c29a18f069dd315cebec255ef223dba8 pmc_35207537.pdf cb097fab556894b74d6c92747cba5e6404995509 pmc_35207537.pdf 4135c550223401b7ff77fb2f395317e71549141ec00b834f2638f8220a6f8204 pmc_35207537.pdf Title: A “Mammalian-like” Pycnodont Fish: Independent Acquisition of Thecodont Implantation, True Vertical Replacement, and Carnassial Dentitions in Carnivorous Mammals and a Peculiar Group of Pycnodont Fish Subject: Vertebrates developed tooth replacement over 400 million years ago. Then, 200 million years later, the combination of vertical tooth replacement with the thecodont implantation (teeth in bone sockets) appeared a key morphological innovation in mammalian evolution. However, we discovered that an extinct fish taxon, Serrasalmimus secans, showed the same innovation in the lineage Serrasalmimidae, which survived the end Cretaceous mass extinction event. The carnassial teeth are known in both mammals and pycnodont fish, but these teeth do not share the same tissues or developmental processes. Therefore, this serrasalmimid pycnodont fish might have independently acquired mammal-like tooth replacement and implantation, indicating that the fish and mammals convergently evolved the carnassial dental morphologies at about the same time, approximately 60 My ago, in separate ecosystems. Keywords: tooth replacement; pycnodont; serrasalmimid; carnassial teeth; K-Pg mass extinction; carnivorous mammals Author: Kumiko Matsui and Yuri Kimura Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Fri Feb 18 08:31:58 2022 CET ModDate: Fri Feb 18 08:34:38 2022 CET Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 8 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 2028964 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- JGLGGL+VnURWPalladioL Type 1 Custom yes yes no 10 0 GOFIPZ+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 LDXBZW+URWPalladioL-Roma Type 1 Custom yes yes no 20 0 DTVKCK+URWPalladioL-Ital Type 1 Custom yes yes no 24 0 MCBCCI+SourceSansRoman-Regular Type 1C Custom yes yes no 32 0 MCBCCM+SourceSansRoman.613wght Type 1C Custom yes yes no 36 0 MCBCCO+SourceSansRoman-Bold Type 1C Custom yes yes no 40 0 PJCGLK+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 53 0 OVNEXW+EURM10 Type 1 Builtin yes yes no 75 0 FXXUVH+CMSY10 Type 1 Builtin yes yes no 97 0 NUUXUW+VnURWPalladioL-Italic Type 1 Custom yes yes no 107 0 Jhove (Rel. 1.22.1, 2019-04-17) Date: 2022-07-05 02:28:22 CEST RepresentationInformation: pmc_35207537.pdf ReportingModule: PDF-hul, Rel. 1.12.1 (2019-04-17) LastModified: 2022-02-27 18:33:29 CET Size: 2028964 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 253 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@4923ab24 Item: Title: Methods Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@44c8afef Item: Title: Results and Discussion Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@7b69c6ba Item: Title: Conclusions Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@46daef40 Item: Title: References Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@12f41634 Info: Title: A “Mammalian-like” Pycnodont Fish: Independent Acquisition of Thecodont Implantation, True Vertical Replacement, and Carnassial Dentitions in Carnivorous Mammals and a Peculiar Group of Pycnodont Fish Author: Kumiko Matsui and Yuri Kimura Subject: Vertebrates developed tooth replacement over 400 million years ago. Then, 200 million years later, the combination of vertical tooth replacement with the thecodont implantation (teeth in bone sockets) appeared a key morphological innovation in mammalian evolution. However, we discovered that an extinct fish taxon, Serrasalmimus secans, showed the same innovation in the lineage Serrasalmimidae, which survived the end Cretaceous mass extinction event. The carnassial teeth are known in both mammals and pycnodont fish, but these teeth do not share the same tissues or developmental processes. Therefore, this serrasalmimid pycnodont fish might have independently acquired mammal-like tooth replacement and implantation, indicating that the fish and mammals convergently evolved the carnassial dental morphologies at about the same time, approximately 60 My ago, in separate ecosystems. 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