Tag Archives: peru

Veronicellids recharacterised

Just published: a paper by Rocha & D’ávila on the Veronicellid genera Latipes and Angustipes.

Schermafbeelding 2019-08-08 om 11.58.44

Their abstract is “The genera Angustipes Colosi, 1922 and Latipes Colosi, 1922 were originally proposed as “groups” within the genus Vaginulus Ferrussac, 1822, and since their establishment they have been variously considered valid or invalid until they gained the ultimate status of genus. The descriptions of both genera are general and broadly inclusive, and this fact has complicated taxonomic recognition. Additionally, incomplete descriptions and difficult identification of characteristics in the name-bearing type specimens demonstrate the need to revisit the species and revise the two genera. Herein, we broaden the description of Latipes erinaceus Colosi, 1922 with respect to the circulatory system, the radula, the jaw, the position of entry of the ligation duct in the bursa copulatrix in relation to the canal of the bursa, the origin of the muscle of the penial gland, along with the morphometric characteristics of the phallus, the penial gland, the pedal gland, and the bursa copulatrix. We also propose new differential diagnoses for the genera Angustipes and Latipes, limited to the essential characteristics that enable taxonomic recognition. Hence, we propose the assignment of the species L. erinaceus, Latipes rosilus (Thiele, 1927), Latipes ribeirensis (Thiele, 1927), and Latipes absumptus (Colosi, 1921) to the genus Angustipes, based on the presence of morpho- logical characteristics attributable to this genus, such as the phallus being short and conical; the bursa copulatrix being sessile or short, and lacking a head; the ligation duct inserted near the canal of the bursa; as well as on the similarity in phallus morphology with Angustipes difficilis Colosi, 1922, the type species of this genus“.

Schermafbeelding 2019-08-08 om 11.59.40

The family Veronicellidae is notoriously enigmatic due to the need to use anatomical charcters for classification. This paper is thus a welcome addition to the literature of this family.
Reference:
Rocha, C.A. & D’ávila, S., 2019. New Morphological Characterization of Latipes erinaceus (Gastropoda, Veronicellidae), Differential Diagnosis for the Genera Angustipes and Latipes, and Novel Combinations for Species of Latipes. – Zoological Science (Tokyo), 36 (3):231-241.

Advertisements

A new Peruvian Sultana

Just published: a new Peruvian species of Sultana, published by two Spanish authors, Ahuir and Torres.
Schermafbeelding 2019-07-12 om 07.17.48

The species is described from northern Peru, Dept. Piura, near Huancabamba on the border with Ecuador. Unfortunately the picture given is quite dark, but it shows the characteristic pink lip and the white inside of the aperture well enough. The holotype will be deposited in the Paris museum.
Thanks to Philippe Bouchet who sent me the paper.

Reference:
Ahuir Galindo, J. & Torres Alba, J.S., 2019. One new terrestrial gastropod species from Peru. – Malacologia Mostra Mondiale, 104: 3-4.

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

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…