Name: Christyan Lemos Bergamaschi
Type: MSc dissertation
Publication date: 28/02/2020
Advisor:

Name	Role
Yuri Luiz Reis Leite	Advisor *
Elisandra de Almeida Chiquito	Co-advisor *

Examining board:

Name	Role
Yuri Luiz Reis Leite	Advisor *
Joyce Rodrigues do Prado	External Examiner *
Elisandra de Almeida Chiquito	Co advisor *
Cecília Waichert Monteiro	External Alternate *
Aureo Banhos dos Santos	Internal Alternate *
Albert David Ditchfield	Internal Examiner *

Summary: The order Rodentia comprises the most diverse and numerous group
of mammals, having a
marked diversification in New World, mainly with the family
Cricetidae. It includes the
sigmodontine Sooretamys angouya (Sigmodontinae, Oryzomyini), the
unique species of the
genus, widely distributed in the Atlantic Forest south of the
Doce river in Brazil, northern
Argentina and eastern Paraguay. Knowing that S. angouya has
evidence of geographical
structure, the aim was to reconstruct the phylogeographic history
of the species through
population and phylogenetic inferences. DNA sequences of two
nuclear markers, pre-proinsulin 1 intron 2 and β-fibrinogen
intron 7, and two mitochondrial markers, cytochrome b and
control region were used. The population inferences indicated
absence of genetic structure in
the species, having the mitochondrial markers with higher values
of genetic diversity and
responsible for establishing the phylogeographic patterns found.
The phylogenetic inferences
recovered four main clades, but with low geographical structure,
since only one of the clades
was closely related to the geography, formed by individuals from
Paraguay. The lack of genetic
structure, absence of isolation by distance and low
phylogeographic structure suggest a
continuous and panmitic population in S. angouya.
Atlantic Forest, phylogeography, Rodentia