scholarly journals Ergasilus chelangulatus sp. nov. (Copepoda: Ergasilidae) a branchial parasite of the freshwater catfish, Pimelodus maculatus from the upper São Francisco River, Brazil

2008 ◽  
Vol 25 (3) ◽  
pp. 512-514 ◽  
Author(s):  
Vernon E. Thatcher ◽  
Marilia C. Brasil-Sato
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
Antennal Segment ◽  
Minas Gerais ◽  
The Body ◽  
Freshwater Catfish ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Minas Gerais State ◽  
Pimelodus Maculatus

Ergasilus chelangulatus sp. nov. is described from the freshwater fish, Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) of the upper São Francisco River, Minas Gerais State, Brazil. The new species is based on female specimens and the male is unknown. This species has a serrate seta on exopod one and a two-segmented first endopod, as do most Amazonian species of this genus. The body is elongate and produced anteriorly. The antennae are elongate and have prominent sensilla on segments two and three. Ergasilus chelangulatus sp. nov. can be distinguished from all known species of Ergasilus by the fourth antennal segment (claw) which is bent at nearly a right angle.

Gamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil

2008 ◽  
Vol 53 (3) ◽  
Author(s):  
Vernon Thatcher ◽  
Michelle Santos ◽  
Marilia Brasil-Sato
Keyword(s):  
New Species ◽  
San Francisco ◽  
Type Species ◽  
Antennal Segment ◽  
Minas Gerais ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Minas Gerais State ◽  
Simple Seta ◽  
Três Marias Reservoir

AbstractGamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of “San Francisco piranha”, Pygocentrus piraya (Cuvier, 1819) and.White piranha. Serrasalmus brandtii (Lütken, 1875) is described. The new species is similar to the type species of the genus, Gamidactylus jaraquensis Thatcher et Boeger, 1984, but differs from it in the following respects: the cephalothorax is shorter, the free thoracic segments are usually longer, leg 5 is reduced to a simple seta and a spine on the second antennal segment is lacking. Gamidactylus bryconis Varella, 1995 and Gamidactylus hoplius Varella et Malta, 1996, do not closely resemble the new species because they are much larger and both present leg 5 reduced to a double seta.

Brasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) from the gills and nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil

2007 ◽  
Vol 52 (3) ◽  
Author(s):  
Michelle Santos ◽  
Vernon Thatcher ◽  
Marilia Brasil-Sato
Keyword(s):  
New Species ◽  
Distal Segment ◽  
Minas Gerais ◽  
Terminal Segment ◽  
Sao Francisco River ◽  
Genital Complex ◽  
São Francisco River ◽  
Minas Gerais State ◽  
Três Marias Reservoir

AbstractBrasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) is described. Specimens of the new species were collected from the gills and nasal fossae of the serrasalmid fishes, known as “piranhas”, Pygocentrus piraya (Cuvier, 1819) and “pirambebas”, Serrasalmus brandtii (Lütken, 1875). The fishes were netted in the Três Marias Reservoir (18°12′59″S, 45°17′34″W) of the upper São Francisco River, Minas Gerais State, Brazil. The new species differs from its congeners by the following characters: the specific setation on the antennule; the terminal barb of the antenna; the deeply bifurcate distal segment of the mandible; the chalice-shaped genital complex; a conspicuous external indentation of the second segment of the first endopod and a very short terminal segment of the first exopod.

Certain species of Plecoptera from the headwater springs of National Integration River (São Francisco), Brazil

Zootaxa ◽  
2018 ◽  
Vol 4429 (1) ◽  
pp. 195
Author(s):  
MARCOS CARNEIRO NOVAES ◽  
DIOGO SILVA VILELA ◽  
VINICIUS MARQUES LOPEZ ◽  
RHAINER GUILLERMO NASCIMENTO FERREIRA
Keyword(s):  
New Species ◽  
National Park ◽  
Minas Gerais ◽  
Southeastern Brazil ◽  
National Integration ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Minas Gerais State ◽  
A New Species

Specimens of Anacroneuria Klapálek 1909 (Plecoptera: Perlidae) and Tupiperla Froehlich 1969 (Plecoptera: Gripopterygidae) from the headwater springs of the National Integration River (São Francisco River), Serra da Canastra National Park, in Minas Gerais State, of southeastern Brazil, were studied. A new species, Anacroneuria saofrancisco n. sp. is described and the descriptions of the nymph and the female of A. saofrancisco are also presented. 

New loricariid fishes from headwaters on Serra da Mantiqueira and Complexo do Espinhaço, Minas Gerais State, Brazil (Teleostei: Siluriformes: Loricariidae)

Zootaxa ◽  
2019 ◽  
Vol 4586 (3) ◽  
pp. 401 ◽  
Author(s):  
JOSÉ C. DE OLIVEIRA ◽  
OSVALDO T. OYAKAWA
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Rio Grande ◽  
First Record ◽  
Minas Gerais ◽  
The Body ◽  
Minas Gerais State ◽  
Adipose Fin ◽  
Three New Species ◽  
Cadeia Do Espinhaço

Three new species, of three different genera of loricariids, are described from the headwaters of Serra da Mantiqueira and Cadeia do Espinhaço, in Southeastern Minas Gerais State, Brazil. In this region, the Serra da Mantiqueira and the Complexo do Espinhaço are the highest points of the Brazilian Shield and delimits the headwaters of four drainages: São Francisco, Paraná, Doce and Paraíba do Sul basins. Harttia intermontana, n. sp., is described from the headwaters of the Rio Doce basin and is the first record of the genus in this basin. The new species can be distinguished from its congeners by the pattern of abdominal covering, presence of preanal plates, presence and pattern of ornamentation of canal plate, and some characteristics related to sexual dimorphism. Pareiorhaphis togoroi, n. sp., is described from the headwaters of the Rio das Mortes basin, tributary to the Rio Grande, in the upper Rio Paraná drainage, and represents the first record of the genus to this drainage, thus expanding its geographic distribution. It can be distinguished from most congeners by the absence of preadipose azygous plates, and characteristics related to secondary sexual characters of mature males: presence of odontodes on the lateral margin of head plus the absence of long hypertrophied odontodes on pectoral-fin spine. Neoplecostomus pirangaensis, n. sp., is described from the headwaters of the Rio Piranga, Rio Doce basin. The new species differs from all congeners by the much-reduced dermal platelets on the abdomen, devoid of developed odontodes between the insertions of the pectoral and pelvic fins. Neoplecostomus pirangaensis can also be distinguished from all congeners, except N. botucatu and N. paranensis, due to the complete absence of vestiges of the adipose fin (vs. vestiges, or adipose fin moderate to well developed and always present). The new species differs from N. botucatu by the absence of conspicuous dark spots all over the body and the presence of common dorsal bands in juveniles, and almost totally black in adults. It differs from N. paranensis by the bigger and less numerous teeth. Additionally, the new species differs from Neoplecostomus doceensis by the absence of enlarged fleshy folds between dentaries, and absence of a lateronasal plate. 

scholarly journals Spatial distribution of Megalancistrus barrae (Steindachner 1910), and first record on the high stretch of São Francisco basin

Check List ◽  
2015 ◽  
Vol 11 (4) ◽  
pp. 1695
Author(s):  
Gilberto N. Salvador ◽  
Gustavo R. Rosa ◽  
Gabriel Caetano Guimarães Mello ◽  
Fábio Firpe
Keyword(s):  
Spatial Distribution ◽  
River Basin ◽  
First Record ◽  
Minas Gerais ◽  
The Other ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Minas Gerais State

Megalancistrus barrae is a species endemic to the São Francisco River basin that has not previously been recorded from the Upper São Francisco basin.The present work increases the known distribution of the species by reporting new collections from two different regions in the Upper São Francisco basin: one in the Pará River and the other in the São Francisco River, downstream Três Marias dam, Minas Gerais state. In addition, this study compiles distributional data on Megalancistrus barrae from museums. 

scholarly journals Ergasilussalmini sp. nov. (Copepoda: Ergasilidae) a branchial parasite of "dourado", Salminus franciscanus from the upper São Francisco River, Brazil

2008 ◽  
Vol 25 (3) ◽  
pp. 555-557 ◽  
Author(s):  
Vernon E. Thatcher ◽  
Marilia C. Brasil-Sato
Keyword(s):  
New Species ◽  
Abdominal Segment ◽  
River System ◽  
Thoracic Segment ◽  
South American ◽  
South American Species ◽  
Sao Francisco River ◽  
The Third ◽  
São Francisco River ◽  
Minas Gerais State

Ergasilus salmini sp. nov. a branchial parasite of the "dourado", Salminus franciscanus Lima & Britski, 2007, from the upper São Francisco river, Minas Gerais State, Brazil, is described based on female specimens. The new species has a serrate, curved seta on the first exopod as do most of the known South American species of the genus. Other than that, it does not closely resemble any known species of this genus. Many of the known ergasilids have head, and first two thoracic segments completely fused to form a cephalothorax. In the new species, the head is incompletely fused, the first thoracic segment is fused, but thoracic segment two is free. Ergasilus hydrolycus Thatcher, Boeger & Robertson, 1984, also has a free second thoracic segment but in that species the head is completely fused and the third abdominal segment is the longest. In the new species, the third segment is the shortest of the three. Also, the new species is smaller averaging 691 x 207 µ m compared to 784 x 278 µ m for E. hydrolycus. The latter species has a two-segmented fourth endopod whereas in the new species this structure is three-segmented. In addition, the new species is from a different host and a separate river system.

scholarly journals Fish fauna of the Pandeiros River, a region of environmental protection for fish species in Minas Gerais state, Brazil

Check List ◽  
2015 ◽  
Vol 11 (1) ◽  
pp. 1507 ◽  
Author(s):  
Udson Santos ◽  
Priscilla Caroline Silva ◽  
Lucas Caetano Barros ◽  
Jorge Abdala Dergam
Keyword(s):  
Environmental Protection ◽  
Fish Species ◽  
Sustainable Use ◽  
Fish Fauna ◽  
Minas Gerais ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Minas Gerais State ◽  
Peacock Bass ◽  
A New Species

The Area of Environmental Protection of the Pandeiros River is the largest unit for sustainable use in Minas Gerais state, Brazil. The Pandeiros Wetland in the lower part of this river is considered a nursery for most migratory fish species of the São Francisco River and it is currently threatened by the introduced peacock-bass Cichla piquiti (Kullander & Ferreira, 2006). In this study, a list of fish species from the Pandeiros River was developed and compared with data for populations from other regions in the São Francisco basin. The presence of a new species record for the São Francisco River basin in the Pandeiros, and the particular local biotic and abiotic conditions of that river, support its recognition as an important conservation unit within the basin.

scholarly journals Does predator benefits prey? Commensalism between Corynoneura Winnertz (Diptera, Chironomidae) and Corydalus Latreille (Megaloptera, Corydalidae) in Southeastern Brazil

2006 ◽  
Vol 23 (2) ◽  
pp. 569-572 ◽  
Author(s):  
Marcos Callisto ◽  
Michael D.C. Goulart ◽  
Pablo Moreno ◽  
Rogério P. Martins
Keyword(s):  
Body Size ◽  
Minas Gerais ◽  
Southeastern Brazil ◽  
Sao Francisco River ◽  
Serra Do Cipó ◽  
São Francisco River ◽  
Minas Gerais State

Commensalism between Corydalus Latreille, 1802 (Megaloptera, Corydalidae) and Corynoneura Winnertz, 1846 (Diptera, Chironomidae, Orthocladiinae) larvae was recorded in Indaiá stream, at 1,380 m a.s.l. (Parque Nacional da Serra do Cipó, 19º-20ºS, 43º-44ºW) and in the headwaters of São Francisco river, at 1,300-1,700 m a.s.l. (Parque Nacional da Serra da Canastra, 20º00'-20º30'S, 46º15'-47º00'W), in Minas Gerais state, Brazil. Seventy eight Corydalus larvae (range 22-88 mm) were sampled: 61 in the Indaiá stream and 17 in other two streams. Twelve Corydalus larvae (22-79 mm) in the Indaiá stream and three out of 15 larvae in the headwaters of São Francisco river (38-50 mm) had Corynoneura, larvae and pupae on their gills (3rd to 6th) and a few larvae attached to the abdominal segments of larger Corydalus larvae (> 25 mm). Sixty-nine larvae of Corynoneura were found in the regurgitated material from Corydalus. It is remarkable that by attaching to larger body size predators, prey could become free from predator bouts and could also be transported by them.

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