229 lines
29 KiB
XML
229 lines
29 KiB
XML
<document id="3E1830A8059E95ACACB999920E310D99" ID-DOI="10.11646/zootaxa.3692.1.6" ID-GBIF-Dataset="52a51f5e-bc73-4d57-8200-f198a12a905d" ID-ISSN="1175-5326" ID-Zenodo-Dep="224084" ID-ZooBank="E86E41ED-D12B-4E3D-9FA3-25C8B2923183" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1460652317831" checkinUser="plazi" docAuthor="Göcke, Christian & Janussen, Dorte" docDate="2013" docId="03C387F0AB1AFFDDFF6AFF720AADFCEB" docLanguage="en" docName="zt03692p122.pdf" docOrigin="Zootaxa 3692 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Rossella nuda Topsent 1901" docType="treatment" docVersion="10" lastPageNumber="116" masterDocId="FFFAFF88AB16FFD3FFFDFFE50842FFFF" masterDocTitle="Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition — Antarctic Eastern Weddell Sea" masterLastPageNumber="122" masterPageNumber="102" pageNumber="114" updateTime="1698344102081" updateUser="plazi">
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<mods:title id="CFEC8E192700D1DE4EC3B6185D12D5A6">Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition — Antarctic Eastern Weddell Sea</mods:title>
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<mods:namePart id="22986717AE62BE41AE324BA8AAA4EAB1">Göcke, Christian</mods:namePart>
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<mods:namePart id="B25186CF1A163706850C4E1A25B9AE04">Janussen, Dorte</mods:namePart>
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<mods:date id="B859DEB6BB3FCF6C398EB46FA25C07F1">2013</mods:date>
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<treatment id="03C387F0AB1AFFDDFF6AFF720AADFCEB" ID-DOI="http://doi.org/10.5281/zenodo.5631278" ID-GBIF-Taxon="119573375" ID-Zenodo-Dep="5631278" LSID="urn:lsid:plazi:treatment:03C387F0AB1AFFDDFF6AFF720AADFCEB" httpUri="http://treatment.plazi.org/id/03C387F0AB1AFFDDFF6AFF720AADFCEB" lastPageId="14" lastPageNumber="116" pageId="12" pageNumber="114">
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<subSubSection id="C370656DAB1AFFDFFF6AFF7208A5FE90" pageId="12" pageNumber="114" type="nomenclature">
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<paragraph id="8BD536E6AB1AFFDFFF6AFF7209B1FF4E" blockId="12.[151,499,151,210]" box="[151,499,151,177]" pageId="12" pageNumber="114">
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<heading id="D09D818AAB1AFFDFFF6AFF7209B1FF4E" bold="true" box="[151,499,151,177]" fontSize="11" level="1" pageId="12" pageNumber="114" reason="1">
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<taxonomicName id="4C6A4D65AB1AFFDFFF6AFF7209B1FF4E" ID-CoL="6WY7N" authority="Topsent, 1901" authorityName="Topsent" authorityYear="1901" box="[151,499,151,177]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="12" pageNumber="114" phylum="Porifera" rank="species" species="nuda">
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<emphasis id="B91EEAF4AB1AFFDFFF6AFF7209B1FF4E" bold="true" box="[151,499,151,177]" pageId="12" pageNumber="114">
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<emphasis id="B91EEAF4AB1AFFDFFF6AFF720903FF4E" bold="true" box="[151,321,151,177]" italics="true" pageId="12" pageNumber="114">Rossella nuda</emphasis>
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Topsent, 1901
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</emphasis>
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</taxonomicName>
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</heading>
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</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF6AFF5F093FFF2D" blockId="12.[151,499,151,210]" box="[151,381,186,210]" pageId="12" pageNumber="114">
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(
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<figureCitation id="13512A63AB1AFFDFFF62FF5F08AFFF2D" box="[159,237,186,210]" captionStart="FIGURE 2" captionStartId="4.[151,250,1507,1530]" captionTargetBox="[158,1436,481,1486]" captionTargetId="figure@4.[158,1443,481,1486]" captionTargetPageId="4" captionText="FIGURE 2. Habitus-pictures of Rossella spp. A – B, Rossella antarctica, A lateral view (SMF 11913) with spicular fringe visible at the top, B, section (SMF 11921). C, Rossella fibulata, SMF 11906. D, Rossella levis (SMF 11728) photographed ex situ on board RV Polarstern. E, Rossella nuda (SMF 11715) photographed ex situ on board RV Polarstern. F, Rossella racovitzae (SMF 11871) with specimen of Tetilla leptoderma attached, photographed ex situ on board RV Polarstern. G, Rossella vanhoeffeni armata (ZMH S 2932)." httpUri="https://zenodo.org/record/224085/files/figure.png" pageId="12" pageNumber="114">Figs. 2</figureCitation>
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E, 6,
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<tableCitation id="C6E8035DAB1AFFDFFED3FF5F0936FF2D" box="[302,372,186,210]" captionStart="TABLE 5" captionStartId="12.[151,239,1044,1068]" captionText="TABLE 5. Spicule sizes of Rossella nuda Topsent, 1901. Values in μm are given as follows: minimum – mean –" pageId="12" pageNumber="114">Tab. 5</tableCitation>
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)
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</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF6AFF18094EFEED" blockId="12.[151,1436,253,398]" box="[151,268,253,274]" pageId="12" pageNumber="114">Synonymy:</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF6AFEF908A5FE90" blockId="12.[151,1436,253,398]" pageId="12" pageNumber="114">
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<taxonomicName id="4C6A4D65AB1AFFDFFF6AFEF909A1FECE" authority="Topsent, 1901a: 4" authorityName="Topsent" authorityPageNumber="4" authorityYear="1901" box="[151,483,283,306]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="12" pageNumber="114" phylum="Porifera" rank="species" species="nuda">
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<emphasis id="B91EEAF4AB1AFFDFFF6AFEF90964FECD" box="[151,294,284,306]" italics="true" pageId="12" pageNumber="114">Rossella nuda</emphasis>
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Topsent, 1901a: 4
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</taxonomicName>
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–5; 1901b: 32–33, pl. 1, fig. 7, pl. 4, figs. 8–13. Burton 1929 (pars): 409–412, figs. 1–2, pl. 2; 1932: 255–256, figs. 1–2; 1934: 7. Koltun 1976 (pars): 165, pl. 1–3. Barthel & Tendal 1994: 99–101, fig. 39–40, pl. 9– 10.
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</paragraph>
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</subSubSection>
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<subSubSection id="C370656DAB1AFFDFFF6AFE9D0C51FE72" box="[151,1043,376,398]" pageId="12" pageNumber="114" type="description">
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<paragraph id="8BD536E6AB1AFFDFFF6AFE9D0C51FE72" blockId="12.[151,1436,253,398]" box="[151,1043,376,398]" pageId="12" pageNumber="114">
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<emphasis id="B91EEAF4AB1AFFDFFF6AFE9D0920FE71" box="[151,354,376,398]" italics="true" pageId="12" pageNumber="114">Hyalyscus hodgsoni</emphasis>
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Kirkpatrick, 1907: 3–5, pl. 3, fig. 1, pl. 4, fig. 1. Burton 1929: 411.
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</paragraph>
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</subSubSection>
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<subSubSection id="C370656DAB1AFFDFFF6AFE5009C9FDEA" pageId="12" pageNumber="114" type="materials_examined">
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<paragraph id="8BD536E6AB1AFFDFFF6AFE5009C9FDEA" blockId="12.[151,1437,437,1002]" pageId="12" pageNumber="114">
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<emphasis id="B91EEAF4AB1AFFDFFF6AFE5009C2FE31" bold="true" box="[151,384,437,462]" pageId="12" pageNumber="114">Material examined.</emphasis>
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<specimenCount id="9D6CFD6FAB1AFFDFFE7AFE500A53FE32" box="[391,529,437,461]" pageId="12" pageNumber="114" type="generic">2 specimens</specimenCount>
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from SYSTCO-station 48-1, one was sampled alive (SMF 11715), one was dead (SMF 11901).
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<emphasis id="B91EEAF4AB1AFFDFFEBFFE3C0A20FE0E" box="[322,610,473,497]" italics="true" pageId="12" pageNumber="114">Other material examined</emphasis>
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: IRSNB POR. 0 0 3 (
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<typeStatus id="54D18844AB1AFFDFFCABFE3C0BC9FE0E" box="[854,907,473,497]" pageId="12" pageNumber="114">type</typeStatus>
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), BMNH 1928.11.15.2, BMNH 1928.11.15.6, BMNH 1928.11.15.7.
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</paragraph>
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</subSubSection>
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<subSubSection id="C370656DAB1AFFDDFF3AFDC50D0AFDC3" lastPageId="14" lastPageNumber="116" pageId="12" pageNumber="114" type="description">
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<paragraph id="8BD536E6AB1AFFDFFF3AFDC50DDFFD12" blockId="12.[151,1437,437,1002]" pageId="12" pageNumber="114">
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<emphasis id="B91EEAF4AB1AFFDFFF3AFDC5091BFDC6" bold="true" box="[199,345,544,569]" pageId="12" pageNumber="114">Description.</emphasis>
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The description given in here is concentrated on the one specimen still alive when captured (
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<figureCitation id="13512A63AB1AFFDFFA93FDC408E7FDA2" captionStart="FIGURE 2" captionStartId="4.[151,250,1507,1530]" captionTargetBox="[158,1436,481,1486]" captionTargetId="figure@4.[158,1443,481,1486]" captionTargetPageId="4" captionText="FIGURE 2. Habitus-pictures of Rossella spp. A – B, Rossella antarctica, A lateral view (SMF 11913) with spicular fringe visible at the top, B, section (SMF 11921). C, Rossella fibulata, SMF 11906. D, Rossella levis (SMF 11728) photographed ex situ on board RV Polarstern. E, Rossella nuda (SMF 11715) photographed ex situ on board RV Polarstern. F, Rossella racovitzae (SMF 11871) with specimen of Tetilla leptoderma attached, photographed ex situ on board RV Polarstern. G, Rossella vanhoeffeni armata (ZMH S 2932)." httpUri="https://zenodo.org/record/224085/files/figure.png" pageId="12" pageNumber="114">Fig. 2</figureCitation>
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E). This specimen was
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<quantity id="4C929B03AB1AFFDFFE4AFDA009BFFDA2" box="[439,509,581,605]" metricMagnitude="-1" metricUnit="m" metricValue="4.0" pageId="12" pageNumber="114" unit="cm" value="40.0">40 cm</quantity>
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high. It has a very tight tissue with a smooth surface, which is absolutely bare of any conules or protruding spicules. A basal tuft of spicules could not be documented, as the basis of the specimen was torn off. The body wall is up to
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<quantity id="4C929B03AB1AFFDFFDCCFD680A2AFD5A" box="[561,616,653,677]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" pageId="12" pageNumber="114" unit="cm" value="3.0">3 cm</quantity>
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thick. Within the tissue, some larger cavities can be found, which do not open up to visible pores, neither on the inner nor on the outer surface. The specimen was barrel-shaped with a large osculum on the top, it has collapsed while dredging. The color is light brown when living and preserved in ethanol.
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</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF3AFD1C09B7FC15" blockId="12.[151,1437,437,1002]" pageId="12" pageNumber="114">
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The most typical spicule of this species is its calycocome (
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<figureCitation id="13512A63AB1AFFDFFC9CFD1C0BE7FCEE" box="[865,933,761,785]" captionStart="FIGURE 6" captionStartId="13.[151,250,1955,1978]" captionTargetBox="[315,1271,195,1934]" captionTargetId="figure@13.[315,1272,195,1934]" captionTargetPageId="13" captionText="FIGURE 6. Spicules of Rossella nuda Topsent, 1901 (SMF 11715). A, microdiscohexaster, B, isolated ray of microdiscohexaster, C – D, mesodiscohexasters, E, oxyhexaster, F – G, complete rays of calycocomes." httpUri="https://zenodo.org/record/224089/files/figure.png" pageId="12" pageNumber="114">Fig. 6</figureCitation>
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F–G). It is relatively large, up to 350 µm in diameter, probably even up to 400 µm, when estimating from the length of separated rays (
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<tableCitation id="C6E8035DAB1AFFDFFB34FCF80D54FCCA" box="[1225,1302,797,821]" captionStart="TABLE 5" captionStartId="12.[151,239,1044,1068]" captionText="TABLE 5. Spicule sizes of Rossella nuda Topsent, 1901. Values in μm are given as follows: minimum – mean –" pageId="12" pageNumber="114">Tab. 5</tableCitation>
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). The most characteristic aspect of this calycocome is the number of its secondary rays, which are usually not more than 4. Microdiscohexasters (
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<figureCitation id="13512A63AB1AFFDFFE6CFC800994FC82" box="[401,470,869,893]" captionStart="FIGURE 6" captionStartId="13.[151,250,1955,1978]" captionTargetBox="[315,1271,195,1934]" captionTargetId="figure@13.[315,1272,195,1934]" captionTargetPageId="13" captionText="FIGURE 6. Spicules of Rossella nuda Topsent, 1901 (SMF 11715). A, microdiscohexaster, B, isolated ray of microdiscohexaster, C – D, mesodiscohexasters, E, oxyhexaster, F – G, complete rays of calycocomes." httpUri="https://zenodo.org/record/224089/files/figure.png" pageId="12" pageNumber="114">Fig. 6</figureCitation>
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A–B) have secondary rays of two different lengths. They are relatively large, with mean diameters of 63 µm and a maximum of 75 µm. Mesodiscohexasters (
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<figureCitation id="13512A63AB1AFFDFFC08FC6C0C7BFC5E" box="[1013,1081,905,929]" captionStart="FIGURE 6" captionStartId="13.[151,250,1955,1978]" captionTargetBox="[315,1271,195,1934]" captionTargetId="figure@13.[315,1272,195,1934]" captionTargetPageId="13" captionText="FIGURE 6. Spicules of Rossella nuda Topsent, 1901 (SMF 11715). A, microdiscohexaster, B, isolated ray of microdiscohexaster, C – D, mesodiscohexasters, E, oxyhexaster, F – G, complete rays of calycocomes." httpUri="https://zenodo.org/record/224089/files/figure.png" pageId="12" pageNumber="114">Fig. 6</figureCitation>
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C–D) are 120 µm in diameter. Oxyhexactins are 115 µm, they are rather rare. Oxyhexasters (
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<figureCitation id="13512A63AB1AFFDFFCAEFC480BD4FC3A" box="[851,918,941,965]" captionStart="FIGURE 6" captionStartId="13.[151,250,1955,1978]" captionTargetBox="[315,1271,195,1934]" captionTargetId="figure@13.[315,1272,195,1934]" captionTargetPageId="13" captionText="FIGURE 6. Spicules of Rossella nuda Topsent, 1901 (SMF 11715). A, microdiscohexaster, B, isolated ray of microdiscohexaster, C – D, mesodiscohexasters, E, oxyhexaster, F – G, complete rays of calycocomes." httpUri="https://zenodo.org/record/224089/files/figure.png" pageId="12" pageNumber="114">Fig. 6</figureCitation>
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E) are on average 130 µm in diameter, with a maximum diameter of 200 µm.
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</paragraph>
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<caption id="DF15666EAB1AFFDFFF6AFBF10DDEFBD3" box="[151,1436,1043,1068]" pageId="12" pageNumber="114">
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<paragraph id="8BD536E6AB1AFFDFFF6AFBF10DDEFBD3" blockId="12.[151,1436,1043,1989]" box="[151,1436,1043,1068]" pageId="12" pageNumber="114">
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<emphasis id="B91EEAF4AB1AFFDFFF6AFBF1094FFBD3" bold="true" box="[151,269,1044,1068]" pageId="12" pageNumber="114">TABLE 5.</emphasis>
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Spicule sizes of
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<taxonomicName id="4C6A4D65AB1AFFDFFE28FBF00B58FBD3" authority="Topsent, 1901" authorityName="Topsent" authorityYear="1901" box="[469,794,1045,1068]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="12" pageNumber="114" phylum="Porifera" rank="species" species="nuda">
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<emphasis id="B91EEAF4AB1AFFDFFE28FBF00A32FBD3" box="[469,624,1045,1068]" italics="true" pageId="12" pageNumber="114">Rossella nuda</emphasis>
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Topsent, 1901
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</taxonomicName>
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. Values in μm are given as follows: minimum – mean –
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</paragraph>
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</caption>
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<paragraph id="8BD536E6AB1AFFDFFF6AFBD00DDEFBB3" blockId="12.[151,1436,1043,1989]" box="[151,1436,1077,1100]" pageId="12" pageNumber="114">maximum (number of spicules measured). For comparison, values from Topsent (1901b) and Barthel & Tendal (1994)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF6AFBB00943FB93" blockId="12.[151,1436,1043,1989]" box="[151,257,1109,1132]" pageId="12" pageNumber="114">are given.</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FB600D17FB65" blockId="12.[151,1436,1043,1989]" box="[159,1365,1155,1178]" pageId="12" pageNumber="114">parameter SMF 11715 Topsent (1901b) Barthel & Tendal (1994)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FB4F097CFB3F" blockId="12.[151,1436,1043,1989]" box="[159,318,1194,1216]" pageId="12" pageNumber="114">rough Pentactin</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF49FB340B52FAF1" blockId="12.[151,1436,1043,1989]" pageId="12" pageNumber="114">tangential ray (L) 100–130.5–170 (30) 500–800 proximal ray (L) 120–125–130 (2)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FAFB0B6BFACA" blockId="12.[151,1436,1043,1989]" box="[159,809,1310,1333]" pageId="12" pageNumber="114">rough Hexactin (D) 150–533–1675 (30)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FAA00911FAA3" blockId="12.[151,1436,1043,1989]" box="[159,339,1349,1372]" pageId="12" pageNumber="114">Stauractin ray (L)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FA8E0B40FA7D" blockId="12.[151,1436,1043,1989]" box="[159,770,1387,1410]" pageId="12" pageNumber="114">Oxyhexactin (D) 90–115–140 (2)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FA770CC0FA57" blockId="12.[151,1436,1043,1989]" box="[159,1154,1426,1449]" pageId="12" pageNumber="114">Oxyhexaster (D) 90–128.1–200 (35) 120 120</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FA5C0912FA2F" blockId="12.[151,1436,1043,1989]" box="[159,336,1465,1488]" pageId="12" pageNumber="114">Heterodiactin (L)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62FA050AE9FA09" blockId="12.[151,1436,1043,1989]" box="[159,683,1504,1526]" pageId="12" pageNumber="114">Discohexactin (D) 130 (1)</paragraph>
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<paragraph id="8BD536E6AB1AFFDFFF62F9E30CD9F9E3" blockId="12.[151,1436,1043,1989]" box="[159,1179,1542,1565]" pageId="12" pageNumber="114">Microdiscohexaster (D) 37.5–63.3–75 (30) 40–50 40–75</paragraph>
|
||
<paragraph id="8BD536E6AB1AFFDFFF62F9C80CC0F9BC" blockId="12.[151,1436,1043,1989]" box="[159,1154,1581,1604]" pageId="12" pageNumber="114">Mesodiscohexaster (D) 62.5–121.4–155 (30) 100 100</paragraph>
|
||
<paragraph id="8BD536E6AB1AFFDFFF62F9B6095FF996" blockId="12.[151,1436,1043,1989]" box="[159,285,1619,1641]" pageId="12" pageNumber="114">Calycocome</paragraph>
|
||
<paragraph id="8BD536E6AB1AFFDFFF49F99E0B6DF947" blockId="12.[151,1436,1043,1989]" pageId="12" pageNumber="114">(D) 330–340–350 (2) 250 250 complete ray (L) 140–172.7–200 (30)</paragraph>
|
||
<paragraph id="8BD536E6AB1AFFDFFF49F92D0B0AF8D3" blockId="12.[151,1436,1043,1989]" pageId="12" pageNumber="114">primary ray (L) 7.5–13.4–20 (30) 15 15 middle piece (L) 15–27.7–50 (30) 25 25 secondary ray (L) 97.5–128.3–162.5 (30)</paragraph>
|
||
<paragraph id="8BD536E6AB1AFFDFFF49F8DE0AD4F887" blockId="12.[151,1436,1043,1989]" pageId="12" pageNumber="114">number of sec. rays 2–3.6–4 (30) 2–3 2–4 Curvature S: 25</paragraph>
|
||
<paragraph id="8BD536E6AB1AFFDFFD9CF86F0AE0F860" blockId="12.[151,1436,1043,1989]" box="[609,674,1929,1951]" pageId="12" pageNumber="114">S-C: 5</paragraph>
|
||
<paragraph id="8BD536E6AB1AFFDFFD9CF8550ACEF83A" blockId="12.[151,1436,1043,1989]" box="[609,652,1968,1989]" pageId="12" pageNumber="114">C: 0</paragraph>
|
||
<caption id="DF15666EAB1BFFDEFF6AF8460CCEF827" httpUri="https://zenodo.org/record/224089/files/figure.png" pageId="13" pageNumber="115" targetBox="[315,1271,195,1934]" targetPageId="13">
|
||
<paragraph id="8BD536E6AB1BFFDEFF6AF8460CCEF827" blockId="13.[151,1436,1955,2009]" pageId="13" pageNumber="115">
|
||
<emphasis id="B91EEAF4AB1BFFDEFF6AF846095CF846" bold="true" box="[151,286,1955,1978]" pageId="13" pageNumber="115">FIGURE 6.</emphasis>
|
||
Spicules of
|
||
<taxonomicName id="4C6A4D65AB1BFFDEFE42F8410B44F846" authority="Topsent, 1901" authorityName="Topsent" authorityYear="1901" box="[447,774,1956,1978]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="13" pageNumber="115" phylum="Porifera" rank="species" species="nuda">
|
||
<emphasis id="B91EEAF4AB1BFFDEFE42F8410A1AF845" box="[447,600,1956,1978]" italics="true" pageId="13" pageNumber="115">Rossella nuda</emphasis>
|
||
Topsent, 1901
|
||
</taxonomicName>
|
||
(SMF 11715). A, microdiscohexaster, B, isolated ray of microdiscohexaster, C–D, mesodiscohexasters, E, oxyhexaster, F–G, complete rays of calycocomes.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="8BD536E6AB18FFDDFF3AFF720D0AFDC3" blockId="14.[151,1436,151,788]" pageId="14" pageNumber="116">
|
||
Our spicule measurements correspond to those reported by Barthel and Tendal (1994), but extend our knowledge of the character variations of most spicules in this species. For calycocomes, Barthel and Tendal reported sizes of 250 µm and more in diameter (thus simply following the description in Topsent (1901b)). We can now state, that they reach up to 400 µm and are therefore amongst the largest calycocomes known from the genus
|
||
<taxonomicName id="4C6A4D65AB18FFDDFF6AFECD08B4FEBF" box="[151,246,296,320]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="genus">
|
||
<emphasis id="B91EEAF4AB18FFDDFF6AFECD08B4FEBF" box="[151,246,296,320]" italics="true" pageId="14" pageNumber="116">Rossella</emphasis>
|
||
</taxonomicName>
|
||
. The very large microdiscohexasters, also the largest known from any
|
||
<taxonomicName id="4C6A4D65AB18FFDDFBF4FECD0C2AFEBF" box="[1033,1128,296,320]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="genus">
|
||
<emphasis id="B91EEAF4AB18FFDDFBF4FECD0C2AFEBF" box="[1033,1128,296,320]" italics="true" pageId="14" pageNumber="116">Rossella</emphasis>
|
||
</taxonomicName>
|
||
species, are well within the spectrum previously known. Mesodiscohexasters however, up to 155 µm in diameter, are much larger than previously documented (up to 100 µm, Barthel & Tendal (1994)). This corresponds to the observation, that many sponges from this station have spicules significantly larger than known elsewhere, especially discohexasters, oxyhexasters and oxyhexactins. Nonetheless, this finding complicates the differentiation between
|
||
<taxonomicName id="4C6A4D65AB18FFDDFB0CFE5C0D08FE2F" box="[1265,1354,440,464]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="nuda">
|
||
<emphasis id="B91EEAF4AB18FFDDFB0CFE5C0D08FE2F" box="[1265,1354,440,464]" italics="true" pageId="14" pageNumber="116">R. nuda</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C6A4D65AB18FFDDFA79FE5C0958FE0B" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="vanhoeffeni">
|
||
<emphasis id="B91EEAF4AB18FFDDFA79FE5C0958FE0B" italics="true" pageId="14" pageNumber="116">R. vanhoeffeni</emphasis>
|
||
</taxonomicName>
|
||
, as the latter was formerly reported to have mesodiscohexasters reaching more than 150 µm, while
|
||
<taxonomicName id="4C6A4D65AB18FFDDFA79FE38088DFDE7" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="nuda">
|
||
<emphasis id="B91EEAF4AB18FFDDFA79FE38088DFDE7" italics="true" pageId="14" pageNumber="116">R. nuda</emphasis>
|
||
</taxonomicName>
|
||
was considered only to possess specimens of 100 µm or less. Consequently a reliable differentiation between
|
||
<taxonomicName id="4C6A4D65AB18FFDDFF6AFDC008ACFDC3" box="[151,238,548,572]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="nuda">
|
||
<emphasis id="B91EEAF4AB18FFDDFF6AFDC008ACFDC3" box="[151,238,548,572]" italics="true" pageId="14" pageNumber="116">R. nuda</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C6A4D65AB18FFDDFED9FDC00984FDC3" box="[292,454,548,572]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="vanhoeffeni">
|
||
<emphasis id="B91EEAF4AB18FFDDFED9FDC00984FDC3" box="[292,454,548,572]" italics="true" pageId="14" pageNumber="116">R. vanhoeffeni</emphasis>
|
||
</taxonomicName>
|
||
can now only be reached on the basis of their calycocomes, as described above.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C370656DAB18FFDDFF3AFDAD0AADFCEB" pageId="14" pageNumber="116" type="discussion">
|
||
<paragraph id="8BD536E6AB18FFDDFF3AFDAD0AADFCEB" blockId="14.[151,1436,151,788]" pageId="14" pageNumber="116">
|
||
<emphasis id="B91EEAF4AB18FFDDFF3AFDAD0979FD9F" bold="true" box="[199,315,584,608]" pageId="14" pageNumber="116">Remarks.</emphasis>
|
||
Burton (1929) synonymized several species with
|
||
<taxonomicName id="4C6A4D65AB18FFDDFC7DFDAC0B98FD9F" box="[896,986,584,608]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="nuda">
|
||
<emphasis id="B91EEAF4AB18FFDDFC7DFDAC0B98FD9F" box="[896,986,584,608]" italics="true" pageId="14" pageNumber="116">R. nuda</emphasis>
|
||
</taxonomicName>
|
||
, including
|
||
<taxonomicName id="4C6A4D65AB18FFDDFBA3FDAC0D46FD9F" box="[1118,1284,584,608]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="vanhoeffeni">
|
||
<emphasis id="B91EEAF4AB18FFDDFBA3FDAC0D46FD9F" box="[1118,1284,584,608]" italics="true" pageId="14" pageNumber="116">R. vanhoeffeni</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C6A4D65AB18FFDDFAC2FDAC0DD7FD9F" box="[1343,1429,584,608]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="levis">
|
||
<emphasis id="B91EEAF4AB18FFDDFAC2FDAC0DD7FD9F" box="[1343,1429,584,608]" italics="true" pageId="14" pageNumber="116">R. levis</emphasis>
|
||
</taxonomicName>
|
||
. These particular species can in fact be differentiated clearly from
|
||
<taxonomicName id="4C6A4D65AB18FFDDFC7DFD880B9AFD7B" box="[896,984,620,644]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="nuda">
|
||
<emphasis id="B91EEAF4AB18FFDDFC7DFD880B9AFD7B" box="[896,984,620,644]" italics="true" pageId="14" pageNumber="116">R. nuda</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
<taxonomicName id="4C6A4D65AB18FFDDFC1AFD880CC8FD7B" box="[999,1162,620,644]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="vanhoeffeni">
|
||
<emphasis id="B91EEAF4AB18FFDDFC1AFD880CC8FD7B" box="[999,1162,620,644]" italics="true" pageId="14" pageNumber="116">R. vanhoeffeni</emphasis>
|
||
</taxonomicName>
|
||
has a similar shape, but calycocomes usually have more than 4 secondary rays on each primary ray. It therefore shows much more similarities with
|
||
<taxonomicName id="4C6A4D65AB18FFDDFEA8FD5009A8FD33" box="[341,490,693,716]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="racovitzae">
|
||
<emphasis id="B91EEAF4AB18FFDDFEA8FD5009A8FD33" box="[341,490,693,716]" italics="true" pageId="14" pageNumber="116">R. racovitzae</emphasis>
|
||
</taxonomicName>
|
||
, from which it is often difficult or even impossible to distinguish (see below for
|
||
<taxonomicName id="4C6A4D65AB18FFDDFA79FD50094EFD0F" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="racovitzae">
|
||
<emphasis id="B91EEAF4AB18FFDDFA79FD50094EFD0F" italics="true" pageId="14" pageNumber="116">R. racovitzae</emphasis>
|
||
</taxonomicName>
|
||
).
|
||
<taxonomicName id="4C6A4D65AB18FFDDFED9FD3C093AFD0F" box="[292,376,728,752]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="levis">
|
||
<emphasis id="B91EEAF4AB18FFDDFED9FD3C093AFD0F" box="[292,376,728,752]" italics="true" pageId="14" pageNumber="116">R. levis</emphasis>
|
||
</taxonomicName>
|
||
(see above) can be easily distinguished as it has microdiscohexasters with secondary rays of only one length as opposed to two lengths in
|
||
<taxonomicName id="4C6A4D65AB18FFDDFD6CFD180AAAFCEB" box="[657,744,764,788]" class="Hexactinellida" family="Rossellidae" genus="Rossella" kingdom="Animalia" order="Lyssacinosida" pageId="14" pageNumber="116" phylum="Porifera" rank="species" species="nuda">
|
||
<emphasis id="B91EEAF4AB18FFDDFD6CFD180AAAFCEB" box="[657,744,764,788]" italics="true" pageId="14" pageNumber="116">R. nuda</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |