Project 2750: C. T. Heck, A. Fiorillo, D. J. Varricchio, T. J. Gaudin, H. N. Woodward, J. R. Horner. 2019. Ontogenetic changes in the long bone microstructure in the nine-banded armadillo (Dasypus novemcinctus). PLOS ONE. 14 (4):e0215655.
Specimen: Dasypus novemcinctus (UTCM:801)
View: Full Tibia Circular Light


Analysis of ontogenetic changes in long bone microstructure aid in vertebrate life history reconstructions. Specifically, osteohistological examination of common fauna can be used to infer growth strategies of biologically uncommon, threatened, or extinct vertebrates. Although nine-banded armadillo biology has been studied extensively, work on growth history is limited. Here we describe long bone microstructure in tibiae and femora of a limited ontogenetic series of nine- banded armadillos (Dasypus novemcinctus) to elucidate patterns of bone growth. The cortex of the smallest individual is composed of compacted coarse cancellous bone (CCCB) and woven tissue. Extensive cortical drift is driven by periosteal erosion and further compaction of trabeculae resulting in an increase in the amount of CCCB. The cortex of the largest specimens is primarily CCCB with thickened endosteal bone and thin outer cortices of lamellar and parallel-fibered tissue. The outer cortices of the largest individuals are interpreted as an external fundamental system (EFS) indicating a cessation of appositional bone corresponding to skeletal maturity (i.e. asymptotic or adult size). The EFS forms in femora prior to tibiae, indicating femoral growth rates begin decreasing earlier than tibial in D. novemcinctus. Growth trends in common fauna like the nine-banded armadillo can be used as a foundation for understanding life histories of related, but uncommon or extinct, species of cingulates.

Read the article »

Article DOI: 10.1371/journal.pone.0215655

Project DOI: 10.7934/P2750,
This project contains
  • 27 Media
  • 1 Taxon
  • 6 Specimens
Total size of project's media files: 4.38G

Download Project SDD File
Currently Viewing:
MorphoBank Project 2750

    Authors' Institutions

    • Chapman University

    • Montana State University

    • Oklahoma State University

    • University of Tennessee


    member name taxa specimens media
    Christian Heck
    Project Administrator

    Project has no matrices defined.

    Project views

    type number of views Individual items viewed (where applicable)
    Total project views8234
    Project overview625
    Media views5014Media search (1015 views); M658798 (153 views); M658830 (146 views); M658853 (147 views); M658818 (152 views); M658795 (145 views); M658851 (138 views); M658846 (149 views); M658847 (161 views); M658797 (141 views); M658825 (145 views); M658850 (142 views); M658819 (152 views); M658852 (141 views); M658823 (145 views); M658820 (152 views); M658821 (149 views); M658809 (145 views); M658854 (156 views); M658831 (141 views); M658840 (179 views); M658804 (144 views); M658822 (146 views); M658839 (143 views); M658826 (153 views); M658796 (146 views); M658827 (145 views); M658824 (143 views);
    Taxon list364
    Specimen list1135
    Views for media list889
    Documents list5

    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project98
    Project downloads96
    Media downloads2M658796 (1 download); M658809 (1 download);