Some scholars also allow for a labiovelar coda . Compare the alternative development of the Proto-Greek labiovelar in Ionic (). It expresses the Primitive Irish labiovelar phoneme. The argument is that PIE had only two series, a simple velar and a labiovelar. The most common labiovelar consonant is the voiced approximant . Labiovelar may also be realised as bilabial . A few ancient Indo-European languages like Latin had labiovelar consonants. Labiovelar sounds occur as alternatives to labiopalatal sounds and may also be pronounced . The voiced labiovelar approximant is a realization of between vowels other than the schwa. A labiovelar medial is also widely accepted, with some syllables having both medials. The co-articulated labiovelar plosives and are marginal and only occur in ideophones.