Hokkaidoconcha Kaim, Jenkins & Waren 2008
? Hokkaidoconcha sp. (Fig. 6E–I) Description. Abyssochrysoid shells ornamented with strong orthocline axial ribs which do not reach the suture adapically and with numerous spiral riblets which cross over the axial ribs. Growth lines prosocline. Whorl flanks are weakly inflated and the suture moderat...
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ftzenodo:oai:zenodo.org:6009571 2023-05-15T18:15:06+02:00 Hokkaidoconcha Kaim, Jenkins & Waren 2008 Nakrem, Hans Arne 2017-10-06 https://zenodo.org/record/6009571 https://doi.org/10.5281/zenodo.6009571 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/B5525419D027FFFEFF7BF964FC5EFF2D doi:10.11646/zootaxa.4329.4.3 http://zenodo.org/record/1003014 http://publication.plazi.org/id/496B2C61D020FFF7FFECFFDFFF9BFFD5 doi:10.5281/zenodo.1003024 http://zoobank.org/A0552Ffb-Fe2B-4Fad-809A-A1274Ac86Bcc doi:10.5281/zenodo.6009570 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6009571 https://doi.org/10.5281/zenodo.6009571 oai:zenodo.org:6009571 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, pp. 351-374 in Zootaxa 4329(4) 358-359 Biodiversity Taxonomy Animalia Mollusca Gastropoda Provannidae Hokkaidoconcha info:eu-repo/semantics/other publication-taxonomictreatment 2017 ftzenodo https://doi.org/10.5281/zenodo.600957110.11646/zootaxa.4329.4.310.5281/zenodo.100302410.5281/zenodo.6009570 2023-03-10T18:44:12Z ? Hokkaidoconcha sp. (Fig. 6E–I) Description. Abyssochrysoid shells ornamented with strong orthocline axial ribs which do not reach the suture adapically and with numerous spiral riblets which cross over the axial ribs. Growth lines prosocline. Whorl flanks are weakly inflated and the suture moderately incised. Protoconch and aperture not preserved. Material and occurrence: Three specimens preserved as external moulds from seep #3 (all illustrated: PMO 224.759–761); Sassenfjorden, Svalbard; late Tithonian, Late Jurassic. Remarks. ? Hokkaidoconcha sp. is represented only by shell fragments and several features (e.g. protoconch, aperture) could not be observed in the available specimens. This is why we decided to leave this species in open nomenclature. Similar shells have been described by Sohl (1960) from the Late Cretaceous of the USA as species of Melanatria: Melanatria ? cretacea Wade, 1926 and Melanatria ? sp. The genus Melanatria Bowdich, 1822 is considered to be an objective synonym of Pirena Lamarck, 1822, which in turn is a synonym of Faunus Montfort, 1810 (for details see Köhler & Glaubrecht 2010). In the past, the type species of Melanatria was repeatedly wrongly cited as Buccinum flumineum Gmelin, 1791 (e.g. Sohl 1960), which is now interpreted as nomen dubium (Köhler & Glaubrecht 2010) but previously synonymized with the modern freshwater pachychilid cerithioidean Madagasikara spinosa (Lamarck, 1822). The latter species (and the entire genus Madagasikara) is endemic to Madagascar (Köhler & Glaubrecht 2010). It is therefore rather unlikely that this genus is present in the marine deposits either in the Late Jurassic of Spitsbergen or Late Cretaceous of the USA. Instead, we think that all these shells may represent an as yet undescribed genus of abyssochrysoids similar to Hokkaidoconcha. We do not attempt to describe a new genus here because of the poor preservation of the available material and we temporarily place it in Hokkaidoconcha, pending better material becoming available. ... Other/Unknown Material Sassenfjord* Sassenfjorden Svalbard Spitsbergen Zenodo Lamarck ENVELOPE(140.027,140.027,-66.666,-66.666) Sassenfjorden ENVELOPE(16.217,16.217,78.412,78.412) Svalbard |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Provannidae Hokkaidoconcha |
spellingShingle |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Provannidae Hokkaidoconcha Nakrem, Hans Arne Hokkaidoconcha Kaim, Jenkins & Waren 2008 |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Provannidae Hokkaidoconcha |
description |
? Hokkaidoconcha sp. (Fig. 6E–I) Description. Abyssochrysoid shells ornamented with strong orthocline axial ribs which do not reach the suture adapically and with numerous spiral riblets which cross over the axial ribs. Growth lines prosocline. Whorl flanks are weakly inflated and the suture moderately incised. Protoconch and aperture not preserved. Material and occurrence: Three specimens preserved as external moulds from seep #3 (all illustrated: PMO 224.759–761); Sassenfjorden, Svalbard; late Tithonian, Late Jurassic. Remarks. ? Hokkaidoconcha sp. is represented only by shell fragments and several features (e.g. protoconch, aperture) could not be observed in the available specimens. This is why we decided to leave this species in open nomenclature. Similar shells have been described by Sohl (1960) from the Late Cretaceous of the USA as species of Melanatria: Melanatria ? cretacea Wade, 1926 and Melanatria ? sp. The genus Melanatria Bowdich, 1822 is considered to be an objective synonym of Pirena Lamarck, 1822, which in turn is a synonym of Faunus Montfort, 1810 (for details see Köhler & Glaubrecht 2010). In the past, the type species of Melanatria was repeatedly wrongly cited as Buccinum flumineum Gmelin, 1791 (e.g. Sohl 1960), which is now interpreted as nomen dubium (Köhler & Glaubrecht 2010) but previously synonymized with the modern freshwater pachychilid cerithioidean Madagasikara spinosa (Lamarck, 1822). The latter species (and the entire genus Madagasikara) is endemic to Madagascar (Köhler & Glaubrecht 2010). It is therefore rather unlikely that this genus is present in the marine deposits either in the Late Jurassic of Spitsbergen or Late Cretaceous of the USA. Instead, we think that all these shells may represent an as yet undescribed genus of abyssochrysoids similar to Hokkaidoconcha. We do not attempt to describe a new genus here because of the poor preservation of the available material and we temporarily place it in Hokkaidoconcha, pending better material becoming available. ... |
format |
Other/Unknown Material |
author |
Nakrem, Hans Arne |
author_facet |
Nakrem, Hans Arne |
author_sort |
Nakrem, Hans Arne |
title |
Hokkaidoconcha Kaim, Jenkins & Waren 2008 |
title_short |
Hokkaidoconcha Kaim, Jenkins & Waren 2008 |
title_full |
Hokkaidoconcha Kaim, Jenkins & Waren 2008 |
title_fullStr |
Hokkaidoconcha Kaim, Jenkins & Waren 2008 |
title_full_unstemmed |
Hokkaidoconcha Kaim, Jenkins & Waren 2008 |
title_sort |
hokkaidoconcha kaim, jenkins & waren 2008 |
publishDate |
2017 |
url |
https://zenodo.org/record/6009571 https://doi.org/10.5281/zenodo.6009571 |
long_lat |
ENVELOPE(140.027,140.027,-66.666,-66.666) ENVELOPE(16.217,16.217,78.412,78.412) |
geographic |
Lamarck Sassenfjorden Svalbard |
geographic_facet |
Lamarck Sassenfjorden Svalbard |
genre |
Sassenfjord* Sassenfjorden Svalbard Spitsbergen |
genre_facet |
Sassenfjord* Sassenfjorden Svalbard Spitsbergen |
op_source |
Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, pp. 351-374 in Zootaxa 4329(4) 358-359 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/B5525419D027FFFEFF7BF964FC5EFF2D doi:10.11646/zootaxa.4329.4.3 http://zenodo.org/record/1003014 http://publication.plazi.org/id/496B2C61D020FFF7FFECFFDFFF9BFFD5 doi:10.5281/zenodo.1003024 http://zoobank.org/A0552Ffb-Fe2B-4Fad-809A-A1274Ac86Bcc doi:10.5281/zenodo.6009570 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6009571 https://doi.org/10.5281/zenodo.6009571 oai:zenodo.org:6009571 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.600957110.11646/zootaxa.4329.4.310.5281/zenodo.100302410.5281/zenodo.6009570 |
_version_ |
1766188151254024192 |