Taxonomy of Pimelodus brevis Marini, Nichols & La Monte, 1933 (Siluriformes: Pimelodidae), an uncertain species from the rio Paraná basin

Pimelodus brevisMarini, Nichols & La Monte, 1933 was described from the río de la Plata, Departamento San Fernando, Argentina, based only on the holotype, which is missing since 1960s. This species has been cited in the literature and is considered valid despite of no voucher specimen has been found in museum. A taxonomic analysis comprising material from the rio Paraná basin provided additional specimens that made it possible to demonstrate the identity of P. brevis. Based on the original description and illustration of the holotype, we performed an allometric analysis and then we were able to compare the data with the similar sympatric congeners. Those comparisons allowed us to conclude that P. brevisis a junior synonym of P. argenteusPerugia, 1891, described from the río Paraná, Colonia Resistencia, Argentina. Comments on the status of congeners and taxonomic recommendations are provided.

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A new species of Leporinus Agassiz, 1829 from the upper Rio Paraná basin (Characiformes, Anostomidae) with redescription of L. elongatus Valenciennes, 1850 and L. obtusidens (Valenciennes, 1837)

Papéis Avulsos de Zoologia ◽

10.1590/s0031-10492012021700001 ◽

2012 ◽

Vol 52 (37) ◽

pp. 441-475 ◽

Cited By ~ 19

Author(s):

Heraldo A. Britski ◽

José Luís O. Birindelli ◽

Julio Cesar Garavello

Keyword(s):

New Species ◽

River Basins ◽

Type Specimens ◽

La Plata ◽

Paraná Basin ◽

Parana Basin ◽

River Drainages ◽

A New Species

Leporinus obtusidens Valenciennes, 1837 and L. elongatus Valenciennes, 1850 are redescribed based on the type specimens, including those of their junior synonyms, and recently collected specimens. Leporinus obtusidens is considered to be widespread, occuring in the river drainages of La Plata, São Francisco, and Parnaíba. Leporinus aguapeiensis Campos, 1945, described from the upper Rio Paraná, and L. silvestrii Boulenger, 1902, described from the Rio Paraguay, are considered junior synonyms of L. obtusidens. Leporinus elongatus is endemic to the Rio Jequitinhonha and Rio Pardo, two eastern Brazilian river basins, and the locality cited for the lectotype, Rio São Fransico, likely to be erroneous. Leporinus crassilabris Borodin, 1929, and L. crassilabris breviceps Borodin, 1929, both described from the Rio Jequitinhonha, are considered junior synynoms of L. elongatus. A new species of Leporinus, endemic to the upper Rio Paraná, very similar and sometimes mistaken with L. obtusidens, is formally described. In addition, comments on Leporinus pachyurus Valenciennes, 1850 and on L. bimaculatus Castelnau, 1855 are provided, and a lectotype for L. bimaculatus is selected.

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Taxonomy of 'Euconnus complex'. Part XIV. Diarthroconnus is removed from synonymy with Psomophus and placed as a junior synonym of Euconnus s. str. (Coleoptera, Staphylinidae, Scydmaeninae)

Zootaxa ◽

10.11646/zootaxa.4317.1.12 ◽

2017 ◽

Vol 4317 (1) ◽

pp. 191 ◽

Cited By ~ 3

Author(s):

PAWEŁ JAŁOSZYŃSKI

Keyword(s):

Original Description ◽

Junior Synonym ◽

Diagnostic Character ◽

European Species ◽

Infraspecific Taxon ◽

Type Series ◽

Complex Part ◽

The Status

Diarthroconnus Ganglbauer, a subgenus of Euconnus Thomson, was proposed 117 years ago to accommodate one bizarre European species, E. birnbacheri Ganglbauer. Nine-segmented antennae with club composed of two terminal antennomeres was the main diagnostic character of the species and subgenus. Later authors interpreted this feature as a teratological abnormality, and E. birnbacheri as a junior synonym or an infraspecific taxon of E. intrusus Schaum. This led to listing Diarthroconnus as a junior synonym of Psomophus Casey in all existing catalogs, the latter being a subgenus of Euconnus to which E. intrusus belongs. However, since Ganglbauer's publication the type series of E. birnbacheri has not been studied and all taxonomic actions were results of interpreting his original description. Two syntypes of E. birnbacheri were recently rediscovered, and it was possible to clarify the status of Diarthroconnus. Euconnus birnbacheri was identified as identical with Euconnus (s. str.) fimetarius (Chaudoir), and consequently Diarthroconnus is removed from synonymy with Psomophus and placed as a junior synonym of Euconnus s. str. A lectotype is designated for Euconnus birnbacheri.

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