137 lines
19 KiB
XML
137 lines
19 KiB
XML
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<mods:title id="D6649F0BD11FCB017C129CFA8D3F06A2">Anatomical investigation of the slender catshark Schroederichthys tenuis Springer, 1966, with notes on intrageneric relationships (Chondrichthyes: Carcharhiniformes: Scyliorhinidae).</mods:title>
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<mods:namePart id="55D12D1FC72BD97C52FD31AF6BC1FAD7">Ulisses L. Gomes</mods:namePart>
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<mods:namePart id="F6016121DC84227656EC799CF11189BB">Gerhard O. Peters</mods:namePart>
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<mods:namePart id="712875AD864BB6BBC95FB2509F9D63F5">Marcelo R. de Carvalho</mods:namePart>
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<mods:namePart id="992AA20A2F24524B4B0AF48698BB49BA">Otto B. F. Gadig</mods:namePart>
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<mods:date id="D322739B35A41514E913FF5CD9F2CC8F">2006</mods:date>
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<treatment id="81F503A4E73952A5C9226553042172CE" ID-DOI="http://doi.org/10.5281/zenodo.6491969" ID-GBIF-Taxon="100118892" ID-Zenodo-Dep="6491969" LSID="urn:lsid:plazi:treatment:81F503A4E73952A5C9226553042172CE" httpUri="http://treatment.plazi.org/id/81F503A4E73952A5C9226553042172CE" lastPageNumber="30" pageNumber="29">
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<subSubSection id="565BE0AD25A2295376E69B0C75EFA66F" type="nomenclature">
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<paragraph id="2AFFAFF5B0CD323E7132BEE2FEFAD2FB" pageNumber="29">
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[[ Genus
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<taxonomicName id="010BF51213C6941A62053CCC2D3F0445" ID-CoL="7DWG" ID-ENA="458608" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="29" phylum="Chordata" rank="genus">Schroederichthys Springer</taxonomicName>
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]]
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</paragraph>
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</subSubSection>
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<subSubSection id="4CCE3EC66CC4777D2E3E0D873AE139F5" type="discussion">
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<paragraph id="7491A60D0EC0276C08C8EBFDFEA30A0D" lastPageNumber="30" pageNumber="29">
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Sharks of the genus
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<taxonomicName id="F7476B23F41DBB26D40AF3203C043F34" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="29" phylum="Chordata" rank="genus">Schroederichthys</taxonomicName>
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Springer, 1966 are small to medium-sized catsharks (Scyliorhinidae) restricted to temperate and tropical waters of South and Central America, occurring on the continental shelf and upper slope (Compagno, 1984, 1988). The genus
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<pageStartToken id="D80B15716F65FE1E0EB4A9395FDCC79E" pageNumber="30">was</pageStartToken>
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described for
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<taxonomicName id="2B75BB7CC71E8B25C8DDBDADF6A289C0" LSID-ZBK="urn:lsid:zoobank.org:act:54025EAF-3E9B-4758-A724-D22B3473A250" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys maculatus Springer 1966:605" order="Carcharhiniformes" pageNumber="29" phylum="Chordata" rank="species" species="maculatus">Schroederichthys maculatus</taxonomicName>
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(type-species) and
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<taxonomicName id="E3C657C2A9AE4FD35E78FE326936F3A5" LSID-ZBK="urn:lsid:zoobank.org:act:AFCB7B64-B143-4D32-B9A8-BAC12616D7BA" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys tenuis Springer 1966:606" order="Carcharhiniformes" pageNumber="29" phylum="Chordata" rank="species" species="tenuis">S. tenuis</taxonomicName>
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, two small and strongly attenuated species that differed from other scyliorhinids in having a greatly elongated postpelvic trunk region and well developed upper and lower labial folds (Springer, 1966). Adults of
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<taxonomicName id="38DF4F89A653ED16F41A487BCD4459FF" LSID-ZBK="urn:lsid:zoobank.org:act:54025EAF-3E9B-4758-A724-D22B3473A250" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys maculatus Springer 1966:605" order="Carcharhiniformes" pageNumber="29" phylum="Chordata" rank="species" species="maculatus">S. maculatus</taxonomicName>
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were abundant but unknown for
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<taxonomicName id="491990A51834AA04F3117D5AD6427BEE" LSID-ZBK="urn:lsid:zoobank.org:act:AFCB7B64-B143-4D32-B9A8-BAC12616D7BA" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys tenuis Springer 1966:606" order="Carcharhiniformes" pageNumber="29" phylum="Chordata" rank="species" species="tenuis">S. tenuis</taxonomicName>
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, for which only two specimens existed for almost 20 years since its original description and Springer’s (1979) subsequent review of the Scyliorhinidae. A third specimen, an immature male 260 mm in total length, was finally collected off Suriname in waters 72 m deep (Uyeno and Sasaki, 1983). Springer’s original specimens measured 230 and 180 mm total length (holotype and paratype, respectively) and were also immature males, captured off the mouth of the Amazon River in 410 m (Springer, 1966).
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</paragraph>
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<paragraph id="CFE3EB343082EDD101D9BA4E33F5C079" pageNumber="30">
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Springer (1979) expanded
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<taxonomicName id="0F418C480CAC760835DB5E8FEB9402B4" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Schroederichthys</taxonomicName>
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to include the South American
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<taxonomicName id="4913BE8805A9BDF17B84A088787D01A7" LSID-ZBK="urn:lsid:zoobank.org:act:F2B295D7-EC92-4146-BB77-5C6CA800595E" class="Elasmobranchii" family="Scyliorhinidae" genus="Scyllium" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Scyllium bivium Müller, Henle & Smith 1838:8" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="bivium">Scyllium bivium</taxonomicName>
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Smith, 1838 and
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<taxonomicName id="653A55CAA55A4C2471B1B8C5C179C8E1" LSID-ZBK="urn:lsid:zoobank.org:act:6AE0B93A-7DBC-4707-AB53-30662B55E75A" class="Elasmobranchii" family="Scyliorhinidae" genus="Scyllium" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Scyllium chilense Guichenot 1848:362" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="chilense">Scyllium chilense</taxonomicName>
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Guichenot, 1848, two species that were previously assigned to either
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<taxonomicName id="A18B6A96EEF7DB61356EE7582F9CA6BC" LSID-ZBK="urn:lsid:zoobank.org:act:988808BE-9E52-4801-9D39-3E96E74B2FDE" class="Elasmobranchii" family="Scyliorhinidae" genus="Scyliorhinus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Scyliorhinus Squalis Blainville 1816:121" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Scyliorhinus</taxonomicName>
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Blainville, 1816 (Regan, 1908; Norman, 1937) or the Indo-Pacific genus
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<taxonomicName id="68974AA8E795938DDB06D8AE73B18560" LSID-ZBK="urn:lsid:zoobank.org:act:EF8B4C66-B5D8-494A-A976-671A4547EB5E" class="Elasmobranchii" family="Scyliorhinidae" genus="Halaelurus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Halaelurus Gill 1862:407" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Halaelurus</taxonomicName>
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Gill, 1862 (Garman, 1913; Springer, 1966; Kato et al., 1967; Gosztonyi, 1973; Menni et al., 1979). Springer’s (1979) reallocation of these species was based on the observation that newly hatched individuals of
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<taxonomicName id="AC4CC35F8BC5C7E7916E2EDEC743BB6E" class="Elasmobranchii" family="Scyliorhinidae" genus="Halaelurus" higherTaxonomySource="CoL" kingdom="Animalia" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="bivius">Halaelurus bivius</taxonomicName>
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were as attenuated as both species of
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<taxonomicName id="615F2B259F3AEF77ACFC3465B62EA966" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Schroederichthys</taxonomicName>
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. In addition, Springer was informed that an unreported adult specimen of
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<taxonomicName id="F897CEC30391CCA81679FD5BBDCFB8C1" LSID-ZBK="urn:lsid:zoobank.org:act:AFCB7B64-B143-4D32-B9A8-BAC12616D7BA" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys tenuis Springer 1966:606" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="tenuis">Schroederichthys tenuis</taxonomicName>
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from southeastern Brazil in the ISH collection in Hamburg differed from adult
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<taxonomicName id="F2E4A7B58326F91FDB817C1A4EC691B9" LSID-ZBK="urn:lsid:zoobank.org:act:54025EAF-3E9B-4758-A724-D22B3473A250" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys maculatus Springer 1966:605" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="maculatus">S. maculatus</taxonomicName>
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in not being attenuated (pers. comm. from the late G Krefft; Springer, 1979), which further corroborated the assignment of
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<taxonomicName id="ED4880663CF94ABADD3D4E57FE429CCE" class="Elasmobranchii" family="Scyliorhinidae" genus="Halaelurus" higherTaxonomySource="CoL" kingdom="Animalia" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="bivius">H. bivius</taxonomicName>
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and
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<taxonomicName id="C19FEB681EB3C6D2DA6947B7F3F424F9" class="Elasmobranchii" family="Scyliorhinidae" genus="Halaelurus" higherTaxonomySource="CoL" kingdom="Animalia" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="chilensis">H. chilensis</taxonomicName>
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to
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<taxonomicName id="992DB29C19B318A651B8FECDE17EAF93" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Schroederichthys</taxonomicName>
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, and led Compagno (1984) to deduce that the tapered adult body of
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<taxonomicName id="0E0BA3500033BFFDF985E191108E5EF1" LSID-ZBK="urn:lsid:zoobank.org:act:54025EAF-3E9B-4758-A724-D22B3473A250" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys maculatus Springer 1966:605" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="maculatus">S. maculatus</taxonomicName>
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was neotenic. The ISH/Hamburg
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<taxonomicName id="B862DC5137876CFAC9D89652547C74B7" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Schroederichthys</taxonomicName>
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specimen was examined by one of us (MRC) in 1996 and identified as a new species of
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<taxonomicName id="C47C02EFAC653E2DD5C1AE0CEC8348D9" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Schroederichthys</taxonomicName>
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, which is now referred to
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<taxonomicName id="6EAA03F8B64BD5CB710CED43A38B4A57" LSID-ZBK="urn:lsid:zoobank.org:act:336F614A-6BE2-4E8D-9BFB-E5FD414B87D2" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys saurisqualus Soto 2001:38" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="saurisqualus">S. saurisqualus</taxonomicName>
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Soto, 2003 [1].
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</paragraph>
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<paragraph id="81FC45A1D6F37B245F3CB047BA8EDEA6" pageNumber="30">
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New specimens of
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<taxonomicName id="36CC6F6F82DCBD4608E72FEE6A8634D0" LSID-ZBK="urn:lsid:zoobank.org:act:AFCB7B64-B143-4D32-B9A8-BAC12616D7BA" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys tenuis Springer 1966:606" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="tenuis">S. tenuis</taxonomicName>
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appeared only in 1991 when one male and two females were collected from off the coast of
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<normalizedToken id="0E212D035FEB4BDCF461ABC70AF9614E" originalValue="Amapá">Amapa</normalizedToken>
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State (northern Brazil) at 450 m (Gomes and de Carvalho, 1995; Gadig et al., 1996; Gadig, 2001). These specimens contained in their stomachs small teleosts and benthic invertebrates, and represented the first adult specimens of
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<taxonomicName id="86E690EDA717FB36FEB5BEBA2A105789" LSID-ZBK="urn:lsid:zoobank.org:act:AFCB7B64-B143-4D32-B9A8-BAC12616D7BA" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys tenuis Springer 1966:606" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="tenuis">S. tenuis</taxonomicName>
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. One of the females was pregnant and contained a single egg capsule in each uterus (Gomes and de Carvalho, 1995). More importantly, these adults have highly tapered bodies and are as attenuated as juveniles of
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<taxonomicName id="C9EEFC609637289212016320234E961A" LSID-ZBK="urn:lsid:zoobank.org:act:AFCB7B64-B143-4D32-B9A8-BAC12616D7BA" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys tenuis Springer 1966:606" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="tenuis">S. tenuis</taxonomicName>
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and juveniles and adults of
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<taxonomicName id="A9D1B0EA1ED4F38E56156B5101CC9ABA" LSID-ZBK="urn:lsid:zoobank.org:act:54025EAF-3E9B-4758-A724-D22B3473A250" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys maculatus Springer 1966:605" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="maculatus">S. maculatus</taxonomicName>
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.
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</paragraph>
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<paragraph id="93A371173F1C01D3187273A0BB1872E7" lastPageNumber="31" pageNumber="30">
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The present study reports nine additional specimens of
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<taxonomicName id="4D72D50AB1E0C1F5E89692CE0F9AFE3B" LSID-ZBK="urn:lsid:zoobank.org:act:AFCB7B64-B143-4D32-B9A8-BAC12616D7BA" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys tenuis Springer 1966:606" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="species" species="tenuis">S. tenuis</taxonomicName>
|
||
from off
|
||
<normalizedToken id="9FA2380BE2AE6283A5A14DF69D99B778" originalValue="Pará">Para</normalizedToken>
|
||
State,
|
||
<pageStartToken id="4618640852F7F24F7A4C94E2F3CE194A" pageNumber="31">northern</pageStartToken>
|
||
Brazil, caught during exploratory fisheries surveys of its continental slope by the Brazilian Federal REVIZEE program. Our objectives here are to describe and illustrate the skeleton and other morphological features of this rare species, based on mature and immature individuals, and compare them with congeners. Some comments on species relationships within
|
||
<taxonomicName id="C63F6009DD4F5EE70433CBE0B087F3BA" LSID-ZBK="urn:lsid:zoobank.org:act:3A67FA5B-F2BB-46CC-AC5F-03FB52D75F76" class="Elasmobranchii" family="Scyliorhinidae" genus="Schroederichthys" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Schroederichthys Springer 1966:604" order="Carcharhiniformes" pageNumber="30" phylum="Chordata" rank="genus">Schroederichthys</taxonomicName>
|
||
are also provided, anticipating results of work still in progress (de Carvalho and Gomes, in prep.).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |