154 research outputs found
Estudio de la dentición en peces caracoideos de la República Argentina
Fil: Miquelarena, Amalia MarÃa. UNLP. FCNy
Sobre dos especies argentinas de Batrachoidedae [Pisces Batrachoidiformes]
Fil: Menni, Roberto Carlos. CONICETFil: Miquelarena, Amalia MarÃa. UNLP. FCNyM; CONICE
Peces anuales de la Argentina
Fil: Miquelarena, Amalia MarÃa. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División ZoologÃa Vertebrados; Argentin
Actinopterygii, Characiformes, Characidae: <i>Ectrepopterus uruguayensis</i> (Fowler, 1943): New record for Argentina
The monotypic genus Ectrepopterus Fowler was recently resurrected by Malabarba et al. (2012) for Megalamphodus uruguayensis Fowler, a small-sized fish (up to 47.4 mm SL) which habit the Uruguayan drainages (figure 7 of Malabarba et al. 2012). Diagnostic characters for genus include: i) an incomplete foramen in posterior region of metapterygoid, that serves as passage for the ramus mandibularis of the trigeminus nerve, bordered posteriorly by the hyomandibula and forming an incomplete arch; ii) pectoral-fin rays bearing hooks; iii) posterior margin of second infraorbital posteroventrally oblique and second infraorbital ventrally bordering anterior region of third infraorbital; iv) fourth infraorbital more developed longitudinally than dorsoventrally; v) ascending process of premaxilla reaching just anterior end of nasal, vi) and lateral line interrupted (Malabarba et al. 2012).Facultad de Ciencias Naturales y Muse
Catálogo de ejemplares tipo de la colección ictiológica del Museo de La Plata. Adenda 2015
Fil: Miquelarena, Amalia MarÃa. División ZoologÃa Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Nadalin, Diego Oscar. División ZoologÃa Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin
Comparative study of the caudal skeleton in Argentine characoid fishes. III. Families Serrasalmidae, Gasteropelecidae, Erythrinidae, Anostomidae, Hemiodidae, Curimatidae and Characidiidae
This paper is the last part of a comparative study of the caudal skeleton in South American Characoidei. Following the Monod’s system (1967, 1968), the morphology of the urophoral complex is studied in seven families. Possible phylogentic relationships among the studied entities are suggested. The diagnostic values, at a familiar and even generical level of the urophoral complex, is confirmed in a high number of South American species. These are arranged according Gery’s classification.Contribución CientÃfica Nº 254 del Instituto de LimnologÃa «Dr. R. A. Ringuelet» (UNLP-CONICET) y Nº 52 del Laboratorio de IctiologÃa (Museo de La Plata).Facultad de Ciencias Naturales y Muse
Comparative study of the caudal skeleton in Argentine Characoid. II. Family Characidae
This paper is part of a comparative study of the caudal skeleton in South American Characoidei. Following the Monod’s system (1967, 1968), the morphology of the urophoral complex is studied in thirty two species of the family Characidae. Possible phylogenetic relationships between the studied entities are suggested. The diagnostic value on: a familiar and even generical level, of the urophoral complexe is confirmed in a high number of South American species. These are arranged according to Gery’s classification (1972).Contribución cientÃfica Nº 181 del Instituto de LimnologÃa (ILPLA) y Nº 40 del Laboratorio de IctiologÃa del Museo de La Plata.Facultad de Ciencias Naturales y Muse
Peces de Entre RÃos
Fil: Miquelarena, Amalia MarÃa. División ZoologÃa Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin
OsteologÃa y lepidologÃa de Gymnocharacinus Bergi [Pisces Characidae]
Fil: Miquelarena, Amalia MarÃa. CONICETFil: Aramburu, Raúl Horacio. IctiologÃa y ZoologÃa de Vertebrados, Facultad de Ciencias Naturales [UNLP
Redescription of <i>Hypoptopoma inexspectata</i> (Holmberg, 1883), with notes on its anatomy (Siluriformes: Loricariidae)
Se presenta una diagnosis y redescripción de Hypoptopoma inexspectata sobre la base del examen de material adicional y comparación con sus congéneres. Esta especie de Hypoptopoma, pobremente conocida, se distribuye en las cuencas de los rÃos Paraná y Paraguay. Hypoptopoma inexspectata se diagnostica sobre la base de la autapomorfÃa ordenamiento bi-serial de los odontodes del margen rostral del hocico, extendiéndose lateralmente desde el extremo anterior hasta el lÃmite entre los infraorbitales 2 y 3; la serie dorsalmente orientada se separa de la ventralmente orientada por un área angosta libre de odontodes. Esta especie se distingue además por la combinación (1) bajo número de la serie media de placas laterales (2022, tÃpicamente 21), (2) presencia de placas prepectorales, (3) dos series de 3-5 placas abdominales, (4) distancia interorbital mÃnima 48-56 % longitud cabeza, (5) diámetro horizontal de la órbita 17-20% longitud cabeza, y (6) distancia mÃnima órbita-narina 8-12% longitud cabeza. Se reporta variación intraespecÃfica en relación con los huesos dérmicos de la cabeza, neuracráneo y suspensorio, placas dérmicas, y aleta adiposa.Hypoptopoma inexspectata is diagnosed and redescribed based on the examination of additional material and comparison with its congeners. This poorly known hypoptopomine species is distributed in the Paraguay and Paraná river draÃnages. Hypoptopoma inexspectata is diagnosable based on the autapomorphy biserial arrangement of anterior snout rostral margin odontodes, laterally extended to limit between second and third infraorbital plates, with dorsally directed dorsad series separated from ventrally directed ventrad series by a narrow odontode-free area, which at the level of first and second infraorbital plates is reduced to a dividing line of the series. The species can be further distinguished by the combination (1) low number of canal-bearing lateral plates (20-22, typically 21), (2) presence of a shield of prepectoral dermal plates, (3) arrangement of abdominal plates in one paired series of 3-5 plates, (4) shorter least interorbital distance 4856% head lengh, (5) larger horizontal eye diameter 17-20% head lengh, and (6) least orbit-nare distance 812% head lengh. Intraspecific variation skull dermal bones, neuracranium and suspensorium bones, dermal plates, adipose fin is reported.Facultad de Ciencias Naturales y Muse
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