Summary of 20 species of Crocodylia investigated in the current study for MHC class II α exons 2 and 3 plus MHC class II β exon 3, their assigned gene prefixes, and numbers of sequences per species or per individual.

aCommon names and their scientific names for the Order Crocodylia in brackets.bNC in brackets indicates the number of clone inserts sequenced from which number of sequences within each species (NS) were identified. The NS values also include pseudogenes, and are discussed in the results section.cSPI indicates number of sequence(s) per individual with the number of individuals (N) examined in brackets. The SPI and N values are discussed in the results section.dNot applicable due to unsuccessful results from a process of cloning.eZero means none of the sequences observed in an individual after eliminating sequence artefacts described below.