Abstract
Malformations in animals have long been known. In gastropod, natural and induced malformations are mentioned in different systems and in ocular tentacles, mainly linked to cases of parasitism and exposure to pollutants (molluscicides and chemicals). In this study we present a new malformation not documented in the ocular tentacles of slug Deroceras reticulatum that could be due to the action of pesticides. This malformation in D. reticulatum is the first malformation to be mentioned for South America in nursery gardens.
Highlights
Malformations in animals have been cited in several cases, in gastropod molluscs, mainly linked to cases of parasitism and exposure to pollutants
In the framework of identifying pathways of dispersion of invasive slugs in commercial nursery gardens in Buenos Aires province (Argentina), we present the first report of ocular tentacle malformation for Deroceras reticulatum (Müller, 1774)
The origin of Deroceras reticulatum is believed to be Europe (Wiktor, 1996) and currently has a worldwide distribution and is a pest for some plant species as well as vector of various harmful parasitic organisms for both humans and other animals (Berg, 1997). This specimen of D. reticulatum has a malformation, in which the ocular tentacles are fused along their entire length, giving the appearance of presenting a single ocular tentacle
Summary
Malformations in animals have been cited in several cases, in gastropod molluscs, mainly linked to cases of parasitism and exposure to pollutants (molluscicides and chemicals). Among the natural anomalies observed are: a simple tentacle with a central cephalic position (Wächtler, 1929; Chetail, 1958; Jackiewicz, 1969), two tentacles arising from the same base (Techow, 1910; Hofmann, 1912), partially fused tentacles located in the center of the head (Römer, 1903) or bifurcated tentacles (Jackiewicz, 1969; Jackiewicz et al, 1998).
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