ABSTRACT
The only species of previously named Myrsidea Waterston, 1915 from Neotropical jays of the genus Cyanocorax Boie (Passeriformes: Corvidae), Myrsidea fallax Kéler, 1938 (type-host Cyanocorax cyanomelas Vieillot), is redescribed and six new species of lice in the genus Myrsidea are described: Myrsidea pseudofallax n. sp. [type-host C. c. chrysops (Vieillot)]; M. moriona n. sp. [type-host C. m. morio (Wagler)]; Myrsidea daleclaytoni n. sp. [type-host C. v. violaceus Du Bus de Gisignies]; Myrsidea lindolphoi n. sp. [type-host C. caeruleus (Vieillot)]; Myrsidea melanocyanei n. sp. [type-host C. melanocyaneus chavezi (Miller & Griscom)]; and Myrsidea cristatelli n. sp. [type-host C. cristatellus (Temminck)]. A key to the identification of both sexes of these seven species is provided. Immature stages of M. daleclaytoni n. sp. (all instars) and M. cristatelli n. sp. (nymph III) are described. External chorionic architecture of the eggs is described and illustrated for six Myrsidea spp. from corvine birds: M. picae (Linnaeus, 1758) ex Pica p. pica L.; M. cornicis (DeGeer, 1778) ex Corvus c. corone L.; M. isostoma (Nitzsch in Giebel, 1866) ex Co. f. frugilegus L.; M. interrupta (Osborn, 1896) ex Co. brachyrhynchus Brehm; M. fallax ex Cy. cyanomelas; and M. moriona n. sp. ex Cy. m. morio. This is the first review of the data on Myrsidea spp. infesting Neotropical Corvidae.
Subject(s)
Passeriformes/parasitology , Phthiraptera/anatomy & histology , Phthiraptera/classification , Animals , Chorion/ultrastructure , Female , Male , Phthiraptera/physiology , Phthiraptera/ultrastructure , South America , Species SpecificityABSTRACT
A new genus of chewing louse as Bobdalgleishia, and its type species Bobdalgleishia stephanophallus sp. n. (Phthiraptera) belonging to the Brueelia-complex (Ischnocera: Philopteridae) are described. Adults of the new species are fully described, illustrated and compared morphologically with the type species of Motmotnirmus Mey & Barker, 2014, which is its closest relative. The type host of Bobdalgleishia stephanophallus is a subspecies of the great jacamar Jacamerops aureus ridgwayi Todd, 1943, an endemic Amazonian bird distributed in northern Brazil, and the type locality is the State of Pará. Bobdalgleishia is a remarkable genus with unique morphological and chaetotaxic characters which readily separate it from other members of the Brueelia-complex, in particular by having the first two marginal temporal and ocular setae very long.
ABSTRACT
The aim of this study was to describe the annual activity cycle, the sex ratio, and the relationship between the weather variables and activity density of the 16 most abundant carabid species of a typical southeastern region of Pampasia, Argentina. The study focused on the southernmost Celtis ehrenbergiana (Klotzsch) Liebmann ( = C. tala Guillies ex Planch) native forest of the region, from March 2008 to March 2009, a period during which there was a marked draught associated with the La Niña phenomenon. Forty-five pitfall traps were emptied once every 2 wk, and the occurrence of larvae, tenerals, and subtenerals was recorded. Photoperiod, temperature, and precipitations explained 35% of the total variation in the catch. Total carabid activity was high in early autumn and late spring. Eight species reached their maximum activity in spring, five in winter, two in summer, and one in autumn. Possible reproductive strategies, the influence of different variables involved in the life cycles of the species, and the sex ratio and their limitations are discussed.
Subject(s)
Coleoptera/classification , Coleoptera/physiology , Animals , Argentina , Droughts , Ecosystem , Forests , Life Cycle Stages , Photoperiod , Population Density , Reproduction/physiology , Seasons , Sex Ratio , Ulmaceae , WeatherABSTRACT
We studied a collection of lice from Argentina, Brazil, Paraguay and Chile containing all four known species and one new species (described herein) in the genus Tinamotaecola, parasites of birds of the families Cariamidae and Tinamidae. We also (1) describe previously unknown second and third nymphal instars of two Tinamotaecola species, (2) discuss hosts and geographical ranges for all Tinamotaecola species, and (3) speculate on possible macroevolutionary events that may explain the current distribution of these lice on their respective avian hosts.
Subject(s)
Bird Diseases/parasitology , Ischnocera/classification , Lice Infestations/veterinary , Animal Distribution , Animal Structures/anatomy & histology , Animal Structures/growth & development , Animals , Argentina , Birds , Body Size , Brazil , Chile , Female , Ischnocera/anatomy & histology , Ischnocera/growth & development , Lice Infestations/parasitology , Male , Organ Size , ParaguayABSTRACT
A new species of the genus Brueelia Kéler is described as parasitic on the Common Diuca-Finch, Diuca diuca diuca, based on specimens from three localities in Chile: Punitaqui (Coquimbo Province), La Rinconada (Colchagua Province) and Chillán (Nuble Province). The species is fully described and illustrated, and brief comments on its morphological affinities with allied species are also made.
Subject(s)
Finches/parasitology , Phthiraptera/classification , Animals , Chile , Phthiraptera/anatomy & histologyABSTRACT
A new species of the genus Brueelia Kéler is described as parasitic on the Common Diuca-Finch, Diuca diuca diuca, based on specimens from three localities in Chile: Punitaqui (Coquimbo Province), La Rinconada (Colchagua Province) and Chillán (Ñuble Province). The species is fully described and illustrated, and brief comments on its morphological affinities with allied species are also made.
Se describe una nueva especie del genero Brueelia Kéler parasitando a la diuca, Diuca diuca diuca, basado en especimenes de tres localidades de Chile: Punitaqui (Coquimbo Province), La Rinconada (Colchagua Province) y Chillán (Ñuble Province). La especie es descrita e ilustrada comentando sus semejanzas morfológicas con especies afines.
Subject(s)
Animals , Finches/parasitology , Phthiraptera/classification , Chile , Phthiraptera/anatomy & histologyABSTRACT
The new species Aquanirmus major Cicchino & González Acuña found on the Great Grebe, Podiceps major, from different localities of Argentina and Chile, is described and illustrated, giving comments on its affinities and differences with the remaining three species included in the Aquanirmus emersoni-species complex.
Subject(s)
Birds/parasitology , Phthiraptera/classification , Phthiraptera/physiology , Animals , Argentina , Chile , Female , Male , Phthiraptera/anatomy & histologyABSTRACT
The new species Aquanirmus major Cicchino & González Acuña found on the Great Grebe, Podiceps major, from different localities of Argentina and Chile, is described and illustrated, giving comments on its affinities and differences with the remaining three species included in the Aquanirmus emersoni-species complex.
Se describe e ilustra la nueva especie Aquanirmus major Cicchino & González Acuña hospedada en ejemplares de Podiceps major provenientes de distintas localidades de Argentina y Chile, entregando afinidades y diferencias con las restantes tres especies incluidas en el complejo A. emersoni.
Subject(s)
Animals , Female , Male , Birds/parasitology , Phthiraptera/classification , Phthiraptera/physiology , Argentina , Chile , Phthiraptera/anatomy & histologyABSTRACT
En este trabajo se analizó la influencia del sexo y la edad sobre la prevalencia parasitaria anual, mensual y estacional registrada en Argentina: ...
Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Adolescent , Lice Infestations/epidemiology , Epidemiologic Factors , SeasonsABSTRACT
En este trabajo se analizó la influencia del sexo y la edad sobre la prevalencia parasitaria anual, mensual y estacional registrada en Argentina: ...
Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Adolescent , Lice Infestations/epidemiology , Epidemiologic FactorsABSTRACT
Se estudió la prevalencia de la Pediculosis capitis como enfermedad parasitaria durante el año calendario 1-8-1992 al 31-7-1993, en la Región Sanitaria XI de la provincia de Buenos Aires, Argentina, que comprende 15 partidos del Este Noreste de la provincia de Buenos Aires y otras zonas de influencia del Hospital Interzonal de Agudos, Especialidad Pediatría "Sor María Ludovica", cabecera de dicha Región Sanitaria. Se examinaron un total de 552 individuos de nivel social medio a medio bajo de la población infanto-juvenil de 0 a 16 años, tomados al azar en 52 muestreos semanales consecutivos, considerándose como positivos para esta enfermedad a aquellos parasitados al momento del diagnóstico. Los resultados se expresan en términos de prevalencia analizándose su variación mensual y estacional. La prevalencia fue relativamente alta en todos los meses, con valores mínimos en febrero (12 por cento) y máximos en agosto (56,8 por cento), siendo la media anual de 38, 04 por cento (+/- 4,05). Estacionalmente, su menor valor corresponde al Verano (16,8 por cento), siendo muy semejantes los valores para las restantes estaciones, manteniéndose siempre superiores al 38 por cento
