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<document id="B76AAD44F8B8194AF8740F08A9F33B97" ID-CLB-Dataset="29502" ID-DOI="10.11646/zootaxa.4484.1.1" ID-GBIF-Dataset="74b777c9-eae0-4770-8c86-dcbb10fb06b3" ID-ISSN="1175-5326" ID-Zenodo-Dep="1437848" ID-ZooBank="D66524CF-9C6D-4DF4-8CA2-B2C9708CF5FD" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1538125412450" checkinUser="plazi" docAuthor="Grischenko, Andrei V., Gordon, Dennis P. &amp; Melnik, Viacheslav P." docDate="2018" docId="521587E45676554E09EEFAFF8958FCB0" docLanguage="en" docName="zootaxa.4484.1.1.pdf" docOrigin="Zootaxa 4484 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Haywardozoon pacificum Grischenko &amp; Gordon &amp; Melnik 2018, n. sp." docType="treatment" docVersion="8" lastPageNumber="74" masterDocId="AE2CFF9C563255070979FF888A4AFF87" masterDocTitle="Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining" masterLastPageNumber="91" masterPageNumber="1" pageNumber="69" updateTime="1698557051871" updateUser="ExternalLinkService">
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<mods:title id="4F74CC4823D1FF352378DC3A3E8B8A78">Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining</mods:title>
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<mods:namePart id="5040D89D6E285D45B7317B579A90F251">Grischenko, Andrei V.</mods:namePart>
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<mods:namePart id="1F370BBE238043789B8018687E1A278E">Gordon, Dennis P.</mods:namePart>
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<mods:namePart id="C6542DD8356EF82CDB2FE1EC1D58DCCC">Melnik, Viacheslav P.</mods:namePart>
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<mods:date id="CA8FCEEB6C3FCDA1031861FD2E1AA9CA">2018</mods:date>
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<mods:number id="024E4EEDE594F51F668F9CC49C7FAD31">2018-09-25</mods:number>
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<treatment id="521587E45676554E09EEFAFF8958FCB0" ID-DOI="http://doi.org/10.5281/zenodo.5989837" ID-GBIF-Taxon="148403707" ID-Zenodo-Dep="5989837" LSID="urn:lsid:plazi:treatment:521587E45676554E09EEFAFF8958FCB0" httpUri="http://treatment.plazi.org/id/521587E45676554E09EEFAFF8958FCB0" lastPageId="73" lastPageNumber="74" pageId="68" pageNumber="69">
<subSubSection id="92A665795676554309EEFAFF8B6DFA34" pageId="68" pageNumber="69" type="nomenclature">
<paragraph id="DA0336F25676554309EEFAFF885DFA15" blockId="68.[151,535,1399,1459]" box="[151,535,1399,1426]" pageId="68" pageNumber="69">
<heading id="814B819E5676554309EEFAFF885DFA15" bold="true" box="[151,535,1399,1426]" fontSize="11" level="1" pageId="68" pageNumber="69" reason="1">
<emphasis id="E8C8EAE05676554309EEFAFF885DFA15" bold="true" box="[151,535,1399,1426]" pageId="68" pageNumber="69">
<taxonomicName id="1DBC4D715676554309EEFAFF8B87FA16" ID-CoL="3e1cfe1c-67d8-4d7d-a180-d4d86e244898" authority="Grischenko &amp; Gordon &amp; Melnik, 2018" authorityName="Grischenko &amp; Gordon &amp; Melnik" authorityYear="2018" box="[151,461,1399,1425]" class="Gymnolaemata" family="Haywardozoidae" genus="Haywardozoon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="68" pageNumber="69" phylum="Bryozoa" rank="species" species="pacificum" status="sp. nov.">
<emphasis id="E8C8EAE05676554309EEFAFF8B87FA16" bold="true" box="[151,461,1399,1425]" italics="true" pageId="68" pageNumber="69">Haywardozoon pacificum</emphasis>
</taxonomicName>
<taxonomicNameLabel id="F3FB579B5676554308ADFAF0885DFA15" box="[468,535,1400,1426]" pageId="68" pageNumber="69" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="DA0336F25676554309EEFA128B6DFA34" blockId="68.[151,535,1399,1459]" box="[151,295,1434,1459]" pageId="68" pageNumber="69">
(
<figureCitation id="42872A775676554309E6FA128ABFFA34" box="[159,245,1434,1459]" captionStart="FIGURE 47" captionStartId="71.[151,250,1878,1900]" captionTargetBox="[162,1427,193,1859]" captionTargetId="figure@71.[162,1427,193,1859]" captionTargetPageId="71" captionText="FIGURE 47. Haywardozoon pacificum n. sp. Specimens stained in Rose Bengal. A, specimen GLD411, Stn 214, zooids on a serpulid tube; BG, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube; HJ, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm." httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="68" pageNumber="69">Figs 47</figureCitation>
,
<figureCitation id="42872A77567655430878FA138B54FA34" box="[257,286,1435,1459]" captionStart="FIGURE 48" captionStartId="72.[151,250,1911,1933]" captionTargetBox="[151,1436,210,1859]" captionTargetId="figure@72.[151,1436,210,1859]" captionTargetPageId="72" captionText="FIGURE 48. Haywardozoon pacificum n. sp. Holotype, ZIRAS 1/50726. AF, autozooids disposed on serpulid tube, all slightly collapsed through drying; G, H, orificial region showing operculum-like flap; I, autozooid, with dwarf ancestrular at lower right; J, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm." httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="68" pageNumber="69">48</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="92A665795676554309EEFA6A88BBF9E0" pageId="68" pageNumber="69" type="materials_examined">
<paragraph id="DA0336F25676554309EEFA6A88BBF9E0" blockId="68.[151,1436,1506,2035]" pageId="68" pageNumber="69">
<emphasis id="E8C8EAE05676554309EEFA6A8BCFFA7C" bold="true" box="[151,389,1506,1531]" pageId="68" pageNumber="69">Material examined.</emphasis>
<emphasis id="E8C8EAE05676554308E9FA6A8BBCFA7C" box="[400,502,1506,1531]" italics="true" pageId="68" pageNumber="69">Holotype</emphasis>
: ZIRAS 1/50726, colony encrusting tube of serpulid polychaete detached from nodule, YMG R.V.
<emphasis id="E8C8EAE0567655430803F98E8803F998" box="[378,585,1542,1567]" italics="true" pageId="68" pageNumber="69">Yuzhmorgeologiya</emphasis>
cruise YMG404, Stn
<date id="AE021032567655430A21F98F89B6F998" box="[856,1020,1542,1567]" pageId="68" pageNumber="69" value="1939-08-16">39, 16 August</date>
2005, 13.61415° N, 130.82158° W,
<quantity id="1D449B175676554309EEF9A28AB9F9C5" box="[151,243,1578,1603]" metricMagnitude="3" metricUnit="m" metricValue="5.017" pageId="68" pageNumber="69" unit="m" value="5017.0">5017 m</quantity>
.
<emphasis id="E8C8EAE056765543087BF9A28BA9F9C4" box="[258,483,1578,1603]" italics="true" pageId="68" pageNumber="69">Additional material</emphasis>
: YMG407, Stns 134, 143; GLD411, Stns 214, 220; GLD412, Stns 245, 267; YMG414, Stn 322. Total specimens examined eight.
</paragraph>
</subSubSection>
<subSubSection id="92A665795676554309BEF9FA8E7CF90C" box="[199,1078,1650,1675]" pageId="68" pageNumber="69" type="etymology">
<paragraph id="DA0336F25676554309BEF9FA8E7CF90C" blockId="68.[151,1436,1506,2035]" box="[199,1078,1650,1675]" pageId="68" pageNumber="69">
<emphasis id="E8C8EAE05676554309BEF9FA8B04F90C" bold="true" box="[199,334,1650,1675]" pageId="68" pageNumber="69">Etymology.</emphasis>
Alluding to the first description of the genus in the Pacific Ocean.
</paragraph>
</subSubSection>
<subSubSection id="92A665795676554E09BEF91E8971FE72" lastPageId="73" lastPageNumber="74" pageId="68" pageNumber="69" type="description">
<paragraph id="DA0336F25676554309BEF91E8B2FF8E4" blockId="68.[151,1436,1506,2035]" pageId="68" pageNumber="69">
<emphasis id="E8C8EAE05676554309BEF91E8B13F928" bold="true" box="[199,345,1686,1711]" pageId="68" pageNumber="69">Description.</emphasis>
Colony encrusting, diffuse, comprising up to
<emphasis id="E8C8EAE0567655430A1EF91F8939F929" box="[871,883,1687,1710]" italics="true" pageId="68" pageNumber="69">c</emphasis>
. 12 large zooids, partly uniserially arranged and disjunct (
<figureCitation id="42872A7756765543087CF9328B28F954" box="[261,354,1722,1747]" captionStart="FIGURE 47" captionStartId="71.[151,250,1878,1900]" captionTargetBox="[162,1427,193,1859]" captionTargetId="figure@71.[162,1427,193,1859]" captionTargetPageId="71" captionText="FIGURE 47. Haywardozoon pacificum n. sp. Specimens stained in Rose Bengal. A, specimen GLD411, Stn 214, zooids on a serpulid tube; BG, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube; HJ, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm." httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="68" pageNumber="69">Figs 47</figureCitation>
,
<figureCitation id="42872A7756765543080DF9338BD9F954" box="[372,403,1723,1747]" captionStart="FIGURE 48" captionStartId="72.[151,250,1911,1933]" captionTargetBox="[151,1436,210,1859]" captionTargetId="figure@72.[151,1436,210,1859]" captionTargetPageId="72" captionText="FIGURE 48. Haywardozoon pacificum n. sp. Holotype, ZIRAS 1/50726. AF, autozooids disposed on serpulid tube, all slightly collapsed through drying; G, H, orificial region showing operculum-like flap; I, autozooid, with dwarf ancestrular at lower right; J, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm." httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="68" pageNumber="69">48</figureCitation>
), adjacent zooids connected distally and laterally by very small contact points; highly transparent and apparently colorless in life. Zooids generally mostly elongated, their lateral outlines weakly convex to subparallel or even slightly diverging; bilaterally symmetrical or one side extending outwards as a triangular skirt. Daughter zooids budded distolaterally. Membranous frontal wall gently rising to highest point of zooid at orifice (
<figureCitation id="42872A77567655430996F8C28B12F8E4" box="[239,344,1866,1891]" captionStart="FIGURE 47" captionStartId="71.[151,250,1878,1900]" captionTargetBox="[162,1427,193,1859]" captionTargetId="figure@71.[162,1427,193,1859]" captionTargetPageId="71" captionText="FIGURE 47. Haywardozoon pacificum n. sp. Specimens stained in Rose Bengal. A, specimen GLD411, Stn 214, zooids on a serpulid tube; BG, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube; HJ, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm." httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="68" pageNumber="69">Fig. 47G</figureCitation>
).
</paragraph>
<paragraph id="DA0336F25676554309BEF8E6897EF874" blockId="68.[151,1436,1506,2035]" pageId="68" pageNumber="69">
Orifice wider than long (
<figureCitation id="42872A77567655430B75F8E688D7F801" box="[524,669,1902,1927]" captionStart="FIGURE 47" captionStartId="71.[151,250,1878,1900]" captionTargetBox="[162,1427,193,1859]" captionTargetId="figure@71.[162,1427,193,1859]" captionTargetPageId="71" captionText="FIGURE 47. Haywardozoon pacificum n. sp. Specimens stained in Rose Bengal. A, specimen GLD411, Stn 214, zooids on a serpulid tube; BG, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube; HJ, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm." httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="68" pageNumber="69">
Figs
<date id="AE021032567655430B28F8E78833F800" box="[593,633,1903,1927]" pageId="68" pageNumber="69" value="1947-01">47I</date>
, J
</figureCitation>
,
<figureCitation id="42872A77567655430BCFF8E788A3F800" box="[694,745,1903,1927]" captionStart="FIGURE 48" captionStartId="72.[151,250,1911,1933]" captionTargetBox="[151,1436,210,1859]" captionTargetId="figure@72.[151,1436,210,1859]" captionTargetPageId="72" captionText="FIGURE 48. Haywardozoon pacificum n. sp. Holotype, ZIRAS 1/50726. AF, autozooids disposed on serpulid tube, all slightly collapsed through drying; G, H, orificial region showing operculum-like flap; I, autozooid, with dwarf ancestrular at lower right; J, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm." httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="68" pageNumber="69">48G</figureCitation>
), having slightly thickened cuticularized rim with two components—proximal rim more or less transversely C-shaped, concave on inner side; distal rim more or less straight but produced proximally as D-shaped flap that superficially resembles operculum and fits into concavity of proximal rim; edge of flap slightly thickened (
<figureCitation id="42872A77567655430BE5F8528962F874" box="[668,808,2010,2035]" captionStart="FIGURE 48" captionStartId="72.[151,250,1911,1933]" captionTargetBox="[151,1436,210,1859]" captionTargetId="figure@72.[151,1436,210,1859]" captionTargetPageId="72" captionText="FIGURE 48. Haywardozoon pacificum n. sp. Holotype, ZIRAS 1/50726. AF, autozooids disposed on serpulid tube, all slightly collapsed through drying; G, H, orificial region showing operculum-like flap; I, autozooid, with dwarf ancestrular at lower right; J, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm." httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="68" pageNumber="69">Figs 48G, H</figureCitation>
).
</paragraph>
<caption id="8EC3667A5677554209EEF81188AAF849" httpUri="https://zenodo.org/record/1437939/files/figure.png" pageId="69" pageNumber="70" startId="69.[151,250,1945,1967]" targetBox="[151,1436,193,1924]" targetPageId="69">
<paragraph id="DA0336F25677554209EEF81188AAF849" blockId="69.[151,1436,1945,1998]" pageId="69" pageNumber="70">
<emphasis id="E8C8EAE05677554209EEF8118B55F828" bold="true" box="[151,287,1945,1967]" pageId="69" pageNumber="70">FIGURE 45.</emphasis>
?Anyutidae sp.
<taxonomicName id="1DBC4D715677554208BAF8128805F828" authorityName="Grischenko &amp; Gordon &amp; Melnik" authorityYear="2018" box="[451,591,1945,1967]" class="Monothalamea" family="Sedis" higherTaxonomySource="CoL" kingdom="Chromista" order="Astrorhizida" pageId="69" pageNumber="15" phylum="Foraminifera" rank="family">
<emphasis id="E8C8EAE05677554208BAF8128805F828" box="[451,591,1945,1967]" italics="true" pageId="69" pageNumber="70">incertae sedis</emphasis>
</taxonomicName>
.
<emphasis id="E8C8EAE0567755420B25F81188C6F828" bold="true" box="[604,652,1945,1967]" pageId="69" pageNumber="70">AD</emphasis>
, rotational views of colony ZIRAS 1/50725; note the highly alveolate colony surface and fascicles of variable size. Scale bars: 500 µm.
</paragraph>
</caption>
<caption id="8EC3667A5674554109EEF8DC8EF2F863" httpUri="https://zenodo.org/record/1437941/files/figure.png" pageId="70" pageNumber="71" startId="70.[151,250,1876,1898]" targetBox="[176,1420,193,1865]" targetPageId="70">
<paragraph id="DA0336F25674554109EEF8DC8EF2F863" blockId="70.[151,1436,1876,2020]" pageId="70" pageNumber="71">
<emphasis id="E8C8EAE05674554109EEF8DC8B6AF8ED" bold="true" box="[151,288,1876,1898]" pageId="70" pageNumber="71">FIGURE 46.</emphasis>
?Anyutidae sp.
<taxonomicName id="1DBC4D715674554108BFF8DD8819F8ED" authorityName="Grischenko &amp; Gordon &amp; Melnik" authorityYear="2018" box="[454,595,1876,1898]" class="Monothalamea" family="Sedis" higherTaxonomySource="CoL" kingdom="Chromista" order="Astrorhizida" pageId="70" pageNumber="15" phylum="Foraminifera" rank="family">
<emphasis id="E8C8EAE05674554108BFF8DD8819F8ED" box="[454,595,1876,1898]" italics="true" pageId="70" pageNumber="71">incertae sedis</emphasis>
</taxonomicName>
. AG, IK, colony ZIRAS 1/50725; H, specimen GLD412, Stn 257.
<emphasis id="E8C8EAE0567455410C5BF8DC8F7EF8ED" bold="true" box="[1314,1332,1876,1898]" pageId="70" pageNumber="71">A</emphasis>
,
<emphasis id="E8C8EAE0567455410C38F8DC8F18F8ED" bold="true" box="[1345,1362,1876,1898]" pageId="70" pageNumber="71">B</emphasis>
, apical and oblique lateral views of capitulum (partly damaged);
<emphasis id="E8C8EAE0567455410B9BF8FA88BEF80F" bold="true" box="[738,756,1906,1928]" pageId="70" pageNumber="71">C</emphasis>
, alveoli of capitulum surface;
<emphasis id="E8C8EAE0567455410D55F8FA8E74F80F" bold="true" box="[1068,1086,1906,1928]" pageId="70" pageNumber="71">D</emphasis>
, skeletal microstructure;
<emphasis id="E8C8EAE0567455410C38F8FA8F18F80F" bold="true" box="[1345,1362,1906,1928]" pageId="70" pageNumber="71">E</emphasis>
, crosssection through fascicle of autozooids and alveolar cavities;
<emphasis id="E8C8EAE0567455410A5AF819897AF820" bold="true" box="[803,816,1937,1959]" pageId="70" pageNumber="71">F</emphasis>
,
<emphasis id="E8C8EAE0567455410A3BF8198919F820" bold="true" box="[834,851,1937,1959]" pageId="70" pageNumber="71">G</emphasis>
,
<emphasis id="E8C8EAE0567455410A1DF8198924F820" bold="true" box="[868,878,1937,1959]" pageId="70" pageNumber="71">I</emphasis>
,
<emphasis id="E8C8EAE0567455410AF9F81989C7F820" bold="true" box="[896,909,1937,1959]" pageId="70" pageNumber="71">J</emphasis>
, close-ups of fascicles of varied sizes and zooid dispositions;
<emphasis id="E8C8EAE0567455410864F8388B7BF841" bold="true" box="[285,305,1968,1990]" pageId="70" pageNumber="71">H</emphasis>
, small fascicle in which one peristome has a calcified terminal diaphragm;
<emphasis id="E8C8EAE0567455410D54F8388E0BF841" bold="true" box="[1069,1089,1968,1990]" pageId="70" pageNumber="71">K</emphasis>
, interior wall of broken peristome showing crystallites. Scale bars: A, 500 µm; B, F, 250 µm; C, E, G, 200 µm; D, K, 50 µm; HJ, 100 µm.
</paragraph>
</caption>
<caption id="8EC3667A5675554009EEF8DE8E4BF861" httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="71" pageNumber="72" startId="71.[151,250,1878,1900]" targetBox="[162,1427,193,1859]" targetPageId="71">
<paragraph id="DA0336F25675554009EEF8DE8E4BF861" blockId="71.[151,1436,1878,2022]" pageId="71" pageNumber="72">
<emphasis id="E8C8EAE05675554009EEF8DE8B55F8EB" bold="true" box="[151,287,1878,1900]" pageId="71" pageNumber="72">FIGURE 47.</emphasis>
<taxonomicName id="1DBC4D7156755540085CF8DE8863F8EB" authority="Grischenko &amp; Gordon &amp; Melnik, 2018" authorityName="Grischenko &amp; Gordon &amp; Melnik" authorityYear="2018" box="[293,553,1878,1900]" class="Gymnolaemata" family="Haywardozoidae" genus="Haywardozoon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="71" pageNumber="72" phylum="Bryozoa" rank="species" species="pacificum" status="sp. nov.">
<emphasis id="E8C8EAE056755540085CF8DE8863F8EB" box="[293,553,1878,1900]" italics="true" pageId="71" pageNumber="72">Haywardozoon pacificum</emphasis>
</taxonomicName>
<emphasis id="E8C8EAE0567555400B56F8DE8823F8EB" bold="true" box="[559,617,1878,1900]" pageId="71" pageNumber="72">
<taxonomicNameLabel id="F3FB579B567555400B56F8DE8823F8EB" box="[559,617,1878,1900]" pageId="71" pageNumber="72" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
Specimens stained in Rose Bengal.
<emphasis id="E8C8EAE0567555400AA1F8DE89A0F8EB" bold="true" box="[984,1002,1878,1900]" pageId="71" pageNumber="72">A</emphasis>
, specimen GLD411, Stn 214, zooids on a serpulid tube;
<emphasis id="E8C8EAE056755540085EF8FC8B1FF80D" bold="true" box="[295,341,1908,1930]" pageId="71" pageNumber="72">BG</emphasis>
, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube;
<emphasis id="E8C8EAE0567555400D4FF8FC8E29F80D" bold="true" box="[1078,1123,1908,1930]" pageId="71" pageNumber="72">HJ</emphasis>
, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm.
</paragraph>
</caption>
<caption id="8EC3667A567A554F09EEF8FF8E86F84D" httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="72" pageNumber="73" startId="72.[151,250,1911,1933]" targetBox="[151,1436,210,1859]" targetPageId="72">
<paragraph id="DA0336F2567A554F09EEF8FF8E86F84D" blockId="72.[151,1436,1911,2028]" pageId="72" pageNumber="73">
<emphasis id="E8C8EAE0567A554F09EEF8FF8B69F80A" bold="true" box="[151,291,1911,1933]" pageId="72" pageNumber="73">FIGURE 48.</emphasis>
<taxonomicName id="1DBC4D71567A554F0857F8FF887CF80A" authority="Grischenko &amp; Gordon &amp; Melnik, 2018" authorityName="Grischenko &amp; Gordon &amp; Melnik" authorityYear="2018" box="[302,566,1911,1933]" class="Gymnolaemata" family="Haywardozoidae" genus="Haywardozoon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="72" pageNumber="73" phylum="Bryozoa" rank="species" species="pacificum" status="sp. nov.">
<emphasis id="E8C8EAE0567A554F0857F8FF887CF80A" box="[302,566,1911,1933]" italics="true" pageId="72" pageNumber="73">Haywardozoon pacificum</emphasis>
</taxonomicName>
<emphasis id="E8C8EAE0567A554F0B39F8FF8834F80A" bold="true" box="[576,638,1911,1933]" pageId="72" pageNumber="73">
<taxonomicNameLabel id="F3FB579B567A554F0B39F8FF8834F80A" box="[576,638,1911,1933]" pageId="72" pageNumber="73" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
Holotype, ZIRAS 1/50726.
<emphasis id="E8C8EAE0567A554F0AD7F8FF8990F80A" bold="true" box="[942,986,1911,1933]" pageId="72" pageNumber="73">AF</emphasis>
, autozooids disposed on serpulid tube, all slightly collapsed through drying;
<emphasis id="E8C8EAE0567A554F0883F81D8841F82C" bold="true" box="[506,523,1941,1963]" pageId="72" pageNumber="73">G</emphasis>
,
<emphasis id="E8C8EAE0567A554F0B61F81D8866F82C" bold="true" box="[536,556,1941,1963]" pageId="72" pageNumber="73">H</emphasis>
, orificial region showing operculum-like flap;
<emphasis id="E8C8EAE0567A554F0D68F81D8E51F82C" bold="true" box="[1041,1051,1941,1963]" pageId="72" pageNumber="73">I</emphasis>
, autozooid, with dwarf ancestrular at lower right;
<emphasis id="E8C8EAE0567A554F086DF83C8B6BF84D" bold="true" box="[276,289,1972,1994]" pageId="72" pageNumber="73">J</emphasis>
, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm.
</paragraph>
</caption>
<paragraph id="DA0336F2567A554E09BEF85B8BE5FE9B" blockId="72.[151,1436,1911,2028]" lastBlockId="73.[151,1437,151,824]" lastPageId="73" lastPageNumber="74" pageId="72" pageNumber="73">
Vestibule more or less parallel-sided, a little longer than broad, 2833% polypide length, with strongly developed parieto-diaphragmatic musculature at proximolateral corners (
<figureCitation id="42872A77567B554E0AA1FF1F8E1BFF37" box="[984,1105,151,176]" captionStart="FIGURE 47" captionStartId="71.[151,250,1878,1900]" captionTargetBox="[162,1427,193,1859]" captionTargetId="figure@71.[162,1427,193,1859]" captionTargetPageId="71" captionText="FIGURE 47. Haywardozoon pacificum n. sp. Specimens stained in Rose Bengal. A, specimen GLD411, Stn 214, zooids on a serpulid tube; BG, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube; HJ, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm." httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="73" pageNumber="74">
Fig.
<date id="AE021032567B554E0D77FF108E7DFF37" box="[1038,1079,152,176]" pageId="73" pageNumber="74" value="1947-01">47I</date>
, J
</figureCitation>
). Vestibule
<quantity id="1D449B17567B554E0DA2FF108FD7FF28" box="[1243,1437,152,176]" metricMagnitude="-4" metricUnit="m" metricValue="1.1" metricValueMax="1.23" metricValueMin="0.97" pageId="73" pageNumber="74" unit="mm" value="0.11" valueMax="0.123" valueMin="0.097">0.0970.123 mm</quantity>
long; retracted tentacle crown
<quantity id="1D449B17567B554E0896FF3488E7FF53" box="[495,685,188,213]" metricMagnitude="-4" metricUnit="m" metricValue="2.88" metricValueMax="3.11" metricValueMin="2.65" pageId="73" pageNumber="74" unit="mm" value="0.288" valueMax="0.311" valueMin="0.265">0.2650.311 mm</quantity>
long, tentacle number not determined. No stomach gizzard. Small brown bodies or fragments of brown bodies retained in cystid (
<figureCitation id="42872A77567B554E0A00FF5789BFFF7F" box="[889,1013,223,248]" captionStart="FIGURE 47" captionStartId="71.[151,250,1878,1900]" captionTargetBox="[162,1427,193,1859]" captionTargetId="figure@71.[162,1427,193,1859]" captionTargetPageId="71" captionText="FIGURE 47. Haywardozoon pacificum n. sp. Specimens stained in Rose Bengal. A, specimen GLD411, Stn 214, zooids on a serpulid tube; BG, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube; HJ, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm." httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="73" pageNumber="74">
Fig.
<date id="AE021032567B554E0AC8FF688993FF7F" box="[945,985,224,248]" pageId="73" pageNumber="74" value="1947-01">47I</date>
, J
</figureCitation>
). Anchor point of polypide retractor muscles not clearly seen.
</paragraph>
<paragraph id="DA0336F2567B554E09BEFEA08ABBFE0F" blockId="73.[151,1437,151,824]" pageId="73" pageNumber="74">
One very small oval zooid encountered that may be ancestrula, very close to proximal curved tail of large zooid that may have budded from it (
<figureCitation id="42872A77567B554E0B39FEC488D5FEE3" box="[576,671,332,357]" captionStart="FIGURE 48" captionStartId="72.[151,250,1911,1933]" captionTargetBox="[151,1436,210,1859]" captionTargetId="figure@72.[151,1436,210,1859]" captionTargetPageId="72" captionText="FIGURE 48. Haywardozoon pacificum n. sp. Holotype, ZIRAS 1/50726. AF, autozooids disposed on serpulid tube, all slightly collapsed through drying; G, H, orificial region showing operculum-like flap; I, autozooid, with dwarf ancestrular at lower right; J, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm." httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="73" pageNumber="74">
Fig.
<date id="AE021032567B554E0B0FFEC488D5FEE3" box="[630,671,332,356]" pageId="73" pageNumber="74" value="1948-01">48I</date>
</figureCitation>
). Orifice of small zooid (
<figureCitation id="42872A77567B554E0AC6FEC48E57FEE3" box="[959,1053,332,357]" captionStart="FIGURE 48" captionStartId="72.[151,250,1911,1933]" captionTargetBox="[151,1436,210,1859]" captionTargetId="figure@72.[151,1436,210,1859]" captionTargetPageId="72" captionText="FIGURE 48. Haywardozoon pacificum n. sp. Holotype, ZIRAS 1/50726. AF, autozooids disposed on serpulid tube, all slightly collapsed through drying; G, H, orificial region showing operculum-like flap; I, autozooid, with dwarf ancestrular at lower right; J, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm." httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="73" pageNumber="74">Fig. 48J</figureCitation>
) identical in form to that of large zooids).
</paragraph>
<paragraph id="DA0336F2567B554E09BEFE1C8971FE72" blockId="73.[151,1437,151,824]" pageId="73" pageNumber="74">
<emphasis id="E8C8EAE0567B554E09BEFE1C8B86FE2A" bold="true" box="[199,460,404,429]" pageId="73" pageNumber="74">Measurements (mm).</emphasis>
<typeStatus id="05078850567B554E08A2FE1C880CFE2A" box="[475,582,404,429]" pageId="73" pageNumber="74" type="holotype">Holotype</typeStatus>
, ZIRAS 1/50726 (
<figureCitation id="42872A77567B554E0A50FE1C89CDFE2B" box="[809,903,404,429]" captionStart="FIGURE 47" captionStartId="71.[151,250,1878,1900]" captionTargetBox="[162,1427,193,1859]" captionTargetId="figure@71.[162,1427,193,1859]" captionTargetPageId="71" captionText="FIGURE 47. Haywardozoon pacificum n. sp. Specimens stained in Rose Bengal. A, specimen GLD411, Stn 214, zooids on a serpulid tube; BG, holotype, ZIRAS 1/50726, different views of zooids on a serpulid tube; HJ, specimen GLD412, Stn 245, respectively showing very lightly stained zooids on serpulid tube and two zooids seen in transmitted light. Abbreviations: bb, brown body; d, diaphragm; dmd, dilator muscles of diaphragm; g, gut; olf, operculum-like flap; rmtc, retractor muscles of tentacle crown; t, tentacle cluster; v, vestibule. Scale bars: AH, 500 µm; I, J, 100 µm." httpUri="https://zenodo.org/record/1437943/files/figure.png" pageId="73" pageNumber="74">Figs 47</figureCitation>
,
<figureCitation id="42872A77567B554E0AE3FE1C89F0FE2B" box="[922,954,404,428]" captionStart="FIGURE 48" captionStartId="72.[151,250,1911,1933]" captionTargetBox="[151,1436,210,1859]" captionTargetId="figure@72.[151,1436,210,1859]" captionTargetPageId="72" captionText="FIGURE 48. Haywardozoon pacificum n. sp. Holotype, ZIRAS 1/50726. AF, autozooids disposed on serpulid tube, all slightly collapsed through drying; G, H, orificial region showing operculum-like flap; I, autozooid, with dwarf ancestrular at lower right; J, close-up of ancestrula. Scale bars: A, F, 500 µm; BE, I, 250 µm; G, 200 µm; H, I, 100 µm." httpUri="https://zenodo.org/record/1437945/files/figure.png" pageId="73" pageNumber="74">48</figureCitation>
): ZL 0.7031.450 (1.048 ± 0.211); ZW 0.4380.852 (0.714 ± 0.117); OrL 0.0880.140 (0.120 ± 0.018); OrW 0.1500.203 (0.172 ± 0.019). Ancestrula (
<emphasis id="E8C8EAE0567B554E0CF7FE318FD6FE57" box="[1422,1436,441,464]" italics="true" pageId="73" pageNumber="74">n</emphasis>
= 1): AnL 0.322; AnW 0.221; AnOrL 0.027; AnOrW 0.059.
</paragraph>
</subSubSection>
<subSubSection id="92A66579567B554E09BEFE778922FD77" pageId="73" pageNumber="74" type="discussion">
<paragraph id="DA0336F2567B554E09BEFE7789EDFDBB" blockId="73.[151,1437,151,824]" pageId="73" pageNumber="74">
<emphasis id="E8C8EAE0567B554E09BEFE778B71FD9F" bold="true" box="[199,315,511,536]" pageId="73" pageNumber="74">Remarks.</emphasis>
We follow
<bibRefCitation id="BE2D4B03567B554E08C7FE77882BFD9F" box="[446,609,511,536]" pageId="73" pageNumber="74" refId="ref35064" refString="Jebram, D. (1986) The ontogenetical and supposed phylogenetical fate of the parietal muscles in the Ctenostomata (Bryozoa). Zeitschrift fur Zoologische und Systematische Evolutionsforschung, 24, 58 - 82. https: // doi. org / 10.1111 / j. 1439 - 0469.1986. tb 00616. x" type="journal article">Jebram (1986)</bibRefCitation>
in including
<taxonomicName id="1DBC4D71567B554E0B8FFE7789FEFD9F" authorityName="d'Hondt" authorityYear="1983" box="[758,948,511,536]" class="Gymnolaemata" family="Haywardozoidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="73" pageNumber="74" phylum="Bryozoa" rank="family">Haywardozoidae</taxonomicName>
in superfamily Hislopioidea, and Reverter- Gil
<emphasis id="E8C8EAE0567B554E09BBFDAD8AB9FDBA" box="[194,243,548,573]" italics="true" pageId="73" pageNumber="74">et al</emphasis>
. (2016) concerning the emended spelling of the family name.
</paragraph>
<paragraph id="DA0336F2567B554E09BEFDC08922FD77" blockId="73.[151,1437,151,824]" pageId="73" pageNumber="74">
Our material conforms to the overall characters of the two described Atlantic species of
<taxonomicName id="1DBC4D71567B554E0D92FDCF8FDFFDE7" authorityName="d'Hondt" authorityYear="1983" box="[1259,1429,583,608]" class="Gymnolaemata" family="Haywardozoidae" genus="Haywardozoon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="73" pageNumber="74" phylum="Bryozoa" rank="genus">
<emphasis id="E8C8EAE0567B554E0D92FDCF8FDFFDE7" box="[1259,1429,583,608]" italics="true" pageId="73" pageNumber="74">Haywardozoon</emphasis>
</taxonomicName>
, especially
<taxonomicName id="1DBC4D71567B554E0877FDE58BE6FD03" baseAuthorityName="Hayward" baseAuthorityYear="1978" box="[270,428,621,644]" class="Gymnolaemata" family="Haywardozoidae" genus="Haywardozoon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="73" pageNumber="74" phylum="Bryozoa" rank="species" species="inarmatum">
<emphasis id="E8C8EAE0567B554E0877FDE58BE6FD03" box="[270,428,621,644]" italics="true" pageId="73" pageNumber="74">H. inarmatum</emphasis>
</taxonomicName>
, which has a similar budding pattern and zooid shape, but from which it differs in details of the orifice. DHondt (1983) characterized the polypide of
<taxonomicName id="1DBC4D71567B554E0A3AFD0789A7FD2F" authorityName="d'Hondt" authorityYear="1983" box="[835,1005,655,680]" class="Gymnolaemata" family="Haywardozoidae" genus="Haywardozoon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="73" pageNumber="74" phylum="Bryozoa" rank="genus">
<emphasis id="E8C8EAE0567B554E0A3AFD0789A7FD2F" box="[835,1005,655,680]" italics="true" pageId="73" pageNumber="74">Haywardozoon</emphasis>
</taxonomicName>
species as “minute … inhabiting only a very small portion of the zoecial cavity”, which is not the case in
<taxonomicName id="1DBC4D71567B554E0ADCFD3D8E7DFD4B" authority="Grischenko &amp; Gordon &amp; Melnik, 2018" authorityName="Grischenko &amp; Gordon &amp; Melnik" authorityYear="2018" box="[933,1079,692,716]" class="Gymnolaemata" family="Haywardozoidae" genus="Haywardozoon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ctenostomatida" pageId="73" pageNumber="74" phylum="Bryozoa" rank="species" species="pacificum" status="sp. nov.">
<emphasis id="E8C8EAE0567B554E0ADCFD3D8E7DFD4B" box="[933,1079,692,716]" italics="true" pageId="73" pageNumber="74">H. pacificum</emphasis>
</taxonomicName>
<emphasis id="E8C8EAE0567B554E0D38FD3C8ECBFD4A" bold="true" box="[1089,1153,692,717]" pageId="73" pageNumber="74">
<taxonomicNameLabel id="F3FB579B567B554E0D38FD3C8ECBFD4A" box="[1089,1153,692,717]" pageId="73" pageNumber="74" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
The CCZ colonies were found only on tubes of serpulid polychaetes attached to nodules.
</paragraph>
</subSubSection>
<subSubSection id="92A66579567B554E09BEFD748958FCB0" pageId="73" pageNumber="74" type="distribution">
<paragraph id="DA0336F2567B554E09BEFD748958FCB0" blockId="73.[151,1437,151,824]" pageId="73" pageNumber="74">
<emphasis id="E8C8EAE0567B554E09BEFD748B2AFC92" bold="true" box="[199,352,764,789]" pageId="73" pageNumber="74">Distribution.</emphasis>
Recorded from eight stations within coordinates 12.26676
<geoCoordinate id="BF885035567B554E0D9EFD748FD2FC93" box="[1255,1432,764,789]" direction="north" orientation="latitude" pageId="73" pageNumber="74" precision="1" value="13.61415">13.61415° N</geoCoordinate>
, 130.82158
<geoCoordinate id="BF885035567B554E0867FC978BF5FCB0" box="[286,447,799,824]" direction="west" orientation="longitude" pageId="73" pageNumber="74" precision="1" value="-134.59811">134.59811° W</geoCoordinate>
, at depth range
<quantity id="1D449B17567B554E0B09FC978944FCB0" box="[624,782,799,824]" metricMagnitude="3" metricUnit="m" metricValue="4.8955" metricValueMax="5.05" metricValueMin="4.741" pageId="73" pageNumber="74" unit="m" value="4895.5" valueMax="5050.0" valueMin="4741.0">47415050 m</quantity>
.
</paragraph>
</subSubSection>
</treatment>
</document>