Tag Archives: peru

Peruvian inventory in Amazonia

An interesting paper appeared recently, although only as ‘advance online’ and not yet in the final paginated version. It concerns an inventory of a protected are in Peruvian Amazonia.
The abstract reads “We investigated the land snail fauna of the Panguana conservation area on the western rim of the Amazonas basin in Peru. A total of 2,322 individuals assigned to 65 land snail species were collected in 32 plots. Ten additional species were found in collections made on previous expeditions to Panguana. On the basis of avail- able data, Panguana is the most species rich locality for land snails in South America. The species density of 75 land snail species in c. 2 km2 of rather homogeneous rainforest is also high on a global scale. The land snail fauna of Panguana is characterized by a very high proportion of species belonging to the carnivorous family Scolodontidae, many of which are likely to be new to science. The fauna includes seven species that are new records for Peru, and the species Hirtudiscus sp., Xenodiscula venezuelensis, Geostilbia aperta, Guppya gundlachii and Thysanophora plagioptycha represent genera not previously recorded from the country. The synanthropic species Allopeas gracile, Opeas hannense, Subulina octona, Geostilbia aperta and Gastrocopta servilis form an ecologically distinct group that occurs mainly in sites strongly modified by humans. The presence of these species on the margin of the Amazon rainforest is evidence of the ongoing homogenization of the global fauna”.

Schermafbeelding 2019-05-03 om 09.19.04

Both the absolute number and the composition of the fauna is quite outstanding. It also shows that a thorough search by competent malacologists still can bring many new novelties for the Neotropics to the surface. Both as new records for a country and supposedly new species to science.

Reference:
Wendebourg, B. & Hausdorf, B., 2019. The land snail fauna of a South American rainforest biodiversity hotspot: the Panguana conservation area in the Peruvian Amazon. – Journal of Molluscan Studies: 8 pp. doi:10.1093/mollus/eyz014

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New Drymaeus from Peru

Just published: a paper on Peruvian Drymaeus species with description of a new species by Mogollón & Breure.

The abstract reads: “Critical remarks are made on Drymaeus species, reported from Peru in a study on land snails from National Parks at the eastern side of the Andes. Four of these species (Dry­maeus multilineatus, D. coniformis, D. glaucostomus, all known from Venezuela or Central America, and D. geomet­ricus, known from Colombia) appear to be misidentified as Peruvian species, which thus may lead to incorrect biogeographical interpretations. Correct identifications are given for all the disputed Drymaeus species. Bulimulus (Bulimu­lus) inconspicuus F. Haas, 1949, is now transferred to Dry­maeus (Mesembrinus). Additionaly, a new species, Drymae­us (Drymaeus) verecundus Breure & Mogollón, is described”.

Schermafbeelding 2019-04-07 om 11.22.00

The new species was found near Iquitos in NE Peru, and the type material has been deposited in the Brussels and Leiden museums.

Reference:
Mogollón, V. & Breure, A.S.H., 2019. Notes on Drymaeus species from Peru (Mollusca, Gastropoda, Bulimulidae), and description of a new species. – Basteria, 83: 13-18.

Photo of the day (177): Bostryx

These photos have been taken at Tambo de Viso in the Rio Rimac valley of Peru. They show Bostryx multiconspectus Breure, 2008, one of the carinated species that occurs in Andean countries. As this phenomenon, despite some examples from other parts of the world, is still poorly understood, we have conducted fieldwork several years ago. For various reasons the completion of a manuscript about this work has been delayed, but is foreseen for the near future.

Photos by courtesy of Philipp Meinecke and Nora Richter-Harder.

Photo of the day (176): Bostryx

These photos are part of a series taken at El Infernillo, Rio Rimac valley near Lima. They all depict Bostryx solutus Troschel, 1847, which shows some morphological variation at this locality. This variation is still poorly understood and may be due to ecological circumstances.

Photos by courtesy of Philipp Meinecke and Nora Richter-Harder.

Peruvian Andinia

Valentín Mogollón recently collected an Andinia species in Dept. Cajamarca, Chota Province. He identified it as Andinia taczanowski (Lubomirski, 1879). As you can see on the first photo, most specimens are decollated but some have retained their first whorls.

Always nice to see those pretty clausiliids…