An ontology for respresenting spatial concepts, anatomical axes, gradients, regions, planes, sides and surfaces. These concepts can be used at multiple biological scales and in a diversity of taxa, including plants, animals and fungi. The BSPO is used to provide a source of anatomical location descriptors for logically defining anatomical entity classes in anatomy ontologies.

You are invited to apply the "Biological Spatial Ontology (BSPO)"-fields, to any i-Naturalist observation.
https://www.inaturalist.org/observation_fields/15408

Get more information about BSPO:
https://jbiomedsem.biomedcentral.com/articles/10.1186/2041-1480-5-34
Browse BSPO:
https://www.ebi.ac.uk/ols/ontologies/bspo

Provided values of the "Biological Spatial Ontology (BSPO)"-field are as following:

axis adaxial-abaxial
axis animal-vegetal
axis anterior-posterior
axis deep-superficial
axis dorsal-ventral
axis left-right
axis medial-external
axis medial-lateral
axis medial-radial
axis oral-aboral
axis proximal-distal
axis relative to direction of growth apical-basal
axis relative to substrate apical-basal
axis upper-lower
compartment anterior
compartment boundary anterior/posterior
compartment boundary apical/basal
compartment boundary deep/superficial
compartment boundary dorsal/ventral
compartment boundary proximal/distal
compartment boundary upper/lower
compartment dorsal
compartment posterior
compartment ventral
gradient anterior-posterior
gradient apical-basal
gradient deep-superficial
gradient dorsal-ventral
gradient proximal-distal
gradient upper-lower
margin anterior
margin antero-dorsal
margin antero-lateral
margin antero-medial
margin antero-ventral
margin apical
margin basal
margin distal
margin dorsal
margin dorso-lateral
margin dorso-medial
margin lateral
margin medial
margin posterior
margin postero-dorsal
margin postero-lateral
margin postero-medial
margin postero-ventral
margin proximal
margin ventral
margin ventro-lateral
margin ventro-medial
plane horizontal
plane midsagittal
plane parasagittal
plane radial
plane sagittal
plane tangential
plane transverse
region anterior
region anterior-most
region antero-dorsal
region antero-lateral
region antero-medial
region antero-ventral
region apical
region axial
region basal
region central
region contralateral
region deep
region distal
region dorsal
region dorsal-most
region dorso-lateral
region dorso-medial
region ipsilateral
region lateral
region lower
region medial
region peripheral
region posterior
region posterior-most
region postero-dorsal
region postero-lateral
region postero-medial
region postero-ventral
region proximal
region superficial
region upper
region ventral
region ventral-most
region ventro-lateral
region ventro-medial
side anterior
side apical
side axial
side basal
side central
side contralateral
side deep
side distal
side dorsal
side inferior
side ipsilateral
side lateral
side left
side lower
side medial
side peripheral
side posterior
side proximal
side right
side superficial
side superior
side upper
side ventral
surface anterior
surface apical
surface basal
surface contralateral
surface distal
surface dorsal
surface ipsilateral
surface lateral
surface medial
surface posterior
surface proximal
surface ventral