Banca de DEFESA: ANANDA CAROLINA SEREJO SARAIVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ANANDA CAROLINA SEREJO SARAIVA
DATE: 07/10/2025
TIME: 09:30
LOCAL: Google Meet
TITLE:

Integrative taxonomy of Loricariinae Catfishes in the Coastal Draingaes of Northeastern Brazil

KEY WORDS:

Neotropical, Loricariichthys, Loricaria, Caatinga, Amazonia, Cerrado, Conservation.

PAGES: 122
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Taxonomia dos Grupos Recentes
SUMMARY:

Freshwater fishes commonly known as whiptail catfish comprise the subfamily Loricariinae, the second most diverse within the family Loricariidae. The group occurs across all Neotropical drainages; however, its diversity in coastal basins of Northeastern Brazil has historically been underestimated, with uncertain records and incomplete diagnoses. In this thesis, an integrative approach was adopted, combining morphological (morphometric and meristic) and molecular data (mitochondrial gene cox1) to revise the taxonomy and delimit species of the genera Loricaria and Loricariichthys in three Northeastern ecoregions. More than 160 specimens of Loricaria and 230 of Loricariichthys were analyzed from eight river basins, spanning from the states of Maranhão to Rio Grande do Norte. The analyses revealed multiple distinct evolutionary lineages, including cryptic species,
mainly among individuals previously assigned to Loricariichthys derbyi and L. platymetopon, and supported the redescription of L. derbyi. For Loricaria, morphological and molecular data supported the description of two new species endemic to the Munim and Itapecuru river basins in the Cerrado of Maranhão. Overall, the results of this thesis indicate that the diversity of Loricariinae in Northeastern Brazil has been substantially underestimated and
demonstrate the potential of integrative taxonomy for resolving species complexes. Furthermore, the findings have important implications for the historical biogeography of coastal drainages, suggesting that hydrographic isolation and vicariance events acted as drivers of local diversification. From a conservation perspective, it is recommended that the species recognized in this study be considered in extinction risk assessments, future inventories, and conservation policies, given the increasing impacts on the aquatic ecosystems of the region

 

COMMITTEE MEMBERS:
Externa à Instituição - CARINE CAVALCANTE CHAMON - UFT
Externo à Instituição - JORGE LUIZ SILVA NUNES - UFMA
Presidente - 1865104 - SERGIO MAIA QUEIROZ LIMA
Externa à Instituição - SILVIA YASMIN LUSTOSA COSTA - UEPB
Externo à Instituição - UEDSON PEREIRA JACOBINA - UFAL