Tag Archives: thaumastus

Lubomirski collection

Ladislas Lubomirski (1824-1882), a Polish nobleman, had an interest in natural history and contributed to Neotropical malacology. He wrote only one paper on Peruvian land shells (Lubomirski, 1880), which was based on collections made by K.R. Jelksi (1837-1896) and J. Stolzmann (1854-1928, also written as Sztolcman); they travelled through that country in 1870-1874 and 1875-1878 respectively. The shells collected during their trips are kept in Lubormirski’s collection, which is in the Warsaw museum.

In Lubomirski’s paper, several new species are described, two of which belong to the Orthalicoidea: Bulimus (Orphnus) jelskii and Bulimus (Porphyrobaphe) wrzesniowskii. Dominika Mierzwa-Szymkowiak (Museum i Instytut Zoologii) kindly located the type specimens for me and made some photographs. For completeness sake I have also made copies of the original figures.

The first species is now classified as Thaumastus (Scholvienia) jelskii; it was described from Dept. Junín, near Tarma, Amable Maria (-11.168462 S, -75.355516 W). Weyrauch (1964) redescribed this taxon on the basis of new material from the same region. According to his data this species occurs at 1400-1800 m; it may be closely related to species living at higher altitudes, e.g. T. (S.) tarmensis (Philippi, 1867).

The labels show that Lubomirski was in correspondence with Crosse, who considered this shell as a novel species. The green label has Lubomirski’s handwriting.

The second species, described by Lubomirski from “Tambillo”, is now classified as Sultana (Metorthalicus) wrzesniowkii. The type locality, however, is somewhat puzzling as there are several localities of that name in different parts of Peru. Without further knowledge of localities where Stolzmann, who was an ornithologist, collected birds, it will remain difficult to pinpoint this place. In the original figure the top of the shell seems to be missing in the ventral view. However, the label leaves no doubt that this is the (single) specimen which Lubomirski had at hand.

References:
Lubomirski, L. (1880) Notice sur quelques coquilles du Pérou. – Proceedings of the Zoological Society of London 1879: 719-728.
Weyrauch, W.K. (1964). Nuevos gastropodos terrestres y nuevos sinonimos de Sudamerica, II. – Acta zoologica Lilloana 20: 33-60.

Second record for Thaumastus caetensis

Vasconcelos & Pena (2012) recorded the second specimen known for the rare Brazilian snail Thaumastus caetensis Pena, Salgado & Coelho, 2011. The specimen was found in de Serra da Piedade, Caet??, Minas Gerais and its presence in a protected area is important. This species is probably restricted to the ‘campos rupestres’ habitat. The (subadult) specimen was found alive, but preserved in formalin, which makes it unsuitable for DNA research. 

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Reference:
Vasconcelos, M. & Pena, P., 2012. Range extension of Thamastus caetensis  Pena, Salgado & Coelho, 2011 (Gastropoda: Orthalicidae: Bulimulinea) in the highlands of Minas Gerais, southeastern Brazil. – CheckList 8(3): 534-536. Available at http://www.checklist.org.br/archive

Photo of the day (138): Thaumastus

This picture was taken during bird-watching in the Jorupe Reserve in southern Ecuador. This Fundación Jocotoco reserve on the border of Ecuador and Peru, consists of Tumbesian dry tropical forest. On one of the trees this large species was spotted, which bears some resemblance to Lissachatina fulica. Fortunately, this is not the case; it is a Thaumastus species, which is difficult to identify without additional pictures.

Anyway, a nice picture of a beautiful snail from an interesting locality.

Thanks to Kate Richardson for sharing!

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New Thaumastus

A paper with a description of a new Thaumastus species from southern Brazil has just been published (Colley, 2012).

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It describes a new species from Paran??, S??o Jos?? dos Pinhais e Guaratuba, Hydro-electric Powerplant Guaricana, Thaumastus straubei n.sp., for which also the anatomy (mandibula, radula and genitalia) is described. The holotype is in the Rio de Janeiro museum (MNRJ 11890).

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Reference:

Colley, E., 2012. Nova esp??cie de Thaumastus da Floresta Atl??ntica do Paran??, Brasil (Mollusca, Gastropoda, Pulmonata, Bulimuloidea). – Iheringia 102: 43-47.

Traveling in South America (5)

The last stop on my trip was Peru, where I especially followed the ‘Gringo Trail’ (Arequipa, Puno, Cuzco). In the latter area I visited some of the touristic highlights, e.g. Machu Picchu and the ‘Holy Valley’ (R??o Urubamba valley).

Some of my old localities (1975) were revisited and the same species were still abundantly present. E.g., near Pisac Bostryx spiculatus (Morelet, 1860) was observed on vertical rock-faces near the road. 

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Just opposite Urubamba Bostryx tubulatus (Morelet, 1860) was observed in xerophytic vegetation, hibernating on dead twigs and on small bushes.

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Near Ollantaytambo Bostryx cf. virgultorum (Morelet, 1863) was found among boulders on a slope with xerophytic vegetation, under and near stones.

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Finally, near Aguascalientes a – yet unidentified – Thaumastus species was found aside a path.

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New taxa (28): Thaumastus

In a recent issue of Zoologia (formerly Revista Brasileira de Zoologia) a paper appeared with new taxa of Orthalicidae (Pena et al., 2011).

Two new species of Thaumastus (Thaumastus) from the state of Minas Gerais, southeastern Brazil, are described. They are diagnosed and characterized by the morphology of the shell and soft parts and compared with Brazilian species of the subgenus Thaumastus s.s. Martens, 1860. 

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Thaumastus (T.) parvus sp. nov. is similar to T (T.) baixoguanduensis Pena, Coelho & Salgado, 1996 but can be distinguished by the smaller size, smaller number of plates in the jaw, different number of follicle groups in the ovotestis and form of the fertilization complex. 
Type locality: Brazil, Edo. Minas Gerais, Belo Horizonte, Serra do Curral, Mangabeiras Park. Holotype: MNRJ 8107.

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Thaumastus (T.) caetensis sp. nov. is similar to T. (T.) largillierti (Philippi, 1845) but differs by the width and the contour of the parietal side of the shell aperture. T. (T.) caetensis is also closer to Thaumastus (T.) baixoguanduensis but can be distinguished by the smaller dimensions (height, width and number of protoconch whorls), the lack of a transversal light band on the body whorl, the jaw with smaller number of plates, and the radula with 35 teeth. In the soft parts, this new species differs also in the number of follicle gatherings in ovotestis, fertilization complex with globose shape, and penian retractor muscle terminally and laterally attached to flagellum.
Type locality: Brazil, Edo. Minas Gerais, Caet??, Serra da Piedade. Holotype MNRJ 8097.

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Reference:
Pena, M., Salgado, N. & Coelho, A.C. dos Santos, 2011. Two new species of Thaumastus (Gastropoda: Pulmonata: Orthalicidae: Bulimulinae) from the state of Minas Gerais, Brazil. – Zoologia 28(4):531-537.