First column has every intron ID in that genome and intron class and second column has comma-delimited list of intron IDs of orthologous introns. Note that all of the introns in the second column are orthologous to the intron in the first column but may all be orthologous to each other.
U12 Introns U2 Introns
Anopheles gambiae (AgamP4) Anopheles gambiae (AgamP4)
Apis mellifera (Amel_4.5) Apis mellifera (Amel_4.5)
Arabidopsis thaliana (TAIR10) Arabidopsis thaliana (TAIR10)
Bos taurus (UMD3.1) Bos taurus (UMD3.1)
Caenorhabditis elegans (WBcel235) Caenorhabditis elegans (WBcel235)
Canis familiaris (CanFam3.1) Canis familiaris (CanFam3.1)
Ciona intestinalis (KH) Ciona intestinalis (KH)
Danio rerio (GRCz11) Danio rerio (GRCz11)
Drosophila melanogaster (BDGP6) Drosophila melanogaster (BDGP6)
Gallus gallus (Galgal5) Gallus gallus (Galgal5)
Glycine max (Gm02) Glycine max (Gm02)
Homo sapiens (GRCh37) Homo sapiens (GRCh37)
Homo sapiens (GRCh38) Homo sapiens (GRCh38)
Macaca mulatta (Mmul_8.0.1) Macaca mulatta (Mmul_8.0.1)
Monodelphis domestica (monDom5) Monodelphis domestica (monDom5)
Mus musculus (GRCm38) Mus musculus (GRCm38)
Oryza sativa (IRGSP-1.0) Oryza sativa (IRGSP-1.0)
Pan troglodytes (Pan_tro_3.0) Pan troglodytes (Pan_tro_3.0)
Rattus norvegicus (Rnor_6.0) Rattus norvegicus (Rnor_6.0)
Saccharomyces cerevisiae (R64-1-1) Saccharomyces cerevisiae (R64-1-1)
Schizosaccharomyces pombe (ASM294v2) Schizosaccharomyces pombe (ASM294v2)
Takifugu rubripes (FUGU5) Takifugu rubripes (FUGU5)
Tetraodon nigroviridis (TETRAODON8) Tetraodon nigroviridis (TETRAODON8)
Xenopus tropicalis (JGI_4.2) Xenopus tropicalis (JGI_4.2)
Zea mays (AGPv4) Zea mays (AGPv4)