<documentid="F603B31652A1CE449F76B93D1E27DF8A"ID-DOI="10.26028/cybium/2014-383-005"ID-ISSN="2101-0315"ID-Zenodo-Dep="13617926"IM.bibliography_approvedBy="felipe"IM.illustrations_approvedBy="felipe"IM.materialsCitations_approvedBy="felipe"IM.metadata_approvedBy="guilherme"IM.tables_requiresApprovalFor="GgImagineBatch"IM.taxonomicNames_approvedBy="felipe"IM.treatments_approvedBy="guilherme"checkinTime="1723048008036"checkinUser="felipe"docAuthor="Meunier, François J., Jégu, Michel & Keith, Philippe"docDate="2014"docId="038D534ACE475647FF7D682EFA37F8B9"docLanguage="en"docName="Cybium.38.3.223-230.pdf"docOrigin="Cybium 38 (3)"docSource="http://dx.doi.org/10.26028/cybium/2014-383-005"docStyle="DocumentStyle:73DAD84611431DC6606F8B63B2C6039C.1:Cybium.2013-2018.journal_article.type1"docStyleId="73DAD84611431DC6606F8B63B2C6039C"docStyleName="Cybium.2013-2018.journal_article.type1"docStyleVersion="1"docTitle="Distocyclus guchereauae Meunier, Jégu & Keith, 2014, new species"docType="treatment"docVersion="4"lastPageNumber="224"masterDocId="FFB42B32CE465646FF886974FFBCFFCA"masterDocTitle="Distocyclus guchereauae a new species of Neotropical electric fish, (Gymnotiformes: Sternopygidae), from French Guiana"masterLastPageNumber="230"masterPageNumber="223"pageNumber="224"updateTime="1725026819987"updateUser="ExternalLinkService"zenodo-license-document="CC-BY-4.0">
<mods:titleid="FC056E4DC63729E3A2C2CAF8072B5E9F">Distocyclus guchereauae a new species of Neotropical electric fish, (Gymnotiformes: Sternopygidae), from French Guiana</mods:title>
<taxonomicNameid="4C2499DFCE475647FF7D682EFDBBFEB8"ID-CoL="36Y2L"authorityName="Meunier & Jégu & Keith"authorityYear="2014"box="[245,519,346,370]"family="Sternopygidae"genus="Distocyclus"kingdom="Animalia"order="Gymnotiformes"pageId="1"pageNumber="224"phylum="Chordata"rank="species"species="guchereauae"status="sp. nov.">
<figureCitationid="131FFED9CE475647FE2E6808FE09FE5E"box="[422,437,380,404]"captionStart="Figure 2"captionStartId="2.[1077,1143,935,957]"captionTargetBox="[132,1039,785,1119]"captionTargetId="figure-52@2.[132,1039,785,1119]"captionTargetPageId="2"captionText="Figure 2. - Distocyclus guchereauae. Paratypes X-ray. A: MNHN 2003- 0014; B: MNHN 2003-0013. Detail of the posterior abdominal region showing respectively three and four rib-like bones (arrowheads). The arrow points to the first hemal spine. Scale bars = 10 mm."figureDoi="http://doi.org/10.5281/zenodo.13617930"httpUri="https://zenodo.org/record/13617930/files/figure.png"pageId="1"pageNumber="224">2</figureCitation>
<figureCitationid="131FFED9CE475647FE486808FE73FE5E"box="[448,463,380,404]"captionStart="Figure 3"captionStartId="2.[1077,1143,1554,1576]"captionTargetBox="[134,1041,1172,1835]"captionTargetId="figure-103@2.[134,1041,1172,1835]"captionTargetPageId="2"captionText="Figure 3. - Distocyclus guchereauae. Paratypes X-ray (MNHN 2003-0018). Upper specimen normal (331 mm TL); lower specimen regenerated (322 mm TL). In the regenerated tail, an ossified rod developed from the 65th vertebra and replaced caudal vertebrae; the regenerated anal rays stopped at the anterior part of the rod. Arrows point to the end of the anal fin; arrowheads point to the articulation of the bony rod with the last true vertebrae."figureDoi="http://doi.org/10.5281/zenodo.13617932"httpUri="https://zenodo.org/record/13617932/files/figure.png"pageId="1"pageNumber="224">3</figureCitation>
<tableCitationid="C6A6D7E7CE475647FE52680FFDA7FE59"box="[474,539,379,403]"captionStart="Table I"captionStartId="3.[132,185,217,239]"captionText="Table I. - Measurements (in mm) with their abbreviations and meristic data for type series of Distocyclus guchereauae: holotype and five paratypes. Two specimens show regenerative process of the caudal part (*) and two others have damaged caudal part of the body (**)."pageId="1"pageNumber="224">Tabs I</tableCitation>
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<bibRefCitationid="EFB59FADCE475647FB9468ABFAF3FE3D"author="TAYLOR W. R. & VAN DYKE G. C."box="[1052,1359,479,503]"pageId="1"pageNumber="224"pagination="107 - 119"refId="ref7047"refString="TAYLOR W. R. & VAN DYKE G. C., 1985. - Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study. Cybium, 9 (2): 107 - 119."type="journal article"year="1985">Taylor and Van Dyke, 1985</bibRefCitation>
In preserved specimens, the new species is characterized by a grey colour with several longitudinal lightly dark lines, the lowest being regularly striped (
); 13-14 precaudal vertebrae; 184-187 anal fin rays in the undamaged specimens (see below “regeneration of the caudal skeleton”); a triangular head with a snout short (less than one third of the head length), a terminal mouth and the anus located straight below the eyes.
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and
<specimenCodeid="DB824A27CE475647FA9A6A9DFCDBFBEB"collectionCode="MNHN"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="1"pageNumber="224">MNHN 2003- 0013</specimenCode>
, was cut, so several morphometric and meristic data are lacking
Anal rays 184 (184-187); pectoral rays ii16 (ii16-19); 13 (13-14) precaudal vertebrae and a total number of 79 (56-84) vertebrae; three or four rib-like bones [
<bibRefCitationid="EFB59FADCE475647FA906DF8FBB7FB0F"author="LUNDBERG J. G. & MAGO-LECCIA F."pageId="1"pageNumber="224"pagination="53 - 85"refId="ref6711"refString="LUNDBERG J. G. & MAGO-LECCIA F., 1986. - A review of Rhabdolichops (Gymnotiformes, Sternopygidae), a genus of South American freshwater fishes, with descriptions of four new species. Proc. Acad. Nat. Sci. Philad., 138: 53 - 85."type="journal article"year="1986">Lundberg and Mago-Leccia (1986)</bibRefCitation>
<bibRefCitationid="EFB59FADCE475647FAB36DD9FBB2FB2C"author="DE LA HOZ E. & CHARDON M."pageId="1"pageNumber="224"pagination="9 - 53"refId="ref6247"refString="DE LA HOZ E. & CHARDON M., 1984. - Skeleton, muscles, ligaments and swimblader of a gymnotid fish, Sternopygus macrurus Bloch & Schneider (Ostariophysi, Gymnotoidei). Bull. Soc. R. Sci. Liege, 53 (1): 9 - 53."type="journal article"year="1984">De La Hoz and Chardon (1984)</bibRefCitation>
<figureCitationid="131FFED9CE475647FBAC6DB9FBD5FB2C"box="[1060,1129,1229,1254]"captionStart="Figure 2"captionStartId="2.[1077,1143,935,957]"captionTargetBox="[132,1039,785,1119]"captionTargetId="figure-52@2.[132,1039,785,1119]"captionTargetPageId="2"captionText="Figure 2. - Distocyclus guchereauae. Paratypes X-ray. A: MNHN 2003- 0014; B: MNHN 2003-0013. Detail of the posterior abdominal region showing respectively three and four rib-like bones (arrowheads). The arrow points to the first hemal spine. Scale bars = 10 mm."figureDoi="http://doi.org/10.5281/zenodo.13617930"httpUri="https://zenodo.org/record/13617930/files/figure.png"pageId="1"pageNumber="224">Fig. 2</figureCitation>
, the variability of total number of anal fin rays and vertebrae results from regenerative peculiarities of the caudal part after accidental or predatory wound (see below). On undamaged specimens, the caudal appendage is flattened. The body is totally covered with cycloid scales.
<paragraphid="8B9BE25CCE475647FCDB6CE6FA37F8B9"blockId="1.[813,1456,935,1907]"pageId="1"pageNumber="224">Mouth terminal and snout short at the tip of a triangular head. Body and tail compressed; head length 6,6-7,2% (H/T) of length to anal fin; greatest body depth 5% (H/G) of length to anal fin and about 7-8.5% (B/G) of total length; head depth at nape 1.3-1.6% (C/S) and at eyes 1.7-2.1% (C/R) of its length; snout length 2.3-3% (C/K), interocular distance 4.5-6% (C/M) and postorbital distance 1.5-1.7% (C/N) of head length; distance from eye to posterior nare 4.8-7.3%(C/P), internarinal distance 8-12.1% (C/O) and distance from tip of snout to posterior nare 4.4-5.6% (C/Q) of head length; eye diameter 6.1-8.7% (C/L) of head length; mouth small, its gape 3.3-6.6% (C/U) of head length; snout short 2.4-3% (C/K) of head length and mouth terminal; anus located straight below the eyes; gill opening 2.4-3.3% (C/V) of head length; origin of anal fin behind pectoral fin base.</paragraph>