The Genus Henonemus (siluriformes: Trichomycteridae) with a Description of a New Species from Venezuela

DoNascimiento, Carlos; Provenzano, Francisco

doi:10.1643/0045-8511(2006)6[198:tghstw]2.0.co;2

Cited by 9 publications

(8 citation statements)

References 5 publications

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“…Resolution of the relationships within Stegophilinae in our analysis is also largely compatible with the scheme proposed by Baskin (1973) and DoNascimiento & Provenzano (2006) on the basis of morphological data, and especially the maximum parsimony tree by Fernández & Schaefer (2009), on the basis of mitochondrial and nuclear gene sequences. The incongruences between our proposed scheme of relationships and the previous phylogenies of the Stegophilinae (Baskin, 1973;Fernández & Schaefer, 2009) are minor, and they rest mainly on the interchangeable position of the three consensually accepted basal genera: Haemomaster, Homodiaetus, and Ochmacanthus.…”

Section: Stegophilinaesupporting

confidence: 88%

“…This group may correspond at least to part of the well-corroborated Pareiodonclade (Baskin, 1973;DoNascimiento & Provenzano, 2006;Fernández & Schaefer, 2009), which also includes Acanthopoma, Henonemus, Megalocentor, and possibly Apomatoceros (DoNascimiento & Provenzano, 2006;Fernández & Schaefer, 2009), genera not included in this study. The Pareiodon-clade is diagnosed by the possession of a single medial epiphyseal pore (s6) in the supraorbital latero-sensory canal (Fig.…”

Section: Stegophilinaementioning

confidence: 84%

“…The Pareiodon-clade is diagnosed by the possession of a single medial epiphyseal pore (s6) in the supraorbital latero-sensory canal (Fig. 27) and of two rows of superficial neuromasts on the base of the caudal fin (Baskin, 1973;DoNascimiento & Provenzano, 2006).…”

Section: Stegophilinaementioning

confidence: 99%

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Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

2010

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The skeletal muscles of the dorsolateral region of the head of the Nematogenyidae and representatives of the all major clades of the Trichomycteridae are described and illustrated. A hypothesis on the phylogenetic relationships among these taxa exclusively based on the surveyed musculature is presented. The single most parsimonious cladogram obtained from the phylogenetic analysis of the 36 myological characters gathered and 35 terminal-taxa mostly agrees with the previous hypotheses of trichomycterid intrarelationships. The Copionodontinae and Trichogeninae form a monophyletic lineage that is the sistergroup to all remaining trichomycterids. The monophyly of the clades formed by Glanapteryginae plus Sarcoglanidinae; Stegophilinae plus Tridentinae plus Vandelliinae; and the assemblage comprising all of these five subfamilies (TSVSG clade) is corroborated. Two of our findings are, however, discordant with the previous prevailing hypotheses: the sister-group relationship among Tridentinae and Stegophilinae and the monophyly of the Trichomycterinae lato sensu, i.e., including the genera Scleronema and Ituglanis. In addition, the previously proposed osteological synapomorphies supporting the close affinities of Scleronema and Ituglanis with the TSVSG clade were revised, revealing that they are either invalid or ambiguous. Most of the synapomorphies herein proposed are homoplasy-free, with some of them corroborating the monophyly of weakly-supported groups, such as Stegophilinae.Os músculos esqueléticos da região dorsolateral da cabeça de Nematogenyidae e de representantes de todos os maiores clados de Trichomycteridae são descritos e ilustrados. Uma hipótese das relações filogenéticas entre estes táxons, baseada exclusivamente na musculatura estudada, é apresentada. O único cladograma mais parcimonioso obtido da análise filogenética dos 36 caracteres miológicos levantados e 35 táxons-terminais concorda com a maior parte das hipóteses anteriores de relações entre os tricomicterídeos. Copionodontinae e Trichogeninae formam uma linhagem monofilética que é grupo-irmã de todos os demais tricomicterídeos. O monofiletismo dos clados formados por Glanapteryginae mais Sarcoglanidinae; Stegophilinae mais Tridentinae mais Vandelliinae; e do agrupamento incluindo estas cinco subfamílias (clado TSVSG) é corroborado. Duas de nossas descobertas são, entretanto, discordantes com relação às hipóteses anteriores mais aceitas: a relação de grupo-irmão entre Tridentinae e Stegophilinae e o monofiletismo de Trichomycterinae lato sensu, i.e., incluindo os gêneros Scleronema e Ituglanis. Além disso, as sinapomorfias osteológicas previamente propostas suportando as relações de afinidade de Scleronema e Ituglanis com o clado TSVSG foram revisadas, revelando serem inválidas ou ambíguas. A maior parte das sinapomorfias aqui propostas são livres de homoplasias, com algumas delas corroborando o monofiletismo de grupos fracamente suportados, tais como o da subfamília Stegophilinae.

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Section: Stegophilinaesupporting

confidence: 88%

Section: Stegophilinaementioning

confidence: 84%

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Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

2010

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“…Teeth are absent in adults of the more basal callichthyids, while simple conical teeth have been found in small juveniles (Huysseune and Sire, 1997a). While many genera of the basal loricarioid trichomycterids have rather conical teeth, Henonemus has (unicuspid) recurved teeth, reminiscent of loricariid teeth (DoNascimiento and Provenzano, 2006).Loricariidae are able to attach onto surfaces using a not well understood process allowing respiration during attachment, and scrape off algae and other food with their ventrally oriented upper and lower jaws. Ono (1980) and Roberts (1982) described unicellular keratinous lip projections or ''unculi'' on the surface of the expanded lower lip of loricariids.…”

mentioning

confidence: 99%

Morphology and development of teeth and epidermal brushes in loricariid catfishes

Geerinckx

Poorter

Adriaens

2007

Journal of Morphology

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Loricariidae or suckermouth armored catfishes are one of several aquatic taxa feeding on epilithic and epiphytic algae. Their upper and lower jaws bear exquisitely curved teeth, which usually are asymmetrically bicuspid. The enlarged lower lip carries papillae with keratinous unicellular epidermal brushes or unculi. Teeth, and probably unculi too, assist in scraping food off substrates. Their morphology, growth, and replacement is examined and compared among several loricariid species, using cleared and stained specimens, serial sections, and SEM. Apart from the general tooth form and crown shape, the anterior layer of soft tissue on the lower shaft region, present in several species, appears to be a specialization for enhancing the mobility of individual teeth when scraping on uneven surfaces. During early ontogeny, a transition from simple conical to mature tooth occurs. The first unculi appear together with the first teeth carrying a bicuspid crown, 2 days after the first exogenous feeding, but synchronous with the complete resorption of the yolk sac.

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“…There has been a complementary description of Haemomaster (Schmidt, 1985), a description of a new genus (Megalocentor de Pinna & Britski, 1991), a survey of the species in Venezuela (DoNascimiento, 2001), a taxonomic revision of Homodiaetus (Koch, 2002), another of Ochmacanthus (Santos Neto, 2014) and a new species of Henonemus (DoNascimiento & Provenzano, 2006). Monophyly of the Stegophilinae, initially based on a number of synapomorphies as per Baskin (1973) was stripped of some of its support as characters were found to apply to groups more or less inclusive than the limits of the subfamily (de Pinna & Britski, 1991).…”

Section: Resultsmentioning

confidence: 99%

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.

show abstract

The Genus Henonemus (siluriformes: Trichomycteridae) with a Description of a New Species from Venezuela

Cited by 9 publications

References 5 publications

Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

Morphology and development of teeth and epidermal brushes in loricariid catfishes

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

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