Complex sentence: One other trill has been reported: epiglottal consonants are often allophonically trilled, and in some languages the trill is the primary realization of the consonant.
Split into simpler sentences: One other trill has been reported, and epiglottal trill. Epiglottal consonants are often allophonically trilled, and in some languages the trill is the primary realization of the consonant.