257 lines
34 KiB
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257 lines
34 KiB
XML
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<mods:title id="AA7AFF14715E0B0E77863586EAC225F0">Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities</mods:title>
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<mods:namePart id="2A3A58612EF3E3BA7FE47868D40E6088">Kröger, Björn</mods:namePart>
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<mods:affiliation id="68AF5208804A75A83DCF59149D914B47">Finnish Museum of Natural History, University of Helsinki, PO Box 44, FI- 00014 Helsinki, Finland.</mods:affiliation>
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<mods:nameIdentifier id="24C0724BEFCA832F93A3735FB3C0EEF8" type="email">bjorn.kroger@helsinki.fi</mods:nameIdentifier>
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<mods:namePart id="447E23059BC252E7C8154F91F441D138">Pohle, Alexander</mods:namePart>
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<mods:affiliation id="FE3FD4430A3D9AB7CDCF41B2929D27A0">Paläontologisches Institut und Museum, University of Zurich, Zurich, Switzerland.</mods:affiliation>
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<mods:nameIdentifier id="28A152D3C7B67BB35EE7064433574A32" type="email">alexander.pohle@pim.uzh.ch</mods:nameIdentifier>
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<mods:title id="979C2E877FB15AC82F7D5E70CBF797FA">European Journal of Taxonomy</mods:title>
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<mods:part id="FBEC35DD70A03EC85BFEA39694F05EB9">
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<mods:date id="0D7A990ABBB223025F21BDB3EF1E5DD0">2021</mods:date>
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<treatment id="5F4487ACFFB3FF8EFD977E79FC937E6D" ID-DOI="http://doi.org/10.5281/zenodo.5793504" ID-GBIF-Taxon="191693631" ID-Zenodo-Dep="5793504" LSID="urn:lsid:plazi:treatment:5F4487ACFFB3FF8EFD977E79FC937E6D" httpUri="http://treatment.plazi.org/id/5F4487ACFFB3FF8EFD977E79FC937E6D" lastPageId="32" lastPageNumber="33" pageId="31" pageNumber="32">
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<subSubSection id="9FF76531FFB3FFB1FD977E79FC2D7BEC" box="[577,1011,365,392]" pageId="31" pageNumber="32" type="nomenclature">
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<paragraph id="D75236BAFFB3FFB1FD977E79FC2D7BEC" blockId="31.[373,1214,365,463]" box="[577,1011,365,392]" pageId="31" pageNumber="32">
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<heading id="8C1A81D6FFB3FFB1FD977E79FC2D7BEC" box="[577,1011,365,392]" centered="true" fontSize="11" level="2" pageId="31" pageNumber="32" reason="2">
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<taxonomicName id="10ED4D39FFB3FFB1FD977E79FCE57BEC" authority="Kröger & Pohle, 2021" authorityName="Kröger & Pohle" authorityYear="2021" box="[577,827,365,392]" class="Cephalopoda" family="Rioceratidae" genus="Svalbardocreas" higherTaxonomySource="GBIF" kingdom="Animalia" order="Tetrabranchia" pageId="31" pageNumber="32" phylum="Mollusca" rank="species" species="skua" status="gen. et sp. nov.">
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<emphasis id="E599EAA8FFB3FFB1FD977E79FCE57BEC" bold="true" box="[577,827,365,392]" italics="true" pageId="31" pageNumber="32">Svalbardocreas skua</emphasis>
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<taxonomicNameLabel id="FEAA57D3FFB3FFB1FC957E7AFC2D7BEC" box="[835,1011,366,392]" pageId="31" pageNumber="32" rank="species">gen. et sp. nov.</taxonomicNameLabel>
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urn:lsid:zoobank.org:act:
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<uuid id="A34B0C6FFFB3FFB1FD407E85FB607BC8" box="[662,1214,401,428]" pageId="31" pageNumber="32">9385D872-8656-4B53-9CA8-05F7575BEB6F</uuid>
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</uri>
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<paragraph id="D75236BAFFB3FFB1FDF37EA0FBD07BAB" blockId="31.[373,1214,365,463]" box="[549,1038,436,463]" pageId="31" pageNumber="32">
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<figureCitation id="4FD62A3FFFB3FFB1FDF37EA0FD4C7BAA" box="[549,658,436,462]" captionStart="Fig" captionStartId="26.[189,232,1780,1806]" captionTargetBox="[197,1386,1251,1742]" captionTargetId="figure-241@26.[189,1398,1251,1742]" captionTargetPageId="26" captionText="Fig. 16. Reconstruction and interpretation of details of connecting ring and septal necks in rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30406, see Fig. 15B.B. Svalbardoceras skua gen. et sp. nov., FMNH-P30274, see Fig. 23F. C–D. Svalbardoceras sterna gen. et. sp. nov., note variability of septal neck shape, which is interpreted as an effect of poor preservation. C. Specimen, FMNH-P30368, see Fig. 23G. D. Specimen, FMNH-P30371, see Fig. 23E. Black: septal neck and septum. Dark grey: connecting ring. Without scale." figureDoi="http://doi.org/10.5281/zenodo.5793472" httpUri="https://zenodo.org/record/5793472/files/figure.png" pageId="31" pageNumber="32">Figs 16B</figureCitation>
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,
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<figureCitation id="4FD62A3FFFB3FFB1FD487EA0FD0F7BAA" box="[670,721,436,462]" captionStart="Fig" captionStartId="30.[188,231,1780,1806]" captionTargetBox="[189,1362,1400,1742]" captionTargetId="figure-388@30.[189,1398,1400,1742]" captionTargetPageId="30" captionText="Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.5793478" httpUri="https://zenodo.org/record/5793478/files/figure.png" pageId="31" pageNumber="32">19C</figureCitation>
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,
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<figureCitation id="4FD62A3FFFB3FFB1FD087EA0FCF77BAA" box="[734,809,436,462]" captionStart-0="Fig" captionStart-1="Fig" captionStartId-0="31.[189,232,1913,1939]" captionStartId-1="32.[189,232,1914,1940]" captionTargetBox-0="[207,1390,1547,1866]" captionTargetBox-1="[206,1392,1493,1866]" captionTargetId-0="figure-225@31.[189,1398,1534,1874]" captionTargetId-1="figure-314@32.[189,1398,1460,1876]" captionTargetPageId-0="31" captionTargetPageId-1="32" captionText-0="Fig. 20.Diagrams of relative conch width and angles of expansion of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements." captionText-1="Fig. 21. Diagrams of relative chamber length and relative siphuncular diameter of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements." figureDoi-0="http://doi.org/10.5281/zenodo.5793480" figureDoi-1="http://doi.org/10.5281/zenodo.5793484" httpUri-0="https://zenodo.org/record/5793480/files/figure.png" httpUri-1="https://zenodo.org/record/5793484/files/figure.png" pageId="31" pageNumber="32">20–21</figureCitation>
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,
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<figureCitation id="4FD62A3FFFB3FFB1FCE07EA0FC517BAA" box="[822,911,436,462]" captionStart="Fig" captionStartId="33.[189,232,1680,1706]" captionTargetBox="[192,1394,870,1626]" captionTargetId="figure-90@33.[189,1398,870,1643]" captionTargetPageId="33" captionText="Fig. 22. Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–D. Svalbardoceras skua gen. et sp. nov. from bed PO 123.3. A. Specimen FMNH-P30277, lateral view, venter, prosiphuncular side toward the right. B. Specimen FMNH-P30272, holotype, lateral view, venter, prosiphuncular side toward the left. C. Specimen FMNH-P30276, lateral view of adult (?), body chamber, with venter, prosiphuncular side toward the left. D. Specimen FMNH-P30263, lateral view of a fragmentary body chamber, with venter, prosiphuncular side toward the left. E–G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. E. Specimen FMNH-P30379. F. Specimen FMNH-P30373, lateral view with venter, prosiphuncular side toward the right. G. Specimen FMNH-P30368, holotype, lateral view with venter, prosiphuncular side toward the right. Scale bar = 10 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.5793488" httpUri="https://zenodo.org/record/5793488/files/figure.png" pageId="31" pageNumber="32">22A–D</figureCitation>
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,
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<figureCitation id="4FD62A3FFFB3FFB1FC4D7EA0FBD07BAB" box="[923,1038,436,463]" captionStart="Fig" captionStartId="34.[188,231,1816,1842]" captionTargetBox="[189,1395,566,1776]" captionTargetId="figure-102@34.[189,1398,566,1776]" captionTargetPageId="34" captionText="Fig. 23. Median sections of phragmocones of Svalbardoceras gen. nov., from Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A, C, E, G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. A, E. Specimen FMNH-P30371. B, D, F. Svalbardoceras skua gen. et sp. nov., from bed PO 123.3. B. Specimen FMNH-P30275. C, G. Specimen FMNH-P30368, holotype. D, F. Specimen FMNH-P30471, oblique sagittal section through siphuncle, distance from conch margin is cutting effect. Scale bars: A–D = 5 mm; E–G = 1 mm." figureDoi="http://doi.org/10.5281/zenodo.5793492" httpUri="https://zenodo.org/record/5793492/files/figure.png" pageId="31" pageNumber="32">23B, D, F</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="9FF76531FFB3FFB1FF6B7EE1FD07788B" pageId="31" pageNumber="32" type="diagnosis">
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<paragraph id="D75236BAFFB3FFB1FF6B7EE1FEE8786B" blockId="31.[189,310,501,527]" box="[189,310,501,527]" pageId="31" pageNumber="32">
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<heading id="8C1A81D6FFB3FFB1FF6B7EE1FEE8786B" bold="true" box="[189,310,501,527]" fontSize="11" level="3" pageId="31" pageNumber="32" reason="3">
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<emphasis id="E599EAA8FFB3FFB1FF6B7EE1FEE8786B" bold="true" box="[189,310,501,527]" pageId="31" pageNumber="32">Diagnosis</emphasis>
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</heading>
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</paragraph>
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<paragraph id="D75236BAFFB3FFB1FF6B7D30FD07788B" blockId="31.[188,1399,548,751]" pageId="31" pageNumber="32">Slightly curved longicones with circular conch cross section; shell ornamented with shallow, irregularly spaced undulations that are more pronounced in later growth stages and with fine, irregularly spaced, directly transverse growth lines or bands; thin, nearly marginal siphuncle with relative siphuncle diameter of ca 0.16 of corresponding conch cross section, siphuncle positioned at concave side of conch curvature; septal necks orthochoanitic; connecting ring relatively thick with slightly concave segments, weak hyposeptal and episeptal deposits occur.</paragraph>
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</subSubSection>
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<subSubSection id="9FF76531FFB3FFB1FF6B7C02FD7E79E5" pageId="31" pageNumber="32" type="etymology">
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<paragraph id="D75236BAFFB3FFB1FF6B7C02FE9A7954" blockId="31.[189,324,790,816]" box="[189,324,790,816]" pageId="31" pageNumber="32">
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<heading id="8C1A81D6FFB3FFB1FF6B7C02FE9A7954" bold="true" box="[189,324,790,816]" fontSize="11" level="3" pageId="31" pageNumber="32" reason="3">
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<emphasis id="E599EAA8FFB3FFB1FF6B7C02FE9A7954" bold="true" box="[189,324,790,816]" pageId="31" pageNumber="32">Etymology</emphasis>
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</heading>
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</paragraph>
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<paragraph id="D75236BAFFB3FFB1FF6B7C50FD7E79E5" blockId="31.[189,1398,836,898]" pageId="31" pageNumber="32">
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Referring to
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<taxonomicName id="10ED4D39FFB3FFB1FE8F7C50FCDF793B" authority="(Brunnich, 1764)" baseAuthorityName="Brunnich" baseAuthorityYear="1764" box="[345,769,836,863]" class="Aves" family="Stercorariidae" genus="Stercorarius" kingdom="Animalia" order="Charadriiformes" pageId="31" pageNumber="32" phylum="Chordata" rank="species" species="skua">
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<emphasis id="E599EAA8FFB3FFB1FE8F7C50FDF5793A" box="[345,555,836,862]" italics="true" pageId="31" pageNumber="32">Stercorarius skua</emphasis>
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(Brünnich, 1764)
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</taxonomicName>
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, a bird which was a common companion during our field work at Profilstranda, Ny
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<collectingRegion id="1529F858FFB3FFB1FDFD7C73FD4279E5" box="[555,668,871,897]" country="Netherlands" name="Fryslan" pageId="31" pageNumber="32">Friesland</collectingRegion>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="9FF76531FFB3FFB1FF6B7CBDFBF67F36" pageId="31" pageNumber="32" type="materials_examined">
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<paragraph id="D75236BAFFB3FFB1FF6B7CBDFEB279A6" blockId="31.[189,364,936,963]" box="[189,364,936,963]" pageId="31" pageNumber="32">
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<heading id="8C1A81D6FFB3FFB1FF6B7CBDFEB279A6" bold="true" box="[189,364,936,963]" fontSize="11" level="3" pageId="31" pageNumber="32" reason="3">
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<emphasis id="E599EAA8FFB3FFB1FF6B7CBDFEB279A6" bold="true" box="[189,364,936,963]" pageId="31" pageNumber="32">Type material</emphasis>
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</heading>
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</paragraph>
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<paragraph id="D75236BAFFB3FFB1FF3C7CC3FE267E70" blockId="31.[189,504,983,1044]" pageId="31" pageNumber="32">
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<materialsCitation id="67853CE7FFB3FFB1FF3C7CC3FE267E70" ID-GBIF-Occurrence="3421082301" collectionCode="FMNH-P" pageId="31" pageNumber="32" specimenCode="FMNH-P30272" specimenCount="1" typeStatus="holotype">
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<emphasis id="E599EAA8FFB3FFB1FF3C7CC3FE827995" bold="true" box="[234,348,983,1009]" pageId="31" pageNumber="32">
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<typeStatus id="08568818FFB3FFB1FF3C7CC3FE827995" box="[234,348,983,1009]" pageId="31" pageNumber="32" type="holotype">Holotype</typeStatus>
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</emphasis>
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<specimenCount id="C1EBFD33FFB3FFB1FF6B7CEEFEEF7E70" box="[189,305,1018,1044]" pageId="31" pageNumber="32" type="generic">Specimen</specimenCount>
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<specimenCode id="874B9EC1FFB3FFB1FEEE7CEEFE2A7E70" box="[312,500,1018,1044]" collectionCode="FMNH-P" pageId="31" pageNumber="32">FMNH-P30272</specimenCode>
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.
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</materialsCitation>
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</paragraph>
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<paragraph id="D75236BAFFB3FFB1FF3C7B28FC337EDB" blockId="31.[189,1400,1084,1216]" pageId="31" pageNumber="32">
|
||
<materialsCitation id="67853CE7FFB3FFB1FF3C7B28FC377EDB" ID-GBIF-Occurrence="3421082311" collectionCode="P" location="one from bed PO 123" pageId="31" pageNumber="32" specimenCode="FMNH-P30271, FMNH-P30263, P30264, P30273, P30275, P30277, P30408, P30471" specimenCount="1" typeStatus="paratype">
|
||
<emphasis id="E599EAA8FFB3FFB1FF3C7B28FEB97E32" bold="true" box="[234,359,1084,1110]" pageId="31" pageNumber="32">
|
||
<typeStatus id="08568818FFB3FFB1FF3C7B28FEB97E32" box="[234,359,1084,1110]" pageId="31" pageNumber="32" type="paratype">Paratypes</typeStatus>
|
||
</emphasis>
|
||
<specimenCount id="C1EBFD33FFB3FFB1FF6B7B4BFEA77E1D" box="[189,377,1119,1145]" pageId="31" pageNumber="32">Nine specimens</specimenCount>
|
||
from type locality,
|
||
<location id="D2326061FFB3FFB1FDB07B74FCB67E1D" LSID="urn:lsid:plazi:treatment:5F4487ACFFB3FF8EFD977E79FC937E6D:D2326061FFB3FFB1FDB07B74FCB67E1D" box="[614,872,1119,1146]" name="one from bed PO 123" pageId="31" pageNumber="32">one from bed PO 123</location>
|
||
(
|
||
<specimenCode id="874B9EC1FFB3FFB1FCAF7B4BFBE67E1D" box="[889,1080,1119,1145]" pageId="31" pageNumber="32">FMNH-P30271</specimenCode>
|
||
),
|
||
<location id="D2326061FFB3FFB1FB9B7B4BFAA87E1D" LSID="urn:lsid:plazi:treatment:5F4487ACFFB3FF8EFD977E79FC937E6D:D2326061FFB3FFB1FB9B7B4BFAA87E1D" box="[1101,1398,1119,1145]" name="eight from bed PO 123.3" pageId="31" pageNumber="32">eight from bed PO 123.3</location>
|
||
(
|
||
<specimenCode id="874B9EC1FFB3FFB1FF107B96FE5A7EF8" box="[198,388,1154,1180]" pageId="31" pageNumber="32">FMNH-P30263</specimenCode>
|
||
,
|
||
<specimenCode id="874B9EC1FFB3FFB1FE467B96FE327EF8" box="[400,492,1154,1180]" pageId="31" pageNumber="32">P30264</specimenCode>
|
||
,
|
||
<specimenCode id="874B9EC1FFB3FFB1FE2F7B96FD8B7EF8" box="[505,597,1154,1180]" pageId="31" pageNumber="32">P30273</specimenCode>
|
||
,
|
||
<specimenCode id="874B9EC1FFB3FFB1FDB47B96FD657EF9" box="[610,699,1154,1181]" pageId="31" pageNumber="32">P30275</specimenCode>
|
||
to
|
||
<specimenCode id="874B9EC1FFB3FFB1FD347B96FCE17EF8" box="[738,831,1154,1180]" pageId="31" pageNumber="32">P30277</specimenCode>
|
||
,
|
||
<specimenCode id="874B9EC1FFB3FFB1FC9D7B96FC767EF8" box="[843,936,1154,1180]" pageId="31" pageNumber="32">P30408</specimenCode>
|
||
,
|
||
<specimenCode id="874B9EC1FFB3FFB1FC627B96FBCC7EF8" box="[948,1042,1154,1180]" pageId="31" pageNumber="32">P30471</specimenCode>
|
||
),
|
||
<locationDeviation id="C6E02F98FFB3FFB1FBF17B96FDDD7EDB" pageId="31" pageNumber="32">
|
||
<quantity id="10159B5FFFB3FFB1FBF17B96FB1C7EF9" box="[1063,1218,1154,1181]" metricMagnitude="2" metricUnit="m" metricValue="1.2015" metricValueMax="1.2029999999999998" metricValueMin="1.2" pageId="31" pageNumber="32" unit="m" value="120.15" valueMax="120.3" valueMin="120.0">120–120.3 m</quantity>
|
||
above the base of the Olenidsletta Member
|
||
</locationDeviation>
|
||
,
|
||
<location id="D2326061FFB3FFB1FDD87BB1FD3A7EA4" LSID="urn:lsid:plazi:treatment:5F4487ACFFB3FF8EFD977E79FC937E6D:D2326061FFB3FFB1FDD87BB1FD3A7EA4" box="[526,740,1189,1216]" name="V 2 a trilobite zone" pageId="31" pageNumber="32">
|
||
<date id="A353107AFFB3FFB1FDD87BB1FDEC7EDB" box="[526,562,1189,1215]" pageId="31" pageNumber="32">V2</date>
|
||
a trilobite zone
|
||
</location>
|
||
,
|
||
<location id="D2326061FFB3FFB1FD267BB1FC507EDB" LSID="urn:lsid:plazi:treatment:5F4487ACFFB3FF8EFD977E79FC937E6D:D2326061FFB3FFB1FD267BB1FC507EDB" box="[752,910,1189,1215]" name="Blackhillsian" pageId="31" pageNumber="32">Blackhillsian</location>
|
||
,
|
||
<location id="D2326061FFB3FFB1FC4C7BB1FC377EDB" LSID="urn:lsid:plazi:treatment:5F4487ACFFB3FF8EFD977E79FC937E6D:D2326061FFB3FFB1FC4C7BB1FC377EDB" box="[922,1001,1189,1215]" name="Floian" pageId="31" pageNumber="32">Floian</location>
|
||
</materialsCitation>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="D75236BAFFB3FFB1FF6B7BF3FE257F65" blockId="31.[189,507,1255,1281]" box="[189,507,1255,1281]" pageId="31" pageNumber="32">
|
||
<heading id="8C1A81D6FFB3FFB1FF6B7BF3FE257F65" bold="true" box="[189,507,1255,1281]" fontSize="11" level="3" pageId="31" pageNumber="32" reason="3">
|
||
<emphasis id="E599EAA8FFB3FFB1FF6B7BF3FE257F65" bold="true" box="[189,507,1255,1281]" pageId="31" pageNumber="32">Type locality and horizon</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="D75236BAFFB3FFB1FF6B7A02FBF67F36" blockId="31.[189,1399,1301,1363]" pageId="31" pageNumber="32">
|
||
From Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, bed
|
||
<collectionCode id="B1FCAE7FFFB3FFB1FBCB7A01FB9C7F4B" box="[1053,1090,1301,1327]" country="Russia" name="Collection of the Zoological Institute of the Russian Academy of Sciences" pageId="31" pageNumber="32">PO</collectionCode>
|
||
123.3,
|
||
<quantity id="10159B5FFFB3FFB1FB4A7A01FB237F54" box="[1180,1277,1301,1328]" metricMagnitude="2" metricUnit="m" metricValue="1.2029999999999998" pageId="31" pageNumber="32" unit="m" value="120.3">120.3 m</quantity>
|
||
above the base of the Olenidsletta Member,
|
||
<collectionCode id="B1FCAE7FFFB3FFB1FD9F7A2DFD817F37" box="[585,607,1337,1363]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="31" pageNumber="32" type="Museum">V</collectionCode>
|
||
2a trilobite zone, Blackhillsian, Floian.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<caption id="83926632FFB3FFB1FF6B786DFD467DBE" ID-DOI="http://doi.org/10.5281/zenodo.5793480" ID-Zenodo-Dep="5793480" httpUri="https://zenodo.org/record/5793480/files/figure.png" pageId="31" pageNumber="32" startId="31.[189,232,1913,1939]" targetBox="[207,1390,1547,1866]" targetPageId="31">
|
||
<paragraph id="D75236BAFFB3FFB1FF6B786DFD467DBE" blockId="31.[187,1399,1913,2010]" pageId="31" pageNumber="32">
|
||
<emphasis id="E599EAA8FFB3FFB1FF6B786DFEC67DF7" bold="true" box="[189,280,1913,1939]" pageId="31" pageNumber="32">Fig. 20.</emphasis>
|
||
Diagrams of relative conch width and angles of expansion of species of
|
||
<taxonomicName id="10ED4D39FFB3FFB1FB86786DFAD97DF7" authority="Kröger & Pohle, 2021" authorityName="Kröger & Pohle" authorityYear="2021" box="[1104,1287,1913,1939]" class="Cephalopoda" family="Rioceratidae" genus="Svalbardoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Tetrabranchia" pageId="31" pageNumber="32" phylum="Mollusca" rank="genus" status="gen. nov.">
|
||
<emphasis id="E599EAA8FFB3FFB1FB86786DFAD97DF7" box="[1104,1287,1913,1939]" italics="true" pageId="31" pageNumber="32">Svalbardoceras</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="FEAA57D3FFB3FFB1FAD8786DFAA97DF7" box="[1294,1399,1913,1939]" pageId="31" pageNumber="32" rank="genus">gen. nov.</taxonomicNameLabel>
|
||
from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection id="9FF76531FF8CFF8EFF6B7E1CFC937E6D" pageId="32" pageNumber="33" type="description">
|
||
<paragraph id="D75236BAFF8CFF8EFF6B7E1CFE907B46" blockId="32.[189,334,264,290]" box="[189,334,264,290]" pageId="32" pageNumber="33">
|
||
<heading id="8C1A81D6FF8CFF8EFF6B7E1CFE907B46" bold="true" box="[189,334,264,290]" fontSize="11" level="3" pageId="32" pageNumber="33" reason="3">
|
||
<emphasis id="E599EAA8FF8CFF8EFF6B7E1CFE907B46" bold="true" box="[189,334,264,290]" pageId="32" pageNumber="33">Description</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="D75236BAFF8CFF8EFF6B7E23FD3E7BF3" blockId="32.[189,1399,311,408]" pageId="32" pageNumber="33">
|
||
The conchs are slightly curved with angle of expansion of <ca 7° (mean angle of expansion = 4.8°, 1
|
||
<superScript id="20989BF2FF8CFF8EFF1A7E4EFF097B0C" attach="none" box="[204,215,346,360]" fontSize="6" pageId="32" pageNumber="33">st</superScript>
|
||
–3
|
||
<superScript id="20989BF2FF8CFF8EFF227E4DFEDC7B03" attach="left" box="[244,258,345,359]" fontSize="6" pageId="32" pageNumber="33">rd</superScript>
|
||
quantile: 3.3–4.8; n = 7), which decreases with conch size from ca 11° to 5° (
|
||
<figureCitation id="4FD62A3FFF8CFF8EFB737E4EFADC7B10" box="[1189,1282,346,372]" captionStart="Fig" captionStartId="31.[189,232,1913,1939]" captionTargetBox="[207,1390,1547,1866]" captionTargetId="figure-225@31.[189,1398,1534,1874]" captionTargetPageId="31" captionText="Fig. 20.Diagrams of relative conch width and angles of expansion of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements." figureDoi="http://doi.org/10.5281/zenodo.5793480" httpUri="https://zenodo.org/record/5793480/files/figure.png" pageId="32" pageNumber="33">Figs 20</figureCitation>
|
||
,
|
||
<figureCitation id="4FD62A3FFF8CFF8EFAD97E4EFAB57B10" box="[1295,1387,346,372]" captionStart="Fig" captionStartId="33.[189,232,1680,1706]" captionTargetBox="[192,1394,870,1626]" captionTargetId="figure-90@33.[189,1398,870,1643]" captionTargetPageId="33" captionText="Fig. 22. Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–D. Svalbardoceras skua gen. et sp. nov. from bed PO 123.3. A. Specimen FMNH-P30277, lateral view, venter, prosiphuncular side toward the right. B. Specimen FMNH-P30272, holotype, lateral view, venter, prosiphuncular side toward the left. C. Specimen FMNH-P30276, lateral view of adult (?), body chamber, with venter, prosiphuncular side toward the left. D. Specimen FMNH-P30263, lateral view of a fragmentary body chamber, with venter, prosiphuncular side toward the left. E–G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. E. Specimen FMNH-P30379. F. Specimen FMNH-P30373, lateral view with venter, prosiphuncular side toward the right. G. Specimen FMNH-P30368, holotype, lateral view with venter, prosiphuncular side toward the right. Scale bar = 10 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.5793488" httpUri="https://zenodo.org/record/5793488/files/figure.png" pageId="32" pageNumber="33">22A–D</figureCitation>
|
||
). The conch cross section is invariantly circular.
|
||
</paragraph>
|
||
<paragraph id="D75236BAFF8CFF8EFF6B7EABFA9F7B98" blockId="32.[189,1398,447,509]" pageId="32" pageNumber="33">
|
||
The conch surface is ornamented with fine growth lines or growth bands (
|
||
<figureCitation id="4FD62A3FFF8CFF8EFBE17EABFB7D7BBD" box="[1079,1187,447,473]" captionStart="Fig" captionStartId="40.[189,232,1780,1806]" captionTargetBox="[369,1217,265,1736]" captionTargetId="figure-13@40.[369,1218,265,1743]" captionTargetPageId="40" captionText="Fig. 29. Median sections of phragmocones of Bactroceras Holm, 1898. A, C–D. Bactroceras fluvii sp. nov., from Profilbekken river basin, locality PR-phosphatic. A. Specimen FMNH-P30159, with adapical siphuncular segment, taphonomically slightly distorted.B. Bactroceras boliviensisAubrechtová, 2015, FMNH-P30176 from bed PO 131, extreme apical part. C–D. Specimen FMNH-P30177, holotype. C. Details of the protoconch. D. Apical part with transition toward juvenile growth stages; note the slightly expanded siphuncular segments. Scale bars: A = 5 mm; B–C = 1 mm; D = 2 mm." figureDoi="http://doi.org/10.5281/zenodo.5793512" httpUri="https://zenodo.org/record/5793512/files/figure.png" pageId="32" pageNumber="33">Fig. 29C</figureCitation>
|
||
) and annulations, which are slightly obliquely transverse, and shifted toward the aperture at the antisiphuncular side.
|
||
</paragraph>
|
||
<paragraph id="D75236BAFF8CFF8EFF6B7D37FE3E78E0" blockId="32.[188,1399,547,645]" pageId="32" pageNumber="33">
|
||
The sutures are slightly obliquely transverse and shifted toward the aperture at the antisiphuncular side. The relative chamber length (rCL) decreases with increasing conch cross section (
|
||
<figureCitation id="4FD62A3FFF8CFF8EFBA57D53FB177805" box="[1139,1225,583,609]" captionStart="Fig" captionStartId="32.[189,232,1914,1940]" captionTargetBox="[206,1392,1493,1866]" captionTargetId="figure-314@32.[189,1398,1460,1876]" captionTargetPageId="32" captionText="Fig. 21. Diagrams of relative chamber length and relative siphuncular diameter of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements." figureDoi="http://doi.org/10.5281/zenodo.5793484" httpUri="https://zenodo.org/record/5793484/files/figure.png" pageId="32" pageNumber="33">Fig. 21</figureCitation>
|
||
), ranging from ca 0.25 to more than 0.3.
|
||
</paragraph>
|
||
<paragraph id="D75236BAFF8CFF8EFF6B7DBFFD7C79FD" blockId="32.[188,1400,683,921]" pageId="32" pageNumber="33">
|
||
The siphuncle is marginally positioned, very slightly removed from the conch margin (
|
||
<figureCitation id="4FD62A3FFF8CFF8EFB607DBFFAFF78A1" box="[1206,1313,683,709]" captionStart="Fig" captionStartId="34.[188,231,1816,1842]" captionTargetBox="[189,1395,566,1776]" captionTargetId="figure-102@34.[189,1398,566,1776]" captionTargetPageId="34" captionText="Fig. 23. Median sections of phragmocones of Svalbardoceras gen. nov., from Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A, C, E, G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. A, E. Specimen FMNH-P30371. B, D, F. Svalbardoceras skua gen. et sp. nov., from bed PO 123.3. B. Specimen FMNH-P30275. C, G. Specimen FMNH-P30368, holotype. D, F. Specimen FMNH-P30471, oblique sagittal section through siphuncle, distance from conch margin is cutting effect. Scale bars: A–D = 5 mm; E–G = 1 mm." figureDoi="http://doi.org/10.5281/zenodo.5793492" httpUri="https://zenodo.org/record/5793492/files/figure.png" pageId="32" pageNumber="33">Fig. 23B</figureCitation>
|
||
), at the concave side of the conch curvature with a mean rSD of 0.16 (1
|
||
<superScript id="20989BF2FF8CFF8EFC6D7DDAFC1878B8" attach="none" box="[955,966,718,732]" fontSize="6" pageId="32" pageNumber="33">st</superScript>
|
||
–3
|
||
<superScript id="20989BF2FF8CFF8EFC357DDAFC2F78B8" attach="left" box="[995,1009,718,732]" fontSize="6" pageId="32" pageNumber="33">rd</superScript>
|
||
quantile: 0.13–0.19; n = 4). The septal necks are orthochoanitic. The connecting ring is moderately thick and forms slightly concave siphuncular segments (
|
||
<figureCitation id="4FD62A3FFF8CFF8EFE1F7C01FDEC794B" box="[457,562,789,815]" captionStart="Fig" captionStartId="34.[188,231,1816,1842]" captionTargetBox="[189,1395,566,1776]" captionTargetId="figure-102@34.[189,1398,566,1776]" captionTargetPageId="34" captionText="Fig. 23. Median sections of phragmocones of Svalbardoceras gen. nov., from Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A, C, E, G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. A, E. Specimen FMNH-P30371. B, D, F. Svalbardoceras skua gen. et sp. nov., from bed PO 123.3. B. Specimen FMNH-P30275. C, G. Specimen FMNH-P30368, holotype. D, F. Specimen FMNH-P30471, oblique sagittal section through siphuncle, distance from conch margin is cutting effect. Scale bars: A–D = 5 mm; E–G = 1 mm." figureDoi="http://doi.org/10.5281/zenodo.5793492" httpUri="https://zenodo.org/record/5793492/files/figure.png" pageId="32" pageNumber="33">Fig. 23F</figureCitation>
|
||
). Weak epi-, and hyposeptal deposits occur in the extreme apical part of specimen FMNH-P30274 at a conch height of ca <
|
||
<quantity id="10159B5FFF8CFF8EFCCD7C2CFCA77937" box="[795,889,824,851]" metricMagnitude="-3" metricUnit="m" metricValue="2.8" pageId="32" pageNumber="33" unit="mm" value="2.8">2.8 mm</quantity>
|
||
. In
|
||
<specimenCount id="C1EBFD33FF8CFF8EFC737C2DFB987936" box="[933,1094,824,851]" pageId="32" pageNumber="33" type="generic">one specimen</specimenCount>
|
||
part of the body chamber is preserved (specimen FMNH-P30276); the body chamber is>
|
||
<quantity id="10159B5FFF8CFF8EFC667C4FFBDD7912" box="[944,1027,859,886]" metricMagnitude="-2" metricUnit="m" metricValue="2.6" pageId="32" pageNumber="33" unit="mm" value="26.0">26 mm</quantity>
|
||
long and the conch diameter at the position of the last septum is
|
||
<quantity id="10159B5FFF8CFF8EFD977C6AFD4079FD" box="[577,670,894,921]" metricMagnitude="-3" metricUnit="m" metricValue="5.5" pageId="32" pageNumber="33" unit="mm" value="5.5">5.5 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="D75236BAFF8CFF8EFF6B7CD4FE8679BE" blockId="32.[189,344,960,986]" box="[189,344,960,986]" pageId="32" pageNumber="33">
|
||
<heading id="8C1A81D6FF8CFF8EFF6B7CD4FE8679BE" bold="true" box="[189,344,960,986]" fontSize="11" level="3" pageId="32" pageNumber="33" reason="3">
|
||
<emphasis id="E599EAA8FF8CFF8EFF6B7CD4FE8679BE" bold="true" box="[189,344,960,986]" pageId="32" pageNumber="33">Comparison</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="D75236BAFF8CFF8EFF6B7CFBFC937E6D" blockId="32.[189,845,1006,1033]" box="[189,845,1006,1033]" pageId="32" pageNumber="33">
|
||
See above, under
|
||
<taxonomicName id="10ED4D39FF8CFF8EFE5B7CFAFD4B7E6C" authority="Kröger & Pohle, 2021" authorityName="Kröger & Pohle" authorityYear="2021" box="[397,661,1006,1032]" class="Cephalopoda" family="Rioceratidae" genus="Svalbardoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Tetrabranchia" pageId="32" pageNumber="33" phylum="Mollusca" rank="species" species="sterna" status="gen. et sp. nov.">
|
||
<emphasis id="E599EAA8FF8CFF8EFE5B7CFAFD4B7E6C" box="[397,661,1006,1032]" italics="true" pageId="32" pageNumber="33">Svalbardoceras sterna</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="FEAA57D3FF8CFF8EFD4B7CFBFC937E6D" box="[669,845,1007,1033]" pageId="32" pageNumber="33" rank="species">gen. et sp. nov.</taxonomicNameLabel>
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |