Table 1. List of selected morphometric characters used for the identification of Acantholaimus and Sabatieria species.

Code	Measurement	Acantholaimus	Sabatieria
L	Total body length (µm)	✓	✓
L′	Body length without tail	✓
Amphid D	Amphid diameter	✓	✓
OLSL	Length of outer labial setae	✓
CSL	Length of cephalic setae	✓	✓
Cerv. LS	Length of cervical setae	✓
SSL	Length of somatic setae	✓
Spic.arc	Length of spicule in the arc	✓	✓
D.A.E. A	Distance from anterior end to amphid	✓
D.L.C. S	Diameter at the level of cephalic setae	✓
D.L.M. A	Diameter at the level of the middle of the amphid	✓
D.L.C	Diameter at the level of cardia	✓
D.L. A	Diameter at the level of anus	✓
MBD	Maximum body diameter	✓
HD	Head diameter		✓
B.C. W	Buccal cavity width		✓
Amphid. H	Amphid height		✓
Amphid. AE	Amphid from the anterior end		✓
Nerv.ring	Nerve ring from the anterior end		✓
Pha.L	Pharynx length		✓
Pha.BBD	Pharyngeal bulb body diameter		✓
Gub.apoph. L	Gubernacular apophyses length		✓
Suppl. N°	Number of supplements		✓
abd	Anal body diameter		✓
TL	Tail length		✓
TL/abd	Tail length abd		✓
a, b, c	De Man’s ratios	✓	✓
a′, b′, c′	De Man’s ratios	✓	✓
V	Distance from anterior end to vulva/total body length %	✓	✓
V′	Distance from anterior end to vulva/body length without tail %	✓	✓