Table 2 in Morphological observations on three Baltic species of Corynosoma Lühe, 1905 (Acanthocephala, Polymorphidae)

Table 2. Morphometric characters in Corynosoma magdaleni Montreuil, 1958, C. semerme (Forsell, 1904) Lühe, 1911 and C. strumosum (Rudolphi, 1802) Lühe 1904 from grey seals, Halichoerus grypus, in the Baltic Sea presented as mean and (range). All measurements in micrometre (µm) unless otherwise noted. n = number of specimens measured is smaller than number of specimens available. * = proboscis not fully everted.
SexCorynosoma magdaleni ♀ ♂Corynosoma semerme ♀ ♂Corynosoma strumosum ♀ ♂Number of specimens6414161 1Body length (mm)4.36 (3.67–5.11)3.61 (2.53–4.39)2.50 (1.83–3.13)2.32 (1.91–2.73)4.90 5.67Fore-trunk length (mm)0.86 (0.74–0.95)0.92 (0.73–1.20)1.11 (0.77–1.49)1.00 (0.78–1.46)0.91 1.43Fore-trunk width (mm)0.58 (0.50–0.68)0.49 (0.40–0.58)0.95 (0.64–1.21)0.89 (0.72–1.04)0.58 0.99Hind-trunk length (mm)3.50 (2.86–4.37)2.69 (1.81–3.19)1.39 (0.63–1.79)1.32 (0.85–1.53)3.99 4.24Hind-trunk width (mm)0.35 (0.30–0.41)0.34 (0.26–0.46)0.68 (0.39–0.86)0.63 (0.51–0.79)0.35 0.6Trunk spines length (fore-trunk)30 (20–40)32 (30–40)30 (10–50)34 (20–50)20 30Neck length165 (150–190) (n = 3)113 (n = 2)175 (90–280) (n = 10)168 (140–230) (n = 13)– 160Neck width221 (210–240) (n = 3)153 (110–190) (n = 2)314 (240–410) (n = 10)262 (230–300) (n = 13)– 350Proboscis length[306 (250–360)]* (n = 2)[219 (190–250)]*393 (280–510) (n = 7)472 (360–610) (n = 7)[140]* [270]*Proboscis width176 (140–200)144 (140–150)242 (180–290)226 (190–260) (n = 14)140 190Proboscis receptacle length490 (n = 1)666 (640–690) (n = 2)941 (690–1230) (n = 8)776 (630–1250) (n = 10)– 790No. of longitudinal rows of hooks18 (16–20)17 (16–20)23 (20–25)23 (22–24)20 18No of hooks in each row10 (8–11)8 (8–10)11 (10–12)12 (10–14)10 10Subdivision of hooks in each row3 (2–3) 3 (2–4) gap 4 (3–4)5 (4–6) 3 (2–3) 4 (4–5)4 2 4Hook length, anterior series30 (n = 2)38 (30–50) (n = 2)39 (20–50) (n = 9)41 (10–60) (n = 15)20 30Hook length, middle series47 (20–50)44 (40–50)59 (30–80)60 (30–80) (n = 15)30 60Hook length, posterior series29 (20–40) (n = 5)24 (20–30) (n = 2)28 (10–40) (n = 12)27 (10–40) (n = 13)20 30Genital spines length–17 (n = 3)–43 (30–50)– 20Testes length–––283 (150–400) (n = 13)– 430Testes width–––223 (140–330) (n = 13)– 190Cement glands length–88 (n = 1)–165 (90–230) (n = 12)– 150Cement glands width–50 (n = 1)–164 (100–240) (n = 12)– 170Saefftigen’s pouch length–566 (240–890) (n = 2)–214 (140–290) (n = 12)– 480Saefftigen’s pouch width–81 (60–100) (n = 2)–126 (80–210) (n = 12)– 70Bursa length–258 (160–390) (n = 3)–385 (290–510) (n = 3)– 190Bursa width–271 (160–440) (n = 3)–440 (350–490) (n = 3)– 220Egg length57 (50–60) (n=5)–91 (40–120) (n = 10)–– –Egg width17 (n=5)–27 (10–40) (n = 10)–– –