Table 1 Morphometric comparison of present specimen and previously described forms of Mesocoelium sociale

Host

Bufo melanostictus

Kaloula pulchra

Bufo asper

Duttaphrynus melanostictus

Bufo regularis

Locality

India

Chiang Mai, Thailand

Malaysia

India

Egypt

Body L.

2.8–3.5 mm

2.6–3.4 mm

1.8–2.7 (2.38) mm

760–790 (775) μm

776.7–2807.9 (2039.9) μm

Body W.

0. 7–0.72 mm

0.5–0.74 mm

600–688 (644) μm

200–240 (220) μm

434.2–897.5 (730.5) μm

Oral sucker L.

0.275–0.34 mm

0.21–0.32 mm

200–225 (213) μm

221–432 (437) μm

115.6–283.6 ( 214.8) μm

Oral sucker W.

0.27–0.32 mm

0.27–0.31 mm

215–260 (236) μm

213–232 (329) μm

138.3–312.3 (221.6) μm

Ventral sucker L. x W.

0.185–0.32 mm (diameter)

0.13–0.22 × 0.16–0.21 mm

146–175 (167) × 128–168 (134) μm

152–173 (162) × 164–171 (167) μm

81.5–192.5 (140.7) × 84.3–187.4 (132.6) μm

Preharynx

Present

Short

Short

Not observed

Not observed

Pharynx L.

0.1–0.13 mm

0.09–0.12 mm

70–105 (88) μm

134–142 (134) μm

62.3–172.2 (119.2) μm

Pharynx w.

0.065–0.098 mm

0.062–0.091 mm

93–180 (107) μm

81–92 (86) μm

68.5–224.8 (141.9) μm

Oesophagus L.

Median length

0.22–0.79 mm

28–75 (46) μm

Very short or absent, 10–12 (11) μm

16.8–163.7 (72.4) μm

Right testis L.

0.17–0.24 mm

0.14–0.23 mm

128–182 (160) μm

131–164 (213) μm

59.2–221.2 (140.5) μm

Right testis W.

0.15–0.23 mm

0.11–0.22 mm

125–150 (136) μm

126–143 (197) μm

59.4–179.1 (122.7) μm

Left testis L.

Same

0.14–0.22 mm

140–165 (148) μm

Same

66–220.3 (154.6) μm

Left testis W.

Same

0.12–0.25 mm

118–148 (139) μm

Same

58.8–218.6 (133.1) μm

Ovary L.

0.18–0.22 mm

0.14–0.23 mm

145–195 (168) μm

150–165 (157) μm

41.5–191 (122.5) μm

Ovary W.

0.17–0.18 mm

0.17–0.24 mm

125–180 (157) μm

120–136 (128) μm

70.5–164.2 (127.9) μm

Eggs L.

31–33 μm

31–39 μm

32–43 (37) μm

10–20 (15) μm

32.8–35.6 (34.1) μm

Eggs W.

20–23 μm

21–24 μm

20–25 (22) μm

–

19.7–24.5 (22.5) μm