Table 1.

Character comparison between A. catenatus sp. nov., A. conhanungensis and A. divitopapillatus.

Characteristics	A. catenatus	A. conhanungensis 1	A. divitopapillatus 1
Length	51–54	220–350	121–126
Diameter	2.2–2.5	7–12	3–6
Segments	85–89	123–186	108–112
First dorsal pore	5/6	12/13	12/13
GM in spermathecal region	absent	numerous, vii–viii	numerous, vi–ix
GM in male region	8–10, two lines, pre- and post-setal in xviii	4–10, grouped around male pores in xviii	5–20, grouped around male pores in xviii
Septum 8/9	absent	thin	absent
Intestinal caeca	simple	lobuled	simple
Testis sacs	connected	separated	connected
Shape of ampulla	clavate	oval	oval
Seminal chamber	chained	twisted	chained

Source: ¹ = Thai (1984).