Table 1.

Differential characters between Leenurina, Caputanurina and Caputanurina intermedia.

	Leenurina	Caputanurina	Caputanurina intermedia
Eye position	dorsal	dorso-lateral or lateral	dorso-lateral
PAO position	dorsal	latero-ventral or ventral	lateral
Abd. IV-V suture	as shallow inverted V	as deep inverted V	as deep inverted V
Habitus	slightly flattened	strongly flattened	flattened
Number of chaetae between the anterior line of chaetae and the posterior margin of the central plate on head	1-3+1-3<br/> in one or two rows	>3+3<br/> in several rows	3+3<br/> in two rows
Number of chaetae p between axis and S on abd. II-III	2	3	3