app/models/nomenclatural_rank/iczn/higher_classification_group.rb
class NomenclaturalRank::Iczn::HigherClassificationGroup < NomenclaturalRank::Iczn
def self.validate_name_format(taxon_name)
taxon_name.errors.add(:name, 'name must be capitalized') unless !taxon_name.name.blank? && taxon_name.name == taxon_name.name.capitalize
taxon_name.errors.add(:name, 'name must be at least two letters') unless taxon_name.name.length > 1
end
def self.valid_parents
self.collect_descendants_to_s(
NomenclaturalRank::Iczn::HigherClassificationGroup)
end
end