Table 2

Phenotypic characteristics facilitating the classification and differentiation of the lymnaeid snails species present in the fascioliasis hyperendemic area in Cajamarca
Characteristics G. truncatula L. neotropica L. schirazensis
Shell:
- maximum length 12.00 mm 10.36 mm 8.06 mm
- whorls stepped convex regularly convex
- columella folded slightly curved and unfolded straight
Living specimens:
- Tentacles wider and with a wide base * elongate, slender and with a narrow base
- Eyes small * big and larger
- Colour mantle roof shows larger unpigmented whitish spots giving a pale appearance to the shell of living specimens by transparency * mantle roof from dark brown to blackish throughout, with unpigmented white-greyish round spots, giving a dark appearance to the shell by transparency
Anatomy:
- Praeputium/penis sheath length ratio 2.50-5.90 mm (mean 3.44 mm) 1.10-3.90 mm (mean 2.12-2.70 mm) 1.20-2.23 mm (mean 1.60 mm)
- Radula first bilateral teeth tricuspid first bilateral teeth bicuspid but occasionally tricuspid or rarely quadricuspid first bilateral teeth mostly bicuspid
Egg clusters:
- Cluster shape rounded to oval shape even when containing more eggs rounded to oval when containing few eggs and lengthening with slightly curved trend when including more eggs kidney- to banana-like, the more curved, elongated and narrow the more numerous are the eggs inside
- Egg number/cluster usually 2-15 around 4-16 around 6-14
Ecology:
- amphibious/terrestr ++ ++ +++ (terrestrial trend)
- anthropophyly +++ + ++
Transmission Capacity:
- to humans +++ + -
- to animals +++ +++ -

Data from Bargues et al. [42,50], and Khoubbane et al. (unpublished data). Intraspecific variability in lymnaeids of the Galba/Fossaria group, to which the three species found in Cajamarca belong, is known to be very wide and, thus, characteristics noted in this table should be considered only orientiative. * = comparison in living specimens never performed.

Bargues et al.

Bargues et al. Parasites & Vectors 2012 5:174   doi:10.1186/1756-3305-5-174

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