EBBFBFCDD" docLanguage="en" docName="SpeciesDiversity.25.1.25-38.pdf" docOrigin="Species Diversity 25 (1)" docSource="http://dx.doi.org/10.12782/specdiv.25.25" docStyle="DocumentStyle:27FECD2C3CD153DA405029F2D33C9514.7:SpeciesDiversity.2012-.journal_article" docStyleId="27FECD2C3CD153DA405029F2D33C9514" docStyleName="SpeciesDiversity.2012-.journal_article" docStyleVersion="7" docTitle="Composetia tokashikiensis Sato 2020" docType="treatment" docVersion="17" lastPageNumber="35" masterDocId="0117FFB2FFB1FF95C4167872B824FFF5" masterDocTitle="Distributions and Variations of Two Estuarine Species of Composetia (Annelida: Nereididae) in the Ryukyu Islands, Southern Japan, with a New Record of Composetia tokashikiensis from Thailand" masterLastPageNumber="38" masterPageNumber="25" pageNumber="34" updateTime="1698910780797" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="B0A8A8082DE2C4A6E752CAA0C5FD9C70">Distributions and Variations of Two Estuarine Species of Composetia (Annelida: Nereididae) in the Ryukyu Islands, Southern Japan, with a New Record of Composetia tokashikiensis from Thailand</mods:title>
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<mods:namePart id="E951E84D74BF2CE1EB48CF006C58C11E">Sato, Masanori</mods:namePart>
<mods:affiliation id="0C74F3F57E713173E6A99D8757A24CF4">Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890 - 0065, Japan E-mail: sato @ sci. kagoshima-u. ac. jp &amp; Corresponding author</mods:affiliation>
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<mods:namePart id="3FD5080FAEFB6AFEC01B0B14FBC15EF0">Ebihara, Takumi</mods:namePart>
<mods:affiliation id="6C4C2B307180A2B3F2378B19547C4BAA">Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890 - 0065, Japan E-mail: sato @ sci. kagoshima-u. ac. jp</mods:affiliation>
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<mods:namePart id="8EA17A28C9A7ACEB7D2DDA4D39301931">Satake, Kiyoshi</mods:namePart>
<mods:affiliation id="2F370BBA53F5CA344250E3534509F7FA">National Institute for Environmental Studies, Tsukuba, Ibaraki 305 - 8506, Japan</mods:affiliation>
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<mods:namePart id="B105B229A7496702952784BD9D5B2D35">Kojima, Shigeaki</mods:namePart>
<mods:affiliation id="46B965A38AE830F8DC672BEA83EABACA">Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277 - 8564, Japan</mods:affiliation>
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<mods:namePart id="CDBEF1DE6ABC1F030CE0D0057A30B5D7">Fukumori, Hiroaki</mods:namePart>
<mods:affiliation id="EF3C2C82797833EC11154ECCB7F73DF8">Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277 - 8564, Japan &amp; Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Sesoko, Motobu, Okinawa 905 - 0227, Japan</mods:affiliation>
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<mods:namePart id="5D236E326EA62D610F72319F2CCCCF34">Angsupanich, Saowapa</mods:namePart>
<mods:affiliation id="DB294212447E1CB2D59A610950956752">Marine and Coastal Resources Institute, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand</mods:affiliation>
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<taxonomicName id="B2874D5FFFB8FF9CC5187D8EBAA9F9E1" ID-CoL="85RBR" authority="Sato, 2020" authorityName="Sato" authorityYear="2020" box="[270,653,1532,1556]" class="Polychaeta" family="Nereididae" genus="Composetia" kingdom="Animalia" order="Phyllodocida" pageId="9" pageNumber="34" phylum="Annelida" rank="species" species="tokashikiensis">
<emphasis id="47F3EACEFFB8FF9CC5187D8EBA05F9E1" bold="true" box="[270,545,1532,1556]" italics="true" pageId="9" pageNumber="34">Composetia tokashikiensis</emphasis>
<bibRefCitation id="11164B2DFFB8FF9CC6307D8EBAA9F9E1" author="Sato, M." box="[550,653,1532,1556]" pageId="9" pageNumber="34" pagination="11 - 24" refId="ref13525" refString="Sato, M. 2020. Two new species of Composetia (Annelida: Nereididae) from small estuaries in the Ryukyu Islands, southern Japan, with a list of all species currently belonging to Composetia. Species Diversity 25: 11 - 24." type="journal article" year="2020">Sato, 2020</bibRefCitation>
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(
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<emphasis id="47F3EACEFFB8FF9CC48A7E2CB9BBF983" box="[156,415,1630,1654]" italics="true" pageId="9" pageNumber="34">Composetia tokashikiensis</emphasis>
<bibRefCitation id="11164B2DFFB8FF9CC5B37E2CBA72F983" author="Sato, M." box="[421,598,1630,1654]" pageId="9" pageNumber="34" pagination="11 - 24" refId="ref13525" refString="Sato, M. 2020. Two new species of Composetia (Annelida: Nereididae) from small estuaries in the Ryukyu Islands, southern Japan, with a list of all species currently belonging to Composetia. Species Diversity 25: 11 - 24." type="journal article" year="2020">Sato, 2020: 1720</bibRefCitation>
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, figs 4B, 68.
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<emphasis id="47F3EACEFFB8FF9CC48A7E0DB935F963" box="[156,273,1663,1686]" italics="true" pageId="9" pageNumber="34">Composetia</emphasis>
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sp. A:
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<bibRefCitation id="11164B2DFFB8FF9CC5437E0CBA51F963" author="Sato, M. &amp; Sakaguchi, T." box="[341,629,1662,1686]" pageId="9" pageNumber="34" pagination="83 - 85" refId="ref13624" refString="Sato, M. and Sakaguchi, T. 2016. Nereidid polychaetes inhabiting the land-sea interface in the Amami Islands. Occasional Papers of Research Center for the Pacific Islands, Kagoshima University 57: 83 - 85. [In Japanese]" type="journal article" year="2016">Sato and Sakaguchi 2016: 85</bibRefCitation>
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.
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<emphasis id="47F3EACEFFB8FF9CC48A7EEDB935F943" box="[156,273,1695,1718]" italics="true" pageId="9" pageNumber="34">Composetia</emphasis>
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sp. 1:
<treatmentCitation id="F42610CDFFB8FF9CC5597EEDB9C7F942" author="Sato, M." box="[335,483,1695,1719]" page="483" pageId="9" pageNumber="34" year="2017">
<bibRefCitation id="11164B2DFFB8FF9CC5597EEDB9C7F942" author="Sato, M." box="[335,483,1695,1719]" pageId="9" pageNumber="34" pagination="477 - 512" refId="ref13470" refString="Sato, M. 2017. Nereididae (Annelida) in Japan, with special reference to life-history differentiation among estuarine species. Pp. 477 - 512. In: Motokawa, M. and Kajihara, H. (Eds) Species Diversity of Animals in Japan. Springer Japan, Tokyo." type="book chapter" year="2017">Sato 2017: 483</bibRefCitation>
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.
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<emphasis id="47F3EACEFFB8FF9CC4A37E92B9B9F90D" bold="true" box="[181,413,1760,1784]" pageId="9" pageNumber="34">Materials examined.</emphasis>
<materialsCitation id="C5EF3C81FFB8FF9CC5A17E92BAD8F8CC" ID-GBIF-Occurrence="3358454301" collectingDate="2008-11-19" country="Thailand" latitude="7.1770554" location="One" longLatPrecision="1" longitude="100.54061" municipality="Lagoon" pageId="9" pageNumber="34" specimenCount="1" stateProvince="Songkhla">
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single female (PMBC- 29970), the lower reaches of
<collectingRegion id="B743F83EFFB8FF9CC5A87F72BA39F8ED" box="[446,541,1792,1816]" country="Thailand" name="Songkhla" pageId="9" pageNumber="34">Songkhla</collectingRegion>
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(
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,
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), southern
<collectingCountry id="0D90764CFFB8FF9CC5B47F53B9D9F8CC" box="[418,509,1825,1849]" name="Thailand" pageId="9" pageNumber="34">Thailand</collectingCountry>
,
<date id="0139101CFFB8FF9CC6117F53BAEFF8CC" box="[519,715,1825,1849]" pageId="9" pageNumber="34" value="2008-11-19">
<collectingDate id="117DE9F4FFB8FF9CC6117F53BAEFF8CC" box="[519,715,1825,1849]" pageId="9" pageNumber="34" value="2008-11-19">19 November 2008</collectingDate>
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, coll
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<materialsCitation id="C5EF3C81FFB8FF9CC6EA7F53B88EF8AF" ID-GBIF-Occurrence="3358454303" collectingDate="2008-11-19" country="Thailand" isTailEnumeration="true" latitude="7.1770554" location="One" longLatPrecision="1" longitude="100.54061" municipality="Lagoon" pageId="9" pageNumber="34" specimenCount="1" stateProvince="Songkhla">. S</materialsCitation>
. Angsupanich (
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;
<tableCitation id="38050367FFB8FF9CC59A7F33B9F7F8AF" box="[396,467,1857,1882]" captionStart="Table 1" captionStartId="2.[156,204,190,212]" captionTargetPageId="2" captionText="Table 1. Collection data of two species of Composetia." httpUri="http://table.plazi.org/id/21F86654FFB3FF97C48A78CCBAB1FF21" pageId="9" pageNumber="34" tableUuid="21F86654FFB3FF97C48A78CCBAB1FF21">Table 1</tableCitation>
).
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<subSubSection id="3D9D6557FFB8FF9FC4A37F10BC60FF2B" lastPageId="10" lastPageNumber="35" pageId="9" pageNumber="34" type="description">
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<emphasis id="47F3EACEFFB8FF9CC4A37F10B91DF88F" bold="true" box="[181,313,1890,1914]" pageId="9" pageNumber="34">Description.</emphasis>
Complete individual,
<quantity id="B27F9B39FFB8FF9CC62E7F10BA58F88F" box="[568,636,1890,1914]" metricMagnitude="-2" metricUnit="m" metricValue="1.8" pageId="9" pageNumber="34" unit="mm" value="18.0">18 mm</quantity>
BL, 1.0 mm BW, with 57 chaetigers. Colour in preserved specimen whitish cream with brownish pigmentation in anterior dorsum.
</paragraph>
<paragraph id="753836DCFFB8FF9CC4A37FB6BD26F9A0" blockId="9.[156,768,1760,2077]" lastBlockId="9.[820,1432,1532,2077]" pageId="9" pageNumber="34">
Prostomium pear-shaped (
<figureCitation id="EDBC2A59FFB8FF9CC5DD7FB6BA39F829" box="[459,541,1988,2012]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="9" pageNumber="34">Fig. 8A</figureCitation>
). Antennae short, tapered. Palps with massive palpophores and short subconical palpostyles. Two pairs of eyes arranged trapezoidally, anterior pair reniform, more separated and larger than posterior pair; posterior pair round. Mid-longitudinal white slit present on dorsal anterior surface of prostomium.
</paragraph>
<paragraph id="753836DCFFB8FF9CC7587E2CBCCBF942" blockId="9.[820,1432,1532,2077]" pageId="9" pageNumber="34">Apodous segment (peristomium) with four pairs of tentacular cirri of unequal length; posterior dorsal tentacular cirri longest, reaching back to chaetigers 11.</paragraph>
<paragraph id="753836DCFFB8FF9CC7587ECDBCBDF84E" blockId="9.[820,1432,1532,2077]" pageId="9" pageNumber="34">
Proboscis with pair of amber jaws, each with eight marked teeth. Brown paragnaths present only on maxillary ring (
<figureCitation id="EDBC2A59FFB8FF9CC7897F72BC2AF8EC" box="[927,1038,1792,1817]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="9" pageNumber="34">Fig. 8A, B</figureCitation>
). Paragnath numbers on each area as follows: area I: 0; area II: 13 on left and 16 on right in two arched rows, total 29; area III:
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wide patch; area IV: 14 on each side in triangular patch, total 28. Oral ring greatly enlarged into trapezoidal shape in full-everted proboscis, without any paragnaths or papillae.
</paragraph>
<paragraph id="753836DCFFB8FF9FC7587FB6B8CDFDF6" blockId="9.[820,1432,1532,2077]" lastBlockId="10.[156,768,198,2077]" lastPageId="10" lastPageNumber="35" pageId="9" pageNumber="34">
Sub-biramous parapodia of first 2 chaetigers with thin notoacicula (
<figureCitation id="EDBC2A59FFB8FF9CC7AF7F96BC23F809" box="[953,1031,2020,2044]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="9" pageNumber="34">Fig. 8C</figureCitation>
). Notopodial dorsal ligule conical with tapering tip throughout. Both notopodial prechaetal lobe and notoacicular process absent throughout (
<figureCitation id="EDBC2A59FFBBFF9FC69678B4BA99FF2B" box="[640,701,198,222]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8</figureCitation>
DG). Notopodial ventral ligule conical with tapering tip throughout, almost subequal to notopodial dorsal ligule. Dorsal cirri slender in most chaetigers (relatively thick in chaetiger 5), tapering, as long as or shorter than notopodial dorsal ligule throughout (
<figureCitation id="EDBC2A59FFBBFF9FC508791BB973FE74" box="[286,343,361,385]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8</figureCitation>
CG). Three (rarely two) whitish glandular patches present on dorsal edge of notopodia; distalmost glandular patch larger than others, covering whole conical projection of notopodial dorsal ligule throughout (
<figureCitation id="EDBC2A59FFBBFF9FC6CE79B9B883FDF6" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8</figureCitation>
DG).
</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37A7EBA7DFD12" blockId="10.[156,768,198,2077]" pageId="10" pageNumber="35">
Neuropodial postchaetal lobe with tapering tip present in first 18 chaetigers (
<figureCitation id="EDBC2A59FFBBFF9FC5B87A5EBA05FDB1" box="[430,545,556,580]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8C, D</figureCitation>
), absent in following chaetigers (
<figureCitation id="EDBC2A59FFBBFF9FC5047A3FB959FD90" box="[274,381,589,613]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8F, G</figureCitation>
). Superior lobe in acicular ligule absent throughout. Inferior lobe conical in anterior parapodia, diminishing in middle parapodia, and absent in posterior parapodia. Ventral ligule conical with tapering tip throughout. Ventral cirrus slender with tapering tip.
</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37A9DBAC5FCD2" blockId="10.[156,768,198,2077]" pageId="10" pageNumber="35">Notochaetae all homogomph spinigers, having long blades with finely serrated edge; up to 8 spinigers present.</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37B43B8C4FB7B" blockId="10.[156,768,198,2077]" pageId="10" pageNumber="35">
Upper neurochaetae at superior/anterior position in anterior chaetigers (around first 20 chaetigers) consisting of heterogomph spinigers with short finely-serrated blades (3, 7, and 0 spinigers present in chaetigers 1, 5, and 20, respectively), and few heterogomph falcigers with short finely-serrated blades (
<figureCitation id="EDBC2A59FFBBFF9FC4FC7BA1B90AFC1E" box="[234,302,979,1003]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8J</figureCitation>
) (1, 0, and 2 falcigers present in chaetigers 1, 5, and 20, respectively). Upper neurochaetae at superior/anterior position in posterior chaetigers consisting of only few heterogomph falcigers (0, 2, and 2 falcigers present in chaetigers 44, 46, and 48, respectively), lacking heterogomph spinigers.
</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37CE5BA76FB1A" blockId="10.[156,768,198,2077]" pageId="10" pageNumber="35">
Upper neurochaetae at posterior position consisting of homogomph spinigers with long finely-serrated blades (
<figureCitation id="EDBC2A59FFBBFF9FC6C17CC5B899FB1A" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8H</figureCitation>
) throughout (up to 6 spinigers present).
</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37C8ABAD1F963" blockId="10.[156,768,198,2077]" pageId="10" pageNumber="35">
Lower neurochaetae in anterior chaetigers consisting of many heterogomph spinigers with finely-serrated blades (12, 13 and 4 spinigers present in chaetigers 1, 5 and 20, respectively), and few heterogomph falcigers with short serrated blades (0, 1 and 3 falcigers present in chaetigers 1, 5 and 20, respectively); spinigers with long blades located at posterior position; spinigers with short blades (
<figureCitation id="EDBC2A59FFBBFF9FC6927DC9BAEDFA26" box="[644,713,1467,1491]" captionStart="Fig" captionStartId="9.[156,187,1313,1335]" captionTargetBox="[340,1248,206,1273]" captionTargetId="figure-271@9.[339,1249,205,1274]" captionTargetPageId="9" captionText="Fig. 8. Composetia tokashikiensis Sato, 2020, from Songkhla Lagoon, Thailand (PMBC 29970). A, dorsal views of the anterior body with the everted proboscis; B, ventral view of the everted proboscis; C, posterior view of right parapodium 1; D, posterior view of right parapodium 5; E, anterior view of right parapodium 5; F, posterior view of right parapodium 20. G, posterior view of right parapodium 46. H, homogomph spiniger from upper neurochaetae in parapodium 1; I, heterogomph spiniger with short blade from lower neurochaetae (lower position) in parapodium 5; J, heterogomph falciger from upper neurochaetae in parapodium 1. Abbreviations: g, glandular patch; i, neuropodial inferior lobe; ne, neuroacicula; no, notoacicula; p, neuropodial postchaetal lobe. Scale bars: 1mm (A, B); 0.1mm (CG); 0.05mm (HJ)." figureDoi="http://doi.org/10.5281/zenodo.4584060" httpUri="https://zenodo.org/record/4584060/files/figure.png" pageId="10" pageNumber="35">Fig. 8I</figureCitation>
) and falcigers located at inferior/anterior position. Lower neurochaetae in posterior chaetigers consisting of several heterogomph spinigers at posterior position (5, 5 and 4 spinigers present in chaetigers 44, 46 and 48, respectively), and few heterogomph falcigers at inferior/anterior position (0, 1 and 1 falcigers present in chaetigers 44, 46 and 48, respectively).
</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37EEDB8ECF922" blockId="10.[156,768,198,2077]" pageId="10" pageNumber="35">
The coelom filled with oocytes of
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in diameter.
</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37EADB9A0F84E" blockId="10.[156,768,198,2077]" pageId="10" pageNumber="35">
<emphasis id="47F3EACEFFBBFF9FC4A37EADB928F902" bold="true" box="[181,268,1759,1783]" pageId="10" pageNumber="35">Habitat.</emphasis>
Shallow subtidal bottom in the coast of the lower reaches of
<collectingRegion id="B743F83EFFBBFF9FC5407F72B991F8ED" box="[342,437,1792,1816]" country="Thailand" name="Songkhla" pageId="10" pageNumber="35">Songkhla</collectingRegion>
Lagoon, where salinity widely ranges from 1 to 33 psu depending on variable seasonal rainfall; in general, about 110 psu in November to March, about 1020 psu in April to July, about
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August to October (
<bibRefCitation id="11164B2DFFBBFF9FC5167FF0BA43F86F" author="Angsupanich, S. &amp; Rakkheaw, S." box="[256,615,1922,1946]" pageId="10" pageNumber="35" pagination="297 - 307" refId="ref12739" refString="Angsupanich, S. and Rakkheaw, S. 1997. Seasonal variation of phytoplankton community in Thale Sap Songkhla, a lagoonal lake in southern Thailand. Netherlands Journal of Aquatic Ecology 30: 297 - 307." type="journal article" year="1997">Angsupanich and Rakkheaw 1997</bibRefCitation>
; S. Angsupanich, unpublished data).
</paragraph>
<paragraph id="753836DCFFBBFF9FC4A37FB1BC60FF2B" blockId="10.[156,768,198,2077]" lastBlockId="10.[820,1432,198,808]" pageId="10" pageNumber="35">
<emphasis id="47F3EACEFFBBFF9FC4A37FB1B9FCF82E" bold="true" box="[181,472,1987,2011]" pageId="10" pageNumber="35">Geographical distribution.</emphasis>
The middle and southern Ryukyu Islands in southern
<collectingCountry id="0D90764CFFBBFF9FC5AE7F96B9D4F80E" box="[440,496,2020,2043]" name="Japan" pageId="10" pageNumber="35">Japan</collectingCountry>
(north to Amami-oshima, south to Yonagni-jima), the coast of South
<collectingCountry id="0D90764CFFBBFF9FC6657076BA95F7E9" box="[627,689,2052,2076]" name="China" pageId="10" pageNumber="35">China</collectingCountry>
Sea in southern
<collectingCountry id="0D90764CFFBBFF9FC78378B4BBCAFF2B" box="[917,1006,198,222]" name="Thailand" pageId="10" pageNumber="35">Thailand</collectingCountry>
(
<figureCitation id="EDBC2A59FFBBFF9FC7ED78B4BC11FF2B" box="[1019,1077,198,222]" captionStart="Fig" captionStartId="1.[156,187,1003,1025]" captionTargetBox="[226,1362,206,963]" captionTargetId="figure-544@1.[225,1362,205,964]" captionTargetPageId="1" captionText="Fig. 1. Distributions of two species of Composetia. *Mitochondrial COI gene was analyzed." figureDoi="http://doi.org/10.5281/zenodo.4584044" httpUri="https://zenodo.org/record/4584044/files/figure.png" pageId="10" pageNumber="35">Fig. 1</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="3D9D6557FFBBFF9FC7587895BBFBFCDD" pageId="10" pageNumber="35" type="discussion">
<paragraph id="753836DCFFBBFF9FC7587895BC87FDD6" blockId="10.[820,1432,198,808]" pageId="10" pageNumber="35">
<emphasis id="47F3EACEFFBBFF9FC7587895BB95FF0A" bold="true" box="[846,945,231,255]" pageId="10" pageNumber="35">Remarks.</emphasis>
The morphological characteristics of the present
<collectingCountry id="0D90764CFFBBFF9FC79C7975BBC7FEEA" box="[906,995,263,287]" name="Thailand" pageId="10" pageNumber="35">Thailand</collectingCountry>
specimen agreed well with those of the original description of
<taxonomicName id="B2874D5FFFBBFF9FC035795ABCEFFEB5" authorityName="Sato" authorityYear="2020" box="[1059,1227,296,320]" class="Polychaeta" family="Nereididae" genus="Composetia" kingdom="Animalia" order="Phyllodocida" pageId="10" pageNumber="35" phylum="Annelida" rank="species" species="tokashikiensis">
<emphasis id="47F3EACEFFBBFF9FC035795ABCEFFEB5" box="[1059,1227,296,320]" italics="true" pageId="10" pageNumber="35">C. tokashikiensis</emphasis>
</taxonomicName>
by
<bibRefCitation id="11164B2DFFBBFF9FC0E5795ABD4DFEB5" author="Sato, M." box="[1267,1385,296,320]" pageId="10" pageNumber="35" pagination="11 - 24" refId="ref13525" refString="Sato, M. 2020. Two new species of Composetia (Annelida: Nereididae) from small estuaries in the Ryukyu Islands, southern Japan, with a list of all species currently belonging to Composetia. Species Diversity 25: 11 - 24." type="journal article" year="2020">Sato (2020)</bibRefCitation>
and also of many additional non-type specimens of this species collected from the Ryukyu Islands, southern
<collectingCountry id="0D90764CFFBBFF9FC103791BBD69FE75" box="[1301,1357,361,384]" name="Japan" pageId="10" pageNumber="35">Japan</collectingCountry>
in the present study. All of the numerical characteristics (BW, BL, numbers of total chaetigers, anterior chaetigers, and paragnaths) of the
<collectingCountry id="0D90764CFFBBFF9FC7D479B8BC3FFE17" box="[962,1051,458,482]" name="Thailand" pageId="10" pageNumber="35">Thailand</collectingCountry>
specimen were within the ranges of their variations, which were mentioned above for the Japanese populations (
<figureCitation id="EDBC2A59FFBBFF9FC7FA7A79BC0FFDD6" box="[1004,1067,523,547]" captionStart="Fig" captionStartId="7.[821,852,1414,1436]" captionTargetBox="[823,1430,206,1375]" captionTargetId="figure-290@7.[822,1430,205,1376]" captionTargetPageId="7" captionText="Fig. 6. Geographical variation in the number of paragnaths on areas I (A), II (B), III (C), IV (D) and all areas (E) in proboscis of two species of Composetia collected from 10 localities in the middle and southern Ryukyu Islands, southern Japan. Numbers of paragnaths on the areas II and IV were represented by the larger number in either right or left sides. Average and SD bar are shown in each locality. The number on each datum indicates sample size. The localities are arranged from north to south. Difference of mean numbers between the sympatric populations of C. kumensis and C. tokashikiensis was not significant (NS, P&gt;0.05) or significant (*P&lt;0.05; **P&lt;0.001; ***P&lt;0.0001) by the Mann-Whitney U-test. a, Amami-oshima (site numbers in Fig. 1 and Table 1: 15); b, Kakeromajima (6, 7); c, Kikai-jima (8); d, Tokuno-shima (9); e, Okinawa-jima (1015); f, Tokashiki-jima (16), g1, northern Kume-jima (1720); g2, southern Kume-jima (21); h, Ishigaki-jima (2227); i, Yonaguni-jima (28)." figureDoi="http://doi.org/10.5281/zenodo.4584054" httpUri="https://zenodo.org/record/4584054/files/figure.png" pageId="10" pageNumber="35">Figs 6</figureCitation>
,
<figureCitation id="EDBC2A59FFBBFF9FC0227A7EBC66FDD6" box="[1076,1090,524,547]" captionStart="Fig" captionStartId="8.[821,852,561,583]" captionTargetBox="[823,1430,206,521]" captionTargetId="figure-910@8.[822,1430,205,522]" captionTargetPageId="8" captionText="Fig. 7. Geographical variation in the number of anterior chaetigers of two species of Composetia collected from 10 localities in the middle and southern Ryukyu Islands, southern Japan. Average and SD bar are shown in each locality. The number on each datum indicates sample size. The localities are arranged from north to south. Abbreviations of localities are the same as in Fig. 6. *Difference of mean numbers between the sympatric populations of C. kumensis and C. tokashikiensis was significant (MannWhitney Utest, P=0.0016)." figureDoi="http://doi.org/10.5281/zenodo.4584058" httpUri="https://zenodo.org/record/4584058/files/figure.png" pageId="10" pageNumber="35">7</figureCitation>
;
<tableCitation id="38050367FFBBFF9FC05A7A79BCB2FDD6" box="[1100,1174,523,547]" captionStart="Table 3" captionStartId="4.[158,206,609,631]" captionTargetPageId="4" captionText="Table 3. Variation of morphological characteristics in 21 local populations of Composetia tokashikiensis." httpUri="http://table.plazi.org/id/21F86654FFB5FF91C4887A13BC7DFD83" pageId="10" pageNumber="35" tableUuid="21F86654FFB5FF91C4887A13BC7DFD83">Table 3</tableCitation>
).
</paragraph>
<paragraph id="753836DCFFBBFF9FC7587A5EBBFBFCDD" blockId="10.[820,1432,198,808]" pageId="10" pageNumber="35">
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, the notoacicular process was absent in the
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specimen that was an ovigerous female with BW of 1.0 mm, whereas it was present in a few parapodia in chaetigers
<quantity id="B27F9B39FFBBFF9FC7657AFFBBE4FD50" box="[883,960,653,677]" metricMagnitude="-1" metricUnit="m" metricValue="1.905" metricValueMax="2.54" metricValueMin="1.27" pageId="10" pageNumber="35" unit="in" value="7.5" valueMax="10.0" valueMin="5.0">510 in</quantity>
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and some large
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of
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<emphasis id="47F3EACEFFBBFF9FC1517AFCBD7EFD50" box="[1351,1370,654,677]" italics="true" pageId="10" pageNumber="35">C</emphasis>
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<emphasis id="47F3EACEFFBBFF9FC14C7AFCBBB5FD33" italics="true" pageId="10" pageNumber="35">. tokashikiensis</emphasis>
with a BW of
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or more (
<bibRefCitation id="11164B2DFFBBFF9FC0C87ADCBD6CFD33" author="Sato, M." box="[1246,1352,686,710]" pageId="10" pageNumber="35" pagination="11 - 24" refId="ref13525" refString="Sato, M. 2020. Two new species of Composetia (Annelida: Nereididae) from small estuaries in the Ryukyu Islands, southern Japan, with a list of all species currently belonging to Composetia. Species Diversity 25: 11 - 24." type="journal article" year="2020">Sato 2020</bibRefCitation>
). In the present study, the presence and absence of the notoacicular process was regarded as an intraspecific variation depending on the body size.
</paragraph>
</subSubSection>
</treatment>
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