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id="siteSub" class="noprint">Da Wikipedia, l'enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Reindirizzamento da <strong><a href="/w/index.php?title=Cretoxyrhinidae&redirect=no" class="mw-redirect" title="Cretoxyrhinidae">Cretoxyrhinidae</a></strong>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r143074810">.mw-parser-output .sinottico{background-color:#f8f9fa;border:1px solid #c8ccd1;border-spacing:0;clear:right;float:right;font-size:95%;line-height:1.4em;margin:0 0 1em 1.5em;width:280px}.mw-parser-output .sinottico caption{font-weight:bold}.mw-parser-output .sinottico>tbody>tr>th:not(:only-child),.mw-parser-output .sinottico_annidata>tbody>tr>th:not(:only-child){background-color:#f3f3f3;border-right:1px solid #e5e5e8;text-align:left;vertical-align:top}.mw-parser-output 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.sinottico_annidata:last-child>tbody>tr:last-child>th{border-bottom:none}.mw-parser-output .sinottico_divisione+.sinottico_divisione>th,.mw-parser-output .sinottico_testata+.sinottico_divisione>th{border-top:2px solid #f8f9fa}.mw-parser-output .sinottico_divisione th{background-color:#eeeeee;padding:.15em .4em;text-align:center}.mw-parser-output .sinottico_piede{text-align:center;font-size:90%;background:#EFEFEF}.mw-parser-output .sinottico_piede2{background-color:white;font-size:xx-small;padding-bottom:0;text-align:right}.mw-parser-output .sinottico_sottotitolo{font-size:80%}.mw-parser-output .sinottico_testata th{background-color:#dedede;font-size:116%;padding:.2em .4em;text-align:center}.mw-parser-output .sinottico_testo_centrale{text-align:center}</style><table class="infobox sinottico" summary="Tabella sinottica che riassume i principali dati del soggetto" style="width:230px"><tbody><tr class="sinottico_testata"><th colspan="2" style="background-color: pink; color: black;"><div class="noprint" style="position:relative; float:right; font-size:70%;"><figure class="mw-default-size noresize" typeof="mw:File"><span title="Come leggere il tassobox"><img alt="Come leggere il tassobox" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Information-silk.svg/16px-Information-silk.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Information-silk.svg/24px-Information-silk.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/51/Information-silk.svg/32px-Information-silk.svg.png 2x" data-file-width="16" data-file-height="16" usemap="#ImageMap_37fb70b5d7ceee19" /></span><map name="ImageMap_37fb70b5d7ceee19"><area href="/wiki/Progetto:Forme_di_vita/Come_leggere_il_tassobox" shape="rect" coords="0,0,50,50" alt="Progetto:Forme di vita/Come leggere il tassobox" title="Progetto:Forme di vita/Come leggere il tassobox" /></map><figcaption>Come leggere il tassobox</figcaption></figure></div>Cretossirina</th></tr><tr><td class="sinottico_testo_centrale" colspan="2"><figure class="mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:Cretoxyrhina_mantelli_21DB.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/29/Cretoxyrhina_mantelli_21DB.jpg/220px-Cretoxyrhina_mantelli_21DB.jpg" decoding="async" width="220" height="103" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/29/Cretoxyrhina_mantelli_21DB.jpg/330px-Cretoxyrhina_mantelli_21DB.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/29/Cretoxyrhina_mantelli_21DB.jpg/440px-Cretoxyrhina_mantelli_21DB.jpg 2x" data-file-width="4271" data-file-height="1991" /></a><figcaption></figcaption></figure></td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: pink; color: black;"><a href="/wiki/Stato_di_conservazione_(biologia)" title="Stato di conservazione (biologia)">Stato di conservazione</a></th></tr><tr><td class="sinottico_testo_centrale" colspan="2"><div style="margin:0 auto; text-align:center;background:white;" class="skin-invert itwiki-preserve-color"><div style="color:#25383c;font-weight:bold;">Fossile<span style="color:#25383c;"></span></div></div> </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: pink; color: black;"><a href="/wiki/Classificazione_scientifica" title="Classificazione scientifica">Classificazione scientifica</a></th></tr><tr><th style="font-weight:normal"><a href="/wiki/Dominio_(biologia)" title="Dominio (biologia)">Dominio</a></th><td><a href="/wiki/Eukaryota" title="Eukaryota">Eukaryota</a> </td></tr><tr><th style="font-weight:normal; width:50%"><a href="/wiki/Regno_(biologia)" title="Regno (biologia)">Regno</a></th><td><a href="/wiki/Animalia" title="Animalia">Animalia</a> </td></tr><tr><th style="font-weight:normal"><a href="/wiki/Phylum" title="Phylum">Phylum</a></th><td><a href="/wiki/Chordata" title="Chordata">Chordata</a> </td></tr><tr><th style="font-weight:normal"><a href="/wiki/Classe_(tassonomia)" title="Classe (tassonomia)">Classe</a></th><td><a href="/wiki/Chondrichthyes" title="Chondrichthyes">Chondrichthyes</a> </td></tr><tr><th style="font-weight:normal"><a href="/wiki/Famiglia_(tassonomia)" title="Famiglia (tassonomia)">Famiglia</a></th><td><a href="/wiki/Cretoxyrhinidae" class="mw-redirect" title="Cretoxyrhinidae">Cretoxyrhinidae</a> </td></tr><tr><th style="font-weight:normal"><a href="/wiki/Genere_(tassonomia)" title="Genere (tassonomia)">Genere</a></th><td><i><b>Cretoxyrhina</b></i><br /><span style="font-variant: small-caps">Glikman, 1958</span> </td></tr><tr><th style="font-weight:normal"><a href="/wiki/Specie" title="Specie">Specie</a></th><td><i><b>C. mantelli</b></i> </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: pink; color: black;"><a href="/wiki/Nomenclatura_binomiale" title="Nomenclatura binomiale">Nomenclatura binomiale</a></th></tr><tr><td class="sinottico_testo_centrale" colspan="2"><i><b>Cretoxyrhina mantelli</b></i><br /><span style="font-variant: small-caps"><a href="/wiki/Louis_Agassiz" title="Louis Agassiz">Agassiz</a>, <a href="/wiki/1843" title="1843">1843</a></span> </td></tr></tbody></table> <p>Lo <b> squalo ginsu </b> o <b>cretossirina</b> (<i><b>Cretoxyrhina mantelli</b></i> <span style="font-variant: small-caps"><a href="/wiki/Louis_Agassiz" title="Louis Agassiz">Agassiz</a>, 1843</span>) era un grosso <a href="/wiki/Squalo" class="mw-redirect" title="Squalo">squalo</a> preistorico, vissuto nel <a href="/wiki/Cretaceo_superiore" class="mw-redirect" title="Cretaceo superiore">Cretaceo</a> tra l'<a href="/wiki/Albiano_(geologia)" title="Albiano (geologia)">Albiano</a> e il <a href="/wiki/Campaniano" title="Campaniano">Campaniano</a>. Resti della specie sono stati trovati in molte parti d'<a href="/wiki/Europa" title="Europa">Europa</a> e negli <a href="/wiki/Stati_Uniti_d%27America" title="Stati Uniti d'America">Stati Uniti</a> (<a href="/wiki/Kansas" title="Kansas">Kansas</a> e <a href="/wiki/Texas" title="Texas">Texas</a>). Fu descritto nel <a href="/wiki/1843" title="1843">1843</a> da <a href="/wiki/Louis_Agassiz" title="Louis Agassiz">Louis Agassiz</a> nel monumentale <i>Recherches sur les Poissons fossiles</i> (<i>Ricerche sui Pesci fossili</i>), un trattato di 1.420 pagine. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Descrizione">Descrizione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cretoxyrhina_mantelli&veaction=edit&section=1" title="Modifica la sezione Descrizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cretoxyrhina_mantelli&action=edit&section=1" title="Edit section's source code: Descrizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Simile all'odierno <a href="/wiki/Squalo_bianco" class="mw-redirect" title="Squalo bianco">squalo bianco</a>, questo pesce poteva raggiungere una lunghezza massima di 8,5 metri (per quanto solitamente le dimensioni medie si aggiravano intorno ai 4/5,5 - 7,10 metri) e possedeva un corpo robusto e potente. Al contrario di molti squali fossili, la cretoxirina è conosciuta grazie a diversi scheletri quasi completi. I suoi <a href="/wiki/Denti" class="mw-redirect" title="Denti">denti</a> raggiungevano i 5-7 centimetri di lunghezza, erano ricurvi e taglienti (da qui il soprannome "squalo ginsu"), con uno spesso rivestimento di smalto (come gli odierni squali). Questo squalo doveva essere uno dei massimi predatori dei mari del <a href="/wiki/Cretaceo_superiore" class="mw-redirect" title="Cretaceo superiore">Cretaceo Superiore</a> insieme ai <a href="/wiki/Mosasauro" class="mw-redirect" title="Mosasauro">mosasauri</a>: resti fossili di denti di cretossirina sono stati rinvenuti insieme a scheletri del mosasauro <i><a href="/wiki/Tylosaurus" title="Tylosaurus">Tylosaurus</a></i>, a dimostrazione del fatto che lo squalo si nutriva dei mosasauri o era con essi in competizione nella ricerca di cibo.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Si nutriva anche di <a href="/wiki/Plesiosauri" class="mw-redirect" title="Plesiosauri">Plesiosauri</a>,<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Xiphactinus" class="mw-redirect" title="Xiphactinus">Xiphactinus</a>,<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> e tartarughe <a href="/wiki/Protostegidae" title="Protostegidae">protostegidae</a>.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:MenuhaCretoxyrhinaMantelli.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6e/MenuhaCretoxyrhinaMantelli.jpg/220px-MenuhaCretoxyrhinaMantelli.jpg" decoding="async" width="220" height="169" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6e/MenuhaCretoxyrhinaMantelli.jpg/330px-MenuhaCretoxyrhinaMantelli.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6e/MenuhaCretoxyrhinaMantelli.jpg/440px-MenuhaCretoxyrhinaMantelli.jpg 2x" data-file-width="1778" data-file-height="1367" /></a><figcaption>Denti fossili di <i>C. mantelli</i> provenienti da <a href="/wiki/Israele" title="Israele">Israele</a></figcaption></figure> <p>Nel 1999 fece scalpore la presenza di un esemplare di 6 metri assieme a due pesci <a href="/wiki/Bananogmius" title="Bananogmius">Bananogmius</a> ritrovati parzialmente digeriti nel corpo fossilizzato di un <a href="/wiki/Tylosaurus_proriger" class="mw-redirect" title="Tylosaurus proriger">Tylosaurus proriger</a> di oltre 14 metri di lunghezza, probabilmente l'ultimo pasto prima del decesso del predatore. Nonostante le dimensioni quasi doppie di questa specie rispetto all'attuale squalo bianco bisogna comunque tener presente che per i mosasauridi di taglia medio-grande o superiore la <a href="/wiki/Cretoxyrhina" class="mw-redirect" title="Cretoxyrhina">Cretoxyrhina</a> rappresentasse una possibile fonte di cibo in caso di competizione diretta, al pari della relazione odierna tra lo <a href="/wiki/Squalo_tigre" class="mw-redirect" title="Squalo tigre">Squalo tigre</a> e l'<a href="/wiki/Orca" class="mw-redirect" title="Orca">Orca</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Ritrovamenti">Ritrovamenti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cretoxyrhina_mantelli&veaction=edit&section=2" title="Modifica la sezione Ritrovamenti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cretoxyrhina_mantelli&action=edit&section=2" title="Edit section's source code: Ritrovamenti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Dopo l'iniziale scoperta del <a href="/wiki/1843" title="1843">1843</a> in Europa, numerosi resti fossili di questa specie sono stati rinvenuti in <a href="/wiki/Kansas" title="Kansas">Kansas</a>, che a quel tempo era ricoperto da un mare poco profondo che si estendeva per tutti gli Stati Uniti centrali. Questi reperti includono anche un esemplare della lunghezza di oltre sei metri.<sup id="cite_ref-GGS_5-0" class="reference"><a href="#cite_note-GGS-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><br /> <a href="/w/index.php?title=Kenshu_Shimada&action=edit&redlink=1" class="new" title="Kenshu Shimada (la pagina non esiste)">Kenshu Shimada</a>, un paleontologo nippo-americano, basandosi sui resti ritrovati nel Kansas ritiene che <i>Cretoxyrhina mantelli</i> occupasse nella scala dei predatori di quel tempo il ruolo oggi occupato dallo squalo bianco (<i><a href="/wiki/Carcharodon_carcharias" title="Carcharodon carcharias">Carcharodon carcharias</a></i>), con cui condivideva la struttura corporale.<sup id="cite_ref-CFS_6-0" class="reference"><a href="#cite_note-CFS-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> La morfologia della pinna caudale indica che questo squalo doveva essere in grado di nuotare piuttosto velocemente.<sup id="cite_ref-CFS_6-1" class="reference"><a href="#cite_note-CFS-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Cretoxyrhina_mantelli_size2.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Cretoxyrhina_mantelli_size2.svg/220px-Cretoxyrhina_mantelli_size2.svg.png" decoding="async" width="220" height="123" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Cretoxyrhina_mantelli_size2.svg/330px-Cretoxyrhina_mantelli_size2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Cretoxyrhina_mantelli_size2.svg/440px-Cretoxyrhina_mantelli_size2.svg.png 2x" data-file-width="2500" data-file-height="1400" /></a><figcaption>Ricostruzione di <i>Cretoxyrhina mantelli</i></figcaption></figure> <p>Numerosi fossili di <i>Cretoxyrhina</i> sono stati ritrovati anche in <a href="/wiki/Italia" title="Italia">Italia</a>. Il primo esemplare particolarmente completo (composto da 122 vertebre e da una cinquantina di denti) fu rinvenuto nel 1878 nella cava di Olantreghe (Castellavazzo, Belluno)<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>. Successivamente nel giacimento di <a href="/wiki/Monte_Loffa" title="Monte Loffa">Monte Loffa</a>, nel comune di <a href="/wiki/Sant%27Anna_d%27Alfaedo" title="Sant'Anna d'Alfaedo">Sant'Anna d'Alfaedo</a> (<a href="/wiki/Verona" title="Verona">Verona</a>), sono venuti alla luce altri scheletri quasi completi, lunghi oltre 5,5 metri. Uno di questi esemplari, rinvenuto nel 1975, conta di 155 vertebre e di numerosi denti, sparsi nella regione del capo; i denti più grandi sono lunghi circa 6 centimetri. Tali reperti sono conservati presso il Museo Preistorico e Paleontologico di Sant'Anna d'Alfaedo. </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cretoxyrhina_mantelli&veaction=edit&section=3" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cretoxyrhina_mantelli&action=edit&section=3" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Rothschild, B. M., <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110716052420/http://www.njgonline.nl/publish/articles/000268/article.pdf"><span style="font-style:italic;">Sharks eating mosasaurs, dead or alive?</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), in <span style="font-style:italic;">Netherlands Journal of Geosciencesvolume 21</span>, n. 4, 2005, pp. 335-340. <small>URL consultato il 2 ottobre 2009</small> <small>(archiviato dall'<abbr title="http://www.njgonline.nl/publish/articles/000268/article.pdf">url originale</abbr> il 16 luglio 2011)</small>.</cite></span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Everhart, M. J., <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110716064113/http://www.palarch.nl/wp-content/everhart_mj_bite_marks_on_an_elasmosaur_sauropterygia_plesiosauria_paddle_from_the_niobrara_chalk_upper_cretaceous_as_probable_evidence_of_feeding_by_the_lamniform_shark_cretoxyrhina_mantelli_palarchs.pdf"><span style="font-style:italic;">Bite marks on an elasmosaur (Sauropterygia; Plesiosauria) paddle from the Niobrara Chalk (Upper Cretaceous) as probable evidence of feeding by the lamniform shark, Cretoxyrhina mantelli</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), PalArch Foundation, 2005. <small>URL consultato il 2 ottobre 2009</small> <small>(archiviato dall'<abbr title="http://www.palarch.nl/wp-content/everhart_mj_bite_marks_on_an_elasmosaur_sauropterygia_plesiosauria_paddle_from_the_niobrara_chalk_upper_cretaceous_as_probable_evidence_of_feeding_by_the_lamniform_shark_cretoxyrhina_mantelli_palarchs.pdf">url originale</abbr> il 16 luglio 2011)</small>.</cite></span> </li> <li id="cite_note-3"><a href="#cite_ref-3"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Shimada, Kenshu, <a rel="nofollow" class="external text" href="http://findarticles.com/p/articles/mi_qa3790/is_199709/ai_n8760035/pg_5/?tag=content;col1"><span style="font-style:italic;">Paleoecological relationships of the Late Cretaceous lamniform shark, Cretoxyrhina mantelli (Agassiz)</span></a>, in <span style="font-style:italic;">Journal of Paleontology</span>, 1997. <small>URL consultato il 2 ottobre 2009</small>.</cite></span> </li> <li id="cite_note-4"><a href="#cite_ref-4"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Shimada, Kenshu, Hooks, G. E., <a rel="nofollow" class="external text" href="http://findarticles.com/p/articles/mi_qa3790/is_200401/ai_n9368107/"><span style="font-style:italic;">SHARK-BITTEN PROTOSTEGID TURTLES from the UPPER CRETACEOUS MOOREVILLE CHALK, ALABAMA</span></a>, in <span style="font-style:italic;">Journal of Paleontology</span>, 2004. <small>URL consultato il 2 ottobre 2009</small>.</cite></span> </li> <li id="cite_note-GGS-5"><a href="#cite_ref-GGS_5-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Mike Everhart, <a rel="nofollow" class="external text" href="http://www.oceansofkansas.com/BigShark.html"><span style="font-style:italic;">A GIANT GINSU SHARK (Cretoxyrhina mantelli Agassiz) From Late CRETACEOUS Chalk of KANSAS</span></a>, su <span style="font-style:italic;">oceansofkansas.com</span>.</cite></span> </li> <li id="cite_note-CFS-6"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-CFS_6-0">a</a></i></sup> <sup><i><a href="#cite_ref-CFS_6-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Shimada, Kenshu, Cumbaa, S. L., Rooyen, D. V., <a rel="nofollow" class="external text" href="http://www.nmnaturalhistory.org/science/bulletins/35/sci_bulletin35_22.pdf"><span style="font-style:italic;">Caudal Fin Skeleton of the LATE CRETACEOUS LAMNIFORM SHARK, CRETOXYRHINA MANTELLI, from the NIOBRARA CHALK OF KANSAS</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), New Mexico Museum of Natural History, 2006. <small>URL consultato il 2 ottobre 2009</small>.</cite></span> </li> <li id="cite_note-7"><a href="#cite_ref-7"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Bassani, F., <span style="font-style:italic;">Colonna vertebrale di Oxyrhina Mantelli, Agassiz, scoperta nel calcare senoniano di Castellavazzo, nel Bellunese</span>, in <span style="font-style:italic;">Memorie della Società Italiana delle Scienze (detta dei XL)</span>, vol. 7, n. 5, 1888, pp. 1-5.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cretoxyrhina_mantelli&veaction=edit&section=4" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cretoxyrhina_mantelli&action=edit&section=4" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www.elasmo-research.org/education/evolution/cretoxyrhina.htm"><span style="font-style:italic;">ReefQuest</span></a>, su <span style="font-style:italic;">elasmo-research.org</span>.</cite></li></ul> <div class="noprint" style="width:100%; 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