Tetrancistrum longiphallus ( MacCallum, 1915 ) Price, 1937

Kritsky, Delane C., Galli, Paolo & Tingbao, Yang, 2007, Dactylogyrids (Monogenoidea) parasitizing the gills of spinefoots (Teleostei, Siganidae): revision of Tetrancistrum Goto and Kikuchi, 1917, with descriptions of two new species from Siganus spp. of the Red Sea and Celebes, Journal of Natural History 41 (25 - 28), pp. 1513-1551 : 1545

Tetrancistrum longiphallus ( MacCallum, 1915) Price, 1937

This species was originally described as Diplectanum longiphallus MacCallum, 1915 (Diplectanidae) from Chaetodipterus faber (Broussonet) (Ephippidae) obtained from the New York Aquarium by MacCallum (1915). Price (1937) transferred the species to Tetrancistrum , as T. longiphallus ( MacCallum, 1915) Price, 1937 . Pearse (1949) described the species as Ancyrocephalus chaetodipteri Pearse, 1949 (Dactylogyridae) from C. faber , the synonymy of which was recognized by Yamaguti (1963). Finally, Young (1967) transferred the species to Pseudohaliotrema , but Lim (2002) and Kritsky and Galli (2007) considered it incertae sedis. Examination of the type specimens of D. longiphallus confirms that this species does not belong to any of its previously assigned genera; the species, therefore, remains a species of uncertain taxonomic position, as originally proposed by Lim (2002).