Water Tracing Experiments in Low-pH Quartzite Karst Water, Chapada Diamantina, Northeastern Brazil

Moenkhausia diamantina, new species, is described from tributaries of the rio Paraguaçu, BA, northeastern Brazil. This species is distinguished from all congeners by features of body color pattern, the presence of scales on the predorsal median line and the number of anal-fin rays.

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The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

Neotropical Ichthyology ◽

10.1590/s1679-62252010000400001 ◽

2010 ◽

Vol 8 (4) ◽

pp. 673-706 ◽

Cited By ~ 13

Author(s):

Flávio A. Bockmann ◽

Ricardo M. C. Castro

Keyword(s):

Natural History ◽

Lateral Line ◽

Morphological Plasticity ◽

Transverse Process ◽

Sister Group ◽

Northeastern Brazil ◽

Caudal Fin ◽

Chapada Diamantina ◽

Fin Rays ◽

Group Relationships

Rhamdiopsis krugi, a new troglobitic heptapterid catfish, is described from the caves of Chapada Diamantina, State of Bahia, northeastern Brazil. This species, although frequently cited in the scientific literature along the last seventeen years, remained undescribed largely due to its uncertain phylogenetic affinities. The generic assignment of R. krugi was clouded largely by its high number of unusual morphological features (some related to cave life), for instance: absence of eyes and body pigmentation; presence of a widely exposed pseudotympanum; posterior border of the anterior branch and anterior margin of the arborescent portion of the posterior branch of the transverse process of fourth vertebra joined; dorsal hypural plate commonly with seven rays; ventral caudal plate usually with six rays; dorsal and ventral caudal-fin lobes typically with six branched fin rays each; 38-39 vertebrae; anal fin with 14-17 rays; and lateral line very short. Rhamdiopsis krugi can be easily distinguished from its congeners, R. microcephala and R. moreirai, by its troglomorphic features and by the presence of a shorter lateral line, fewer vertebrae and anal-fin rays, pattern of branching of caudal-fin rays, and several attributes of skeletal system. The affinities of this new species are discussed in light of current phylogenetic knowledge of the family Heptapteridae. Incongruent derived characters do not allow selection of a particular hypothesis of sister group relationships among species of Rhamdiopsis. The occurrence of R. krugi in the rio Paraguaçu basin is possibly due to an event of hydrological capture from a section of the middle portion of the rio São Francisco basin, caused by tectonic events. The semi-arid region where R. krugi presently lives was probably covered by a wide forested area during a humid cycle in Quaternary. A summary of natural history and ecology data of R. krugi, as well as notes on its conservation, are provided. We also offer comments on the morphological plasticity of R. krugi.

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Macro and microcharacters reveal a new species of Dichanthelium (Poaceae, Panicoideae) endemic to sandy soils of the Chapada Diamantina, Bahia, northeastern Brazil

Phytotaxa ◽

10.11646/phytotaxa.447.3.1 ◽

2020 ◽

Vol 447 (3) ◽

pp. 149-162

Author(s):

ANDREZA O. MATOS ◽

JOSEANE S. CARNEIRO ◽

IASMIN L. C. OLIVEIRA ◽

KELLY R. B. LEITE ◽

CHRISTIAN SILVA ◽

...

Keyword(s):

New Species ◽

Conservation Status ◽

Sandy Soils ◽

Northeastern Brazil ◽

Campo Rupestre ◽

Chapada Diamantina ◽

The Family ◽

Northern Portion ◽

Status Assessment ◽

Reproductive Characters

Dichanthelium is a genus belonging to the family Poaceae, included in the subfamily Panicoideae. It is widely distributed on the American continent, from Canada to Argentina. In Brazil, several species are endemic, mainly to the Chapada Diamantina, the Bahian portion of the Espinhaço range. One of them, D. cumbucana, has a problematic circumscription. During the preparation of a taxonomic account of Dichanthelium for Bahia, we found some specimens from Morro do Chapéu, a municipality of the northern portion of Chapada Diamantina, to be similar to D. cumbucana, but with distinguishing features. After morphological, anatomical and scanning electron microscopy (SEM) analyses, we found significant differences in the vegetative and reproductive characters of these specimens. Based on these data, we consider these specimens to be part of an independent taxon, herein described as the new species D. arenicola, which is only known from areas of sandy soils associated with “campo rupestre” vegetation. We also provide illustrations, data on habitat and distribution, as well as a conservation status assessment for the new species.

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PERINOTIA DIAMANTINASP. NOV., A NEW DIATOM SPECIES FROM THE CHAPADA DIAMANTINA, NORTHEASTERN BRAZIL

Diatom Research ◽

10.1080/0269249x.2009.9705784 ◽

2009 ◽

Vol 24 (1) ◽

pp. 79-100 ◽

Cited By ~ 5

Author(s):

Fernanda Ferrari ◽

Carlos Eduardo Wetzel ◽

Luc Ector ◽

Saúl Blanco ◽

João Cláudio Cerqueira Viana ◽

...

Keyword(s):

Northeastern Brazil ◽

Diatom Species ◽

Chapada Diamantina

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A new karyotype of Wiedomys pyrrhorhinus (Rodentia: Sigmodontinae) from Chapada Diamantina, northeastern Brazil

Zoologia (Curitiba) ◽

10.1590/s1984-46702011000100013 ◽

2011 ◽

Vol 28 (1) ◽

pp. 92-96 ◽

Cited By ~ 3

Author(s):

Ana L. G Souza ◽

Margaret M. de O Corrêa ◽

Cecília T. de Aguilar ◽

Leila M Pessôa

Keyword(s):

Northeastern Brazil ◽

Chapada Diamantina

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Pollination biology of Paliavana tenuiflora (Gesneriaceae: Sinningeae) in Northeastern Brazil

Acta Botanica Brasilica ◽

10.1590/s0102-33062010000400012 ◽

2010 ◽

Vol 24 (4) ◽

pp. 972-977 ◽

Cited By ~ 3

Author(s):

Patrícia Alves Ferreira ◽

Blandina Felipe Viana

Keyword(s):

Fruit Set ◽

Sugar Content ◽

Low Frequency ◽

Floral Biology ◽

Time Of Day ◽

Northeastern Brazil ◽

Pollination Syndrome ◽

Campos Rupestres ◽

Bee Pollination ◽

Chapada Diamantina

In this study the floral biology, breeding system, visitors and pollinators of Paliavana tenuiflora were analyzed in campos rupestres in the Chapada Diamantina, Mucugê, Bahia, Brazil. Paliavana tenuiflora is a shrub with blue-violet, bell-shaped flowers, with anthesis at 11:00 h; the flowers last about six days. Large amounts of nectar are produced (volume average 15.5µL, concentration 22.7% and sugar content 5.0 mg mL-1). The amount of nectar is not related to the time of day, but concentration varied with volume. The species is self-compatible, but fruit set depends on pollinators. Although nectar is available by day and night, flowers of P. tenuiflora fit the bee pollination syndrome, and are actually pollinated by Bombusbrevivillus. However, the hummingbird Phaethornis pretrei can be considered an occasional pollinator, due to its behavior and low frequency of visits. Our results suggest a mixed pollination system, although the importance of P.pretrei as a pollinator remains to be better evaluated.

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A new dwarf species of Proceratophrys Miranda-Ribeiro, 1920 (Anura, Cycloramphidae) from the highlands of Chapada Diamantina, Bahia, Brazil

Zootaxa ◽

10.11646/zootaxa.3551.1.2 ◽

2012 ◽

Vol 3551 (1) ◽

pp. 25 ◽

Cited By ~ 12

Author(s):

MAURO TEIXEIRA JUNIOR ◽

RENATA CECÍLIA AMARO ◽

RENATO SOUSA RECODER ◽

FRANCISCO DAL VECHIO ◽

MIGUEL TREFAUT RODRIGUES

Keyword(s):

New Species ◽

Northeastern Brazil ◽

Chapada Diamantina ◽

Natural Groups ◽

A New Species

A new species of Proceratophrys is described from the highlands of northeastern Brazil. Molecular and morphologicaldata suggests that Proceratophrys redacta sp. nov. is sister to P. minuta, and related to P. schirchi and P. cristiceps. Thenew species is diagnosed by its small size, absence of rostral and palpebral appendages, sagittal ridges interrupted, absenceof postocular swellings, snout vertical in profile and dorsal coloration lacking distinct ocelli. The new species representsanother example of endemism for the genus Proceratophrys in Chapada Diamantina region, and of another appendagelesssmall-sized species associated with highlands. The phylogenetic results indicate that current morphological groupings in Proceratophrys may not represent natural groups.

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