Table 3.

Morphological comparison among the known species of the genus Hirudinaria.

Characters	H. manillensis (Lesson, 1842)	H. thailandica sp. nov.	H. bpling Phillips, 2012	H. javanica (Wahlberg, 1856)
Ventral surface color	brick-red to brown	green to dark greenish or dark olive	dark green	green
Submarginal stripe on ventral surface	present	absent	absent	absent
Number of annuli between gonopores	5	5	5	7
Atrium	bulbous	long	bulbous	short
Ejaculatory ducts	inserted anteroventrally into atrium	inserted medially into atrium	inserted anteroventrally into atrium	inserted laterally into atrium