Arnium macrotheca
(P. Crouan & H. Crouan) N. Lundq.
TRTC 40982. Place of collection: México; San Luis Potosí; Ciudad del Maiz. Date of collection: 19 August 1960. Associated organism: Equus sp. (dung). Collector: Cain, R.F.. Identifier: Jeng, R.S.; Krug, J.C..