期刊
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
卷 193, 期 1, 页码 250-280出版社
OXFORD UNIV PRESS
DOI: 10.1093/zoolinnean/zlaa129
关键词
biogeography; cladistic analysis; homoplasy; molecular systematics; phylogenetics; plesiomorphy; Southeast Asia
类别
资金
- 2020 Postdoctoral Scholarship, Rachadapisek Sompote Endowment Fund, Chulalongkorn University
- Thailand Research Fund [TRF-DPG628001]
- TRF Strategic Basic Research [DBG 6080011]
- Center of Excellence on Biodiversity [BDC-PG2-161002]
- Universiti Malaysia Sabah [GKP0011STWN-2016]
- RECOLNAT, MNHN, Paris [ANR-11-INBS-0004]
Members of the terrestrial snail family Dyakiidae from Southeast Asia exhibit distinct geographical distribution patterns and varying degrees of complexity in their amatorial organ gland. A new genus and species, Pseudoquantula lenticularis, was discovered, and mainland Southeast Asia was identified as the ancestral range of Dyakiidae. The study also found that all 14 morphological characters used were homoplastic, and the enigmatic genus Pseudoplecta exhibited secondary loss of the amatorial organ gland.
Members of the terrestrial snail family Dyakiidae from Southeast Asia show a distinct geographical distribution pattern and possess different degrees of complexity in their amatorial organ gland. This study is the first molecular phylogeny of ten of the 12 genera in this family, performed to provide insights into the origin of Dyakiidae and the evolution of their shells and amatorial organ gland structure. A new genus and new species, Pseudoquantula lenticularis Jirapatrasilp & Panha gen. & sp. nov., was uncovered based on its distinct morphological characters and molecular divergence. All other genera were retrieved as monophyletic except for Dyakia. Mainland Southeast Asia was inferred to be the ancestral range of the Dyakiidae, and the lineages then dispersed to and diversified in Borneo. Cladistic analysis showed that all 14 morphological characters used in this study were homoplastic. These results disagree with the previous amatorial organ transformation series, in which neither Pseudoplecta nor Quantula was ancestral to the other genera. The enigmatic genus Pseudoplecta, which lacks an amatorial organ gland, exhibited secondary loss.
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