2 literature references for Amorphinopsis excavans excavans Carter, 1887:

Author: Annandale, N.
Year: 1915
Title: Some Sponges parasitic on Clionidae with further notes on that family.
Source: Records of the Indian Museum 11(6): 457-478,pl. XXXIV.
Author: Carter, H.J.
Year: 1887
Title: Report on the Marine Sponges, chiefly from King Island, in the Mergui Archipelago, collected for the Trustees of the Indian Museum, Calcutta, by Dr. John Anderson, F.R.S., Superintendent of the Museum.
Source: Journal of the Linnean Society. Zoology 21(127-128): 61-84, pls 5-7.