Complex sentence: The phonological peculiarities proposed in the glottalic theory would be best preserved in the Armenian and the Germanic languages, the former assuming the role of the dialect which remained "in situ" and implied to be particularly archaic in spite of its late attestation.
Split into simpler sentences: The phonological peculiarities proposed in the glottalic theory would be best preserved in Armenian and the Germanic languages. Armrnian remained "in situ" and would be particularly archaic despite of its late attestation.