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205 lines
28 KiB
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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.1132.91244" ID-Pensoft-Pub="1313-2970-1132-85" ID-Pensoft-UUID="E57A2873FAAC552282A3E1390FF28D3E" ID-ZooBank="4168C32E37A74912A9094912E69030AA" ModsDocID="1313-2970-1132-85" checkinTime="1669726345720" checkinUser="pensoft" docAuthor="Barroso, Maria, Moreira, Juan, Capa, Maria, Nygren, Arne & Parapar, Julio" docDate="2022" docId="B06F73F78E65529D8ACF9EC4FB5A480F" docLanguage="en" docName="ZooKeys 1132: 85-126" docOrigin="ZooKeys 1132" docPubDate="2022-11-28" docSource="http://dx.doi.org/10.3897/zookeys.1132.91244" docTitle="Terebellides Group C (sensu Nygren et al. 2018)" docType="treatment" docVersion="1" id="E57A2873FAAC552282A3E1390FF28D3E" lastPageNumber="85" masterDocId="E57A2873FAAC552282A3E1390FF28D3E" masterDocTitle="A further step towards the characterisation of Terebellides (Annelida, Trichobranchidae) diversity in the Northeast Atlantic, with the description of a new species" masterLastPageNumber="126" masterPageNumber="85" pageNumber="85" updateTime="1669726345720" updateUser="pensoft">
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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>A further step towards the characterisation of Terebellides (Annelida, Trichobranchidae) diversity in the Northeast Atlantic, with the description of a new species</mods:title>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Barroso, Maria</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-9624-3602</mods:nameIdentifier>
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<mods:affiliation>Departamento de Bioloxia, Universidade da Coruna, A Coruna, Spain</mods:affiliation>
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<mods:nameIdentifier type="email">maria.p.barroso@udc.es</mods:nameIdentifier>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Moreira, Juan</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-1374-2033</mods:nameIdentifier>
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<mods:affiliation>Departamento de Biologia (Zoologia) & Centro de Investigacion en Biodiversidad y Cambio Global (CIBC-UAM), Facultad de Ciencias, Universidad Autonoma de Madrid, Madrid, Spain</mods:affiliation>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Capa, Maria</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-5063-7961</mods:nameIdentifier>
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<mods:affiliation>Departament de Biologia, Universitat de les Illes Balears, Mallorca, Spain</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Nygren, Arne</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-5761-8803</mods:nameIdentifier>
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<mods:affiliation>Sjoefartmuseet Akvariet, Goeteborg, Sweden & Institutionen foer marina vetenskaper, Goeteborgs Universitet, Goeteborg, Sweden</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Parapar, Julio</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-7585-6995</mods:nameIdentifier>
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<mods:affiliation>Departamento de Bioloxia, Universidade da Coruna, A Coruna, Spain</mods:affiliation>
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<mods:title>ZooKeys</mods:title>
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<mods:date>2022</mods:date>
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<mods:number>2022-11-28</mods:number>
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<mods:number>1132</mods:number>
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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.1132.91244</mods:identifier>
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<treatment LSID="urn:lsid:plazi:treatment:B06F73F78E65529D8ACF9EC4FB5A480F" httpUri="http://treatment.plazi.org/id/B06F73F78E65529D8ACF9EC4FB5A480F" lastPageNumber="85" pageId="0" pageNumber="85">
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<taxonomicName LSID="B06F73F7-8E65-529D-8ACF-9EC4FB5A480F" authority="Group C (sensu Nygren et al. 2018)" authorityName="Group C (sensu Nygren et al. 2018)" class="Polychaeta" family="Trichobranchidae" genus="Terebellides" higherTaxonomySource="treatment-meta" kingdom="Animalia" lsidName="Terebellides" order="Terebellida" pageId="0" pageNumber="85" phylum="Annelida" rank="genus">Terebellides Group C (sensu Nygren et al. 2018)</taxonomicName>
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<subSubSection pageId="0" pageNumber="85" type="description">
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<paragraph pageId="0" pageNumber="85">
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">Figs 3</figureCitation>
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Line drawings of several Terebellides species (A, C, D non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186), anterior end, right lateral view B Terebellides lavesquei sp. nov. (holotype; ZMBN 116322), anterior end, left lateral view C Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498), anterior end, ventral view D Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283), anterior end, right lateral view. Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; tm - tentacular membrane." figureDoi="10.3897/zookeys.1132.91244.figure4" httpUri="https://binary.pensoft.net/fig/775020" pageId="0" pageNumber="85">, 4</figureCitation>
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<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Relationship between number of abdominal chaetigers and body length (complete specimens considered except for T. irinae)." figureDoi="10.3897/zookeys.1132.91244.figure9" httpUri="https://binary.pensoft.net/fig/775025" pageId="0" pageNumber="85">, 9</figureCitation>
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<figureCitation captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Geographic distribution of species of Terebellides in Northeast Atlantic Ocean A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 B Terebellides lavesquei sp. nov. C Terebellides atlantis Williams, 1984 D Terebellides irinae Gagaev, 2009 E Terebellides williamsae Jirkov, 1989 F Terebellides gracilis Malm, 1874. Pink star denotes the type locality of each taxon." figureDoi="10.3897/zookeys.1132.91244.figure10" httpUri="https://binary.pensoft.net/fig/775026" pageId="0" pageNumber="85">, 10</figureCitation>
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<figureCitation captionStart="Figure 11" captionStartId="F11" captionText="Figure 11. Bathymetric distribution of Terebellides species studied in this work." figureDoi="10.3897/zookeys.1132.91244.figure11" httpUri="https://binary.pensoft.net/fig/775027" pageId="0" pageNumber="85">, 11</figureCitation>
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<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Body MG staining patterns in ventral view of Terebellides species. Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016, Terebellides lavesquei sp. nov., Terebellides atlantis Williams, 1984, Terebellides irinae Gagaev, 2009, Terebellides williamsae Jirkov, 1989 and Terebellides gracilis Malm, 1874. Segments indicated in Arabic numbers." figureDoi="10.3897/zookeys.1132.91244.figure12" httpUri="https://binary.pensoft.net/fig/775028" pageId="0" pageNumber="85">, 12</figureCitation>
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<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Terebellides irinae Gagaev, 2009 (species 24; non-type specimen, ZMBN 116501), SEM micrographs. A anterior end, ventral view B TC 6 (TU 1), geniculate chaetae C row of thoracic uncini D thoracic uncini E abdominal uncini F abdominal uncinus, detail. Abbreviations: tc - thoracic chaetiger; tm - tentacular membrane; tu - thoracic unciniger." figureDoi="10.3897/zookeys.1132.91244.figure13" httpUri="https://binary.pensoft.net/fig/775029" pageId="0" pageNumber="85">, 13</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="85" type="description">
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<paragraph pageId="0" pageNumber="85">Description.</paragraph>
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<paragraph pageId="0" pageNumber="85">
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The morphological features of the examined species in Group C in this paper (clade 24) are itemised below. Some of these are also shared by Groups A, B, and D as defined in
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<bibRefCitation DOI="https://doi.org/10.1371/journal.pone.0198356" author="Nygren, A" journalOrPublisher="Molecular Phylogenetics and Evolution" pageId="0" pageNumber="85" refId="B26" refString="Nygren, A, Parapar, J, Pons, J, Meissner, K, Bakken, T, Kongsrud, JA, Oug, E, Gaeva, D, Sikorski, A, Johansen, RA, Hutchings, PA, Lavesque, N, Capa, M, 2018. A mega-cryptic species complex hidden among one of the most common annelids in the North-East Atlantic. PLoS ONE 13(6): e0198356. https://doi.org/10.1371/journal.pone.0198356" title="A mega-cryptic species complex hidden among one of the most common annelids in the North-East Atlantic. PLoS ONE 13 (6): e 0198356." url="https://doi.org/10.1371/journal.pone.0198356" year="2018">Nygren et al. (2018)</bibRefCitation>
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(see Remarks below). Clade 25 will be studied elsewhere; formal description of clade 22 will wait until more material is available.
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</paragraph>
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<paragraph pageId="0" pageNumber="85">
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<emphasis bold="true" pageId="0" pageNumber="85">
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<emphasis italics="true" pageId="0" pageNumber="85">Body appearance</emphasis>
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.
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</emphasis>
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Incomplete individuals ranging from 10.0-17.0 mm in length. Body tapering posteriorly with segments increasingly shorter and crowded towards pygidium. Prostomium compact; large tentacular membrane surrounding mouth (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">3D</figureCitation>
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), with typical buccal tentacles with expanded tips (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">3D</figureCitation>
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). SG 1 as an expanded structure below tentacular membrane in a lower lip (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">3D</figureCitation>
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).
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</paragraph>
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<paragraph pageId="0" pageNumber="85">
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<emphasis bold="true" pageId="0" pageNumber="85">
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<emphasis italics="true" pageId="0" pageNumber="85">Branchiae</emphasis>
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.
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</emphasis>
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Branchiae arising as single structure from SG 3, with a single stalked mid-dorsal stem, lobes not fused (Fig.
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Line drawings of several Terebellides species (A, C, D non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186), anterior end, right lateral view B Terebellides lavesquei sp. nov. (holotype; ZMBN 116322), anterior end, left lateral view C Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498), anterior end, ventral view D Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283), anterior end, right lateral view. Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; tm - tentacular membrane." figureDoi="10.3897/zookeys.1132.91244.figure4" httpUri="https://binary.pensoft.net/fig/775020" pageId="0" pageNumber="85">4C</figureCitation>
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). Dorsal lobes ending posteriorly in short terminal papilla (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">3D</figureCitation>
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) and ventral lobes ones ending in long filaments. Anterior projection of dorsal lobes (fifth lobe) present. Posterior end of dorsal lobes reaching TC 4. Ciliary rows of cilia and ciliary tufts in inner face of branchial lamellae not observed. Ciliary papillae absent in branchial lamellae margin.
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</paragraph>
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<paragraph pageId="0" pageNumber="85">
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<emphasis bold="true" pageId="0" pageNumber="85">
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<emphasis italics="true" pageId="0" pageNumber="85">Thorax</emphasis>
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.
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</emphasis>
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Eighteen pairs of notopodia (SG 3-20) (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">3D</figureCitation>
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), those of TC 1 approximately as long as subsequent ones (Fig.
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Line drawings of several Terebellides species (A, C, D non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186), anterior end, right lateral view B Terebellides lavesquei sp. nov. (holotype; ZMBN 116322), anterior end, left lateral view C Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498), anterior end, ventral view D Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283), anterior end, right lateral view. Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; tm - tentacular membrane." figureDoi="10.3897/zookeys.1132.91244.figure4" httpUri="https://binary.pensoft.net/fig/775020" pageId="0" pageNumber="85">4C</figureCitation>
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). Lateral lappets and dorsal projections of notopodia in anterior thoracic chaetigers with different degree of development depending on size and preservation conditions, but both more conspicuous on TC 1-5. All notochaetae as simple capillaries. Size of notochaetae of TC 1 similar to subsequent ones. Neuropodia as sessile pinnules from TC 6 to body end, with uncini in single rows, from TC 7 throughout. Neuropodia on TC 6, provided with several sharply bent, acute-tipped, geniculate chaetae (Fig.
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<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Terebellides irinae Gagaev, 2009 (species 24; non-type specimen, ZMBN 116501), SEM micrographs. A anterior end, ventral view B TC 6 (TU 1), geniculate chaetae C row of thoracic uncini D thoracic uncini E abdominal uncini F abdominal uncinus, detail. Abbreviations: tc - thoracic chaetiger; tm - tentacular membrane; tu - thoracic unciniger." figureDoi="10.3897/zookeys.1132.91244.figure13" httpUri="https://binary.pensoft.net/fig/775029" pageId="0" pageNumber="85">13B</figureCitation>
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) with minute teeth forming a capitium only visible with SEM (Fig.
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<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Terebellides irinae Gagaev, 2009 (species 24; non-type specimen, ZMBN 116501), SEM micrographs. A anterior end, ventral view B TC 6 (TU 1), geniculate chaetae C row of thoracic uncini D thoracic uncini E abdominal uncini F abdominal uncinus, detail. Abbreviations: tc - thoracic chaetiger; tm - tentacular membrane; tu - thoracic unciniger." figureDoi="10.3897/zookeys.1132.91244.figure13" httpUri="https://binary.pensoft.net/fig/775029" pageId="0" pageNumber="85">13B</figureCitation>
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). From TC 7, neuropodia with one row of uncini per torus (Fig.
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<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Terebellides irinae Gagaev, 2009 (species 24; non-type specimen, ZMBN 116501), SEM micrographs. A anterior end, ventral view B TC 6 (TU 1), geniculate chaetae C row of thoracic uncini D thoracic uncini E abdominal uncini F abdominal uncinus, detail. Abbreviations: tc - thoracic chaetiger; tm - tentacular membrane; tu - thoracic unciniger." figureDoi="10.3897/zookeys.1132.91244.figure13" httpUri="https://binary.pensoft.net/fig/775029" pageId="0" pageNumber="85">13C</figureCitation>
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), with long shafted denticulate hooks, with large main fang (rostrum) longer than upper crest of teeth (capitium), rostrum/capitium length ratio of ~ 2:1, capitium composed by several teeth above main fang of decreasing length (Fig.
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<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Terebellides irinae Gagaev, 2009 (species 24; non-type specimen, ZMBN 116501), SEM micrographs. A anterior end, ventral view B TC 6 (TU 1), geniculate chaetae C row of thoracic uncini D thoracic uncini E abdominal uncini F abdominal uncinus, detail. Abbreviations: tc - thoracic chaetiger; tm - tentacular membrane; tu - thoracic unciniger." figureDoi="10.3897/zookeys.1132.91244.figure13" httpUri="https://binary.pensoft.net/fig/775029" pageId="0" pageNumber="85">13D</figureCitation>
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).
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</paragraph>
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<caption doi="10.3897/zookeys.1132.91244.figure13" httpUri="https://binary.pensoft.net/fig/775029" pageId="0" pageNumber="85" start="Figure 13" startId="F13">
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<paragraph pageId="0" pageNumber="85">
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<emphasis bold="true" pageId="0" pageNumber="85">Figure 13.</emphasis>
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<taxonomicName authorityName="Gagaev" authorityYear="2009" class="Polychaeta" family="Trichobranchidae" genus="Terebellides" kingdom="Animalia" lsidName="Terebellides irinae" order="Canalipalpata" pageId="0" pageNumber="85" phylum="Annelida" rank="species" species="irinae">
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<emphasis italics="true" pageId="0" pageNumber="85">Terebellides irinae</emphasis>
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</taxonomicName>
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Gagaev, 2009 (species 24; non-type specimen, ZMBN116501), SEM micrographs.
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<emphasis bold="true" pageId="0" pageNumber="85">A</emphasis>
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anterior end, ventral view
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<emphasis bold="true" pageId="0" pageNumber="85">B</emphasis>
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TC 6 (TU1), geniculate chaetae
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<emphasis bold="true" pageId="0" pageNumber="85">C</emphasis>
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row of thoracic uncini
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<emphasis bold="true" pageId="0" pageNumber="85">D</emphasis>
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thoracic uncini
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<emphasis bold="true" pageId="0" pageNumber="85">E</emphasis>
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abdominal uncini
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<emphasis bold="true" pageId="0" pageNumber="85">F</emphasis>
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abdominal uncinus, detail. Abbreviations: tc - thoracic chaetiger; tm - tentacular membrane; tu - thoracic unciniger.
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</paragraph>
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</caption>
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<paragraph pageId="0" pageNumber="85">
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<emphasis bold="true" pageId="0" pageNumber="85">
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<emphasis italics="true" pageId="0" pageNumber="85">Abdomen and pygidium</emphasis>
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.
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</emphasis>
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Approximately half as long as thorax and progressively thinner (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">3D</figureCitation>
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). Neuropodia ranging from 18-20 chaetigers and forming erect pinnules with several uncini per torus, number depending on specimen size. Uncini provided with several teeth above rostrum surmounted by a capitium composed of several teeth of decreasing length (Fig.
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<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Terebellides irinae Gagaev, 2009 (species 24; non-type specimen, ZMBN 116501), SEM micrographs. A anterior end, ventral view B TC 6 (TU 1), geniculate chaetae C row of thoracic uncini D thoracic uncini E abdominal uncini F abdominal uncinus, detail. Abbreviations: tc - thoracic chaetiger; tm - tentacular membrane; tu - thoracic unciniger." figureDoi="10.3897/zookeys.1132.91244.figure13" httpUri="https://binary.pensoft.net/fig/775029" pageId="0" pageNumber="85">13E, F</figureCitation>
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). Pygidium blunt, as funnel-like depression.
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</paragraph>
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<paragraph pageId="0" pageNumber="85">
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<emphasis bold="true" pageId="0" pageNumber="85">
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<emphasis italics="true" pageId="0" pageNumber="85">Colour pattern</emphasis>
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.
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</emphasis>
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Colour in preserved specimens whitish (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. STM photographs of several Terebellides species (A, C-F non-type specimens) A Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016 (species 1; ZMBN 116186) B Terebellides lavesquei sp. nov. (species 5; holotype, ZMBN 116322) C Terebellides atlantis Williams, 1984 (species 16; ZMBN 116472) D Terebellides irinae Gagaev, 2009 (species 24; ZMBN 116498) E Terebellides williamsae Jirkov, 1989 (species 2; ZMBN 116269) F Terebellides gracilis Malm, 1874 (species 3; ZMBN 116283). Abbreviations: bdl - branchial dorsal lobe; bf - branchial filament; bvl - branchial ventral lobe; ooc - oocytes; wTC - white thoracic chaetiger." figureDoi="10.3897/zookeys.1132.91244.figure3" httpUri="https://binary.pensoft.net/fig/775019" pageId="0" pageNumber="85">3D</figureCitation>
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). MG staining pattern characterised by compact green colourant in SG 1-4, then turning into striped pattern in SG 5-14 and fading in following segments (Fig.
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<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Body MG staining patterns in ventral view of Terebellides species. Terebellides shetlandica Parapar, Moreira & O'Reilly, 2016, Terebellides lavesquei sp. nov., Terebellides atlantis Williams, 1984, Terebellides irinae Gagaev, 2009, Terebellides williamsae Jirkov, 1989 and Terebellides gracilis Malm, 1874. Segments indicated in Arabic numbers." figureDoi="10.3897/zookeys.1132.91244.figure12" httpUri="https://binary.pensoft.net/fig/775028" pageId="0" pageNumber="85">12</figureCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="85" type="remarks">
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<paragraph pageId="0" pageNumber="85">Remarks.</paragraph>
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<paragraph pageId="0" pageNumber="85">
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Among the above-mentioned characters, branchial features might serve to distinguish most of Group C species from those of Groups A, B and D. Those include branchial lobes size, presence of filaments in ventral ones and lobes which are not fused. Other taxa such as
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<taxonomicName authorityName="Schuller & Hutchings" authorityYear="2013" class="Polychaeta" family="Trichobranchidae" genus="Terebellides" kingdom="Animalia" lsidName="Terebellides mira" order="Canalipalpata" pageId="0" pageNumber="85" phylum="Annelida" rank="species" species="mira">
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<emphasis italics="true" pageId="0" pageNumber="85">Terebellides mira</emphasis>
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</taxonomicName>
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<normalizedToken originalValue="Schüller">Schueller</normalizedToken>
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& Hutchings, 2013 and
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<taxonomicName class="Polychaeta" kingdom="Animalia" lsidName="T. rigel" pageId="0" pageNumber="85" phylum="Annelida" rank="species" species="rigel">
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<emphasis italics="true" pageId="0" pageNumber="85">T. rigel</emphasis>
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</taxonomicName>
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<normalizedToken originalValue="Schüller">Schueller</normalizedToken>
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& Hutchings, 2013 also bear branchiae with similar shape (
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<bibRefCitation DOI="https://doi.org/10.1007/s12526-015-0353-5" author="Parapar, J" journalOrPublisher="Marine Biodiversity" pageId="0" pageNumber="85" pagination="211 - 225" refId="B30" refString="Parapar, J, Moreira, J, O'Reilly, M, 2016a. A new species of Terebellides (Polychaeta: Trichobranchidae) from Scottish waters with an insight into branchial morphology. Marine Biodiversity 46 (1): 211 - 225, DOI: https://doi.org/10.1007/s12526-015-0353-5" title="A new species of Terebellides (Polychaeta: Trichobranchidae) from Scottish waters with an insight into branchial morphology." url="https://doi.org/10.1007/s12526-015-0353-5" volume="46" year="2016 a">Parapar et al. 2016a</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |