Animal Transcription Start Codon Identification

I am compiling a concise reference on the start codons that initiate transcription in animals and need a specialist who can gather, verify, and clearly present this information. The scope is confined to the animal kingdom; bacteria, plants, and other taxa are out of scope for this task.

Here is what I need from you:
• A brief explanation of what qualifies as a transcriptional start codon in animals, backed by up-to-date primary literature.
• A definitive list of every recognized start codon, noting any species-specific or lineage-specific variants if they exist.
• Supporting evidence for each codon: journal citations, GenBank or Ensembl accession numbers, or other reputable database links.
• A short commentary (a few sentences each) on any controversies, recently discovered alternatives, or unresolved questions in the field.

Please deliver your findings as a well-structured Word or Google Docs report plus a separate spreadsheet (CSV or Excel) containing the codon sequence, associated species (where relevant), evidence link, and citation. I will review for completeness, correct citations, and clarity before release.

A background in molecular genetics or bioinformatics—and the ability to navigate databases such as NCBI, Ensembl, or UCSC Genome Browser—will make this straightforward for you.