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Developmental milestones in captive Galago moholi.

Brenna R McGovern-Lind1, Kathryn A Proffitt1, Scot E E King2

  • 1School of Physical Therapy, Slippery Rock University, Slippery Rock, Pennsylvania, USA.

American Journal of Primatology
|May 8, 2024
PubMed
Summary

The study reveals modular development in Galago moholi, with rapid ossification for leaping and early tooth eruption for hunting, while brain growth extends longer. This primate shows a developmental "race" for key adult features.

Keywords:
bushbabylocomotionontogenyvertical clinger and leaper

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Area of Science:

  • Primate developmental biology
  • Comparative anatomy
  • Paleoanthropology

Background:

  • Body systems exhibit modular development, with varying rates across species.
  • Primate neural development is typically rapid, contrasting with more variable dental development.

Purpose of the Study:

  • To investigate the developmental patterns of the skull, teeth, and postcrania in the leaping primate Galago moholi.
  • To understand the timing of key morphological developments related to locomotion and diet in this species.

Main Methods:

  • Microcomputed tomography (microCT) and histology were used to reconstruct skeletal and dental structures.
  • Amira software facilitated 3D reconstructions and endocranial volume computation.
  • Eighteen specimens from birth to adult provided a developmental series.

Main Results:

  • Wrist and ankle ossification complete by 1 month, coinciding with the onset of leaping.
  • Endocranial volume reaches adult size by 2 months postnatal.
  • Deciduous teeth erupt by 2 weeks, with young consuming arthropods by 4 weeks.

Conclusions:

  • Galago moholi displays a modular developmental pattern, with a rapid "race" for leaping-critical morphology.
  • Rapid dental development supports an early transitional diet and hunting behavior.
  • Prolonged nursing likely supports extended brain growth in this species.