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Middle Ordovician (middle Darriwilian) Dirafinesquina and Jigunsania gen. nov. (Rafinesquinidae

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dc.contributor.author오영주-
dc.contributor.authorLee Sangmin-
dc.contributor.authorPark, Tae-Yoon S.-
dc.contributor.authorLee Dong-Chan-
dc.date.accessioned2023-12-06T16:38:46Z-
dc.date.available2023-12-06T16:38:46Z-
dc.date.issued2023-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/14926-
dc.description.abstractThree rafinesquinid brachiopod (Strophomenoidea) species, Dirafinesquina chosenensis, Jigunsania guraeriensis gen. et sp. nov., and Jigunsania hambaeksanensis gen. et sp. nov. are described from the Middle Ordovician (middle Darriwilian) Jigunsan and Duwibong formations in the Taebaeksan Basin, South Korea of the Sino-Korean platform of North China. Dirafinesquina chosenensis is distinguished from the other two Dirafinesquina species, D. globosa and D. antiqua by having postero-lateral ridges parallel to socket ridges in the dorsal valve. Jigunsania gen. nov. is distinctive among the rafinesquinids in having strongly developed and posteriorly curved alae at cardinal extremities and characterized by having dorsal geniculation, prominent postero-lateral rugae, and subperipheral rim on the dorsal interior. Compared with the two rafinesquinid subfamilies (Rafinesquininae and Leptaeninae), Jigunsania bears typical rafinesquinine features such as bifid triangular cardinal process lobes and straight socket ridges and is most similar to Kjaerina, whereas it has the subperipheral rim which is diagnostic to the leptaenines but generally absent in the rafinesquinines, and thus considered to be taxonomically significant in separating the two subfamilies. Jigunsania is tentatively assigned to the Rafinesquininae due to its great resemblance to Kjaerina. The spatio-temporal distribution of Kjaerina suggests that once originated from the middle Darriwilian Jigunsania in the low-latitude province in the late Darriwilian, it rapidly diversified into other regions including the high-latitude province during the Sandbian and Katian. The onset of diversification and paleobiogeographic expansion of Kjaerina appears to be late among the strophomenoids which first began to diversify during the Darriwilian at species and generic level. The leptaenines, a predominantly post-Ordovician rafinesquinid group, is also considered to have been derived from Jigunsania and not undergone the Darriwilian diversification onset. In addition, the occurrence of Dirafinesquina suggests that the South Korean brachiopod fauna including orthides may be closely linked with the paleobiogeographically important Saucrorthis Fauna recognized in South China, Alborz (northern Iran), and Sibumasu (Myanmar).-
dc.languageEnglish-
dc.subject.classification해당사항없음-
dc.titleMiddle Ordovician (middle Darriwilian) Dirafinesquina and Jigunsania gen. nov. (Rafinesquinidae-
dc.titleStrophomenoidea-
dc.titleBrachiopoda) from South Korea, with discussion of rafinesquinid evolution-
dc.title.alternative한국에서 발견된 중기 오르도비스기 (중기 다리윌리안) Dirafinesquina와 신속 Jigunsania 기재를 기반으로 한 rafinesquinid 완족동물 진화에 관한 토의-
dc.typeArticle-
dc.identifier.bibliographicCitation오영주, et al. 2023. "Middle Ordovician (middle Darriwilian) Dirafinesquina and Jigunsania gen. nov. (Rafinesquinidae". <em>GEOSCIENCES JOURNAL</em>, 27(3): 253-270.-
dc.citation.titleGEOSCIENCES JOURNAL-
dc.citation.volume27-
dc.citation.number3-
dc.identifier.doi10.1007/s12303-022-0034-x-
dc.citation.startPage253-
dc.citation.endPage270-
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2021:84.653-
dc.subject.keywordDirafinesquina-
dc.subject.keywordJigunsan Formation-
dc.subject.keywordJigunsania-
dc.subject.keywordKjaerina-
dc.subject.keywordSino-Korean platform-
dc.subject.keywordTaebaeksan Basin-
dc.identifier.localId2023-0171-
Appears in Collections  
2023-2023, Advancement into unexplored areas of North Greenland through paleoenvironment and animal evolution research (23-23) / Park, Tae-Yoon S. (PE23060)
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