@article {1785, title = {A new species of land planarian from Madeira Portugal (Platyhelminthes, Turbellaria, Tricladida)}, journal = {Journal of Zoology}, volume = {201}, year = {1983}, month = {12/1983}, pages = {433{\textendash}443}, abstract = {

Kontikia bulbosa sp. nov. is described. The species is characterized by an intrapenial papilla, dilatations of the vasa deferentia, and a number of bulbous structures projecting from the atrial wall. K. bulbosa differs from the known representatives of its genus in that it has no annular zone of parenchymal longitudinal muscles, but only a ventral layer of these muscles. It is proposed that Froehlich\&$\#$39;s (1955) definition of the genus be adapted so that it also includes Geoplana species with only a ventral layer of parenchymal longitudinal muscles. G. mexicana Hyman, 1939 fulfills the new requirements of Kontikia and, consequently, is transferred to this genus. K. bulbosa was found on Madeira; its occurrence on this island is probably due to passive dispersal.

}, doi = {10.1111/j.1469-7998.1983.tb05069.x}, url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1469-7998.1983.tb05069.x/full}, author = {Ronald Sluys} } @article {1707, title = {Predation on snails by three species of triclad and its bearing on the distribution of Planaria torva in Britain}, journal = {Journal of Zoology}, volume = {189}, year = {1979}, month = {1979}, pages = {459 - 484}, publisher = {Blackwell Publishing Ltd}, abstract = {

Dugesia polychroa, D. lugubris and Planaria torva preyed upon snails of differing morphologies and while the Dugesia spp. fed approximately in proportion to snail abundance, PL torva was more selective on Potamopyrgus jenkinsi. The incidence of feeding on four snail taxa by the Dugesia spp. was significantly correlated and differed strikingly from that of PI. torva where feeding was related to its annual life cycle. Large peaks of feeding coincided in the Dugesia spp. for the four snail types; this was attributed to snail vulnerability being increased by environmental disturbance. Comparison of feeding by Dugesia spp. in the presence and absence of PI. torva indicated that severe competition was occurring for food with PI. torva having a food refuge in P. jenkinsi. The distribution of PI. torva in Britain is largely confined to productive habitats in the Glasgow-Edinburgh and East Anglia regions. It is concluded that historical rather than ecological events have played the major part in its distribution to date. The strong association of PL torva with port areas and the canal system suggests that it is a recent introduction via the timber trade with Fennoscania.

}, isbn = {1469-7998}, url = {http://dx.doi.org/10.1111/j.1469-7998.1979.tb03974.x}, author = {Reynoldson, T. B. and Piearce, Bronwen} } @article {JZO:JZO609, title = {Morphological and biochemical variation in populations of Dugesia (G.) tigrina (Turbellaria, Tricladida, Paludicola) from the western Mediterranean: biogeographical and taxonomical implications}, journal = {Journal of Zoology}, volume = {218}, number = {4}, year = {1989}, pages = {609{\textendash}626}, publisher = {Blackwell Publishing Ltd}, abstract = {

Dugesia (Girardia) tigrina is a Nearctic freshwater triclad native to North America, now amply distributed in most European countries as the result of a reportedly unique introduction into north-west Europe early this century and its dispersal southwards and eastwards in the last decades. All European populations described so far are externally spotted, with a pigmented pharynx, and, apart from two sexual populations recently described in England, they are fissiparous. This uniformity contrasts with the variability reported in its native area, thus supporting the hypothesis of a single introduction. However, thorough morphological, karyological and biochemical comparative studies of European populations have never been properly done.We have undertaken such a study comparing 24 populations present in a restricted area of the western Mediterranean. The results show an unexpectedly ample variation in external and pharyngeal pigmentation patterns, the presence of sexually reproducing populations, and ample variation in their biochemical patterns as revealed by isoelectric-focusing. This is an indication that European Dugesia (G.) tigrina is far more diverse than previously thought, suggesting that several, independent introductions from its native area have recently occurred, and the implications of these findings in biogeographical and taxonomic terms are discussed.

}, issn = {1469-7998}, doi = {10.1111/j.1469-7998.1989.tb05003.x}, url = {http://dx.doi.org/10.1111/j.1469-7998.1989.tb05003.x}, author = {Maria Ribas and Marta Riutort and Jaume Bagu{\~n}{\`a}} } @article {JZO:JZO99, title = {The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Platyhelminthes: Turbellaria) in Britain}, journal = {Journal of Zoology}, volume = {157}, number = {1}, year = {1969}, pages = {99{\textendash}123}, publisher = {Blackwell Publishing Ltd}, abstract = {

Planaria torva was described originally by O. F. M\üller in 1774 under the generic name Fasciola. The synonyms arising since have been critically evaluated and the many varied morphological descriptions of this species are reviewed. The identity of this species in Britain has been confirmed by detailed examination of external and internal anatomy and it is shown that Planaria torfrida, described from Britain by Perkins (1928), is a synonym of Planaria torva. Dugesia lugubris (Schmidt, 1862) is the species most likely to be confused with Planaria torva and convenient methods of separating these species are described. The validity of all available British records has been examined and new localities described. Planaria torva occurs in England, Scotland and Ireland but has a markedly discontinuous distribution. There are real concentrations of habitats in the Edinburgh and Glasgow areas where the species also forms a larger proportion of the triclad population than usual. The species is markedly eurytopic and occurs in a wide range of lotic and lentic habitats, although most of them are calcium rich by British standards. It is not yet possible to offer a sound explanation for these facts because the ecology of Planaria torva is insufficiently known.

}, issn = {1469-7998}, doi = {10.1111/j.1469-7998.1969.tb01691.x}, url = {http://dx.doi.org/10.1111/j.1469-7998.1969.tb01691.x}, author = {Ball, Ian R. and Reynoldson, T. B. and Warwick, T.} } @article {643, title = {A new genus and species of freshwater planarian from Australia (Platyhelminthes: Turbellaria)}, journal = {Journal of Zoology}, volume = {174}, number = {2}, year = {1974}, month = {10/1974}, pages = {149-158}, abstract = {

A new genus and species of freshwater planarian is described from Australia. Its taxonomic affinities are discussed and a synopsis of the known genera of freshwater triclads of Australia is provided.

}, doi = {10.1111/j.1469-7998.1974.tb03148.x}, url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1469-7998.1974.tb03148.x/abstract}, author = {Ian R. Ball} } @article {362, title = {On the taxonomic status of Dugesia gonocephala and Dugesia subtentaculata (Turbellaria, Tricladida, Paludicola)}, journal = {Journal of Zoology}, volume = {209}, year = {1986}, pages = {43-59}, abstract = {

The taxonomic status of Dugesia (Dugesia) gonocephala (Dug\ès, 1830), the type-species of the genus Dugesia Girard 1850, and the closely related species Dugesia (Dugesia) subtentaculata (Draparnaud, 1801) have never properly been assessed. Dugesia subtentaculata has usually been regarded as a synonym of D. gonocephala, especially for its asexual races. In order to assess the status of the two species, studies have been carried out on material from the surroundings of Montpellier, southern France, from which the type-material of the two species originated. It is concluded that both are valid taxa and neotypes have been designated. Dugesia gonocephala is the common European species, whereas D. subtentaculata has a specifically Mediterranean distribution. Dugesia iberica Gourbault \& Benazzi, 1979, originally described from Spain and Mallorca, is conspecific with this latter species. The morphological and karyological characteristics of the two species and of several fissiparous races belonging to the subgenus Dugesia are discussed.

}, doi = {10.1111/j.1469-7998.1986.tb03565.x}, url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1469-7998.1986.tb03565.x/abstract}, author = {Elizabeth J. De Vries} }