Sexual dimorphism is a commonly observed phenomenon in the natural world today but it is far more difficult to determine how common it was in extinct taxa. Here, we describe a new specimen of Pankowskichthys libanicus (Pycnodontiformes, Gladiopycnodontidae) from Haqel, Lebanon (MNHN HAK 1950), which has distinct morphological differences from the holotype of this taxon (IRSNB P9278) which occurs in Hjoula, Lebanon but has also been found at Haqel. Since most of the cranial and pectoral girdle morphologies as well as other postcranial characters are similar to that seen in IRSNB P9278, the distinctive characters seen in MNHN HAK 1950 are unlikely to define a second species but rather represent sexual dimorphic traits.
两性二态现象在当今的自然界中是一种常见的现象，但要确定它在已灭绝的分类群中有多普遍要困难得多。本文描述了在黎巴嫩Haqel发现的一种新的Pankowskichthys libanicus (Pycnodontiformes, Gladiopycnodontidae)标本(MNHN HAK 1950)，该标本与该分类群(IRSNB P9278)有明显的形态差异，该分类群在黎巴嫩Hjoula发现，但也在Haqel发现。由于大多数头颅和胸带形态以及其他颅后特征与IRSNB P9278相似，因此在MNHN HAK 1950中看到的独特特征不太可能定义第二个物种，而是代表性别二态特征。
{"title":"Possible sexual dimorphism in <i>Pankowskichthys libanicus</i> (Neopterygii, Pycnodontiformes) from the Cenomanian of Lebanon.","authors":"John J Cawley, Jürgen Kriwet","doi":"10.14456/randk.2017.8","DOIUrl":"https://doi.org/10.14456/randk.2017.8","url":null,"abstract":"<p><p>Sexual dimorphism is a commonly observed phenomenon in the natural world today but it is far more difficult to determine how common it was in extinct taxa. Here, we describe a new specimen of <i>Pankowskichthys libanicus</i> (Pycnodontiformes, Gladiopycnodontidae) from Haqel, Lebanon (MNHN HAK 1950), which has distinct morphological differences from the holotype of this taxon (IRSNB P9278) which occurs in Hjoula, Lebanon but has also been found at Haqel. Since most of the cranial and pectoral girdle morphologies as well as other postcranial characters are similar to that seen in IRSNB P9278, the distinctive characters seen in MNHN HAK 1950 are unlikely to define a second species but rather represent sexual dimorphic traits.</p>","PeriodicalId":33331,"journal":{"name":"Research Knowledge","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6276997/pdf/emss-75837.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36754817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Over roughly the last decade, the Lebanese Cenomanian localities have revealed high numbers of newly discovered pycnodont taxa and even two new families of pycnodonts. Here, two new taxa of pycnodont fishes from the Near East are presented, one from Lebanon and the other from Israel. The new Lebanese specimens show us that Lebanon is still a major site for discovering new pycnodont taxa and can give major insights into their evolution and possible life history. Conversely, the new taxon from Israel shows that lesser known fossiliferous sites may tell us more about the true state of diversity of pycnodonts in the Late Cretaceous.
{"title":"New information about late cretaceous pycnodont fishes (Actinoptergyii, Pycnodontiformes) from the near east.","authors":"J. Cawley, J. Kriwet","doi":"10.14456/randk.2017.12","DOIUrl":"https://doi.org/10.14456/randk.2017.12","url":null,"abstract":"Over roughly the last decade, the Lebanese Cenomanian localities have revealed high numbers of newly discovered pycnodont taxa and even two new families of pycnodonts. Here, two new taxa of pycnodont fishes from the Near East are presented, one from Lebanon and the other from Israel. The new Lebanese specimens show us that Lebanon is still a major site for discovering new pycnodont taxa and can give major insights into their evolution and possible life history. Conversely, the new taxon from Israel shows that lesser known fossiliferous sites may tell us more about the true state of diversity of pycnodonts in the Late Cretaceous.","PeriodicalId":33331,"journal":{"name":"Research Knowledge","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66676819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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