Two new species of Leporinus Agassiz, 1829 from Araguaia-Tocantins system, Amazon basin, Brazil (Ostariophysi, Anostomidae)

Jc, Garavello; Gm, Santos

doi:10.1590/s1519-69842009000100013

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…Symphyseal teeth bearing three cusps, and between two and three cusps in the second and third positions. Myers (1950) used dental morphology to diagnose most genera of the Anostomidae, as it was widely used method then (Winterbottom 1980;Garavello and Santos 2009;Ramirez et al 2017). The genera Anostomus, Pseudanos, and Petulanos have compressed teeth (i.e., without mesial ridge) with three or four rounded cusps of similar size on the premaxilla and dentary (see Myers 1950;Winterbottom 1980).…”

Section: General Description Comparisons and Remarksmentioning

confidence: 99%

A Pliocene–Pleistocene continental biota from Venezuela

Carrillo-Briceño

Sánchez²,

Scheyer

et al. 2021

Swiss J Palaeontol

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The Pliocene–Pleistocene transition in the Neotropics is poorly understood despite the major climatic changes that occurred at the onset of the Quaternary. The San Gregorio Formation, the younger unit of the Urumaco Sequence, preserves a fauna that documents this critical transition. We report stingrays, freshwater bony fishes, amphibians, crocodiles, lizards, snakes, aquatic and terrestrial turtles, and mammals. A total of 49 taxa are reported from the Vergel Member (late Pliocene) and nine taxa from the Cocuiza Member (Early Pleistocene), with 28 and 18 taxa reported for the first time in the Urumaco sequence and Venezuela, respectively. Our findings include the first fossil record of the freshwater fishes Megaleporinus, Schizodon, Amblydoras, Scorpiodoras, and the pipesnake Anilius scytale, all from Pliocene strata. The late Pliocene and Early Pleistocene ages proposed here for the Vergel and Cocuiza members, respectively, are supported by their stratigraphic position, palynology, nannoplankton, and 86Sr/88Sr dating. Mammals from the Vergel Member are associated with the first major pulse of the Great American Biotic Interchange. In contrast to the dry conditions prevailing today, the San Gregorio Formation documents mixed open grassland/forest areas surrounding permanent freshwater systems, following the isolation of the northern South American basin from western Amazonia. These findings support the hypothesis that range contraction of many taxa to their current distribution in northern South America occurred rapidly during at least the last 1.5 million years.

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Section: General Description Comparisons and Remarksmentioning

confidence: 99%

A Pliocene–Pleistocene continental biota from Venezuela

Carrillo-Briceño

Sánchez²,

Scheyer

et al. 2021

Swiss J Palaeontol

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“…How the Characiformes and Siluriformes ichthyofauna of these basins from the Amazonian Dry Lowlands includes native species, is possible to identify some individuality in the Capim ichthyofauna. For example, small sized species of the families Anostomidae, as observed by Garavello and Santos [21], Characidae, Curimatidae, Auchenipteridae, Doradidae, Pimelodidae and Loricariidae are much frequent than the own large ones of each family suggesting a selection of species on basis of size in the Capim River. This event is also very common in the Tocantins River, while it is uncommon in Guamá River basin.…”

Section: Discussionmentioning

confidence: 81%

Ichthyological Overview and Remarks on Freshwater Fishes from Capim River, Lower Amazon Basin, Brazil

Garavello¹,

Oliveira²

2014

OJE

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The Capim River drainage should be considered small and thin by comparison with large Amazonian rivers. It rises by confluence of the Surubiú and Ararandeua rivers near 400 m high and their headwaters would be comfortably included in the Dry Emerged Lowland (terra firme) forest area of Sternberg's Amazonian concept. Because of this reason the freshwater fish fauna of Capim River is comprised mainly by Amazonian fish families found in tributaries also with origin in terra firme areas. The ichthyofauna from the main channel of the poorly sampled Capim River, in the stretch between its confluence with Tauarí River and its mouth at Guamá River, is herein reported by way of rapid assessment. Also broad comparisons were made among freshwater fishes of the Capim with that from Tocantins and Guamá rivers. Two rapid access research surveys of collecting ichthyological material were performed in dry and humid periods of the year 1998 comprising the regional hydrologic cycle. The ichthyological diversity showed by the 461 studied specimens includes 79 species probably derived from Guamá and Tocantins rivers. These species are distributed between two situations: 1) downstream Capim River, at confluence with Guamá River, where is under tidal waters influence and periodically flooded, and 2) upriver Capim that is less humid and with water rapids, independent from sea hydrologic influence. This fish fauna includes local species common at high areas of the Amazonian Dry Emerged Lowland that are in part shared with that from Tocantins River. In view of these observations, we assume that the Capim River freshwater ichthyofauna may reflect diverse origin from the simple transfer of populations from Guamá River, but originate through a more complex process including the past ichthyofauna of the earlier drainages of terra firme forest and their reorganization.

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“…Ferreira, Oliveira, Venere, Galetti Jr., and Martins (2007), Olivatti et al (2011) and Garavello et al (2021) investigated genetic characters of genera from this family. Garavello and Santos (2009) found a species identified as Leporinus unitaeniatus and stated that there is a shortage of taxonomic information about the specimens of the genus Leporinus for the Tocantins/Araguaia basin. Britski and Birindelli (2008) described a new species of this genus in the basin, distinct from the other two (Leporinus parae and Leporinus lacustris) in dental pattern and habitat preference.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of ichthyofauna in lotic and lentic environments in the Araguaia River basin, Cerrado Biome, Brazil

Corrêa

Santana²,

Pinto³

et al. 2022

Acta Sci. Biol. Sci.

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The Araguaia River is an important watercourse located in Central Brazil and well known for its diversity of fish fauna. Differences between landscape and resources in the distinct environments existing in a floodplain can determine the success of a species. This study presents a list of ichthyofauna species found in lentic and lotic environments in the floodplain of the Araguaia River basin, bordering Mato Grosso and Goiás States. We carried out sampling in July 2019, during the dry season, using diverse fish collection strategies, such as waiting nets, trawl, cast net and fishing rods. Were distributed 12 sampling points between lentic and lotic environments and we captured a total of 168 individuals of 42 species, 19 families and six orders. The predominant orders were Characiformes, Siluriformes and Cichliformes, while the families were Serrasalmidae, Characidae, Triportheidae, Curimatidae and Anostomidae. The genera Triportheus, Psectrogaster and Moenkhausia were the most abundant, while Pimelodus was the most dispersed. Results showed greater abundance and diversity in the lentic environment than in the lotic one, with top-of-the-chain species in both. The variance between environments and the presence of species that are endemic, recently described, of undefined taxonomic status, and bioindicators, highlight the importance of conserving and further studying the ichthyofauna in the Araguaia River basin.

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Two new species of Leporinus Agassiz, 1829 from Araguaia-Tocantins system, Amazon basin, Brazil (Ostariophysi, Anostomidae)

Cited by 13 publications

References 3 publications

A Pliocene–Pleistocene continental biota from Venezuela

A Pliocene–Pleistocene continental biota from Venezuela

Ichthyological Overview and Remarks on Freshwater Fishes from Capim River, Lower Amazon Basin, Brazil

Evaluation of ichthyofauna in lotic and lentic environments in the Araguaia River basin, Cerrado Biome, Brazil

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