17,520 research outputs found
Dissipative shock waves in all-normal-dispersion mode-locked fiber lasers
No full text4 pags.; 4 figs.; OCIS codes: (140.4050) Mode-locked lasers; (140.3510) Lasers, fiber.We propose an interpretation of the pronounced >M> spectral shape that is a recurrent feature in all-normal-dispersion mode-locked fiber laser dynamics. Our interpretation involves shock wave formation regularized by dissipation, modeled by a modified Burgers equation. The large fringes appearing at the edges of the spectrum result from discontinuities in the spectral phase. © 2014 Optical Society of America.The work of J. M. Soto-Crespo is supported by the MINECO under contracts FIS2009-09895 and TEC2012-37958-C02-02.Peer Reviewe
Hypotrachyna cleefii Divakar, A. Crespo, Sipman, Elix, comb. nov.
No full text<i>Hypotrachyna cleefii</i> (Sipman) Divakar, A. Crespo, Sipman, Elix & Lumbsch, <i>comb. nov.</i> MycoBank No.: <p>MB 803583</p> <p> <i>Parmelina cleefii</i> Sipman (1980: 352); <i>Parmelinopsis cleefii</i> (Sipman) V. Marcano & Sipman in Marcano <i>et al</i>. (1996: 214).</p> <p> <i>Hypotrachyna ectypa</i> (Brusse) Divakar, A. Crespo, Sipman, Elix & Lumbsch, <i>comb. nov.</i> MycoBank No.: MB 803584</p> <p> <i>Parmelia ectypa</i> Brusse (1991: 164); <i>Parmelinopsis ectypa</i> (Brusse) DePriest & Hale (1998: 203).</p>Published as part of <i>Divakar, Pradeep K., Crespo, Ana, Núñez-Zapata, Jano, Flakus, Adam, Sipman, Harrie J. M., Elix, John A. & Lumbsch, H. Thorsten, 2013, A molecular perspective on generic concepts in the Hypotrachyna clade (Parmeliaceae, Ascomycota), pp. 21-38 in Phytotaxa 132 (1)</i> on page 33, DOI: 10.11646/phytotaxa.132.1.2, <a href="http://zenodo.org/record/5086040">http://zenodo.org/record/5086040</a>
Xochicalco: Morelos
No full textLa información de esta miniguía se basa en los trabajos realizados por González Crespo, Norberto et al. Xochicalco, Guía INAH-Salvat, 1994. México; Garza Tarazona, Silvia y González Crespo, Norberto, La Acrópolis de Xochicalco, Gobierno del Estado de Morelos, 1994. MéxicoXochicalco significa en náhuatl "lugar de la casa de las flores". El núcleo urbano se desarrolla entre los años 700 a 900 d. C. fechas en que Teotihuacan había dejado de ser la metrópoli política de Mesoamérica, produciéndose un vacío de poder. Esta ciudad fortificada se encuentra sobre varias colinas que se elevan unos 200 m por encima del valle de Zacatepec, y así mantenía un complejo control de la región que los abastecía de toda clase de alimentos, mano de obra, materias primas y de construcción. Alrededor del año 700 d.C. se inician grandes construcciones, calzadas, murallas, terrazas, bastiones, conjuntos habitacionales, templos y caminos que la comunicaban con otros pueblos. Todo ello suponía un plan urbano preconcebido.</p
Litoblatta lutea Valverde & Crespo 2021, sp. nov.
No full textLitoblatta lutea sp. nov. (Figs. 1–8, 68) Holotype. Argentina, Province of Chaco: ♁, Castelli J.J. (lat 25.9463S, long 60.6204W), 30/XII/2002, Minoli S. coll. (MACN) MACN-En 34648 (= L. brasiliensis in Crespo & Valverde 2008; Crespo et al. 2010). Paratypes. Argentina. Province of Catamarca: ♁, La Banderita, XI/1951, Kormiley N. coll. (MACN) (= L. brasiliensis in Crespo et al. 2010). Province of Córdoba: ♁, locality missing, 20/XI/1948, López P. coll. (IFML). Province of Corrientes: ♁, Paso Amores, date and coll. missing (MLP). Province of Jujuy: ♁, locality missing, 29/ I/1958, Torres & Ferreira colls. (MLP); ♁, Calilegua (lat 23.7735S, long 64.7710W), I/1949, Willink A. & Monrós colls. (IFML) TBLA001. ♁, Calilegua, XII/1948, Poore B. coll. (IFML); ♁, PN Calilegua, Camping Aguas Negras, 20/ II /2013, Rubio G.D., Iuri H., Ojanguren A., Porta A. & Adilardi R. colls. (FCEN). Province of Salta: ♁, Campo Durán, 16-21/ III /1984, WiIllink A., Claps & Navarro colls. (IFML); ♁, Río Piedras, 15/ III /1938, Birabén M. coll. (MLP). Province of Santiago del Estero: ♁, Matará, 12/XII/1939, Birabén M. coll. (MLP); ♁, Río Salado, Wagner coll. (MLP). Province of Tucumán: ♁, Rumi Punco, 20/ III /1939, Birabén M. & Scott colls. (MLP), ♁, Tucumán (km 1333 between Tapia and Vipos, 700 m. a.s.l.), 4/ III /1965, Weyrauch W. coll. (IFML). Diagnosis. Supra anal apical margin sinuous (Fig. 1). Right paraproct presents a group of converging spines, a feature that allows specific identification (Figs.1–3). R1P ends distally as a quadrangular area bigger than the inner convex scale zone included (Figs. 7–8, 68). Male. Measurements in mm: N= 15. PL: 3.2‾4.42 (4.30); TeL: 11.98‾18.26 (13.10); TL: 15.42‾21.45 (16.00); IO: 0.50‾0.90 (0.60); IOc: 0.40‾0.70 (0.60); IA: 0.50‾1.10 (0.90). Supra anal plate wider than longer. Apical margin sinuous (Fig. 1). Cerci long and hairy (Fig. 2). Left paraproct hook shaped, right paraproct with a group of spines convergent on the internal inferior apex (Fig. 3). Asymmetrical subgenital plate with styli. Left stylus cylindrical and pilous. Right stylus shorter and stouter, conical with its surface covered by small spines (Fig. 4). The margin between the styli is almost straight. Genital sclerites: L3 hook shape with apical incision, L4U present; L2 strait broader basally with a curved via distally, whose width decreases apically. R with the following recognizable sclerites: R3; the cleft, R1S + R2; R4 and R1P (Figs. 5–7). R4 has a tobacco pipe shape and articulates with R2. R1P articulates cranially with R1S and ends distally as a quadrangular area which contains a convex scale zone sz (Fig. 8). Female. Unknown. Etymology. From Latin adjective (masculine), luteus -a (feminine), -um (neuter), yellowish. Distribution. Argentina-Provinces of Catamarca, Chaco, Córdoba, Corrientes, Jujuy, Salta, Santiago del Estero and Tucumán.Published as part of Valverde, Alejandra Del Carmen & Crespo, Francisco A., 2021, Four new species of Litoblatta from Argentina with a key to species based on males (Blattaria: Ectobiidae: Blattellinae), pp. 553-568 in Zootaxa 4941 (4) on page 555, DOI: 10.11646/zootaxa.4941.4.5, http://zenodo.org/record/459568
Parapelecopsis conimbricensis Bosmans & Crespo 2010, new species
No full text<i>Parapelecopsis conimbricensis</i> Bosmans & Crespo new species <p>(Figs 80–86)</p> <p> <b>Type material:</b> Holotype male, paratype male and paratype female from Portugal, Coimbra, Paúl de Arzila NR, meadow with few <i>Populus sp.</i>, about 100m from a small river, 23.X.2006, L. Crespo leg.; deposited in KBIN.</p> <p> <b>Etymology:</b> The name is an adjective and is Latin for a natural from Coimbra, the city where <i>P. conimbricensis</i> was first found.</p> <p> <b>Diagnosis:</b> The new species is closely related to <i>Parapelecopsis nemoraloides</i> (O.P.-Cambridge, 1884) and <i>P. nemoralis</i> (Blackwall). Males differ by the cephalic lobe being longer than wide, the wider sulcus, the relatively shorter dorsal and ventral apophyses of the palpal tibia and the wider terminal part of the embolus; females differ by the more anterior position of the insemination ducts.</p> <p> <b>Remarks:</b> The genus <i>Parapelecopsis</i> was created by Wunderlich in 1992 and, according to Platnick (2009), comprises three species: <i>Parapelecopsis nemoralis</i> (Blackwall, 1841) (type species), <i>P. nemoralioides</i> (O.P.-Cambridge, 1884), and <i>P. mediocris</i> (Kulczyn'ski, 1899). The first two are widely distributed in the Palearctic region and the third one is only known from Madeira. According to Wunderlich (1985), <i>Pelecopsis nemoralis</i> and <i>P. nemoralioides</i> have identical bulbs and variable height of the prosoma in both species; they can only be differentiated by the shape of the palpal tibia. He further suspects <i>P. mediocris</i> to be a junior synonym of <i>P. nemoralioides</i>. Figures of the prosoma of <i>P. nemoralis</i> and <i>P. nemoralioides</i> have been published by Simon (1884, figs 529–535), Tullgren (1954, figs 80e–f), Wiehle (1960, figs 61–71), Locket <i>et al.</i> (1974, figs 52A, C, F), Roberts (1987, figs 23i, 25a) and Heimer & Nentwig (1991, fig. 621). All show a large, rounded cephalic tubercle and a relatively small sulcus, clearly different from the material now discovered in Portugal. There are also differences in the male palp and the female epigynum. The creation of a new species is therefore clearly justified.</p> <p> Another species is here transferred to the genus <i>Parapelecopsis</i>: <i>Parapelecopsis lunaris</i> (Bosmans & Abrous 1992) new combination, from the north of Algeria. The species has all the characters of the genus: spineless tibiae, a cephalic lobe carrying the PM, one trichobothrium on the male palpal tibia, a long tegulum, a short spiral embolus and an anterior position of the spermathecae.</p> <p> <b>Description:</b> Male: Measurements: Total length 1.7–1.8; prosoma 0.70–0.83 long, 0.56–0.60 wide. Colour: Prosoma brown with darkened striae, thoracic part somewhat paler; legs yellow brown; abdomen greyish, in males with dark brown, pitted scutum, Prosoma (Figs 80–81): With small, flattened tubercle carrying the PM, longer than wide, with strong concavity between the AM and the PM and with very large sulcus behind the PL. Eyes: a = b = 1, c = 0.75, d = 3. Chelicerae: Fang groove with three promarginal and three smaller retromarginal teeth; stridulating file with 8 inconspicuous ridges. Sternum: With few punctures, smooth in the middle getting rugose towards the margins. Legs: All tibiae spineless. Tb Mt I = 0.43; Tb Mt IV absent. Palp (Figs 82–84): Tibia with large, triangular dorsal and retrolateral apophyses; tegulum ventrally strongly produced with large protegular process; suprategular apophysis strongly developed, U-shaped; embolic division with elongated tailpiece, embolus wider than tailpiece, compact, spirally coiled describing one circle, terminally pointed.</p> <p> <b>Female:</b> Measurements: Total length 1.8; prosoma 0.72 long, 0.62 wide. Colour as in the male, with four impressed reddish brown dots in the abdomen. Prosoma without concavity in lateral view. Eyes: a = 0.5, b = 0.75, c = 0.6, d = 0.75. Epigynum (Fig. 85): With rectangular plate with curved lateral margins.</p> <p>Vulva (Fig. 86): Spermathecae rounded, separated by 1.5 their diameter; insemination ducts wide, nearly touching in the middle, anteriorly trespassing the base of the spermathecae.</p> <p> <b>Additional material examined:</b> PORTUGAL. Coimbra: Coimbra, botanical garden, 1 male, spring 2004, Catarina Prado e Castro leg. (CRB).</p> <p> <b>Distribution:</b> Only known from the Coimbra distict in Portugal.</p> <p> <b>Habitat type:</b> Collected near a river and a spring.</p> <p> <b>Phenology:</b> Found in autumn and spring.</p>Published as part of <i>Bosmans, Robert, Cardoso, Pedro & Crespo, Luis Carlos, 2010, A review of the linyphiid spiders of Portugal, with the description of six new species (Araneae: Linyphiidae) 2473, pp. 1-67 in Zootaxa 2473 (1)</i> on pages 41-43, DOI: 10.11646/zootaxa.2473.1.1, <a href="http://zenodo.org/record/10094179">http://zenodo.org/record/10094179</a>
Supplementary material 52 from: Cardoso P, Crespo L, Silva I, Borges P, Boieiro M (2017) Species conservation profiles of endemic spiders (Araneae) from Madeira and Selvagens archipelagos, Portugal. Biodiversity Data Journal 5: e20810. https://doi.org/10.3897/BDJ.5.e20810
No full textDistribution of Typhochrestus madeirensis Crespo, 201
Eugenio Segry o El Traviato de Miguel Cané (p.): crónica de una actuación alegre
No full textCrespo, Natalia. Eugenio Segry o El Traviato de Miguel Cané (p.): crónica de una
actuación alegre”. Estudios Revista de Investigaciones Literarias y Culturales.
Universidad Simón Bolívar. ISSN: 0798-958
Ascocotyle patagoniensis Hernandez-Orts, Montero, Crespo, Garcia, Raga & Aznar 2012
No full textAscocotyle patagoniensis Hernández-Orts, Montero, Crespo, García, Raga & Aznar, 2012 Host: Otaria flavescens (Shaw) Site in host: intestine Locality: northern Patagonia (40 º 43 '– 43 º 20 'S, 63 º04'– 65 º07'W) Specimens in collection s: holotype BMNH (2012.2.13.1, 2012.2.13.2– 6)H,P; USNPC (105290)P; MNCN (4.02 / 52 – 4.02 / 57)P; MZU (EF 2 11592–11605)V References: Hernández-Orts et al. (2012 a; 2013 b)Published as part of Hernández-Orts, Jesús S., Viola, M. Natalia Paso, García, Néstor A., Crespo, Enrique A., González, Raúl, García-Varela, Martín & Kuchta, Roman, 2015, A checklist of the helminth parasites of marine mammals from Argentina, pp. 301-334 in Zootaxa 3936 (3) on page 326, DOI: 10.11646/zootaxa.3936.3.1, http://zenodo.org/record/23669
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