Table 1.

Measurements of Gastrocotyle trachuri van Beneden & Hesse, 1863 from various localities

Host	Trachurus trachurus	T. capensis	T. mediterraneus	T. novaezelandiae	Decapterus sp.	T. trachurus
Locality	SW Mediterranean, off Algeria	SE Atlantic, off Namibia	Central Mediterranean, off Montenegro	SE Pacific, off Australia, the Tasman Sea	Western Indian Ocean, off India	NE Atlantic, off Plymouth
Source	Present study	Piasecki (1982)	Radujkovic & Euzet (1989)	Lebedev (1968)	Pillai (1968)	Jones (1933)
Body length	2,370–3,675 (3,040; n = 13)		2,000–3,000	2,690–5,030	2,200–3,100	4,700
Haptor length	1,620–2,770 (2,140; n = 13)
Body width	610–1025 (775; n = 14)		1,000	560–730	500–750	1,200
Clamp number	30–40 (35; n = 16)	33	25–40	20–24	22–30	32–40
Clamp length	60–75 (65; n = 16)	70–100	50–70a	60–80	45–50	80a
Clamp width	38–58 (45; n = 14)	55–77		50–60	60–75
Postero-lateral hooks length	16–20 (18; n = 15)	25	10	17–19	18–20
Hamulus length	35–52 (46; n = 9)	58	50	42–53	42–45
Posterior hooks length	20–26 (23; n = 22)		20	21–24	22–25
Prohaptoral sucker length	22–33 (27; n = 10)					23
Prohaptoral sucker width	26–39 (31; n = 8)					15
Pharynx length	34–54 (43; n = 8)					46
Pharynx width	30–50 (38; n = 7)					30
Distance genital atrium to anterior extremity	185–385 (250; n = 22)				120–250
Genital atrium length	25–30 (28; n = 22)	16a		14–43	30–35	23a
Genital atrium width	22–33 (27; n = 22)			10–30	35–35
Number of atrial hooks	12 (n = 26)	12	12	16	12	12
Atrial hooks length	18–19 (18; n = 26)		20	14	12–20
Number of testes				10–11
Egg length	270–315 (283; n = 10)	250
Egg width	65–90 (78; n = 10)

Abbreviations: NE, North-Eastern; SE, South-Eastern; SW, South-Western.

^aDiameter.