Could this be the original Manichean Cross?:
"Those who advocate using the crucifix in the Syro-Malabar Catholic Church instead of the Mar Thoma Cross claim that the Mar Thoma Cross is actually the "Manichean Cross" a symbol of Manicheanism (a heretical early Christian sect that blended Christian and Zoroastrian beliefs and whose founder, Manichee, claimed to be the incarnation of the Holy Spirit)."
The cross has a dove above it representing the Holy Spirit. The lotus below is meant to represent the Father. The lotus in the East also represents the flowering of great beauty from the sludge and slime. Perhaps here, another symbol of the good overcoming evil and its results.
The following is about the fuss this cross has caused in the Mar Thoma Church:
"The warring factions in the Church could be described as the traditionalists and the reformists. The traditionalists maintain that the Syro-Malabar Church is a daughter-Church of the Chaldean Church with headquarters in Baghdad. They are for the adoption of the whole East Syrian (Chaldean) liturgy said to be prevalent in the Church in Kerala from the fifth century to the 16th century when the Latin Church established its sway with the advent of the Portuguese.
"According to the reformists, the traditionalists are for the removal of the crucifix and abolition of prayers like Rosary and Way of the Cross among other things and for the introduction of `Chaldean vestiges' like the Persian Cross, sanctuary veil and `Bema,' (a separate table to be placed in the front or in the middle of the aisle).
"The crucifix has disappeared from many convents which easily succumbed to the Chaldean propaganda,'' says noted religious scholar Prof. Scaria Zacharia. The crucifix, a matter of great religious and emotional attachment is being replaced by what is called the `Mar Thoma Cross'. The reformists contend that this cross is the Manichean Cross, a symbol of a heretic Church of a non-Catholic origin, which has since become defunct."