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182 resultados encontrados para: AUTOR: Salazar Vallejo, Sergio I.
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1.
Artículo
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A new species of Travisia (Annelida, Travisiidae) from Campos Basin, Brazil
Rizzo, Alexandra Elaine (autora) ; Salazar Vallejo, Sergio I. (autor) ;
Contenido en: Studies on Neotropical Fauna and Environment (May 2020), páginas 1-9 ISSN: 0165-0521
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Resumen en: Inglés |
Resumen en inglés

Travisia Johnston, 1840 is the only genus of the family Travisiidae Hartmann-Schröder, 1971. Travisiid species have body relatively short, papillated, fusiform, often tapered anteriorly and posteriorly, and swollen medially. They are found mainly in deep-sea sediments. Several faunistic accounts from different locations in the Brazilian coast have included records of Travisia species that need to be reassessed. The aim of this study was to describe Travisia araciae n. sp., a new species from Campos Basin, off Rio de Janeiro, Southern Brazil. The new species differs from other similar species by having 23 pairs of branchiae from chaetiger 2, and interramal pores from chaetiger 1. An updated key to identification for all species in the genus is also included.


2.
Artículo
Review of Dalhousiella McIntosh, 1901 (Annelida: Hesionidae)
Salazar Vallejo, Sergio I. (autor) ; Rizzo, Alexandra E. (autor) ;
Disponible en línea
Contenido en: Cahiers de Biologie Marine Volumen 61 (2020), p. 299-309 ISSN: 2262-3094
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Resumen en: Inglés | Frances |
Resumen en inglés

Among hesionid annelid genera, Dalhousiella McIntosh, 1901 is a poorly known abyssal group. For example, the delineation of species belonging to it has not been settled, and the affinities to other hesionin genera deserve clarification. Further, type material for the type species, D. carpenteri McIntosh, 1901 is lost, and the only syntype available of the second species, D. hesionoides (Augener, 1906) is partially dried-out. In order to clarify the generic delineation, non-type specimens of both species were studied. This allowed us to understand the development of nuchal organs, redelineate the morphological pattern for the genus group name, and characterize the morphology of the two known species. The lack of topotype specimens made us postpone the proposal of a neotype for the type species. A key for identifying Dalhousiella species might help assess their presence in other oceanic basins.

Resumen en frances

Revue de Dalhousiella McIntosh, 1901 (Annelida : Hesionidae). Parmi les genres des polychètes Hésionidés, Dalhousiella McIntosh, 1901 est un groupe abyssal très peu connu. Par exemple, la définition des espèces qui appartiennent à ce genre n’a pas été résolue, et les affinités avec d’autres genres de la famille méritent d’être éclaircies. En outre, le matériel type de l’espèce type, D. carpenteri McIntosh, 1901 est perdu, et le seul syntype disponible de la deuxième espèce, D. hesionoides (Augener, 1906) est partiellement desséché. Pour clarifier la définition du genre, des spécimens non-type des deux espèces ont été étudiés. Cela nous a permis de clarifier le développement des organes nuchaux, redélimiter le modèle morphologique pour le genre, et clarifier la morphologie des deux espèces connues. Le manque de spécimens de la localité du type nous a amené à proposer un néotype pour l’espèce type. Une clef pour identifier les espèces du genre Dalhousiella est proposée pour aider à évaluer leur présence dans les autres bassins océaniques.


3.
Artículo
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Revision of Leocrates kinberg, 1866 and Leocratides ehlers, 1908 (Annelida, Errantia, Hesionidae)
Salazar Vallejo, Sergio I. (autor) ;
Contenido en: Zootaxa Vol. 4739, no. 1 (February 2020), p. 1-114 ISSN: 1175-5334
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Resumen en: Inglés |
Resumen en inglés

Leocrates Kinberg, 1866 and Leocratides Ehlers, 1908 are two genera of hesionid errant annelids (Hesionidae, Hesioninae) whose species have 16 chaetigers (21 segments). Leocrates species are free living in rocky or mixed bottoms, whereas Leocratides species are usually symbiotic with hexactinellid sponges. Marian Pettibone revised both genera as part of the R/V Siboga Expedition monographs 50 years ago, and most of her ideas have remained unchallenged regarding synonymy for genera and species. For example, she included three genera as junior synonyms of Leocrates: Lamprophaes Grube, 1867, Tyrrhena Claparède, 1868, and Dalhousia McIntosh, 1885, and from 21 nominal species, she regarded only eight as valid. In this revision, all material available was studied, and different morphological patterns were noted in nuchal organs lobes, pharynx armature, and chaetal features. Leocratides species belong to a single pattern; however, in Leocrates several patterns were detected. Three patterns are present for nuchal organs lobes: barely projected posteriorly (horizontal C-shaped), markedly projected posteriorly (U-shaped), and with lateral transverse projections (L-shaped). In the pharynx, upper jaws were noted as single, fang-shaped, or as double, T-shaped structures, whereas the lower jaw can be single, fang-shaped, or a transverse plate. Neurochaetal blades can be bidentate with guards approaching subdistal tooth, unidentate without guards, or with guards hypertrophied projected beyond distal tooth.

The combinations of these features are regarded as different genera and consequently, Leocrates is restricted (including Tyrrhena), but Dalhousia, and Lamprophaea (name corrected) are reinstated, and three new genus-group names are proposed: Paradalhousia n. gen., Paralamprophaea n. gen., and Paraleocrates n. gen. Further, the standardization of morphological features allowed several modifications and the recognition of novelties. Thus, four type species were redescribed, four others were reinstated, 10 were newly combined, and 18 from different World localities are described as new. The new species are Lamprophaea cornuta n. sp. from the French Polynesia, L. ockeri n. sp. from the Hawaiian Islands, L. paulayi n. sp. from the Red Sea, L. pettiboneae n. sp. from the Marshall Islands, L. pleijeli n. sp. from La Réunion, L. poupini n. sp. from the French Polynesia, Leocrates ahlfeldae n. sp. from India, L. harrisae n. sp. from the Revillagigedo Islands, L. mooreae n. sp. from New Caledonia, L. reishi n. sp. from the Marshall Islands, L. rizzoae n. sp. from the Seychelles Islands, L. rousei n. sp. from Papua New Guinea, L. seidae n. sp. from the French Polynesia, Leocratides jimii n. sp. from Madagascar, Paralamprophaea bemisae n. sp. from the Maldives, P. crosnieri n. sp. from Madagascar, P. leslieae n. sp. from Kiribati, and P. meyeri n. sp. from the French Polynesia. However, Leocrates japonicus Gustafson, 1930 is a nomen nudum. Keys are included for identifying all hesioninae genera, and for all species in all the included genera.


4.
Artículo
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Resumen en: Inglés |
Resumen en inglés

Sigambra grubii Müller, 1858 has been reported from many different coastal environments in Brazil and the Grand Caribbean. However, more than one species was thought to be included under this species group name. After the study of several subtle and consistent differences in specimens fitting the description S. grubii, a new Grand Caribbean species is herein recognized and described as S. hernandezi sp. nov. Further, the study of other Sigambra specimens prompted the examination of type specimens of S. bassi (Hartman, 1947), and of S. wassi Pettibone, 1966 to clarify some morphological features, and three other new species are recognized and newly described: S. diazi sp. nov. and S. ligneroi sp. nov. from the southeastern Caribbean (Venezuela), and S. olivai sp. nov. from the northwestern Caribbean (México). Morphological features are also clarified for S. grubii by comparison with specimens from the type locality, Florianópolis, Brazil, and with type specimens of S. bassi from Florida (U.S.A.), and non-type specimens of S. wassi from Virginia (USA). A key to identify all species of Sigambra is also included.


5.
Artículo
Phylogeny of Microphthalminae hartmann-Schröder, 1971, and revision of Hesionella hartman, 1939, and Struwela hartmann-Schröder, 1959 (Annelida, Errantia)
Salazar Vallejo, Sergio I. (autor) ; León González, Jesús Ángel de (autor) ; Carrera Parra, Luis Fernando (autor) ;
Disponible en línea
Contenido en: PeerJ Volumen 7, número e7723 (2019), p. 1-35 ISSN: 2167-8359
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Resumen en: Inglés |
Resumen en inglés

Microphthalminae Hartmann-Schröder, 1971 was proposed in Hesionidae to include Microphthalmus and Hesionides; however, the affinities of these genera to other members of Hesionidae have been debated, and some authors have concluded they donot belong in Hesionidae. Herein, based on morphological characters, a phylogenetic analysis of the subfamily and some other similar poorly-known genera, with anuncertain position in Hesionidae was performed to clarify their affinities. Our results indicate that Microphthalminae, as currently delimited, is paraphyletic. The inclusion of Struwela, Uncopodarke, and Westheideius, a new genus, as well as the recognition of Fridericiella are proposed to meet the requirement of monophyly; and as result of this, the elevation in rank to the family level is herein presented. Furthermore, the type species for Hesionella and Struwela are redescribed, and a new species in the latter is described. A key to identify microphthalmid genera is also included.


6.
Artículo
Revision of Fauveliopsidae Hartman, 1971 (Annelida, Sedentaria)
Salazar Vallejo, Sergio I. (autor) ; Zhadan, Anna E. (autora) ; Rizzo, Alexandra E. (autora) ;
Contenido en: Zootaxa Vol. 4637, no. 1 (2019), p. 1–67 ISSN: 1175-5334
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Resumen en: Inglés |
Resumen en inglés

Abyssal polychaetes are usually difficult to be identified because they are small, their body patterns differ from their shallow water relatives, their delicate bodies are often damaged during sampling and sieving, and their taxonomy is in need of revision. Members of the family Fauveliopsidae Hartman, 1971 are widespread in deep ocean basins and they follow the above statements. In this contribution, we present a revision of all available type and non-type material for the family. Our objective is to provide keys to identify genera and species, as well as standardized diagnoses, and illustrations for most species, excluding those described since 2011, or where type material was not available. One genus, Riseriopsis n. gen., is proposed and four species are newly described. The Fauveliopsidae now includes 24 species in three genera: Fauveliopsis McIntosh, 1922 (13 species), Laubieriopsis Petersen, 2000 (8 species), and Riseriopsis n. gen. (3 species). Fauveliopsis includes species usually living inside gastropod or scaphopod shells or foraminiferan tubes, Laubieriopsis and Riseriopsis include species commonly regarded as free living, although some species of the latter have very long bodies and have been found inside soft tubes.

Fauveliopsis includes: F. adriatica Katzmann & Laubier, 1974, F. armata Fauchald & Hancock, 1981, F. brattegardi Fauchald, 1972a, F. brevipodus Hartman, 1971, F. challengeriae McIntosh, 1922, F. glabra (Hartman in Hartman & Barnard, 1960), F. jameoaquensis Núñez in Núñez, Ocaña & Brito, 1997, F. levensteinae n. sp., F. magalhaesi n. sp., F. magna Fauchald & Hancock, 1981, F. olgae Hartmann-Schröder, 1983, F. rugosa Fauchald, 1972b, and F. scabra Hartman & Fauchald, 1971. Laubieriopsis includes: L. arenicola (Riser, 1987), L. blakei n. sp., L. brevis (Hartman, 1965), L. cabiochi (Amoureux, 1982), L. fauchaldi (Katzmann & Laubier, 1974) n. comb., L. hartmanae (Levenstein, 1970) reinst., L. norvegica Zhadan & Atroshchenko, 2012, and L. petersenae Magalhães, Bailey-Brock & Rizzo, 2014. Riseriopsis includes: R. arabica (Hartman, 1976) n. comb., R. confusa (Thiel, Purschke & Böggemann, 2011) n. comb., and R. santosae n. sp.


7.
- Artículo con arbitraje
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Worming its way into Patagonia: an integrative approach reveals the cryptic invasion by Eulalia clavigera (Annelida: Phyllodocidae)
Langeneck, Joachim ; Diez, María Emilia (coaut.) ; Nygren, Arne (coaut.) ; Salazar Vallejo, Sergio I. (coaut.) ; Carrera Parra, Luis Fernando (coaut.) ; Vega Fernández, Tomás (coaut.) ; Badalamenti, Fabio (coaut.) ; Castelli, Alberto (coaut.) ; Musco, Luigi (coaut.) ;
Contenido en: Marine Biodiversity Vol. 49, no. 2 (April 2019), p. 851-861 ISSN: 1867-1616
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Resumen en: Inglés |
Resumen en inglés

A phyllodocid polychaete belonging to the genus Eulalia is reported from Nuevo Gulf, Patagonia (South-western Atlantic Ocean) with abundant populations thriving in the intertidal zone. Morphological and molecular data allowed assigning this population to Eulalia clavigera (Audouin & Milne-Edwards, 1834), a species typically occurring along the north-eastern Atlantic coast. The absence of genetic structuring between north-eastern and south-western Atlantic E. clavigera strongly supports a non-native origin of the Patagonian population. Conversely, the majority of the Mediterranean Eulalia cf. clavigera analysed in this study turned out to belong to a different, probably undescribed species, suggesting that the diversity and taxonomy of green Eulalia is more complex than previously supposed. The high adaptation capabilities to stressed environments showed by E. clavigera, along with its possible high impact on native assemblages through predation, compel to carefully monitor its spread along the Patagonian coasts.


8.
- Artículo con arbitraje
Description of Elisesione imajimai sp. nov. from Japan (Annelida: Hesionidae) and A redescription of E. problematica (Wesenberg-Lund, 1950) and its confirmation within Hesionini
Jimi, Naoto ; Eibye Jacobsen, Danny (coaut.) ; Salazar Vallejo, Sergio I. (coaut.) ;
Contenido en: Zoological Studies Vol. 57, no. 5 (February 2018), p. 1-9 ISSN: 1810-522X
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Resumen en: Inglés |
Resumen en inglés

Elisesione imajimai sp. nov. is newly described based on specimens collected in Sagami Bay, Japan, at a depth of 150-250 m. This new species resembles E. problematica (Wesenberg-Lund, 1950) from Iceland, but differs because in E. imajimai sp. nov. the ventral cirri surpass the tips of the neurochaetal lobes, reaching to the medial part of the neurochaetal bundle; the palps are 1/2-4/5 as long as the antennae; the aciculae are pale brownish; and the dorsal integument shows 9-10 transverse wrinkles per segment, whereas in E. problematica the ventral cirri hardly reach the tips of the neurochaetal lobes; the palps are as long as the antennae; the aciculae are black; and there are 15 transverse wrinkles per segment. A morphological redescription of E. problematica based on its type material and a revised key to identify species in the genus are also provided. A phylogenetic analysis based upon four genes (COI, 16S, 18S, 28S) confirms its position within Hesionini.


9.
Tesis - Maestría
Estructura de la comunidad octocoralina en arrecifes del sur de Quintana Roo, México / Ursula Andrea Olvera Moreno
Olvera Moreno, Ursula Andrea ; Ruíz Zárate, Miguel Ángel (director) ; Salazar Vallejo, Sergio I. (asesor) ; Lasker Howar (asesor) ;
Chetumal, Quintana Roo, México : El Colegio de la Frontera Sur , 2018
Clasificación: TE/593.5097267 / O5
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
ECO030008766 (Disponible)
Disponibles para prestamo: 1
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Índice | Resumen en: Español |
Resumen en español

Las gorgonias, grupo de cnidarios coloniales de gran importancia ecológica, pertenecen a la subclase Octocorallia y han sido consideradas como un grupo faunístico olvidado en las ciencias marinas por las dificultades en su identificación. En el Caribe mexicano, los pocos trabajos ecológicos sobre este grupo fueron realizados hace más de 20 años y se restringen a las zonas norte y centro de esta región. Xcalak se localiza en la porción más sureña del Caribe mexicano y es parte del límite geográfico entre México y Belice. Los arrecifes bordantes de esta zona se componen por estructuras calcáreas divididas por canales (pasos o “quebrados”) que permiten el flujo de agua entre la laguna arrecifal y el mar Caribe. Dicho acomodo estructural genera características oceanográficas particulares en cada una de las zonas arrecifales, mismas que moldean la fauna béntica al igual que la distribución y abundancia de las especies de gorgonias. Con el fin de evaluar la estructura comunitaria de este grupo, al igual que la fauna béntica asociada, se realizaron observaciones y colectas en tres zonas arrecifales en las inmediaciones del Parque Marino Arrecifes de Xcalak. Se eligieron tres localidades (Hobná, Doña Nica y Portillas) en los extremos y centro del Parque donde se tendieron transectos de banda de 1x10m2 para censar las especies de gorgonias encontradas en el arrecife posterior, arrecife frontal somero y en los canales (cinco transectos por cada zona arrecifal). El análisis béntico se realizó a partir de 10 fotocuadrantes hechos en cada uno de los transectos. Adicionalmente, se colectó por lo menos un ejemplar de cada especie para su corroboración en laboratorio. Todas las colonias fueron analizadas y comparadas con el material depositado en el Museo Nacional de Historia Natural del Instituto Smithsoniano en Washington.

Para evaluar el efecto de la zona arrecifal y la localidad en las comunidades de gorgonias, así como su relación con el bentos, se ejecutaron ANOVAS con la riqueza y diversidad (H’). Para probar las posibles diferencias por localidad y zona arrecifal, se corrieron dos PERMANOVAs (uno para la comunidad de gorgonias y el segundo para el bentos), los resultados obtenidos se representaron gráficamente mediante CAPs. Se identificaron 29 especies de gorgonias, siendo Gorgonia ventalina Linnaeus, 1758 y Eunicea mammosa Lamouroux, 1816 las únicas con distribución en las tres zonas arrecifales de todas las localidades. Se encontraron diferencias significativas en los análisis de riqueza y diversidad, al igual 2 que en ambos PERMANOVA. El análisis de gorgonáceos y la estructura béntica mostraron diferencias entre localidades, zonas arrecifales y la interacción de ambos factores. Las gorgonias no mostraron un patrón de distribución relacionada con ninguna localidad. No obstante, para las zonas arrecifales se encontró un patrón definido de especies dominantes. En el frente arrecifal Antillogorgia americana (Gmelin, 1791) fue la más importante, mientras que el arrecife posterior estuvo dominado por Briareum asbestinum (Pallas, 1766) y los pasos por G. ventalina. En cuanto al bentos, el arrecife frontal estuvo dominado por macroalgas, corales duros y gorgonias, el arrecife posterior por pastos marinos y los canales por gorgonias, macroalgas y esponjas.

La composición de gorgonias de Xcalak mostró similitudes con la estructura comunitaria reportada para otras regiones de la península de Yucatán; no obstante, se distingue de otras regiones por la abundancia de G. ventalina en los canales y la relativa baja riqueza relacionada con la profundidad y zonas arrecifales de muestreo. Las diferencias en la estructura de gorgonias pueden deberse a la distribución diferencial de las especies, a cambios en la diversidad reportada hace más de 20 años o a la errónea identificación de las especies. Por otra parte, la estructura del bentos describe la hidrodinámica de cada zona arrecifal y es semejante a lo encontrado en el centro y norte del Caribe mexicano: el frente arrecifal es el más dinámico al mantenerse constantemente impactado por las olas y la marea; los canales suelen recibir gran cantidad de energía al transportar el agua entre la laguna y el océano; el arrecife posterior es considerado un ambiente más tranquilo debido a que el oleaje rompe en la cresta arrecifal. Los cambios en la estructura de los arrecifes coralinos han impulsado el reciente interés por su conservación. Los gorgonáceos son una de las faunas más importantes en estos sistemas, por lo que su estudio provee información indispensable para su cuidado y conservación.

Índice

LISTA DE TABLAS
RESUMEN
PALABRAS CLAVE
INTRODUCCIÓN
CAPÍTULOS: Gorgonian community structure and associated sessile macrofauna in a Mexican Caribbean protected area
CONCLUSIONES
BIBLIOGRAFÍA
ANEXOS


10.
- Artículo con arbitraje
Redescription of Leocrates chinensis Kinberg, 1866 (Annelida, Hesionidae)
Wang, Zhi ; Qiu, Jian-Wen (coaut.) ; Salazar Vallejo, Sergio I. (coaut.) ;
Contenido en: Zoological Studies Vol. 57, no. 5 (February 2018), p. 1-11 ISSN: 1810-522X
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Resumen en: Inglés |
Resumen en inglés

Leocrates chinensis Kinberg, 1866 is the type species of Leocrates Kinberg, 1866 (Annelida, Hesionidae). Its original description, based upon a single specimen collected in Hong Kong waters, was brief; its illustrations were published almost 50 years afterwards, and the type specimen was dried out before it could be redescribed. The late Marian Pettibone redescribed the species in 1970 but her illustrations of the species were based on specimens from the Mediterranean Sea, the Virgin Islands, and Samoa, not Hong Kong. In order to define the morphological features, we herein redescribe this species based upon newly collected specimens from the type locality. This species is characterized by the following features: prostomium subrectangular with a posterior notch, lateral antennae slightly longer than palps, palps with palpophores about 2.5 times longer than palpostyles, anterior eyes twice larger than posterior ones, slightly emarginated, posterior ones circular, median antenna fixed slightly ahead of posterior eyes, nuchal organs C-shaped; pharynx with a prominent dorsal papilla, a mid-dorsal jaw and a mid-ventral jaw; first four chaetigers subbiramous, others biramous with neuroacicular lobes blunt, as long as wide, or longer than wide; notochaetae spinulose capillaries; most neurochaetae with blades bidentate, guards approaching subdistal tooth; a few neurochaetae with long, tapered hoods. A key to identify all species in the genus is also included.