The Pareado (Spanish-paired) is a distich originating in Galician-Portuguese, 12th century, Spain. It is simply a didactic rhymed couplet often used for proverbs or epigrams. It can also be used as a two line chorus called a Cosanta which follows other narrative couplets.
The Pareado / Cosanta is:
a single distich, a poem in 2 lines.
syllabic, often the same length at the discretion of the poet.
rhymed, the rhyme can be consonant rhyme which in Spanish prosody is full rhyme or the rhyme can be assonant rhyme.
When used as a chorus, the Cosanta, the syllable count and rhyme should be different from the couplets that develop the subject, the Cosanta or chorus acts as feedback to the unfolding narrative.
Pasted from http://www.poetrymagnumopus.com/index.php?showtopic=1929
My thanks to Judi Van Gorder for years of work on this fine PMO resource.