* extraembryonic membranes
  * merged mesoderm/mesenchyme fake distinctions
  * merged ectoderm and epithelium terms for EE membranes
 * made names for various nerves more univocal, also added branching relations
  * frontal
  * cervical
 * skull/head improvements, particularly auditory regions
  * NT: entotympanic, anterior part of tympanic bone, signoid process
 * cetacean terms
  * NTs: nasal air sac, phonic lip, dorsal bursa + subtypes, MLDB complex, blowhole ligament, core of melon organ
 * NT: vallecula of cerebellum
 * laryngeal ligaments:
  * NT: cricopharyngeal ligament, thyroepiglottic, vestibular, cricoarytenoid, cricotracheal
  * fixed def for ligament of larynx
 * neural nuclei:
  * merged fastigial nucleus + nucleu fastigii
  * merged dentate nucleus + nucleus dentatus
  * renamed cerebellar nucleus -> nucleus of cerebellar nuclear complex
 * added def for patagium
     * extraembryonic membranes
      * merged mesoderm/mesenchyme fake distinctions
      * merged ectoderm and epithelium terms for EE membranes
     * made names for various nerves more univocal, also added branching relations
      * frontal
      * cervical
     * skull/head improvements, particularly auditory regions
      * NT: entotympanic, anterior part of tympanic bone, signoid process
     * cetacean terms
      * NTs: nasal air sac, phonic lip, dorsal bursa + subtypes, MLDB complex, blowhole ligament, core of melon organ
     * NT: vallecula of cerebellum
     * laryngeal ligaments:
      * NT: cricopharyngeal ligament, thyroepiglottic, vestibular, cricoarytenoid, cricotracheal
      * fixed def for ligament of larynx
     * neural nuclei:
      * merged fastigial nucleus + nucleu fastigii
      * merged dentate nucleus + nucleus dentatus
      * renamed cerebellar nucleus -> nucleus of cerebellar nuclear complex
     * added def for patagium
 * NTs: ovarian medulla, ovarian cortex (required for CL)
 * minor changes for acetabulum related terms
 * overhaul of keratinized structures and oral epithelium
 * olfactory system changes
  * various fixes based on discussion with MM and reading Bulter+Hodos
  * NT: telencephalic white matter
  * NT: olfactory pathway
  * changes to parthood relations for bulb, cortex, tract. some demoted to overlaps
added "null" entry for blank defs