Pseudorygmodus versicolor, FIKÁýEK & VONDRÁýEK, 2014

FIKÁýEK, Martin & VONDRÁýEK, Dominik, 2014, A review of Pseudorygmodus (Coleoptera: Hydrophilidae), with notes on the classification of the Anacaenini and on distribution of genera endemic to southern South America, Acta Entomologica Musei Nationalis Pragae 54 (2), pp. 479-514 : 506

Pseudorygmodus Hansen, 1999

Known distribution. The genus contains two species – the widespread P.flintispangleri ( Moroni, 1985) and P.versicolor sp. nov., known from a single locality in Parque Nacional Nahuelbuta (La Araucanía Region). The complete list of known specimens and localities is provided above in the review of the genus; same data were used for the model of the potential distribution of the genus.

Results of the model of the potential distribution. Number of occurrence points analyzed: 11. Training AUC: 0.922. Treshhold for equal training sensitivity and speci¿city: 0.448. Most contributing climatic layers: bio19 – precipitation in coldest quarter of the year (75 %).

Potential distribution. In the north, the genus may potentially reach the Bío-Bío Region along the Andes Mts. and the northern border of the Los Lagos Region (incl. whole Chiloé island) along the coastal mountain range. In the coastal mountain range, an isolated spot of potential distribution is predicted for the Cordillera de Nahuelbuta, from where P. versicolor is here described. South of the Los Lagos Region, the potential distribution includes coastal areas reaching the southernmost parts of the Magellanes Region. Climatically suitable conditions are also predicted in small isolated spots at high altitudes along the Chilean-Argentinian border north of Region Maule, but these regions were massively affected by glaciation during the Pleistocene, hence, actual distribution there seems less probable. In the northern part of the continual potential distribution, it generally corresponds with the distribution of Valvidian/ Nothofagus forests.

Biology. Associated with streams and rivers, most likely to be found in mosses on stones above water, in flood debris accumulated in logjam and on humid places on the banks of the streams. In the south, also likely inhabiting humid places far from streams/rivers. See above for details for each species, and Discussion for more details on supposed habitat differences between species.