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How to make a vampire.

Timothy D Smith1, Kristen A Prufrock2, Valerie B DeLeon3

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

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Summary
This summary is machine-generated.

Newborn vampire bats (Desmodus) are neurally and dentally advanced but have underdeveloped limbs, especially the forelimb. This study compares perinatal and adult bat anatomy, revealing precocious development in some areas and delayed development in others.

Keywords:
altricialepiphyseal platemidfacialodontogenesisprecocial

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Area of Science:

  • Comparative anatomy
  • Developmental biology
  • Paleontology

Background:

  • Understanding the developmental trajectory of altricial and precocial mammals is crucial for evolutionary studies.
  • The common vampire bat (Desmodus rotundus) presents a unique case for developmental research due to its specialized diet and social behavior.

Purpose of the Study:

  • To compare the developmental maturity of cranial, limb, and feeding structures in perinatal and adult common vampire bats.
  • To introduce a novel method for 3D endocast reconstruction in poorly ossified skulls using microCT and contrast-enhanced CT.

Main Methods:

  • Microcomputed tomography (microCT) and diffusible iodine-based contrast-enhanced CT were used to scan perinatal and adult Desmodus specimens.
  • Imaging software was employed to segment bone, soft tissues, jaw/limb muscles, and endocranial cavities.
  • A new method was developed for 3D endocast reconstruction of immature skulls.

Main Results:

  • Perinatal Desmodus exhibits 74% of adult endocranial volume, with nearly identical permanent tooth socket volumes but less developed facial skeletons.
  • Forelimbs are less ossified than hind limbs, with a cartilaginous carpus and active growth zones.
  • Hind limbs are precociously ossified distally, and leg/foot musculature is relatively well-developed (23-25% of adult volume).

Conclusions:

  • Common vampire bats are born neurally and dentally precocious.
  • Limb development is generally underdeveloped, particularly the forelimb, contrasting with advanced cranial and dental development.
  • The enhanced grip capability of newborns is supported by well-developed leg and foot musculature.