Orthology established by Galicia et al., 2018 (14 genes)

Orthology for dscama ( Chr: 10 )
Orthology for dscamb ( Chr: 15 )
Orthology for dscaml1 ( Chr: 15 )
Orthology for sdk1a ( Chr: 3 )
Orthology for sdk1b ( Chr: 1 )
Orthology for sdk2a ( Chr: 3 )
Orthology for sdk2b ( Chr: 12 )