<documentid="90ABFD5994AF25BC8637574FA52DC443"ID-DOI="10.11646/zootaxa.5165.2.7"ID-GBIF-Dataset="0b3e63f8-e436-4933-8175-1fc0e46bffe1"ID-ISSN="1175-5326"ID-Zenodo-Dep="6831887"ID-ZooBank="87810F4C-9824-4EBB-AE58-1CCFD65FDEE3"IM.materialsCitations_approvedBy="juliana"IM.metadata_approvedBy="juliana"IM.tables_requiresApprovalFor="existingObjects,plazi"IM.taxonomicNames_approvedBy="felipe"IM.treatments_approvedBy="juliana"checkinTime="1657785028843"checkinUser="plazi"docAuthor="Peña Cantero, Álvaro L."docDate="2022"docId="03A987E5FFE70D592391F8DC32D665A8"docLanguage="en"docName="zootaxa.5165.2.7.pdf"docOrigin="Zootaxa 5165 (2)"docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article"docStyleId="647186512141C8FC8976D5BCC54AEB7D"docStyleName="Zootaxa.2013-.journal_article"docStyleVersion="9"docTitle="Eudendrium tottoni Stechow 1932"docType="treatment"docVersion="8"lastPageNumber="280"masterDocId="FF90FF9DFFE20D5F2306FFA8375E6339"masterDocTitle="On a few benthic hydroids (Cnidaria, Hydrozoa) from the Kerguelen Islands (southern Indian Ocean), including the description of a new species"masterLastPageNumber="286"masterPageNumber="274"pageNumber="279"updateTime="1732015425634"updateUser="juliana"zenodo-license-document="CLOSED">
<mods:titleid="AE8A059CE32C3AC879329FF4D91C5EAC">On a few benthic hydroids (Cnidaria, Hydrozoa) from the Kerguelen Islands (southern Indian Ocean), including the description of a new species</mods:title>
<mods:affiliationid="B2DEB3A1E674B205DA7DB5B4F09897FB">Instituto Cavanilles de Biodiversidad y Biología Evolutiva / Departamento de Zoología, Universidad de Valencia, Valencia, Spain, Apdo. Correos 22085, 46071 Valencia, Spain.</mods:affiliation>
<bibRefCitationid="EF914B02FFE70D5A228BF8DC356064B7"author="Stechow, E."box="[397,574,1908,1934]"pageId="5"pageNumber="279"pagination="81 - 92"refId="ref8400"refString="Stechow, E. (1932) Neue Hydroiden aus dem Mittelmeer und dem Pazifischen Ozean, nebst Bemerkungen uber einige wenig bekannte Formen. Zoologischer Anzeiger, 100 (3 - 4), 81 - 92."type="journal article"year="1932">Stechow, 1932</bibRefCitation>
<treatmentCitationid="0AA110E2FFE70D5A2287F87535E364CC"author="Hickson, S. J. & Gravely, F. H."box="[385,701,2013,2037]"page="7"pageId="5"pageNumber="279"year="1907">
<bibRefCitationid="EF914B02FFE70D5A2287F87535E364CC"author="Hickson, S. J. & Gravely, F. H."box="[385,701,2013,2037]"pageId="5"pageNumber="279"pagination="1 - 34"refId="ref7602"refString="Hickson, S. J. & Gravely, F. H. (1907) Coelenterata. II. Hydroid zoophytes. National Antarctic Expedition (S. S. Discovery) 1901 - 1904, Natural History, 3, 1 - 34."type="journal article"year="1907">Hickson & Gravely, 1907: 7–8</bibRefCitation>
<bibRefCitationid="EF914B02FFE40D59229CFF3F35DA6396"author="Totton, A. K."box="[410,644,151,175]"pageId="6"pageNumber="280"pagination="131 - 252"refId="ref8480"refString="Totton, A. K. (1930) Coelenterata. Part V. Hydroida. Natural History Report, British Antarctic ' Terra Nova' Expedition, 1910, Zoology, 5 (5), 131 - 252, pls 1 - 3."type="journal article"year="1930">Totton, 1930: 140–141</bibRefCitation>
<bibRefCitationid="EF914B02FFE40D592265FF1D357C63F4"author="Stechow, E."box="[355,546,181,205]"pageId="6"pageNumber="280"pagination="81 - 92"refId="ref8400"refString="Stechow, E. (1932) Neue Hydroiden aus dem Mittelmeer und dem Pazifischen Ozean, nebst Bemerkungen uber einige wenig bekannte Formen. Zoologischer Anzeiger, 100 (3 - 4), 81 - 92."type="journal article"year="1932">Stechow, 1932: 84</bibRefCitation>
</taxonomicName>
</treatmentCitation>
.—
<treatmentCitationid="0AA110E2FFE40D592139FF1D35B863F4"author="Millard, N. A. H."box="[575,742,181,205]"page="4"pageId="6"pageNumber="280"year="1977">
<bibRefCitationid="EF914B02FFE40D592139FF1D35B863F4"author="Millard, N. A. H."box="[575,742,181,205]"pageId="6"pageNumber="280"pagination="1 - 47"refId="ref8108"refString="Millard, N. A. H. (1977) Hydroids from the Kerguelen and Crozet shelves, collected by the cruise MD. 03 of the Marion-Dufresne. Annals of the South African Museum, 73 (1), 1 - 47."type="journal article"year="1977">Millard, 1977: 4</bibRefCitation>
<collectionCodeid="ED11AE36FFE40D592214FE8836376203"box="[274,361,288,314]"collectionName="France, Paris, Museum National d'Histoire Naturelle"country="France"httpUri="http://biocol.org/urn:lsid:biocol.org:col:34988"lsid="urn:lsid:biocol.org:col:34988"name="Museum National d'Histoire Naturelle"pageId="6"pageNumber="280">MNHN</collectionCode>
<collectionCodeid="ED11AE36FFE40D592277FEB736D16200"box="[369,399,287,313]"country="Ukraine"name="Zoological Institute, Ukrainian Academy of Sciences"pageId="6"pageNumber="280">IK</collectionCode>
high, irregularly, and sparsely branched; usually with only a few primary branches, but occasionally with second-order branches. Stolon with smooth perisarc. Stems densely ringed basally over a long extension, but smooth distally; some small stems almost completely annulated.
Male gonophores one-chambered, on completely reduced polyps; over 20 gonophores per polyp (
<figureCitationid="133B2A76FFE40D59260DFE5F323C612B"box="[1291,1378,503,530]"captionStart="FIGURE 3"captionStartId="5.[151,250,1658,1682]"captionTargetBox="[151,1436,183,1632]"captionTargetId="figure-27@5.[151,1436,181,1634]"captionTargetPageId="5"captionText="FIGURE 3. Coryne pusilla Gaertner, 1774: A, distal part of polyp; B, larger and smaller stenoteles. Eudendrium tottoni Stechow, 1932: C, polyp; D, hydranth’s basal annular swelling; E, male gonophore. Tubularia sp.: F, hydranth and gonophores. Scale bar: 900 µm (F), 600 µm (F close-up), 200 µm (A), 100 µm (C, E), 50 µm (D), 10 µm (B)."figureDoi="http://doi.org/10.5281/zenodo.6831895"httpUri="https://zenodo.org/record/6831895/files/figure.png"pageId="6"pageNumber="280">Fig. 3E</figureCitation>
).
</paragraph>
<paragraphid="8BBF36F3FFE40D5923C1FDB3348E6160"blockId="6.[151,1437,251,1682]"pageId="6"pageNumber="280">Cnidome consisting of microbasic euryteles of two size classes: 7–8 x 3.5–4 µm and 17±0.8 x 7.5±0.6 µm (n= 10), range 15.5–18.5 x 7.0–8.5 µm, the latter concentrated on hypostome.</paragraph>
Stem annulation is quite variable. As noted above, some small stems are almost completely ringed, but larger stems have the annulations restricted to some parts. As a general rule, the basal part is usually ringed. As an example, in a 15-mm-high stem, the most basal
are densely and completely annulated with more than 45 rings, but this annulation progressively vanishes after the first branch, even though it continues for four millimetres more. The first branch is also densely ringed until it passes a gonophore-bearing pedicel, which, in turn, is completely annulated. The rest of the stem and branches are smooth in general, although sometimes there are a few rings at the origin of branches.
<bibRefCitationid="EF914B02FFE40D5923C1FCF736306043"author="Millard, N. A. H."box="[199,366,863,890]"pageId="6"pageNumber="280"pagination="1 - 47"refId="ref8108"refString="Millard, N. A. H. (1977) Hydroids from the Kerguelen and Crozet shelves, collected by the cruise MD. 03 of the Marion-Dufresne. Annals of the South African Museum, 73 (1), 1 - 47."type="journal article"year="1977">Millard (1977)</bibRefCitation>
<bibRefCitationid="EF914B02FFE40D59227FFC2B357E60A7"author="Stechow, E."box="[377,544,899,926]"pageId="6"pageNumber="280"pagination="81 - 92"refId="ref8400"refString="Stechow, E. (1932) Neue Hydroiden aus dem Mittelmeer und dem Pazifischen Ozean, nebst Bemerkungen uber einige wenig bekannte Formen. Zoologischer Anzeiger, 100 (3 - 4), 81 - 92."type="journal article"year="1932">Stechow, 1932</bibRefCitation>
</taxonomicName>
. Our material is morphologically close to the latter, which had delicate colonies up to
high, but unfortunately her material was too poorly preserved to provide information on the cnidome. Millard’s material had both male and female gonophores, the former being one- to two-chambered, which would agree with our material. However, she indicated that the tentacles of the fertile polyps appear to be persistent, whereas in the present material male gonophores are on completely reduced polyps. In addition, in Millard’s material, groups of annulations are present at branch origins and rarely at other points.
<bibRefCitationid="EF914B02FFE40D592264FBF335F4674F"author="Hickson, S. J. & Gravely, F. H."box="[354,682,1115,1142]"pageId="6"pageNumber="280"pagination="1 - 34"refId="ref7602"refString="Hickson, S. J. & Gravely, F. H. (1907) Coelenterata. II. Hydroid zoophytes. National Antarctic Expedition (S. S. Discovery) 1901 - 1904, Natural History, 3, 1 - 34."type="journal article"year="1907">Hickson & Gravely (1907:7)</bibRefCitation>
<bibRefCitationid="EF914B02FFE40D592284FB28354067A3"author="Totton, A. K."box="[386,542,1152,1178]"pageId="6"pageNumber="280"pagination="131 - 252"refId="ref8480"refString="Totton, A. K. (1930) Coelenterata. Part V. Hydroida. Natural History Report, British Antarctic ' Terra Nova' Expedition, 1910, Zoology, 5 (5), 131 - 252, pls 1 - 3."type="journal article"year="1930">Totton (1930)</bibRefCitation>
, “At the base of the hydranth there is a circular groove bounded proximally by a collar of very conspicuous deeply-staining cells. Occasionally both collar and groove are apparently absent”. Subsequently, they added that “the lower margin of the groove was sometimes slightly swollen out to form a collar”, which was also depicted by them in
<figureCitationid="133B2A76FFE40D592131FB4335C8663F"box="[567,662,1259,1286]"captionStart="FIGURE 4"captionStartId="9.[151,250,1896,1920]"captionTargetBox="[232,1353,183,1871]"captionTargetId="figure-27@9.[232,1355,181,1872]"captionTargetPageId="9"captionText="FIGURE 4. Campanularia sp.: A–B, hydrothecae; C, hydrothecal distal part showing cusps; D, distal part of pedicel, basal spherule and hydrothecal basal part. Sertularella contorta Kirchenpauer, 1884: E–F, hydrothecae; G, hydrotheca and basal part of branch; H, hydrotheca showing polyp and location of basal ‘tentacles’ (close-up showing tentacles). Scale bar: 200 µm (A, B, E–H), 100 µm (C, D)."figureDoi="http://doi.org/10.5281/zenodo.6831897"httpUri="https://zenodo.org/record/6831897/files/figure.png"pageId="6"pageNumber="280">Figure 4</figureCitation>
of Plate I. As noted above, in the present material there is usually a basal annular swelling.
<bibRefCitationid="EF914B02FFE40D5923C1FA9B36276677"author="Stechow, E."box="[199,377,1331,1358]"pageId="6"pageNumber="280"pagination="81 - 92"refId="ref8400"refString="Stechow, E. (1932) Neue Hydroiden aus dem Mittelmeer und dem Pazifischen Ozean, nebst Bemerkungen uber einige wenig bekannte Formen. Zoologischer Anzeiger, 100 (3 - 4), 81 - 92."type="journal article"year="1932">Stechow (1932)</bibRefCitation>
<bibRefCitationid="EF914B02FFE40D592267FAD4350A66AF"author="Marques, A. C. & Mergner, H. & Hoinghaus, R. & Santos C. M. D. & Vervoort, W."box="[353,596,1403,1430]"pageId="6"pageNumber="280"pagination="75 - 118"refId="ref7938"refString="Marques, A. C., Mergner, H., Hoinghaus, R., Santos C. M. D. & Vervoort, W. (2000) Morphological study and taxonomical notes on Eudendriidae (Cnidaria: Hydrozoa: Athecatae / Anthomedusae). Zoologische Mededelingen, Leiden, 74 (5), 75 - 118."type="journal article"year="2000">Marques et al. (2000)</bibRefCitation>
because of its similarities with earlier records, particularly those by
<bibRefCitationid="EF914B02FFE40D592260FA4F35C9653B"author="Hickson, S. J. & Gravely, F. H."box="[358,663,1511,1538]"pageId="6"pageNumber="280"pagination="1 - 34"refId="ref7602"refString="Hickson, S. J. & Gravely, F. H. (1907) Coelenterata. II. Hydroid zoophytes. National Antarctic Expedition (S. S. Discovery) 1901 - 1904, Natural History, 3, 1 - 34."type="journal article"year="1907">Hickson & Gravely (1907)</bibRefCitation>
and
<bibRefCitationid="EF914B02FFE40D5921D7FA4F3425653B"author="Millard, N. A. H."box="[721,891,1511,1538]"pageId="6"pageNumber="280"pagination="1 - 47"refId="ref8108"refString="Millard, N. A. H. (1977) Hydroids from the Kerguelen and Crozet shelves, collected by the cruise MD. 03 of the Marion-Dufresne. Annals of the South African Museum, 73 (1), 1 - 47."type="journal article"year="1977">Millard (1977)</bibRefCitation>
, even though the absence of information on the cnidome in previous records makes it uncertain. If confirmed, this record would improve the knowledge of this species by providing information on its cnidome.
<bibRefCitationid="EF914B02FFE40D592235F9DF368765AB"author="Millard, N. A. H."box="[307,473,1655,1682]"pageId="6"pageNumber="280"pagination="1 - 47"refId="ref8108"refString="Millard, N. A. H. (1977) Hydroids from the Kerguelen and Crozet shelves, collected by the cruise MD. 03 of the Marion-Dufresne. Annals of the South African Museum, 73 (1), 1 - 47."type="journal article"year="1977">Millard (1977)</bibRefCitation>
