صورة الغلاف

Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia

A total of 24 species from 21 genera in 14 families sampled from 19 locations in Peninsular Malaysia were identified by looking at their shell morphological characteristics and compared with voucher specimens in Natural History Museum, London. All the specimens were successfully sequenced based on t...

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محفوظ في:
التفاصيل البيبلوغرافية
المؤلف الرئيسي: Bakar, Siti Balkhis Abu
التنسيق: أطروحة
اللغة:English
منشور في: 2013
الموضوعات:
QH1-278.5 Natural history (General)
الوصول للمادة أونلاين:http://eprints.usm.my/46307/1/Siti%20Balkhis%20Abu%20Bakar24.pdf
http://eprints.usm.my/46307/
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id my.usm.eprints.46307
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spelling my.usm.eprints.46307 http://eprints.usm.my/46307/ Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia Bakar, Siti Balkhis Abu QH1-278.5 Natural history (General) A total of 24 species from 21 genera in 14 families sampled from 19 locations in Peninsular Malaysia were identified by looking at their shell morphological characteristics and compared with voucher specimens in Natural History Museum, London. All the specimens were successfully sequenced based on the double amplification of rRNA genes that comprised of the conserved and variable regions (5.8S gene, the complete ITS-2 region and the large subunit 28S gene). These Malaysian taxa sequences were then analyzed together with available 179 Stylommatophoran data based on 844 bp sequences to investigate their phylogenetic relationships. Both Neighbour-Joining (NJ) and Maximum Likelihood (ML) phylogenetic trees remained monophyletically, supported (as in previous analysis) with the splitting into ‘achatinoid’ and ‘non-achatinoid’ clades (40% and 100% in NJ and ML bootstrap values, respectively) with the Malaysian inclusion. The ‘achatinoid’ clade had four distinct and stable clusters’ namely (1) Plectopylidae, (2) Streptaxidae and Diapheridae (Streptaxoidea), (3) Ferussaciidae, and (4) a lineage that includes Subulinidae, Achatinidae, Coeliaxidae and Thyrophorellidae. From the seven major groups in the ‘non-achatinoid’ clade, the taxonomic status of Helicoidea, Orthalicoidea, Elasmognatha and Orthurethra remained unresolved as no additional or only a single representative taxon was obtained in the present study. However, groups within the Limacoidea, Clausilioidea and Arionoidea taxa require further investigations that may lead to taxonomic revisions. 2013-12 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/46307/1/Siti%20Balkhis%20Abu%20Bakar24.pdf Bakar, Siti Balkhis Abu (2013) Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia. Masters thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic QH1-278.5 Natural history (General)
spellingShingle QH1-278.5 Natural history (General)
Bakar, Siti Balkhis Abu
Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia
description A total of 24 species from 21 genera in 14 families sampled from 19 locations in Peninsular Malaysia were identified by looking at their shell morphological characteristics and compared with voucher specimens in Natural History Museum, London. All the specimens were successfully sequenced based on the double amplification of rRNA genes that comprised of the conserved and variable regions (5.8S gene, the complete ITS-2 region and the large subunit 28S gene). These Malaysian taxa sequences were then analyzed together with available 179 Stylommatophoran data based on 844 bp sequences to investigate their phylogenetic relationships. Both Neighbour-Joining (NJ) and Maximum Likelihood (ML) phylogenetic trees remained monophyletically, supported (as in previous analysis) with the splitting into ‘achatinoid’ and ‘non-achatinoid’ clades (40% and 100% in NJ and ML bootstrap values, respectively) with the Malaysian inclusion. The ‘achatinoid’ clade had four distinct and stable clusters’ namely (1) Plectopylidae, (2) Streptaxidae and Diapheridae (Streptaxoidea), (3) Ferussaciidae, and (4) a lineage that includes Subulinidae, Achatinidae, Coeliaxidae and Thyrophorellidae. From the seven major groups in the ‘non-achatinoid’ clade, the taxonomic status of Helicoidea, Orthalicoidea, Elasmognatha and Orthurethra remained unresolved as no additional or only a single representative taxon was obtained in the present study. However, groups within the Limacoidea, Clausilioidea and Arionoidea taxa require further investigations that may lead to taxonomic revisions.
format Thesis
author Bakar, Siti Balkhis Abu
author_facet Bakar, Siti Balkhis Abu
author_sort Bakar, Siti Balkhis Abu
title Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia
title_short Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia
title_full Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia
title_fullStr Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia
title_full_unstemmed Biodiversity And Phylogenetic Studies Of Land Snails (Pulmonata: Stylommatophora) In Peninsular Malaysia
title_sort biodiversity and phylogenetic studies of land snails (pulmonata: stylommatophora) in peninsular malaysia
publishDate 2013
url http://eprints.usm.my/46307/1/Siti%20Balkhis%20Abu%20Bakar24.pdf
http://eprints.usm.my/46307/
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score 13.250246

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