taxonomy

botanical

International Association for Plant Taxonomy IAPT

International Code of Nomenclature for algae, fungi, and plants ICN (Shenzhen Code 2018)

Index Nominum Genericorium (ING)

The International Plant Name Index IPNI

Paul Silva's  Index Nominum Algarum INA

zoological

International Commission on Zoological Nomenclature ICZN

The ICZN Code

Nomenclator Zoologicus  search utility  paper

BioCode 2011  ICB