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1
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Morphological variation in terrestrial slug Deroceras turcicum (Simroth, 1894) and a northern extension of its range in Central Europe

100%
Reise H., Hutchinson J. M. C.
Folia Malacologica
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2001
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tom 09
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nr 2
We report seven new localities of the terrestrial slug Deroceras turcicum (Simroth), including the first occurrences in the Czech Republic and Slovakia. These demonstrate that the distribution of D. turcicum extends much further north than known previously and it might even be rather common there. We discuss possible reasons for its belated discovery. D. turcicum might have often been confused not only with the common D. reticulatum (O.F. Müll.) but also with the syntopical D. rodnae Grossu et Lupu and D. praecox Wiktor. We describe its variability in size, coloration, genital morphology, and caecum length, and consider characters for its reliable discrimination from other species. Two colour morphs (white and violet) are described for the first time. Intriguingly, the coloration of D. turcicum often matches that of congeners found at the same site, which suggests that colour has some selective value. Since external appearance often gives no reason to suspect that two species co-occur at a site, dissection of several specimens is advisable.
2
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An invasion from Germany: Deroceras invadens (Pulmonata: Agriolimacidae) and other synanthropic slugs in the southwest corner of Poland

100%
Hutchinson J. M. C., Reise H.
Folia Malacologica
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2015
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tom 23
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nr 4
3
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Repetition and repeatability of mating behaviour in the slug Deroceras panormitanum

81%
Hutchinson J. M. C., Tanghari I., Reise H.
Folia Malacologica
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2010
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tom 18
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nr 3
4
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First records of the terrestrial slug deroceras turcicum (Simroth, 1894) in Poland

81%
Reise H., Hutchinson J. M. C., Forsyth R. G., Forsyth T. J.
Folia Malacologica
|
2005
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tom 13
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nr 4
Deroceras turcicum (Simroth) is reported from six woodland sites aroundWa³brzych in southwest Poland. This extension of the species’ range to Poland was expected given the number of reports from adjacent areas of the Czech Republic. We collate these reports as well as local records of Deroceras praecox Wiktor, which is found in similar habitats. We briefly discuss the difficulty of distinguishing D. turcicum from Deroceras reticulatum (O. F. Müll.), with which it may also co-occur.
5
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Deroceras panormitanum and congeners from Malta and Sicily, with a redescription of the widespread pest slug as Deroceras invadens n. sp.

81%
Reise H., Hutchinson J. M. C., Schunack S., Schlitt B.
Folia Malacologica
|
2011
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tom 19
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nr 4
The name Deroceras panormitanum is generally applied to a terrestrial slug that has spread worldwide and can be a pest; earlier this tramp species had been called Deroceras caruanae. Neither name is appropriate. The taxonomic descriptions apply to a species from Sicily and Malta. This true D. panormitanum and the tramp species are distinct in morphology and mating behaviour. For instance, the penial caecum of D. panormitanum is more pointed, everting faster at copulation. The size of the penial lobe varies considerably In preserved specimens but is always prominent at copulation. D. panormitanum is distinct from the Maltese endemic Deroceras golcheri, but a phylogeny based on mtDNA COI sequences implies that they are more closely related than is the tramp species. D. golcheri has a still closer counterpart on Sicily, but we leave the taxonomy of this “species X” unresolved. In interspecific crosses, D. panormitanum may transfer sperm to the partner’s sarcobelum whereas the partner fails to evert its penis (D. golcheri) or to transfer sperm (the tramp species). Names previously applied to the tramp species originally referred to D. panormitanum or are otherwise invalid, so it is here formally redescribed as D. invadens. Deroceras giustianum Wiktor, 1998 is synonymised with D. panormitanum.
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First records of the terrestrial slug Arion ater s. l. (Linnaeus, 1758) (Pulmonata: Arionidae) from Turkey

61%
Reise H., Arslangundogdu Z., Schlitt B., Hutchinson J. M. C., Hizal E., Bacak E.
Folia Malacologica
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2018
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tom 26
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nr 4
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