Gender-specific reproductive tissue in ratites and Tyrannosaurus rex - PubMed (original) (raw)

. 2005 Jun 3;308(5727):1456-60.

doi: 10.1126/science.1112158.

Affiliations

• PMID: 15933198
• DOI: 10.1126/science.1112158

Gender-specific reproductive tissue in ratites and Tyrannosaurus rex

Mary H Schweitzer et al. Science. 2005.

Abstract

Unambiguous indicators of gender in dinosaurs are usually lost during fossilization, along with other aspects of soft tissue anatomy. We report the presence of endosteally derived bone tissues lining the interior marrow cavities of portions of Tyrannosaurus rex (Museum of the Rockies specimen number 1125) hindlimb elements, and we hypothesize that these tissues are homologous to specialized avian tissues known as medullary bone. Because medullary bone is unique to female birds, its discovery in extinct dinosaurs solidifies the link between dinosaurs and birds, suggests similar reproductive strategies, and provides an objective means of gender differentiation in dinosaurs.

PubMed Disclaimer

Similar articles

• Chemistry supports the identification of gender-specific reproductive tissue in Tyrannosaurus rex.
  Schweitzer MH, Zheng W, Zanno L, Werning S, Sugiyama T. Schweitzer MH, et al. Sci Rep. 2016 Mar 15;6:23099. doi: 10.1038/srep23099. Sci Rep. 2016. PMID: 26975806 Free PMC article.
• Soft-tissue vessels and cellular preservation in Tyrannosaurus rex.
  Schweitzer MH, Wittmeyer JL, Horner JR, Toporski JK. Schweitzer MH, et al. Science. 2005 Mar 25;307(5717):1952-5. doi: 10.1126/science.1108397. Science. 2005. PMID: 15790853
• New insights into dinosaur jaw muscle anatomy.
  Holliday CM. Holliday CM. Anat Rec (Hoboken). 2009 Sep;292(9):1246-65. doi: 10.1002/ar.20982. Anat Rec (Hoboken). 2009. PMID: 19711458 Review.
• Medullary bone in fossils: function, evolution and significance in growth curve reconstructions of extinct vertebrates.
  Prondvai E. Prondvai E. J Evol Biol. 2017 Mar;30(3):440-460. doi: 10.1111/jeb.13019. Epub 2016 Dec 8. J Evol Biol. 2017. PMID: 27862520 Review.

Cited by

• Osteohistology of a Triassic dinosaur population reveals highly variable growth trajectories typified early dinosaur ontogeny.
  Barta DE, Griffin CT, Norell MA. Barta DE, et al. Sci Rep. 2022 Oct 15;12(1):17321. doi: 10.1038/s41598-022-22216-x. Sci Rep. 2022. PMID: 36243889 Free PMC article.
• Integrating gross morphology and bone histology to assess skeletal maturity in early dinosauromorphs: new insights from Dromomeron (Archosauria: Dinosauromorpha).
  Griffin CT, Bano LS, Turner AH, Smith ND, Irmis RB, Nesbitt SJ. Griffin CT, et al. PeerJ. 2019 Feb 11;7:e6331. doi: 10.7717/peerj.6331. eCollection 2019. PeerJ. 2019. PMID: 30775169 Free PMC article.
• Taphonomic and Diagenetic Pathways to Protein Preservation, Part I: The Case of Tyrannosaurus rex Specimen MOR 1125.
  Ullmann PV, Macauley K, Ash RD, Shoup B, Scannella JB. Ullmann PV, et al. Biology (Basel). 2021 Nov 17;10(11):1193. doi: 10.3390/biology10111193. Biology (Basel). 2021. PMID: 34827186 Free PMC article.
• Chemistry supports the identification of gender-specific reproductive tissue in Tyrannosaurus rex.
  Schweitzer MH, Zheng W, Zanno L, Werning S, Sugiyama T. Schweitzer MH, et al. Sci Rep. 2016 Mar 15;6:23099. doi: 10.1038/srep23099. Sci Rep. 2016. PMID: 26975806 Free PMC article.
• Estrogen levels influence medullary bone quantity and density in female house finches and pine siskins.
  Squire ME, Veglia MK, Drucker KA, Brazeal KR, Hahn TP, Watts HE. Squire ME, et al. Gen Comp Endocrinol. 2017 May 15;246:249-257. doi: 10.1016/j.ygcen.2016.12.015. Epub 2016 Dec 28. Gen Comp Endocrinol. 2017. PMID: 28039066 Free PMC article.

Publication types

MeSH terms

LinkOut - more resources

• Full Text Sources

  • Atypon
  • Ovid Technologies, Inc.

• Other Literature Sources

  • The Lens - Patent Citations Database