Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006
Milesacanthus cf. ancestralis (Fig. 8) MATERIAL. — Nine scales, one of which is lost (M N H N. F.A L D -4 0), a n d o n e t h i n s e c t i o n MNHN.F.ALD-41. DESCRIPTION The crown of these four scales is diamond-shaped and its anterior part may be more rounded as in MNHN.F.ALD-38 (Fig. 8C 2). The c...
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ftzenodo:oai:zenodo.org:4596946 2024-09-15T17:48:13+00:00 Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006 Derycke, Claire Goujet, Daniel 2011-06-30 https://doi.org/10.5281/zenodo.4596946 http://treatment.plazi.org/id/CA2B87AB6C41FFA9F8B6E909918EC99E unknown Zenodo https://doi.org/10.5252/g2011n2a1 http://zenodo.org/record/4597045 http://publication.plazi.org/id/3612FFD36C4CFFA4F855EB1D950DCA55 https://sibils.text-analytics.ch/search/collections/plazi/CA2B87AB6C41FFA9F8B6E909918EC99E https://www.gbif.org/species/180584331 https://www.checklistbank.org/dataset/7717/taxon/CA2B87AB6C41FFA9F8B6E909918EC99E.taxon https://doi.org/10.5281/zenodo.4597063 https://doi.org/10.5281/zenodo.4597049 https://doi.org/10.5281/zenodo.4597047 https://doi.org/10.5281/zenodo.4597061 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.4596945 https://doi.org/10.5281/zenodo.4596946 oai:zenodo.org:4596946 http://treatment.plazi.org/id/CA2B87AB6C41FFA9F8B6E909918EC99E info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Multicuspidate shark teeth associated with chondrichthyan and acanthodian scales from the Emsian (Devonian) of southern Algeria, pp. 209-226 in Geodiversitas, 33(2), 222, (2011-06-30) Biodiversity Taxonomy Animalia Chordata Chondrichthyes Acanthodei Diplacanthidae Milesacanthus Milesacanthus ancestralis info:eu-repo/semantics/other 2011 ftzenodo https://doi.org/10.5281/zenodo.459694610.5252/g2011n2a110.5281/zenodo.459706310.5281/zenodo.459704910.5281/zenodo.459704710.5281/zenodo.459706110.5281/zenodo.4596945 2024-07-25T20:27:44Z Milesacanthus cf. ancestralis (Fig. 8) MATERIAL. — Nine scales, one of which is lost (M N H N. F.A L D -4 0), a n d o n e t h i n s e c t i o n MNHN.F.ALD-41. DESCRIPTION The crown of these four scales is diamond-shaped and its anterior part may be more rounded as in MNHN.F.ALD-38 (Fig. 8C 2). The convex base, also diamond-shaped, and with anterior and rounded posterior edges is located anteriorly. The scales with a flat crown show sub-parallel grooves (18 for Fig. 8A 1, B 2 and possibly more), diverging in the front part (Fig. 8C 2), like in the material of Milesacanthus ancestralis from Saudi Arabia.The grooves are not really deep but narrower than the ridges. Both grooves and ridges run along the entire crown length of the scale. In the scale MNHN.F.ALD-36 (Fig. 8A 1), grooves and ridges start just at the front edge of the scale, whereas in the scale MNHN.F.ALD-37 (Fig. 8B 2) the ridges start at the vertical edge of the crown and the posterior edge is more crenulated. One scale (ALD-38) shows 13 larger grooves (Fig. 8C 2), but only in its anterior part. Pore openings, located mainly at the beginning of the grooves, connect to an ascending canal system. The grooves begin after the anterior edge of the crown and most lateral grooves undulate, slightly converging in the beginning, then parallel to the diagonal, and stop in the posterior third of the crown. The neck is well marked with a row of foramina posteriorly and anteriorly (Fig. 8A 2, B 2, C 2). Furthermore, wart-like protuberances are visible on the posterior neck (Fig. 8A 2; more evident on Fig. 7F), visible on “young” scales according Burrow et al. (2006: 547). HISTOLOGY The thin section 9 MNHN.F.ALD-41 (Fig. 7G) shows a classical pattern for an acanthodian, with a primordium in the middle of the crown that is made of dentine covered with thin box-in-box growth zones continuing from the crown into the acellular bone base. Contrary to Milesacanthus ancestralis and M. antarctica (Young & Burrow 2004), no vascular canal was found, but only one thin ... Other/Unknown Material Antarc* Antarctica Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Chordata Chondrichthyes Acanthodei Diplacanthidae Milesacanthus Milesacanthus ancestralis |
spellingShingle |
Biodiversity Taxonomy Animalia Chordata Chondrichthyes Acanthodei Diplacanthidae Milesacanthus Milesacanthus ancestralis Derycke, Claire Goujet, Daniel Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006 |
topic_facet |
Biodiversity Taxonomy Animalia Chordata Chondrichthyes Acanthodei Diplacanthidae Milesacanthus Milesacanthus ancestralis |
description |
Milesacanthus cf. ancestralis (Fig. 8) MATERIAL. — Nine scales, one of which is lost (M N H N. F.A L D -4 0), a n d o n e t h i n s e c t i o n MNHN.F.ALD-41. DESCRIPTION The crown of these four scales is diamond-shaped and its anterior part may be more rounded as in MNHN.F.ALD-38 (Fig. 8C 2). The convex base, also diamond-shaped, and with anterior and rounded posterior edges is located anteriorly. The scales with a flat crown show sub-parallel grooves (18 for Fig. 8A 1, B 2 and possibly more), diverging in the front part (Fig. 8C 2), like in the material of Milesacanthus ancestralis from Saudi Arabia.The grooves are not really deep but narrower than the ridges. Both grooves and ridges run along the entire crown length of the scale. In the scale MNHN.F.ALD-36 (Fig. 8A 1), grooves and ridges start just at the front edge of the scale, whereas in the scale MNHN.F.ALD-37 (Fig. 8B 2) the ridges start at the vertical edge of the crown and the posterior edge is more crenulated. One scale (ALD-38) shows 13 larger grooves (Fig. 8C 2), but only in its anterior part. Pore openings, located mainly at the beginning of the grooves, connect to an ascending canal system. The grooves begin after the anterior edge of the crown and most lateral grooves undulate, slightly converging in the beginning, then parallel to the diagonal, and stop in the posterior third of the crown. The neck is well marked with a row of foramina posteriorly and anteriorly (Fig. 8A 2, B 2, C 2). Furthermore, wart-like protuberances are visible on the posterior neck (Fig. 8A 2; more evident on Fig. 7F), visible on “young” scales according Burrow et al. (2006: 547). HISTOLOGY The thin section 9 MNHN.F.ALD-41 (Fig. 7G) shows a classical pattern for an acanthodian, with a primordium in the middle of the crown that is made of dentine covered with thin box-in-box growth zones continuing from the crown into the acellular bone base. Contrary to Milesacanthus ancestralis and M. antarctica (Young & Burrow 2004), no vascular canal was found, but only one thin ... |
format |
Other/Unknown Material |
author |
Derycke, Claire Goujet, Daniel |
author_facet |
Derycke, Claire Goujet, Daniel |
author_sort |
Derycke, Claire |
title |
Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006 |
title_short |
Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006 |
title_full |
Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006 |
title_fullStr |
Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006 |
title_full_unstemmed |
Milesacanthus ancestralis Burrow, Lelievre & Janjou 2006 |
title_sort |
milesacanthus ancestralis burrow, lelievre & janjou 2006 |
publisher |
Zenodo |
publishDate |
2011 |
url |
https://doi.org/10.5281/zenodo.4596946 http://treatment.plazi.org/id/CA2B87AB6C41FFA9F8B6E909918EC99E |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Multicuspidate shark teeth associated with chondrichthyan and acanthodian scales from the Emsian (Devonian) of southern Algeria, pp. 209-226 in Geodiversitas, 33(2), 222, (2011-06-30) |
op_relation |
https://doi.org/10.5252/g2011n2a1 http://zenodo.org/record/4597045 http://publication.plazi.org/id/3612FFD36C4CFFA4F855EB1D950DCA55 https://sibils.text-analytics.ch/search/collections/plazi/CA2B87AB6C41FFA9F8B6E909918EC99E https://www.gbif.org/species/180584331 https://www.checklistbank.org/dataset/7717/taxon/CA2B87AB6C41FFA9F8B6E909918EC99E.taxon https://doi.org/10.5281/zenodo.4597063 https://doi.org/10.5281/zenodo.4597049 https://doi.org/10.5281/zenodo.4597047 https://doi.org/10.5281/zenodo.4597061 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.4596945 https://doi.org/10.5281/zenodo.4596946 oai:zenodo.org:4596946 http://treatment.plazi.org/id/CA2B87AB6C41FFA9F8B6E909918EC99E |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.459694610.5252/g2011n2a110.5281/zenodo.459706310.5281/zenodo.459704910.5281/zenodo.459704710.5281/zenodo.459706110.5281/zenodo.4596945 |
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1810289359698526208 |