289 lines
26 KiB
XML
289 lines
26 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.1142.90097" ID-Pensoft-Pub="1313-2970-1142-1" ID-Pensoft-UUID="1D4BDF04F72B59B9984E00D0B4FB338D" ID-ZooBank="A1129EE50F9941CFB73AE771B66E2486" ModsDocID="1313-2970-1142-1" checkinTime="1674655519517" checkinUser="pensoft" docAuthor="Tongkerd, Piyoros, Tumpeesuwan, Sakboworn, Inkhavilay, Khamla, Prasankok, Pongpun, Jeratthitikul, Ekgachai, Panha, Somsak & Sutcharit, Chirasak" docDate="2023" docId="7F939DA8F9B05A34B8D7FBF6186DE2DE" docLanguage="en" docName="ZooKeys 1142: 1-144" docOrigin="ZooKeys 1142" docPubDate="2023-01-24" docSource="http://dx.doi.org/10.3897/zookeys.1142.90097" docTitle="Rhiostoma lannaense Tongkerd & Tumpeesuwan 2023, sp. nov." docType="treatment" docUuid="4DF8B280-2F75-4FFF-B4CD-3287CDCD3309" docUuidSource="ZooBank" docVersion="2" id="1D4BDF04F72B59B9984E00D0B4FB338D" lastPageNumber="1" masterDocId="1D4BDF04F72B59B9984E00D0B4FB338D" masterDocTitle="Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species" masterLastPageNumber="144" masterPageNumber="1" pageNumber="1" updateTime="1674655828358" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Tongkerd, Piyoros</mods:namePart>
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<mods:affiliation>Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Tumpeesuwan, Sakboworn</mods:namePart>
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<mods:affiliation>Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand & Present address: Department of Biology, Faculty of Science, Mahasarakham University, Kantharawichai, Maha Sarakham 44150 Thailand</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Inkhavilay, Khamla</mods:namePart>
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<mods:affiliation>Department of Biology, Faculty of Natural Science, National University of Laos, P. O. Box 7322, Dongdok, Vientiane, Laos</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Prasankok, Pongpun</mods:namePart>
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<mods:affiliation>School of Biology, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Jeratthitikul, Ekgachai</mods:namePart>
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<mods:affiliation>Animal Systematics and Molecular Ecology Laboratory, Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Panha, Somsak</mods:namePart>
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<mods:affiliation>Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand</mods:affiliation>
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<mods:nameIdentifier type="email">somsak.pan@chula.ac.th</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Sutcharit, Chirasak</mods:namePart>
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<mods:affiliation>Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand</mods:affiliation>
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<mods:nameIdentifier type="email">jirasak4@yahoo.com</mods:nameIdentifier>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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||
<mods:part>
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||
<mods:date>2023</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2023-01-24</mods:number>
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</mods:detail>
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<mods:detail type="volume">
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<mods:number>1142</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>144</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.1142.90097</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.1142.90097</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-1142-1</mods:identifier>
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<mods:identifier type="ZooBank">A1129EE50F9941CFB73AE771B66E2486</mods:identifier>
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<mods:identifier type="Pensoft-UUID">1D4BDF04F72B59B9984E00D0B4FB338D</mods:identifier>
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</mods:mods>
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<treatment LSID="urn:lsid:zoobank.org:act:4DF8B280-2F75-4FFF-B4CD-3287CDCD3309" httpUri="http://treatment.plazi.org/id/7F939DA8F9B05A34B8D7FBF6186DE2DE" lastPageNumber="1" pageId="0" pageNumber="1">
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<subSubSection pageId="0" pageNumber="1" type="nomenclature">
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<paragraph pageId="0" pageNumber="1">
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12.
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<taxonomicName LSID="https://zoobank.org/4DF8B280-2F75-4FFF-B4CD-3287CDCD3309" authority="Tongkerd & Tumpeesuwan" authorityName="Tongkerd & Tumpeesuwan" authorityYear="2023" class="Gastropoda" family="Cyclophoridae" genus="Rhiostoma" higherTaxonomySource="treatment-meta" kingdom="Animalia" lsidName="Rhiostoma lannaense" order="Architaenioglossa" pageId="0" pageNumber="1" phylum="Mollusca" rank="species" species="lannaense" status="sp. nov.">Rhiostoma lannaense Tongkerd & Tumpeesuwan</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="description">
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<paragraph pageId="0" pageNumber="1">
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<figureCitation captionStart="Figure 18" captionStartId="F18" captionText="Figure 18. Distribution map of Rhiostoma housei - species group." figureDoi="10.3897/zookeys.1142.90097.figure18" httpUri="https://binary.pensoft.net/fig/799876" pageId="0" pageNumber="1">Figs 18</figureCitation>
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<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">, 30</figureCitation>
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<figureCitation captionStart="Figure 32" captionStartId="F32" captionText="Figure 32. Radula morphology A Rhiostoma housei specimen CUMZ 3982 from Wat Tham Srivilai, Saraburi B Rhiostoma hainesi specimen from Chanthaburi C Rhiostoma jalorensis specimen CUMZ 3994 from Wat Tham Sua, Krabi D Rhiostoma ebenozostera sp. nov. paratype CUMZ 4704 from Tham Pha Poo, Loei E Rhiostoma lannaense sp. nov. paratype CUMZ 4701 from Chiang Dao, Chiang Mai F Rhiostoma tigrina sp. nov. paratype CUMZ 4497 / 2 from Mae Sai, Chiang Rai." figureDoi="10.3897/zookeys.1142.90097.figure32" httpUri="https://binary.pensoft.net/fig/799890" pageId="0" pageNumber="1">, 32E</figureCitation>
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</paragraph>
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||
</subSubSection>
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||
<subSubSection pageId="0" pageNumber="1" type="reference_group">
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName authority="Tongkerd & Tumpeesuwan & Inkhavilay & Prasankok & Jeratthitikul & Panha & Sutcharit, 2023" authorityName="Tongkerd & Tumpeesuwan & Inkhavilay & Prasankok & Jeratthitikul & Panha & Sutcharit" authorityYear="2023" class="Gastropoda" family="Cyclophoridae" genus="Rhiostoma" higherTaxonomySource="treatment-meta" kingdom="Animalia" lsidName="Rhiostoma" order="Architaenioglossa" pageId="0" pageNumber="1" phylum="Mollusca" rank="genus" status="sp. nov.">Rhiostoma</taxonomicName>
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sp. 1-
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<bibRefCitation author="Tumpeesuwan, S" journalOrPublisher="Master Thesis, Department of Biology, Faculty of Science, Chulalongkorn University" pageId="0" pageNumber="1" refId="B175" refString="Tumpeesuwan, S, 2001. Taxonomy of snorkel snails genus Rhiostoma Benson, 1860 in Thailand. Master Thesis, Department of Biology, Faculty of Science, Chulalongkorn University" title="Taxonomy of snorkel snails genus Rhiostoma Benson, 1860 in Thailand." year="2001">Tumpeesuwan 2001</bibRefCitation>
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: 59-64, figs 4.19-4.21 (in part).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="type material">
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<paragraph pageId="0" pageNumber="1">Type material.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Holotype</emphasis>
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CUMZ 4500 (cW 17.1 mm, cH 8.1 mm, dL 35.0 mm; Fig.
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<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">30A</figureCitation>
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).
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Paratypes</emphasis>
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CUMZ 3910 (40 shells), CUMZ 4350 (1 shell), CUMZ 4701 (1 shell; Figs
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<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">30B</figureCitation>
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,
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<figureCitation captionStart="Figure 32" captionStartId="F32" captionText="Figure 32. Radula morphology A Rhiostoma housei specimen CUMZ 3982 from Wat Tham Srivilai, Saraburi B Rhiostoma hainesi specimen from Chanthaburi C Rhiostoma jalorensis specimen CUMZ 3994 from Wat Tham Sua, Krabi D Rhiostoma ebenozostera sp. nov. paratype CUMZ 4704 from Tham Pha Poo, Loei E Rhiostoma lannaense sp. nov. paratype CUMZ 4701 from Chiang Dao, Chiang Mai F Rhiostoma tigrina sp. nov. paratype CUMZ 4497 / 2 from Mae Sai, Chiang Rai." figureDoi="10.3897/zookeys.1142.90097.figure32" httpUri="https://binary.pensoft.net/fig/799890" pageId="0" pageNumber="1">32E</figureCitation>
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), CUMZ 10037 (8 adults + 30 juveniles), CUMZ 10038 (5 shells), NHMUK 20220440 (5 shells), and SMF 368675 (5 shells). All paratypes are from the type locality.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="type locality">
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<paragraph pageId="0" pageNumber="1">Type locality.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Ban Ping Klong (village), Chiangdao District, Chiang Mai Province, Thailand (
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<geoCoordinate degrees="19" direction="north" minutes="30" orientation="latitude" precision="1" seconds="48.6" value="19.5135">19°30'48.6"N</geoCoordinate>
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,
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<geoCoordinate degrees="99" direction="east" minutes="03" orientation="longitude" precision="1" seconds="21.1" value="99.05586">99°03'21.1"E</geoCoordinate>
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). Small limestone hills covered by dry deciduous forest.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Other material examined.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<materialsCitation collectingDate="2023-01-01" collectingDateMax="2023-12-31" collectingDateMin="2023-01-01" country="Thailand" elevation="200" location="Chiang Mai" specimenCount="200" stateProvince="Chiang Mai">
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<emphasis bold="true" pageId="0" pageNumber="1">
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<collectingCountry name="Thailand">Thailand</collectingCountry>
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</emphasis>
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: Tham Sam Ta, Muang, Maehongsorn: CUMZ 4804. 1 km. from the junction to Tham Mae Ra Na, Pang Mapha, Maehongsorn: CUMZ 4440, 4464. Pang Mapha, Maehongsorn: CUMZ 4341. Tham Mae Lana, Pang Mapha, Maehongsorn: CUMZ 4702 (Fig.
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<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">30C, D</figureCitation>
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), 10042, 10043 (Fig.
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<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">30E</figureCitation>
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). Tham Pha Mon, Pang Mapha, Maehongsorn: CUMZ 4343. Tham Phadeang, Pang Mapha, Maehongsorn: CUMZ 10040. Wat Pa Tham Wua, Pang Mapha, Maehongsorn: CUMZ 10036. Tham Tabtao, Chai Prakarn,
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<collectingRegion country="Thailand" name="Chiang Mai">Chiang Mai</collectingRegion>
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: CUMZ 3912, 10041 (Fig.
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<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">30F</figureCitation>
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). Chaiprakarn, km. 43 reach Chiang Dao,
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<collectingRegion country="Thailand" name="Chiang Mai">Chiang Mai</collectingRegion>
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: CUMZ 4738. Km. 93+
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<specimenCount type="generic">
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<quantity metricMagnitude="2" metricUnit="m" metricValue="2.0" unit="m" value="200.0">
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<elevation metricMagnitude="2" metricUnit="m" metricValue="2.0" unit="m" value="200.0">200 m</elevation>
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</quantity>
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.
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</specimenCount>
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Tham Klap, Pingkong, Chiang Dao,
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<collectingRegion country="Thailand" name="Chiang Mai">Chiang Mai</collectingRegion>
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: CUMZ 3908, 10039. Pa Sak Ngam, Doi Saket,
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<collectingRegion country="Thailand" name="Chiang Mai">Chiang Mai</collectingRegion>
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: CUMZ 4754. Huai Nam Dang, Mae Tang,
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<collectingRegion country="Thailand" name="Chiang Mai">Chiang Mai</collectingRegion>
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: CUMZ 10033
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</materialsCitation>
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.
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</paragraph>
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<caption doi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1" start="Figure 30" startId="F30">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 30.</emphasis>
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Shell of
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<taxonomicName authorityName="Tongkerd & Tumpeesuwan" authorityYear="2023" class="Gastropoda" family="Cyclophoridae" genus="Rhiostoma" kingdom="Animalia" lsidName="Rhiostoma lannaense" order="Architaenioglossa" pageId="0" pageNumber="1" phylum="Mollusca" rank="species" species="lannaense">
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<emphasis italics="true" pageId="0" pageNumber="1">Rhiostoma lannaense</emphasis>
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</taxonomicName>
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sp. nov.
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<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
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<typeStatus>holotype</typeStatus>
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CUMZ 4500 from Pingkong, Chiang Dao,
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<collectingRegion country="Thailand" name="Chiang Mai">Chiang Mai</collectingRegion>
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<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
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<typeStatus>paratype</typeStatus>
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CUMZ 4701 from type locality
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<emphasis bold="true" pageId="0" pageNumber="1">C, D</emphasis>
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<typeStatus>paratypes</typeStatus>
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CUMZ 4721 from type locality
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<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
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specimen CUMZ 10043 from Pang Mapha, Maehongsorn
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<emphasis bold="true" pageId="0" pageNumber="1">F</emphasis>
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specimen CUMX 10041 from Chai Prakan,
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<collectingRegion country="Thailand" name="Chiang Mai">Chiang Mai</collectingRegion>
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="diagnosis">
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<paragraph pageId="0" pageNumber="1">Diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="1">Shell small to medium, thin, and flattened to depressed shell. Detached whorl long, slender, curved, and descending. Breathing device tubular. Shell colour with dark brown zigzag patterns. Operculum calcareous, tall cup-shaped with loose lamellae.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="differential diagnosis">
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<paragraph pageId="0" pageNumber="1">Differential diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName authorityName="Tongkerd & Tumpeesuwan" authorityYear="2023" class="Gastropoda" family="Cyclophoridae" genus="Rhiostoma" kingdom="Animalia" lsidName="Rhiostoma lannaense" order="Architaenioglossa" pageId="0" pageNumber="1" phylum="Mollusca" rank="species" species="lannaense">
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<emphasis italics="true" pageId="0" pageNumber="1">Rhiostoma lannaense</emphasis>
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</taxonomicName>
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sp. nov. differs from
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<taxonomicName lsidName="R. marioni" pageId="0" pageNumber="1" rank="species" species="marioni">
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<emphasis italics="true" pageId="0" pageNumber="1">R. marioni</emphasis>
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</taxonomicName>
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,
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<taxonomicName lsidName="R. thachi" pageId="0" pageNumber="1" rank="species" species="thachi">
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<emphasis italics="true" pageId="0" pageNumber="1">R. thachi</emphasis>
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</taxonomicName>
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, and
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<taxonomicName lsidName="R. jalorensis" pageId="0" pageNumber="1" rank="species" species="jalorensis">
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<emphasis italics="true" pageId="0" pageNumber="1">R. jalorensis</emphasis>
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</taxonomicName>
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in having a whitish shell with a dark brown zigzag pattern and longer detached whorl. In contrast, these three species exhibit uniformly brownish to dark brown shells and generally without a colour pattern and a relatively shorter detached whorl. In addition,
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<taxonomicName lsidName="R. thachi" pageId="0" pageNumber="1" rank="species" species="thachi">
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<emphasis italics="true" pageId="0" pageNumber="1">R. thachi</emphasis>
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</taxonomicName>
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has a broader expanded aperture on the palatal side, while this new species has a thickened but not expanded lip.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
|
||
This new species is superficially similar to
|
||
<taxonomicName lsidName="R. tigrina" pageId="0" pageNumber="1" rank="species" species="tigrina">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">R. tigrina</emphasis>
|
||
</taxonomicName>
|
||
sp. nov., but it can be distinguished by having very long and curved detached whorl, aperture opened ventrally, and tall cup-shaped operculum with looser lamellae. In contrast, the latter species has a shorter detached whorl, aperture opened sub-ventrally and low cup-shaped operculum with denser lamellae. Although these two species are mainly distributed in northern Thailand, the COI barcoding shows high genetic diversity (Appendix 1: Table
|
||
<tableCitation captionStart="Table A1" captionStartId="T3" captionText="Table A 1. Average interspecific genetic divergence (uncorrected p-distance: % + / - S. E.) between Rhiostoma species (below diagonal) calculated from 660 - bp COI gene fragment sequences. Average intraspecific distances within each species are shown in bold." httpUri="http://table.plazi.org/id/1930790639920CDD2BC9199E713D3C49" pageId="0" pageNumber="1" tableUuid="1930790639920CDD2BC9199E713D3C49">A1</tableCitation>
|
||
) and divided
|
||
<taxonomicName lsidName="R. lannaense" pageId="0" pageNumber="1" rank="species" species="lannaense">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">R. lannaense</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. as a distinct clade from other northern species, which suggests they are distinct species (Fig.
|
||
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Maximum likelihood (ML) tree showing the relationships among Rhiostoma species based on 660 bp of the mitochondrial COI gene sequence. The major nodes are indicated by numbers as the Maximum likelihood (ML) bootstrap values and Bayesian posterior probabilities of Bayesian inference (BI), respectively. Nodes with sufficient support by both ML and BI are indicated by black circles, and nodes with partial support by only ML are indicated by grey circles, and only BI by white circles. Newly described species in this study are highlighted in blue." figureDoi="10.3897/zookeys.1142.90097.figure3" httpUri="https://binary.pensoft.net/fig/799861" pageId="0" pageNumber="1">3</figureCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="description">
|
||
<paragraph pageId="0" pageNumber="1">Description.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" pageId="0" pageNumber="1">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Shell</emphasis>
|
||
.
|
||
</emphasis>
|
||
Shell small to medium, cW 14.5-19.3 mm, cH 7.3-10.1 mm, thin, and nearly flattened to sub-discoidal shape; detached-whorl length 19.5-28.5 mm. Apex acute with dark colouration; spire convex to nearly flat. Whorls 4 to 5, convex, increasing regularly; suture wide and shallow; last whorl rounded and slender. Shell surface with fine growth lines. Periostracum corneous and transparent. Shell colour with brown to dark brown zigzag pattern and faded on ventral shell surface; narrow black spiral band on periphery. Detached whorl long, ~3
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
longer than aperture width, curved, and descending. Peristome circular and double; lip thickened, slightly expanded and multi-layered. Aperture opened sub-ventrally to ventrally. Breathing device tubular and its tip sometimes attached to preceding whorl; outer lip forming a short to long and closed tube, and located just behind apertural lip; inner lip with deep incision or small hole inside aperture. Umbilicus widely opened and deep. Operculum calcareous, tall cup-shaped, and multispiral with loose lamellae (Fig.
|
||
<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">30</figureCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" pageId="0" pageNumber="1">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Radula</emphasis>
|
||
.
|
||
</emphasis>
|
||
Teeth arrangement and shape are similar to those of
|
||
<taxonomicName lsidName="R. housei" pageId="0" pageNumber="1" rank="species" species="housei">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">R. housei</emphasis>
|
||
</taxonomicName>
|
||
. Central tooth with large pointed central cusp; two lateral cusps on each side with small pointed tips. Lateral teeth consisting of four cusps; central cusp large, with dull tip, and flanked by two inner cusps and one small outer cusp. Marginal teeth each consisting of three pointed cusps (Fig.
|
||
<figureCitation captionStart="Figure 32" captionStartId="F32" captionText="Figure 32. Radula morphology A Rhiostoma housei specimen CUMZ 3982 from Wat Tham Srivilai, Saraburi B Rhiostoma hainesi specimen from Chanthaburi C Rhiostoma jalorensis specimen CUMZ 3994 from Wat Tham Sua, Krabi D Rhiostoma ebenozostera sp. nov. paratype CUMZ 4704 from Tham Pha Poo, Loei E Rhiostoma lannaense sp. nov. paratype CUMZ 4701 from Chiang Dao, Chiang Mai F Rhiostoma tigrina sp. nov. paratype CUMZ 4497 / 2 from Mae Sai, Chiang Rai." figureDoi="10.3897/zookeys.1142.90097.figure32" httpUri="https://binary.pensoft.net/fig/799890" pageId="0" pageNumber="1">32E</figureCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="etymology">
|
||
<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The specific name
|
||
<emphasis italics="true" pageId="0" pageNumber="1">lannaense</emphasis>
|
||
is derived from the historical name of the Lan Na Kingdom, which flourished approximately from the 13th to 18th centuries. It refers to the distribution range of this new species in the northern part of Thailand, which is the approximate centre of the Lan Na Kingdom.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="distribution">
|
||
<paragraph pageId="0" pageNumber="1">Distribution.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
This new species has a narrow distribution range in a few localities in Chiang Mai and Maehongsorn provinces (Fig.
|
||
<figureCitation captionStart="Figure 18" captionStartId="F18" captionText="Figure 18. Distribution map of Rhiostoma housei - species group." figureDoi="10.3897/zookeys.1142.90097.figure18" httpUri="https://binary.pensoft.net/fig/799876" pageId="0" pageNumber="1">18</figureCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="remarks">
|
||
<paragraph pageId="0" pageNumber="1">Remarks.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
There are two morphotypes occurring in this species. The typical morphotype has a long and curved detached whorl, and the tubular breathing device does not reach the preceding whorl. The shorter morphotype has a short, detached whorl, and the tubular breathing device reaches the preceding whorl (Fig.
|
||
<figureCitation captionStart="Figure 30" captionStartId="F30" captionText="Figure 30. Shell of Rhiostoma lannaense sp. nov. A holotype CUMZ 4500 from Pingkong, Chiang Dao, Chiang Mai B paratype CUMZ 4701 from type locality C, D paratypes CUMZ 4721 from type locality E specimen CUMZ 10043 from Pang Mapha, Maehongsorn F specimen CUMX 10041 from Chai Prakan, Chiang Mai" figureDoi="10.3897/zookeys.1142.90097.figure30" httpUri="https://binary.pensoft.net/fig/799888" pageId="0" pageNumber="1">30D</figureCitation>
|
||
). These two morphotypes are sympatric, and also have brownish zigzag colour patterns and a tall cup-shaped operculum with loose lamellae. However, the shell morphologies together with COI barcoding suggest these are conspecific.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |