A new genus and species of Sarcoglanidinae (Siluriformes: Trichomycteridae) from southeastern Brazil, with a re-examination of subfamilial phylogeny

Costa, Wilson J. E. M.; Bockmann, Flávio Alicino

doi:10.1080/00222939400770331

Cited by 33 publications

(92 citation statements)

References 7 publications

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“…In glanapterygines, this process started with the genus Listrura, initially with two species (de Pinna, 1988) but eventually followed by a series of new species, all from Atlantic coastal drainages (de Pinna & Wosiacki, 2002;Landim & Costa, 2002;Villa-Verde & Costa, 2006;VillaVerde et al, 2012VillaVerde et al, , 2013. Quite the same process happened with sarcoglanidines, with the genera, Stauroglanis, Stenolicmus, Microcambeva and Ammoglanis discovered in quick succession during the later years of the twentieth century (de Pinna, 1989;de Pinna & Starnes, 1990;Costa & Bockmann, 1994;. This is a stark contrast with the situation in 1973, when only Sarcoglanis and Malacoglanis were known.…”

Section: Resultscontrasting

confidence: 43%

The dawn of phylogenetic research on Neotropical fishes: a commentary and introduction to Baskin (1973), with an overview of past progress on trichomycterid phylogenetics

Pinna

Mario²

2016

Neotrop. ichthyol.

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A review is made of the impact of the landmark Ph. D. Thesis of Jonathan N. Baskin from 1973 on the development of the phylogenetics of catfishes and some of its main subgroups and on neotropical ichthyology in general. Baskin's work is the first to propose a hypothesis of relationships for loricarioid catfishes and for the family Trichomycteridae on the basis of explicit Hennigian principles. It is arguably also the first application of phylogenetic methods to any group of neotropical fishes. The hypotheses presented by Baskin covered the monophyly of Siluriformes, the monophyly and relationships of loricarioid families and the relationships of Trichomycteridae (including the monophyly of the family and the relationships among its constituent genera). His discoveries are analyzed in view of the subsequent 40-odd years of progress on the understanding of the phylogeny of the respective groups. The ideas proposed in 1973 have resisted the test of time remarkably well, and a majority of them have been corroborated by additional characters and taxa (including molecular data and several taxa newly discovered in the meantime), as well as by modern quantitative analysis.Um ensaio é realizado sobre o impacto da tese de doutorado pioneira de 1973 de Jonathan N. Baskin no desenvolvimento do conhecimento filogenético de Siluriformes e alguns dos seus principais subgrupos e na ictiologia neotropical em geral. O trabalho de Baskin é o primeiro a propor uma hipótese de relações para os bagres loricarioides e para a família Trichomycteridae com base em princípios Hennigianos explícitos. Provavelmente é também a primeira implementação de métodos filogenéticos em qualquer grupo de peixes de água doce neotropicais. As hipóteses apresentadas por Baskin cobrem o monofiletismo de Siluriformes, o monofiletismo e as relações filogenéticas das famílias de Loricarioidea, e as relações filogenéticas de Trichomycteridae (incluindo o monofiletismo da família e as relações entre seus gêneros constituintes). Suas descobertas são analisadas à luz dos mais de 40 anos de progresso no entendimento da filogenia dos respectivos grupos. As ideias propostas em 1973 resistiram ao teste do tempo bastante bem e a maioria delas foi corroborada por caracteres ou táxons adicionais (incluindo dados moleculares e muitos táxons descobertos no interim), assim como por análises quantitativas mais modernas.

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Section: Resultscontrasting

confidence: 43%

The dawn of phylogenetic research on Neotropical fishes: a commentary and introduction to Baskin (1973), with an overview of past progress on trichomycterid phylogenetics

Pinna

Mario²

2016

Neotrop. ichthyol.

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“…, from the Ribeira de Iguape, both in southeastern Brazil. The genus Microcambeva was hypothesized by Costa & Bockmann (1994) to be the sister-group of a more inclusive clade: the monotypic genera Malacoglanis from río Caquetá, Colombia plus Sarcoglanis, from the Amazonian rio Negro basin (Fig. 10d).…”

Section: Intermediate History: Pattern Bmentioning

confidence: 99%

Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

2006

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Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin Alexandre Cunha RibeiroThe eastern Brazilian coastal drainages are of great biogeographical significance, because of their highly endemic fish faunas. Phylogenetic patterns suggest a close biotic relationship between the rivers that flow into the Atlantic and those on the adjacent upland crystalline shield. However, little has been said on the dynamics of the geological processes causally related to the cladogenetic events between these areas. Distributional and phylogenetic patterns suggest a close association with the geological history of the passive continental margin of South America, from the Cretaceous to the present day. In this area megadome uplifts, rifting, vertical movements between rifted blocks and the erosive retreat of the South American eastern continental margin are hypothesized as the main geological forces controlling the distribution of freshwater fishes. The tectonic activity associated with the break-up of Gondwana and separation of South America and Africa formed six megadomes that control most of the current courses of the main crystalline shield river basins. Except for basins located at the edges of such megadomes, these river systems developed long, circuitous routes over the ancient Brazilian crystalline shield before emptying into the recently opened Atlantic Ocean. Initial cladogenetic events between upland crystalline drainages and Atlantic tributaries were probably associated with vicariant processes, and some ancient basal sister-groups of widespread inclusive taxa are found in these coastal hydrographic systems. Later, generalized erosive denudation resulted in an isostatic adjustment of the eastern margin of the platform. These, along with reactivations of ancient rifts led to vertical movements between rifted blocks and gave rise, in southeastern Brazil, to taphrogenic (rift related) basins. These basins, such as the Taubaté, São Paulo, Curitiba and Volta Redonda basins, among others, captured adjacent upland drainages and fauna. The fossil fishes from the Tremembé Formation (Eocene-Oligocene of Taubaté Basin) exemplify this process. Other taphrogenic systems of Tertiary age were also identified in other segments of the Atlantic continental margin, such as in Borborema province, in NE Brazil, with marked influence over drainage patterns. At the same time, erosive retreat of the eastern margin of the platform successively captured upland rivers, which became Atlantic tributaries evolving associated to main rift systems. The continued nature of these processes explains the mixed phylogenetic and distributional patterns between Atlantic tributaries and the upland crystalline shield areas, especially in the southeastern continental margin, represented by successively, less inclusive sister-groups associated with cladogenetic events from the Late Cretaceous to the present.As drenagens costeiras do...

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“…This condition in S. gouldingi is likely derived, although a common trait in adult sarcoglanidines (de Pinna, 1989a;Costa & Bockmann, 1994a). Eyes are small in Ammoglanis pulex Pinna & Winemiller (cf.…”

Section: Small Body Sizementioning

confidence: 99%

“…The sarcoglanidine S. gouldingi has 40 vertebrae (de Pinna, 1989a), and all sarcoglanidines have 43 or fewer vertebrae (cf. Costa, 1994;Costa & Bockmann, 1994a;Costa et al, 2004;de Pinna & Starnes, 1990;de Pinna & Winemiller, 2000). The number of vertebrae of Microcambeva Costa & Bockmann, Stauroglanis, and Stenolicmus de Pinna & Starnes, although low, probably is a plesiomorphic state whereas 39-43 vertebrae is a variation widespread in the basal trichomycterid outgroups (e.g.…”

Section: Small Body Sizementioning

confidence: 99%

“…The trichomycterid Stauroglanis gouldingi reaches 27 mm SL (de Pinna & Wosiacki, 2003). Miniaturization is regarded by Costa & Bockmann (1994a) as a synapomorphy uniting the subfamilies Glanapteryginae and Sarcoglanidinae. However, size reduction has a wider distribution among the members of the clade TSVSG, which includes the subfamilies Tridentinae, Stegophilinae, Vandelliinae, Sarcoglanidinae, and Glanapteryginae (cf.…”

Section: Small Body Sizementioning

confidence: 99%

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A remarkable sand-dwelling fish assemblage from central Amazonia, with comments on the evolution of psammophily in South American freshwater fishes

2006

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We studied a specialised assemblage of sand-dwelling fish species from a streamlet in central Amazonia. The five sanddwelling species comprised 15.2 % of the total number in the streamlet (33 species). Two of the sand-dwellers are daytime foragers, Characidium cf. pteroides (Crenuchidae) and Stauroglanis gouldingi (Trichomycteridae), whereas three ones are night-time foragers, Gymnorhamphichthys rondoni (Rhamphichthyidae), "Imparfinis" pristos and Mastiglanis asopos (Heptapteridae). With the exception of C. cf. pteroides, the remainder species bury in the sand during their resting period. All five species bear a cryptic, sand-colour pattern, and some are translucent, traits which we regard as advantageous both for evasion from predators and for approaching prey (for the daytime foragers). All five species are microphagous carnivores and their foraging tactics range from generalised sit-and-wait (C. cf. pteroides) to active searching for interstitial prey (G. rondoni). A unique "drift-trap" system made up by the extended barbels and filamentous first pectoral-fin rays is employed by M. asopos. We regard the small size and low number of vertebrae (which is functionally expressed by fast displacements in the sand) as additional features advantageous to explore the sand habitat, allowing diving quickly in the substrate to evade predators and to forage for small prey in sand interstices or plant debris. The relationship between morphological and behavioural characters suited to life in sandy substrates is examined under the perspective of the current phylogenies for each group of psammophilous fishes here studied. The mapping of these characters demonstrates that not all of them evolved specifically for strict psammophily. Instead, some of them may represent the final step of a transformation series or synapomorphies of higher hierarchical levels. Several characters linked to psammophily, such as small body, large eyes, and scarce pigmentation are probably paedomorphic traits. We consider that the little variable specific composition of fish sand-dwelling assemblages and the wide (although patchy) geographical distribution of their species in the Amazon are due to the widespread occurrence and low complexity of this specialised habitat. The pre-existence of benthic habits, small size, and the broad distribution of rivers with sandy beds, mainly in the Amazon and Orinoco basins, possibly played a determinant role in the origin and diversification of psammophilous assemblages among freshwater fishes in South America.Estudamos uma comunidade especializada de espécies de peixes psamófilos de um igarapé na Amazônia central. As cinco espécies psamófilas correspondem a 15.2 % do número total estimado de espécies do igarapé (33 espécies). Duas das espécies psamófilas são forrageadores diurnos, Characidium cf. pteroides (Crenuchidae) e Stauroglanis gouldingi (Trichomycteridae), ao passo que três são forrageadores noturnos, Gymnorhamphichthys rondoni (Rhamphichthyidae), "Imparfinis" pristos e Mastiglanis asopos (Heptapteridae)...

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A new genus and species of Sarcoglanidinae (Siluriformes: Trichomycteridae) from southeastern Brazil, with a re-examination of subfamilial phylogeny

Cited by 33 publications

References 7 publications

The dawn of phylogenetic research on Neotropical fishes: a commentary and introduction to Baskin (1973), with an overview of past progress on trichomycterid phylogenetics

The dawn of phylogenetic research on Neotropical fishes: a commentary and introduction to Baskin (1973), with an overview of past progress on trichomycterid phylogenetics

Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

A remarkable sand-dwelling fish assemblage from central Amazonia, with comments on the evolution of psammophily in South American freshwater fishes

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