Advanced search
Start date
Betweenand
Related content

EXPLORING THE PHYLOGEOGRAPHY AND RESOLVING THE PHYLOGENY OF AGATHISTOMA (GASTROPODA: TURBINIDAE) BY RAD-SEQUENCING: NEXT-GENERATION POPULATION GENETICS

Grant number: 18/25116-5
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): August 05, 2019
Effective date (End): August 04, 2020
Field of knowledge:Biological Sciences - Zoology - Taxonomy of Recent Groups
Principal researcher:Tito Monteiro da Cruz Lotufo
Grantee:Ana Paula Siqueira Dornellas
Supervisor abroad: Michael Hellberg
Home Institution: Instituto Oceanográfico (IO). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Research place: Louisiana State University (LSU), United States  
Associated to the scholarship:16/13503-9 - Phylogeny of the genus Agathistoma (Mollusca: Gastropoda: Tegulidae) and phylogeography of Brazilian species: genetic and morphological diversity patterns, BP.PD

Abstract

The gastropod genus Agathistoma is represented by about 20 extant species. They are relatively small in size and occur in tropical and subtropical waters of the eastern Pacific, Caribbean Sea and the South Western Atlantic. Three species of Agathistoma occur in Brazil: A. viridulum, A. hotessierianum and A. patagonicum. A. viridulum and A. hotessierianum share anti-tropical distributions but are each morphologically homogeneous across their ranges. Paradoxically, A. patagonicum is more geographically restricted but shows a high degree of morphological variation. Patterns of gene flow and genetic isolation are not known for any of these populations. The historical processes of Western Atlantic diversification may be better understood through the study of the biogeographical patterns in these species of Agathistoma. Because of their distinct distribution, previous biogeographic hypotheses, marked by disjunctions, dispersions and local extinctions, can be tested by means of their molecular footprint. In this project, we will develop a single-nucleotide polymorphism (SNP) dataset from double-digest restriction site-associates DNA (ddRAD Seq) sequencing of samples across the distribution to identify phylogeographic patters and processes affecting these species and infer phylogenetic relationships of Agathistoma based on RAD-sequencing data.KEYWORDS: Marine phylogeography, Agathistoma, phylogeny, RAD Seq, NGS.