Tag Archive for: Bhutan.

Completed description of Bhutanese Tibetoradix cf. hookeri (Gastropoda, Pulmonata, Lymnaeoidea), with species-specific, environmentally induced decollation

Authors: E. Gittenberger, K. Tobgay
Basteria, 87 (2): 139-140Published:

Abstract

In two samples of Tibetoradix cf. hookeri, collected at different altitudes, the shells differ by being decollated at the highest locality and not so at the lowest. Potential decollation is hypothesized to be an adaptive character state enabling a longer lifespan at higher altitudes in the Himalaya.

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Download articleArtikel Completed description of Bhutanese <em>Tibetoradix</em> cf. <em>hookeri</em> (Gastropoda, Pulmonata, Lymnaeoidea), with species-specific, environmentally induced decollation

High diversity of Endothyrella (Gastropoda, Pulmonata, Plectopylidae) in Bhutan, with a description of four new species

Authors: E. Gittenberger, C. Gyeltshen, K. Tobgay, S. Sherub
Basteria, 86 (2): 55-71Published:

Abstract

Recent fieldwork in Bhutan resulted in the discovery of 4 endemic species of Endothyrella that are described as new to science, viz. E. barnai Gittenberger & Sherub, E. manasensis Gittenberger & Sherub, E. pterocallus Gittenberger, Gyeltshen & Tobgay, and E. trimagnipili Gittenberger, Gyeltshen & Tobgay. This results in a total of 9 Endothyrella species for Bhutan, 7 of which are not known from elsewhere. The new species are described and additional data are presented for the Endothyrella species dealt with in an earlier paper. A revised identification key for the Bhutanese species, based on shell characters, is added. The diversity in shell size and struc­ture is discussed and 4 species groups are provisionally dis­tinguished on the basis of the structure of the genital tracts.

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Download articleArtikel High diversity of <em>Endothyrella</em> (Gastropoda, Pulmonata, Plectopylidae) in Bhutan, with a description of four new species

The genera Dioryx and Cycloryx (Gastropoda, Caenogastropoda, Alycaeidae) in Bhutan, with a description of four new species

Authors: E. Gittenberger, C. Gyeltshen, K. Tobgay, S. Sherub
Basteria, 86 (2): 72-82Published:

Abstract

Samples of the genera Dioryx and Cycloryx from Bhutan are identified or described as new species. Next to the wide­spread D. urnula, 7 species of Cycloryx are recognized, 4 of which are endemic to Bhutan and new to science, viz. C. pemaledai Gittenberger & Sherub, spec. nov., C. globhu­tanus Gittenberger & Sherub, spec. nov., C. haumbiclausus Gittenberger & Gyeltshen, spec. nov., and C. sajumbiclausus Gittenberger & Gyeltshen, spec. nov. An identification key is provided for Cycloryx species. Cycloryx summus (Godwin-Austen, 1914), which was described from “Rechila Peak, Western Bhutan”, is not accepted as a Bhutanese species since its type locality is most probably in West Bengal, out­side the present borders of Bhutan.

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Download articleArtikel The genera <em>Dioryx</em> and <em>Cycloryx</em> (Gastropoda, Caenogastropoda, Alycaeidae) in Bhutan, with a description of four new species

Two high-altitude species of molluscs, new for Bhutan (Bivalvia, Sphaeriidae – Gastropoda, Lymnaeidae)

Authors: E. Gittenberger, K. Tobgay, C. Gyeltshen, H. Nesemann
Basteria, 85 (1): 13-17Published:

Abstract

Pisidium stewarti and Tibetoradix cf. hookeri, two species that are known to occur at conditions that nowadays prevail at high altitudes, are reported from Bhutan for the first time. The records mark the southeastern border of the known recent occurrences for both species.

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Download articleArtikel Two high-altitude species of molluscs, new for Bhutan (Bivalvia, Sphaeriidae – Gastropoda, Lymnaeidae)

The families Streptaxidae and Diapheridae (Gastropoda, Pulmonata) in Bhutan, with notes on some species occurring in Nepal and North-east India

Authors: E. Gittenberger, P. Leda, S. Sherub, C. Gyeltshen
Basteria, 85 (1): 73-81Published:

Abstract

The sister-families Streptaxidae and Diapheridae are reported from eastern Bhutan, with two and four species, respectively. The occurrence of the streptaxid Perrottetia theobaldi marks the northwestern limit of the genus Perrottetia. Gulella (Huttonella) bicolor is a widespread invasive species that might have its native range in Asia. Two of the four Sinoennea species that are reported from Bhutan, viz. Sinoennea bhucylindrica Gittenberger & Leda and Sinoennea nimai Gittenberger & Gyeltshen, are regarded as new to science. Perrottetia theobaldi, Sinoennea vara and maybe S. latens support the biogeographical link across the Brahmaputra between eastern Bhutan and the Khasi Hills in the Meghalaya state of India. Notes on three Sinoennea species occurring in the eastern Himalayan foothills, but not known from Bhutan, are added.

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Download articleArtikel The families Streptaxidae and Diapheridae (Gastropoda, Pulmonata) in Bhutan, with notes on some species occurring in Nepal and North-east India