A taxonomic review of the vampire catfish genus Paracanthopoma Giltay, 1935 (Siluriformes, Trichomycteridae), with descriptions of nine new species and a revised diagnosis of the genus

Pinna, Mário C. C. de; Dagosta, Fernando César Paiva

doi:10.11606/1807-0205/2022.62.072

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…These labial teeth can be seen in the two species herein described (Figure 9) and occur independently in other trichomycterids, such as Tridensimilis venezuelae (Schultz, 1944), and in some stegophilines (DoNascimiento, 2015). The presence of a free gill membrane across the isthmus is confirmed in both species and is also seen in Tridensimilis (Schultz, 1944), Tridentopsis (Azpelicueta, 1990; Myers, 1925) and other members of Trichomycteridae ( e.g ., Dagosta & de Pinna, 2021; Henschel et al ., 2021; Myers & Weitzman, 1966; de Pinna & Dagosta, 2022). The maxillary and rictal barbels are poorly developed in some tridentines, which led Baskin (1973) to consider that the latter are not externally visible in species of Tridens, Tridensimilis and Tridentopsis and Eigenmann (1918, Plate XLIII, Figures 1 and 2) to represent a paratype of T. melanops without rictal barbels, as opposed to his text and to the original description of T. melanops published earlier by himself (Eigenmann & Eigenmann, 1889).…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, T. chicomendesi is so far only known from its type locality, increasing its vulnerability to any human‐related environmental disturbance. Considering the raising interest in the taxonomy and systematics of miniature siluriforms ( e.g ., Calegari et al ., 2014; Calegari & Reis, 2017; Carvalho et al ., 2016; Rocha et al ., 2012), and, more specifically, miniature trichomycterids ( e.g ., Henschel et al ., 2018; Henschel, Bragança et al ., 2020; Henschel, Lujan et al, 2020; de Pinna & Dagosta, 2022), even more advances in the knowledge of miniature species can be expected.…”

Section: Discussionmentioning

confidence: 99%

“…The rich natural histories underlying the striking diversity of these subfamilies led to a significant increase in the number of taxonomic works concerning the family, revealed by the description of 123 species of trichomycterids in the last 10 years (Fricke et al ., 2022). Nonetheless, these data hide an important collection and publication bias that affects studies focused on Trichomyteridae: most concern the diversity of trichomycterines from southern and southeastern Brazil ( e.g ., Costa et al ., 2022; Costa, Henschel et al ., 2020; Costa & Katz, 2021b; Reis et al ., 2022), with fewer efforts directed to members of the TSVSG‐clade, such as vandelliines (Dagosta & de Pinna, 2021; Henschel et al ., 2021; Henschel et al ., 2022; de Pinna & Dagosta, 2022) and sarcoglanidines (Costa et al ., 2019; Henschel, Bragança et al ., 2020; Henschel, Lujan et al, 2020; Canto et al ., 2022).…”

Section: Introductionmentioning

confidence: 99%

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Two new miniature translucent catfish species of the rare genus Tridens (Siluriformes: Trichomycteridae) from the Madeira River basin, northern Brazil

Henschel

Ohara

Costa

2023

Journal of Fish Biology

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Two new miniature species of the trichomycterid genus Tridens are described from the Madeira River drainage, Acre and Rondônia States, Brazil. Until this work, Tridens was a monotypic genus composed solely of Tridens melanops, from the Putumayo/Içá River drainage, upper Amazonas River basin. Tridens vitreus sp.n. is known from upper and middle Madeira River drainage and differs from all other congeners by the lack of pelvic fins and girdle and by vertebra and dorsal-fin ray counts. Tridens chicomendesi sp.n. is known from Abunã River, middle Madeira River drainage and is distinguished from all other congeners by the number of vertebrae, dorsal-fin ray count and anal-fin base colouration pattern. Tr. chicomendesi sp.n. is further distinguished from T. vitreus by a combination of character states regarding the position of urogenital opening, dorsal-fin position, anal-fin position, maxillary barbel length, number of premaxillary teeth, numberof dorsal-fin rays, number of anal-fin rays, number of lateral-line system pores, frontal bone anatomy, degree of ossification of maxilla, anatomy of quadrate-hyomandibular joint, size of posterodorsal process of hyomandibula, length of opercular patch of odontodes, number of interopercular odontodes, proportion of upper hypural plate cartilage relative to its area ; by the absence of a proximal, distal and ventral cartilages on ventral hypohyal; by the absence of a lateral process on basibranchial 4; by the presence of a cartilage block on the lateral process of autopalatine, the presence of a well-developed ossification on proximal margin of ventral hypohyal, the presence of hypobranchial foramen; and by the presence of an anterior cartilaginous joint between quadrate and base of posterodorsal process of hyomandibula. This work represents the first species description for the subfamily Tridentinae in more than 30 years and for the genus Tridens since its original description in 1889.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two new miniature translucent catfish species of the rare genus Tridens (Siluriformes: Trichomycteridae) from the Madeira River basin, northern Brazil

Henschel

Ohara

Costa

2023

Journal of Fish Biology

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Anatomy, ecology, and behavior of a new species of Scleronema Eigenmann, 1917 (Siluriformes: Trichomycteridae) from coastal drainages in the southern Brazilian Atlantic Rainforest, with comments on the monophyly and phylogeny of the genus

Bockmann

Ferrer

Rizzato

et al. 2023

Zootaxa

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A new species of Scleronema (Trichomycteridae) is described from the lowlands of three coastal river basins in the Atlantic Forest of the Santa Catarina state, Southern Brazil. Aspects of the anatomy, reproduction, diet, feeding behavior and habitat of the new species are described and discussed in comparison with related taxa. The conservation status of the new species, which currently faces several threats due to environmental impacts on its region of occurrence, is established. Based on characteristics observed in the new species, as well as in most of its congeners, the phylogenetic position and monophyly of Scleronema are discussed and traits considered synapomorphic for the subgenera Plesioscleronema and Scleronema are reviewed. The monophyly of the genus Scleronema is supported by a new synapomorphy. In addition, two new synapomorphies, one of which based on behavior, are suggested for the subgenus Scleronema, justifying the inclusion of the new species. Within the subgenus Scleronema, the new species is assigned to the S. minutum group, which currently includes the majority of species of the genus, due to the presence of synapomorphic traits related to the body shape, maxillary barbel, skin flap of the opercle, caudal and pectoral fins, as well as osteological features of the lower jaw, hyoid arch, and postcranial axial skeleton. The species herein described differs from all its congeners by a combination of characters from various morphological complexes, which are described in detail using different methodologies, including radiography, whole-specimen clearing and double-staining procedures, and tridimensional computer nanotomography (3D nano-CT).

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A new long-snouted Corydoras (Siluriformes: Callichthyidae) from the rio Xingu and rio Tapajós basins, Brazilian Amazon

Tencatt,

Couto,

Santos

et al. 2024

Neotrop. ichthyol.

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A new species of Corydoras is described from the rio Xingu and rio Tapajós basins, Pará State, Brazil. The new species can be promptly distinguished from its congeners by the combination of the following features: (I) temporal sensory canal at sphenotic with two pores; (II) upper tooth plate of branchial arch with three or four series of teeth; (III) area at the corner of the mouth, ventral to the maxillary barbel, with a small, roughly triangular fleshy flap, not forming an elongated barbel-like structure; (IV) contact between posterior process of the parieto-supraoccipital and nuchal plate; (V) dark stripe transversally crossing the orbit, forming a mask-like blotch; (VI) absence of a distinct color pattern along midline of flank; (VII) dorsolateral body plates only with small, irregular, rounded or vertically elongated dark brown or black blotches; ground color of plates typically dusky but not forming large, conspicuous black patches; and (VIII) absence of a relatively large, conspicuous dark patch on anterior portion of dorsal fin.

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A taxonomic review of the vampire catfish genus Paracanthopoma Giltay, 1935 (Siluriformes, Trichomycteridae), with descriptions of nine new species and a revised diagnosis of the genus

Cited by 3 publications

References 32 publications

Two new miniature translucent catfish species of the rare genus Tridens (Siluriformes: Trichomycteridae) from the Madeira River basin, northern Brazil

Two new miniature translucent catfish species of the rare genus Tridens (Siluriformes: Trichomycteridae) from the Madeira River basin, northern Brazil

Anatomy, ecology, and behavior of a new species of Scleronema Eigenmann, 1917 (Siluriformes: Trichomycteridae) from coastal drainages in the southern Brazilian Atlantic Rainforest, with comments on the monophyly and phylogeny of the genus

A new long-snouted Corydoras (Siluriformes: Callichthyidae) from the rio Xingu and rio Tapajós basins, Brazilian Amazon

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