New cryptic species of the ‘ revolutum ’ group of Echinostoma (Digenea: Echinostomatidae) revealed by molecular and morphological data

Table 3 Comparative metrical data (in μm) for live and fixed cercariae of Echinostoma sp. IG and E. revolutum from natural infections in Radix spp. and Stagnicola palustris in Germany and Iceland

Species	*Echinostoma* sp. IG			*E. revolutum*
	Live material	Fixed material		Live material	Fixed material
	Range	Range	Mean	Range	Range	Mean
Body length	260 - 362	228 - 292	254	303 - 427	159 - 234	188
Body width (max.)	184 - 249	90 - 97	94	193 - 251	107 - 125	112
Oral sucker length	45 - 63	36 - 46	42	56 - 71	38 - 52	45
Oral sucker width	50 - 66	37 - 45	42	53 - 68	37 - 49	42
Ventral sucker length	54 - 72	43 - 54	48	63 - 83	47 - 66	55
Ventral sucker width	57 - 81	44 - 47	46	58 - 83	48 - 60	54
Pharynx length	25 - 29	16 - 25	20	27 - 36	20 - 24	21
Pharynx width	22 - 26	12 - 19	15	25 - 29	13 - 14	13
Oesophagus length	56 - 89	61 - 96	78	54 - 103	30 - 55	40
Tail length	334 - 353	296 - 378	344	364 - 417	316 - 405	367
Tail width (at base)	44 - 49	30 - 34	32	39 - 52	20 - 36	27
Tail-tip length	67 - 83	-	-	35 - 93	-	-
Proximal dorsal fin-fold length	49 - 63	50	-	41 - 153	-	-
Proximal dorsal fin-fold width	14 - 15	-	-	5 - 13	8 - 11	9
Distal dorsal fin-fold length	147 - 212	106 - 154	120	72 - 159	-	-
Distal dorsal fin-fold width	30 - 35	14 - 21	16	7 - 16	-	-
Proximal ventral fin-fold length	47 - 90	73	-	51 - 116	85	-
Proximal ventral fin-fold width	12 - 15	-	-	4 - 6	5	-
Distal ventral fin-fold length	44 - 64	41	-	74 - 202	99 - 157	125
Distal ventral fin-fold length	6 - 18	8	-	7 - 14	-	-