<documentid="7E0723630776D7FC58CFA1884B82F12F"ID-CLB-Dataset="290747"ID-DOI="10.11646/zootaxa.5424.1.4"ID-GBIF-Dataset="ea7b96c0-e2fa-455e-af7a-bac8873e014b"ID-ISSN="1175-5326"ID-Zenodo-Dep="10808050"ID-ZooBank="3DF7F8AA-BA4C-4C78-BB1E-450537B79CB6"IM.bibliography_approvedBy="felipe"IM.illustrations_approvedBy="juliana"IM.materialsCitations_approvedBy="juliana"IM.metadata_approvedBy="juliana"IM.taxonomicNames_approvedBy="felipe"IM.treatments_approvedBy="juliana"checkinTime="1710236571554"checkinUser="plazi"docAuthor="Mendes, Samuel Lucas Da Silva Delgado, Paiva, Paulo Cesar De & Rizzo, Alexandra E."docDate="2024"docId="03B887F73E026F78F884B1AF07F7FAC6"docLanguage="en"docName="zootaxa.5424.1.4.pdf"docOrigin="Zootaxa 5424 (1)"docSource="http://dx.doi.org/10.11646/zootaxa.5424.1.4"docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article"docStyleId="647186512141C8FC8976D5BCC54AEB7D"docStyleName="Zootaxa.2013-.journal_article"docStyleVersion="9"docTitle="Oligobregma cruzae Mendes & Paiva & Rizzo 2024, sp. nov."docType="treatment"docVersion="6"lastPageNumber="92"masterDocId="FF81FF8F3E056F74F813B770034EFFCB"masterDocTitle="First record of Oligobregma Kudenov & Blake, 1975 (Annelida: Polychaeta: Scalibregmatidae Malmgren, 1867) from Brazil with the description of three new species"masterLastPageNumber="98"masterPageNumber="80"pageNumber="87"updateTime="1732480990998"updateUser="ExternalLinkService"zenodo-license-document="CLOSED">
<mods:titleid="917C82623E21FB1D99A2320D397627ED">First record of Oligobregma Kudenov & Blake, 1975 (Annelida: Polychaeta: Scalibregmatidae Malmgren, 1867) from Brazil with the description of three new species</mods:title>
<mods:affiliationid="261C2646CE948F3B871D9BD4A514A183">Universidade Federal do Rio de Janeiro, Programa de Pós-Graduação em Zoologia, Museu Nacional.</mods:affiliation>
<taxonomicNameid="4C114D623E026F73F884B1AF02C3F931"ID-CoL="C7RNP"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[151,397,1759,1786]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="7"pageNumber="87"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<figureCitationid="132A2A643E026F73F884B058024EF889"box="[151,256,1832,1858]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="7"pageNumber="87">Figures 4</figureCitation>
&
<figureCitationid="132A2A643E026F73F937B058027CF888"box="[292,306,1832,1859]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="7"pageNumber="87">5</figureCitation>
<specimenCodeid="DBB79E9A3E026F73FB11B000006BF841"box="[770,805,1904,1930]"collectionCode="R"country="Chile"name="Departamento de Geologia, Universidad de Chile"pageId="7"pageNumber="87">R2</specimenCode>
<collectingDateid="EFEBE9C93E026F73FCC6B000062BF841"box="[1237,1381,1904,1931]"pageId="7"pageNumber="87"value="2019-06-20">20 Jun 2019</collectingDate>
<specimenCodeid="DBB79E9A3E026F73FAE1B0E4005DF865"box="[754,787,1940,1966]"collectionCode="R"country="Chile"name="Departamento de Geologia, Universidad de Chile"pageId="7"pageNumber="87">R1</specimenCode>
<collectingDateid="EFEBE9C93E026F73FCDCB0E4062CF865"box="[1231,1378,1940,1967]"pageId="7"pageNumber="87"value="2019-06-18">18 Jun 2019</collectingDate>
<taxonomicNameid="4C114D623E0D6F7CF906B07A02ADF8E9"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[277,483,1802,1826]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="8"pageNumber="88"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus.
<taxonomicNameid="4C114D623E0C6F7DF900B0F50292F856"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[275,476,1925,1949]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="9"pageNumber="89"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
Interramal papillae from midbody chaetiger in ventral view. Abbreviations: As = Acicular spine; dC = Dorsal cirrus; iP = Interramal papillae; Ly = Lyrate chaeta; Nel = Neuropodial lobe; Nol = Notopodial Lobe; Pb = Proboscis; Pro = Prostomium; Pgc = Pigidial cirrus; Pg = Pygidium; vC= Ventral cirrus.
</paragraph>
<paragraphid="8BAE36E13E0F6F7EF8D4B61D0789FE60"blockId="10.[151,1437,365,2011]"pageId="10"pageNumber="90">Body arenicoliform, expanded over chaetiger 3–12. Colour in alcohol white to yellowish. Body surface covered by secondarily annulated rings. Secondary annuli smooth in both anterior and posterior regions.</paragraph>
Quadrangular prostomium, with two short, rounded horns, both projected upwards (
<figureCitationid="132A2A643E0F6F7EFC7CB6C50783FE04"box="[1135,1229,437,463]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Figs 4A</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFCCAB6C507B3FE1B"box="[1241,1277,437,464]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5C</figureCitation>
). Eyes absent. Nuchal organs not observed. Peristomium achaetous, uniannulated dorsally and ventrally (
<figureCitationid="132A2A643E0F6F7EFC9EB6A907A5FE38"box="[1165,1259,473,499]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Figs 4A</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFCE4B6A90652FE3F"box="[1271,1308,473,500]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5C</figureCitation>
). Proboscis crenulated (
<figureCitationid="132A2A643E0F6F7EF908B68D0220FDD3"box="[283,366,509,536]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig 5C</figureCitation>
). Ventral groove present from chaetiger 2 (
<figureCitationid="132A2A643E0F6F7EFB5CB68D00E3FDDC"box="[847,941,509,535]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Figs 4A</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFBA9B68D0090FDD3"box="[954,990,509,536]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5C</figureCitation>
). Quadrangular uniannulated pads from chaetiger 2, forming a ventral mid-ridge up to end of body (
<figureCitationid="132A2A643E0F6F7EFB39B55100CDFDF0"box="[810,899,545,571]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Fig. 4A</figureCitation>
). Each pad paired to a single chaetiger. Posterior pads smaller and narrower than anterior ones.
</paragraph>
<paragraphid="8BAE36E13E0F6F7EF8D4B5190799FCD8"blockId="10.[151,1437,365,2011]"pageId="10"pageNumber="90">Dorsally, chaetiger 1–10 present one annulus connected to notopodial lobe, plus one superior and inferior annuli delimitating segment; from chaetiger 10 throughout, two secondary annuli connected to notopodial lobes, plus one superior and inferior annuli delimitating segment. Ventrally, chaetigers 1–3 with one annulus connected to neuropodial lobe, plus one superior and inferior annuli delimitating the segment. From chaetiger 4 throughout, two annuli connected to neuropodial lobe, plus one superior and inferior annuli delimitating segment.</paragraph>
Dorsal and ventral cirri present from chaetiger 14 (
<figureCitationid="132A2A643E0F6F7EFB00B46D0020FCFC"box="[787,878,797,823]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Fig. 4B</figureCitation>
). Interramal papillae present (
<figureCitationid="132A2A643E0F6F7EFCD5B46D066DFCF3"box="[1222,1315,797,824]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5H</figureCitation>
); rounded, in midbody, to “finger-like”, in posterior body, filled with granular content (
<figureCitationid="132A2A643E0F6F7EFC05B431073AFC97"box="[1046,1140,833,860]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5H</figureCitation>
). Dorsal and ventral cirri triangular to lanceolate (
<figureCitationid="132A2A643E0F6F7EF9BCB4150143FCB4"box="[431,525,869,895]"captionStart="FIGURE 1"captionStartId="4.[151,250,1910,1934]"captionTargetBox="[162,1425,190,1874]"captionTargetId="figure-18@4.[151,1436,179,1885]"captionTargetPageId="4"captionText="FIGURE 1. Holotype of Oligobregma nonatoi sp. nov. line drawings. A. Anterior body in ventral view. B. Acicular spine. C. Lyrate chaeta. D. Midbody parapodium in anterior view. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808056"httpUri="https://zenodo.org/record/10808056/files/figure.png"pageId="10"pageNumber="90">Figs 1B</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFA0FB415012FFC4B"box="[540,609,869,896]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5D–E</figureCitation>
), reaching their larger size on midbody chaetigers, becoming thinner on posterior chaetigers. Strong black tubular glands may be present in all cirriferous chaetigers; sparsed and less numerous initially (
<figureCitationid="132A2A643E0F6F7EF960B4DD0287FC03"box="[371,457,941,968]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5E</figureCitation>
), then filling all internal space posteriorly (
<figureCitationid="132A2A643E0F6F7EFBBDB4DD0749FC03"box="[942,1031,941,968]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5D</figureCitation>
Parapodial lobes reduced in anterior chaetigers, becoming evident from midbody to posterior chaetigers (
<figureCitationid="132A2A643E0F6F7EFD79B4A103F5FBC4"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Figs 4B</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EF8DAB4850241FBDB"box="[201,271,1013,1040]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5D–E</figureCitation>
). Notopodial and neuropodial lobes of same length on anterior to midbody chaetigers. From midbody chaetigers, notopodial lobe sometimes reaching a longer length than neuropodial lobe; emerging as a broad basis transitioning to a broad rounded tip; neuropodial lobe asymmetrical, emerging as a thin basis abruptly transitioning to a pointed tip on its dorsal face, forming a “knife-like” structure (
<figureCitationid="132A2A643E0F6F7EFBDDB3110765FBB7"box="[974,1067,1121,1148]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5E</figureCitation>
). On posterior-most chaetigers, notopodial and neuropodial lobes with similar shape and length; both asymmetrical, emerging as a thinner projection transitioning abruptly to a pointed tip (
<figureCitationid="132A2A643E0F6F7EFA47B3D901E1FB08"box="[596,687,1193,1219]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Fig. 4B</figureCitation>
); with transition occurring on ventral side of notopodial lobe and dorsal side of neuropodial lobe, both forming a pointed structure. At end of body, parapodial cirri and lobes reduce their size and become thinner (
<figureCitationid="132A2A643E0F6F7EF9E3B3810104FAC7"box="[496,586,1265,1292]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5D</figureCitation>
Acicular spines present from chaetiger 1–4 on noto and neuropodia (
<figureCitationid="132A2A643E0F6F7EFBF5B26507C3FAE4"box="[998,1165,1301,1327]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Figs 4A, C–D</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFC8FB26507ADFAFB"box="[1180,1251,1301,1328]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5A–B</figureCitation>
). On notopodia, chaetigers 1–2 present two anterior rows of strong curved acicular spines (
<figureCitationid="132A2A643E0F6F7EFBFCB2490703FA98"box="[1007,1101,1337,1363]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Figs 4C</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFC48B24907CEFA9F"box="[1115,1152,1337,1364]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5A</figureCitation>
), plus a posterior row of capillary chaetae; numbering eight spines on anterior row and 7–8 spines on posterior row. Chaetiger 3–4 present one anterior row of eight straight and weaker acicular spines, plus two posterior rows of capillaries (
<figureCitationid="132A2A643E0F6F7EFD13B2F10611FA50"box="[1280,1375,1409,1435]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Figs 4D</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFD78B2F106C1FA57"box="[1387,1423,1409,1436]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5B</figureCitation>
). On neuropodia, chaetiger 1 with two rows of five straight acicular spines, plus a posterior row of capillary chaetae. Chaetigers 2–4 with one row of five straight acicular spines, weaker than chaetiger 1, plus two rows of capillary chaetae. Acicular spines on noto and neuropodia of chaetiger 4 transitional (
<figureCitationid="132A2A643E0F6F7EFBF9B29D070DF9C3"box="[1002,1091,1517,1544]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5B</figureCitation>
Short spinous chaetae absent. Lyrate chaetae present on neuropodia from chaetiger 5 (
<figureCitationid="132A2A643E0F6F7EFC9EB1610793F9E0"box="[1165,1245,1553,1579]"captionStart="FIGURE 4"captionStartId="8.[151,250,1802,1826]"captionTargetBox="[193,1351,241,1637]"captionTargetId="figure-18@8.[186,1401,181,1779]"captionTargetPageId="8"captionText="FIGURE 4. Oligobregma cruzae sp. nov. Paratype line drawings.A. Anteriorbody in dorsal view.B. Posterior bodyparapodium in anterior view. C. Acicular spine from chaetigers 1–2. D. Acicular spine from chaetigers 3–4. E. Lyrate chaeta. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus."figureDoi="http://doi.org/10.5281/zenodo.10808063"httpUri="https://zenodo.org/record/10808063/files/figure.png"pageId="10"pageNumber="90">Fig 4E</figureCitation>
;
<figureCitationid="132A2A643E0F6F7EFCFAB1610640F9E7"box="[1257,1294,1553,1580]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">5G</figureCitation>
), numbering six in each fascicle on anterior chaetigers, reaching
number on posterior chaetigers; always with unequal tynes (tyne’s ratio = 1.2), grouped in a single row anterior to capillaries. Capillaries organized in one row on chaetigers 1–2, then two rows from chaetiger 3 up to posterior chaetigers. Pygidium uniannulated, with a short terminal margin (
<figureCitationid="132A2A643E0F6F7EFAE4B1D10002F977"box="[759,844,1697,1724]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5F</figureCitation>
); terminal margin lobated, with two pairs of pygidial cirri, first pair projected dorso-laterally and following pair projected ventro-laterally. Pygidial cirri long and thin (
<figureCitationid="132A2A643E0F6F7EF88CB19903BBF8CF"box="[159,245,1769,1796]"captionStart="FIGURE 5"captionStartId="9.[151,247,1925,1949]"captionTargetBox="[151,1436,182,1896]"captionTargetId="figure-26@9.[151,1436,181,1901]"captionTargetPageId="9"captionText="FIGURE 5. Oligobregma cruzae sp. nov. Paratype (A-E) and Holotype (F-H) in optical microscopy stained with ShirlastainA. A. Acicular spines on chaetigers 1–3 in detail. B. Acicular spines on chaetigers 2–4 in detail, with transitional spines on chaetiger."figureDoi="http://doi.org/10.5281/zenodo.10808065"httpUri="https://zenodo.org/record/10808065/files/figure.png"pageId="10"pageNumber="90">Fig. 5F</figureCitation>
<taxonomicNameid="4C114D623E0F6F7EF950B07D0165F8EC"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[323,555,1805,1831]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="10"pageNumber="90"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<bibRefCitationid="EF804B103E0F6F7EFC66B07D07B0F8EC"author="Blake, J. A."box="[1141,1278,1805,1831]"pageId="10"pageNumber="90"pagination="271 - 298"refId="ref12725"refString="Blake, J. A. (2023) New species of Scalibregmatidae (Annelida) from slope and abyssal depths off eastern Australia. Records of the Australian Museum, 75 (3), 271 - 298. https: // doi. org / 10.3853 / j. 2201 - 4349.75.2023.1827"type="journal article"year="2023">Blake, 2023</bibRefCitation>
</taxonomicName>
,
<taxonomicNameid="4C114D623E0F6F7EFD1EB07D0008F880"authority="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren, 2019"authorityName="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren"authorityYear="2019"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="10"pageNumber="90"phylum="Annelida"rank="species"species="brasierae">
<bibRefCitationid="EF804B103E0F6F7EFC09B0410786F887"author="Detinova, N. N."box="[1050,1224,1841,1868]"pageId="10"pageNumber="90"pagination="96 - 136"refId="ref12948"refString="Detinova, N. N. (1985) Polychaetous worms from the Reykjanes Ridge (the North Atlantic). Trudy Instituta Okeanologii, 120, 96 - 136."type="journal article"year="1985">Detinova, 1985</bibRefCitation>
</taxonomicName>
,
<taxonomicNameid="4C114D623E0F6F7EFCCBB04102FCF8A4"authority="Schuller & Hilbig, 2007"authorityName="Schuller & Hilbig"authorityYear="2007"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="10"pageNumber="90"phylum="Annelida"rank="species"species="quadrispinosa">
<bibRefCitationid="EF804B103E0F6F7EF884B02502FCF8A4"author="Schuller, M. & Hilbig, B."box="[151,434,1877,1903]"pageId="10"pageNumber="90"pagination="35 - 45"refId="ref14375"refString="Schuller, M. & Hilbig, B. (2007) Three new species of the genus Oligobregma (Polychaeta, Scalibregmatidae) from the Scotia and Weddell Seas (Antarctica). Zootaxa, 1391, 35 - 45. https: // doi. org / 10.11646 / zootaxa. 1391.1.2"type="journal article"year="2007">Schüller & Hilbig, 2007</bibRefCitation>
</taxonomicName>
,
<taxonomicNameid="4C114D623E0F6F7EF9D7B02507AEF8A4"authority="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren, 2019"authorityName="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren"authorityYear="2019"box="[452,1248,1877,1903]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="10"pageNumber="90"phylum="Annelida"rank="species"species="tani">
Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren, 2019
</taxonomicName>
by the presence of acicular spines from chaetigers 1–4 on notopodia, lyrate chaetae with unequal tynes and conspicuous rounded horns on prostomium. However, they differ in other relevant aspects as discussed below.
<taxonomicNameid="4C114D623E0E6F7FF90DB01C02B2F84F"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[286,508,1900,1924]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="11"pageNumber="91"phylum="Annelida"rank="species"species="bakkeni"status="sp. nov.">
Posterior parapodium in anterior view. Abbreviations: dC = Dorsal cirrus; Hor = Prostomial horn; iP = Interramal papilla; NuO = Nuchal organ; Pe = Peristomium; Pro = Prostomium; vC = Ventral cirrus.
<taxonomicNameid="4C114D623E096F78FBCEB7E70705FF7B"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[989,1099,151,177]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FD10B7AF063CFF33"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[1283,1394,223,249]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FD92B673024BFE8A"authorityName="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren"authorityYear="2019"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="brasierae">O. brasierae</taxonomicName>
,
<taxonomicNameid="4C114D623E096F78F900B6570294FE8A"authorityName="Schuller & Hilbig"authorityYear="2007"box="[275,474,295,321]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="quadrispinosa">O. quadrispinosa</taxonomicName>
,
<taxonomicNameid="4C114D623E096F78F9FBB657012DFE8A"authorityName="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren"authorityYear="2019"box="[488,611,295,321]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="whaleyi">O. whaleyi</taxonomicName>
</emphasis>
and
<taxonomicNameid="4C114D623E096F78FA8CB6570040FE8B"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[671,782,295,321]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
presents asymmetrical, “nipple-like” triangular parapodial cirri, terminating in a rounded tip. In contrast,
<taxonomicNameid="4C114D623E096F78F95DB6E302F0FE67"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[334,446,403,429]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FBB7B6C7075CFE1B"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[932,1042,439,465]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FCDCB6AB0672FE3F"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[1231,1340,475,501]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
on parapodial glands, prostomium and parapodial cirri format, this species belongs to a different subgroup within
<taxonomicNameid="4C114D623E096F78F884B5530265FDF6"authorityName="Kudenov & Blake"authorityYear="1975"box="[151,299,547,573]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="genus">
, with species presenting acicular spines only from chaetigers 1–3, whereas
<taxonomicNameid="4C114D623E096F78FC67B55307AEFDF7"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[1140,1248,547,573]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FA65B51B01AFFD4F"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[630,737,619,645]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FB1EB5C30033FD07"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[781,893,691,717]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FCF1B5A7063AFD3A"authorityName="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren"authorityYear="2019"box="[1250,1396,727,753]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="brasierae">O. brasierae</taxonomicName>
,
<taxonomicNameid="4C114D623E096F78FD92B5A70274FCDE"authorityName="Schuller & Hilbig"authorityYear="2007"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="quadrispinosa">O. quadrispinosa</taxonomicName>
,
<taxonomicNameid="4C114D623E096F78F956B58B02D8FCDF"authorityName="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren"authorityYear="2019"box="[325,406,763,789]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="tani">O. tani</taxonomicName>
,
<taxonomicNameid="4C114D623E096F78F9B2B58B0154FCDE"authorityName="Wiklund, Neal, Glover, Drennan, Rabone & Dahlgren"authorityYear="2019"box="[417,538,763,789]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="whaleyi">O. whaleyi</taxonomicName>
</emphasis>
and
<taxonomicNameid="4C114D623E096F78FA42B58B01F0FCDF"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[593,702,763,789]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FA65B46F01AFFCF3"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[630,737,799,825]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FB1EB4170033FC4B"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[781,893,871,897]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
it is possible to highlight some differences in comparison to
<taxonomicNameid="4C114D623E096F78FCD0B4DF067CFC03"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[1219,1330,943,969]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
related to the emergence order of lyrate chaetae and body annulation. In
<taxonomicNameid="4C114D623E096F78FBF9B4A30714FC27"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[1002,1114,979,1005]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
, the lyrate chaetae emerge from chaetiger 5 and the body has one annulus connected to notopodial lobe, plus one superior and inferior annuli delimitating the segment from chaetigers 1–10; whereas in
<taxonomicNameid="4C114D623E096F78F974B313029DFBB7"authority="Mendes & Paiva & Rizzo, 2024"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[359,467,1123,1149]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae"status="sp. nov.">
<taxonomicNameid="4C114D623E096F78FA23B3DB01C3FB0E"authorityName="Mendes & Paiva & Rizzo"authorityYear="2024"box="[560,653,1195,1221]"class="Polychaeta"family="Scalibregmatidae"genus="Oligobregma"kingdom="Animalia"pageId="12"pageNumber="92"phylum="Annelida"rank="species"species="cruzae">
was chosen to honor the arachnologist Dr.Amanda Cruz Mendes from
<collectingRegionid="49D5F8033E096F78F884B3BF023BFB22"box="[151,373,1231,1257]"country="Brazil"name="Rio de Janeiro"pageId="12"pageNumber="92">Rio de Janeiro State</collectingRegion>
