Banca de DEFESA: ORIGILENE BEZERRA DANTAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ORIGILENE BEZERRA DANTAS
DATE: 19/02/2024
TIME: 14:00
LOCAL: https://meet.google.com/ukb-swkt-xqt
TITLE:

Phylogeography of Rowlandius potiguar Santos, Ferreira & Buzzato, 2013 (Arachnida: Schizomida: Hubbardiidae) in Caatinga caves

KEY WORDS:

Subterranean biology; Arthropoda; lineage delimitation; Jandaíra Formation; integrative taxonomy; conservation.

 

PAGES: 84
BIG AREA: Ciências Biológicas
AREA: Genética
SUBÁREA: Genética Animal
SUMMARY:

Most of the caves in the State of Rio Grande do Norte (RN) are located in the limestones of the Jandaíra Formation, in the Caatinga. This region is considered to be of high biospeleological relevance, as it presents a high richness and concentration of species that are adapted to underground environments. Among them are the arachnids of the order Schizomida, also known as the short-tailed whip scorpion, whose species Rowlandius potiguar was recorded in 30 caves in western RN. Although some caves are protected in the Furna Feia National Park (PNFF), the majority are not in protected areas, making them vulnerable to different types of anthropogenic impacts. This wide distribution may reflect a troglophilic species that eventually colonized caves throughout the Jandaíra Formation, or a complex of troglobite species, as detected in other invertebrates in the region. To answer this question through a phylogeographic approach, we collected these schizomids in 12 caves of their known distribution, including the Casa de Pedra cave, which is the southernmost record of Rowlandius in RN, in the Jucurutu formation, as well as recording 14 new occurrences. Phylogeographic and phylogenetic analyses, using the molecular markers mitochondrial cytochrome C oxidase I and nuclear rDNA 28s, indicated that R. potiguar is a species complex, with two possible new species, one restricted to the Casa de Pedra cave (Rowlandius sp. n.2), and one more supported by morphological data on the female internal genitalia and the shape of the terminal flagellum at the end of the male abdomen, occurring in thirteen caves (Rowlandius sp.n.1). Furthermore, phylogeographic analyzes detected a structure of five populations for R. potiguar and three for Rowlandius sp.n.1. These lineages occur in allopatry and did not present a defined distribution pattern. We also highlight that the species identified in the complex are protected in conservation areas, such as the Furna Feia National Park, in Baraúna, and the Cavernas de Martins Natural Monument, in Martins. However, it is important to highlight that there are vulnerable populations in the municipalities of Governador Dix-Sept Rosado and Felipe Guerra. With this, we propose updating the taxonomy and geographic distribution of R. potiguar, while suggesting an increase in the richness of the genus Rowlandius in the Caatinga.

COMMITTEE MEMBERS:
Externo à Instituição - ADALBERTO JOSÉ DOS SANTOS - UFMG
Externo à Instituição - IVAN LUIZ FIORINI DE MAGALHÃES
Presidente - 1865104 - SERGIO MAIA QUEIROZ LIMA