132,546 research outputs found
[Conferência Regional Latina-Americana organizada pela Fundação João Pinheiro]
No full textImagem da Conferência Regional Latina-Americana organizada pela Fundação João Pinheiro entre 08 a 13 de agosto de 1992, realizada no Auditório Principal, com Akin L. Mobogunje, R. P. Misra, Bertha K. Becker e Ladislau Dowbor componentes da mesa
[Jo??o L??cio de Freitas, t??cnico da FJP]
No full textJo??o L??cio de Freitas, t??cnico da Funda????o Jo??o Pinheiro (FJP)
Ephydatia caatingae Nicacio & Pinheiro, 2015, sp. nov.
No full textEphydatia caatingae sp. nov. (Figures 6 and 7, Table 1) Material studied. Holotype: Poço Verde Pond, Orobó, Pernambuco, Brazil, 7 ° 44 ' 10.7 "S 35 ° 32 ' 35.8 "W, UFPEPOR 1733, coll. U. Pinheiro, 17.ix. 2013. Paratype: Poço Verde Pond, Orobó, Pernambuco, Brazil, 7 ° 44 ' 10.7 "S 35 ° 32 ' 35.8 "W, UFPEPOR 1736, coll. U. Pinheiro, 17.ix. 2013. Comparative material: Ipanema River, Santana do Ipanema, Alagoas, Brazil, 9 º 21 ' 52.8 ''S 37 º 15 ' 28.4 ''W, UFPEPOR 1402, coll. G. Nicacio, 15.xii 2012. Poço Verde Pond, Orobó, Pernambuco, Brazil, 7 ° 44 ' 10.7 "S 35 ° 32 ' 35.8 "W, UFPEPOR1403, 1404, coll. L. R. C. Lima, 29.ix. 2012; UFPEPOR 1737, 1740, 1742, 1744, coll. U. Pinheiro, 17.ix. 2013. Etymology. The epithet is related to the type locality, Caatinga Brazilian biome, where specimens were found. Diagnosis. Ephydatia species characterized by birotules as gemmuloscleres with strongly incised rotules and smooth or spined shaft, with secondary spines. Type locality. Brazil, Pernambuco, Orobó, Poço Verde Pond (7 ° 44 ' 10.7 "S 35 ° 32 ' 35.8 "W). Holotype UFPEPOR 1733. General morphology. Encrusting sponge with reticulated surface. Measuring 1cm in thickness and 12cm in diameter. Green colour (Fig. 6 a). Consistency of live sponge is fragile and brittle, paucispicular skeleton, spongin abundant. Spicules. Megascleres spined or smooth oxeas (267–302.2 – 332 / 10– 14.4 – 17 µm), slender and slightly curved (Fig. 7 a). Microscleres absent. Gemmuloscleres birotules (32–40 – 48 / 5- 7.1 - 8 / 15-21.3 – 25 µm), smooth or spined shaft, with secondary spines (spines ornamented by microspines). The rotules are strongly incised (Fig. 7 b). Gemmules scattered, hemispherical, averaging 275-351 - 387 µm in diameter. Gemmular theca tri-layered with well-developed pneumatic layer of irregular spongin chambers and gemmuloscleres are radially embedded in the outer and pneumatic layers (Fig. 7 c,d). Comparative material. General morphology. Encrusting sponge with 1cm thickness and averaging 20cm in diameter. The colour is green when the sponges are exposed to sunlight and beige in sciaphilous habitats (Fig. 6 b). Spicules are of the same morphology as described in the holotype. Megascleres (250–307.8 – 362 / 9–13.9 – 18 µm), Microscleres absent. Gemmuloscleres (32–43.8 – 55 / 5-7.5 - 10 / 15-22.5 – 26 µm). Gemmules averaging 262-343 - 450 µm in diameter. Distribution and ecological notes. The new species is so far recorded from Pernambuco and Alagoas states of Brasil. The region where this species was found is characterized by environments with low rainfall and a semi-arid climate. Specimens were collected on rocky substrate and tree trunks in shallow water. Gemmules were often abundant. Green specimens in symbiosis with algae were found living exposed to sunlight. Remarks. The cosmopolitan genus Ephydatia is widely distributed throughout the Northern Hemisphere, but it is also has scattered records from Southern Hemisphere (Manconi and Pronzato 2007). This supposed wide distribution might be due to the existence of a species-complex suggested for widespread species. From the Neotropical Region there is only one record so far, viz. Ephydatia facunda Weltner, 1895. This species has a supposed widespread distribution from the Caribbean to southern Brazil. Manconi & Pronzato (2005) recorded E. facunda from Cuba and expanded its distribution in South America, previously only known from Brazil. However, the specimens from Cuba have remarkable morphological divergences compared to the Brazilian specimens (De Rosa-Barbosa 1984, Volkmer-Ribeiro et al. 1988, Volkmer- Ribeiro & Tavares 1990, Pinheiro et al. 2004, Volkmer-Ribeiro & Machado 2007). Ephydatia facunda from Cuba is characterized by having minute gemmules and gemmuloscleres smaller than those of the Brazilian specimens (Tab. 1). The main morphological divergence among descriptions of these disjunct populations concerns the remarkable differences of gemmulosclere shape with thin smooth shaft. In fact, notable differences between specimens of E. facunda and their widespread distribution suggest the existence of a speciescomplex. The specimens studied here exhibit morphological differences from the other South American Ephydatia species that justify the proposal of a new species. Compared to Ephydatia facunda, the closest species geographically, it presents a different morphology of the birotule gemmuloscleres. Ephydatia facunda has shallowly incised rotules with the spines on the shaft being simple and sharp, compared to the strongly incised rotules and composite spines in Ephydatia caatingae sp. nov. Additionally, in gemmules, the gemmuloscleres are more densely distributed in Ephydatia facunda than in Ephydatia caatingae sp. nov. (Fig. 7 c,d). Despite the fact that fossil species, Ephydatia chileana Pisera & Sáez, 2003 shared incised rotules with Ephydatia caatingae sp. nov., its spines of the shaft are simple against the composite spines of the new species. Five species of Ephydatia are known from North America: E. fluviatilis (Linnaeus, 1758), E. millsii (Potts, 1887), E. mulleri (Lieberkühn, 1855), E. robusta (Potts, 1887), and E. subtilis Weltner, 1895. Among these species, only E. robusta has spines on the shaft of birotules, thus being the closest species to Ephydatia caatingae sp. nov.; however, the spines of the shaft are simple against the composite spines of the new species. Species/ Specimens Locality Megasclere Gemmulosclere (*)Values are in µm and expressed as shortest length–mean length–longer length/thinner thickness–mean thickness–widest thickness. where appropriate; (1) Weltner (1895); (2) Gee (1930); (3) De Rosa-Barbosa (1979); (4) Penney & Racek (1968); (5) Pinheiro et al (2004); (6) Manconi & Pronzato (2005); (7) Pisera & Saez (2003); (8) Present Work. Poirrier (1974) experimented with Ephydatia fluviatilis in different enviromental conditions and proposed that this species had a huge ecomorphic variation related to the prevailing habitat. At that time, he proposed E. robusta as synonym of Ephydatia fluviatilis and suggested this species was truly cosmopolitan, drawing attention to the true geographic variation which is usually masked by the high adaptive ecomorphic variation exhibited in its spicules. On the other hand, this recommendation is not being followed, because Poirrier (1982) and van Soest et al. (2015) have considered E. robusta as valid species. It is possible that some species may have an ecomorphic variation that makes it difficult to take a taxonomic decision. However, we can not generalize this feature for all freshwater sponge species that have alleged widespread distributions. Taxonomic works (revisions) and taxonomists of freshwater sponges are scarce, both of which are necessary to solve this problem. For example, Pinheiro (2007) verified that only three species (6 %) of freshwater sponges recorded from Brazil are not endemic to South America (Tubella pennsylvanica (Potts, 1882), Eunapius fragilis (Leidy, 1851) and Heteromeyenia stepanowii (Dybowski, 1884)), but all of these have few and simple spicules and have not been revised. This low number suggests that species identified as allegedly widespread might be directly related to the paucity of morphological distinctness of characters under study. There is still a difficulty in recognizing species complex and it is possible that certain species can lead to misinterpretation of alleged cosmopolitanism. New experimental works are necessary to find any real clear-cut distinction between ecomorphic variation and speciation in such sponges.Published as part of Nicacio, Gilberto & Pinheiro, Ulisses, 2015, Biodiversity of freshwater sponges (Porifera: Spongillina) from northeast Brazil: new species and notes on systematics, pp. 220-240 in Zootaxa 3981 (2) on pages 227-230, DOI: 10.11646/zootaxa.3981.2.4, http://zenodo.org/record/24208
Tosanoides aphrodite Pinheiro, C. Rocha
No full textTosanoides aphrodite Pinheiro, C. Rocha, & L. A. Rocha, 2018 Holotype: CIUFES 3444, 56.8 mm SL, male. Type locality: Saint Paul’s Rocks, Brazil; 00°56′ N, 29°22′ W, depth 120 meters. Illustrations: Pinheiro, C. Rocha, & L. A. Rocha, 2018, figs. 1–4. Counts: D: X, 15 or 16. A: III, 9. P: 14 or 15. C: 13 (7 + 6) branched. V: 27 (10+ 17). GR: 30 (8 + 22). LL: 32 to 35. Distribution: known only from the type locality, off Saint Paul’s Rocks, Brazil.Published as part of Anderson, William D., 2022, Additions and emendations to the annotated checklist of anthiadine fishes (Percoidei: Serranidae), pp. 567-578 in Zootaxa 5195 (6) on page 575, DOI: 10.11646/zootaxa.5195.6.5, http://zenodo.org/record/722395
Mayet (Françoise) et Tavares da Silva (Carlos). L 'atelier d'amphores de Pinheiro (Portugal).
No full textBrichard Catherine. Mayet (Françoise) et Tavares da Silva (Carlos). L 'atelier d'amphores de Pinheiro (Portugal).. In: Revue belge de philologie et d'histoire, tome 78, fasc. 1, 2000. Antiquite - Oudheid. pp. 267-268
Mayet (Françoise) et Tavares da Silva (Carlos). L 'atelier d'amphores de Pinheiro (Portugal).
No full textBrichard Catherine. Mayet (Françoise) et Tavares da Silva (Carlos). L 'atelier d'amphores de Pinheiro (Portugal).. In: Revue belge de philologie et d'histoire, tome 78, fasc. 1, 2000. Antiquite - Oudheid. pp. 267-268
Lissodendoryx (Anomodoryx) vulcanus Cavalcanti, Santos & Pinheiro 2014
No full textLissodendoryx (Anomodoryx) vulcanus Cavalcanti, Santos & Pinheiro, 2014 (Figure 3) Lissodendoryx (Anomodoryx) vulcanus Cavalcanti et al. (2014): p. 497. Examined material: UFPEPOR 3249, off Boa Viagem Beach (8° 9’ 9” S, 34° 45’ 8” W, Recife, Pernambuco, Brazil), 27 m depth, dredging, st. IV, coll. Recife Expedition (Jan/19/1967). Description: External morphology (Fig 3A): Fragmented specimen, largest fragment measuring 6 cm. Thin transparent peelable film on the ectosome. Smooth surface, fragile consistency, oscules were not observed. Color is beige when preserved (80% ethanol), color in life is unknown. Skeleton (Fig 3B): Ectosome consists of a palisade of tylotes forming a detachable film, with abundant spongin fibers. Choanosomal skeleton a dense, albeit loose reticulation of tylotes, with raphides strewn in confusion in between. Microscleres irregularly distributed. Spicules (Fig 3C–F). Tylotes (293– 448.4 –525 / 4– 5.6 –7 µm): thin, smooth, curved to sinuous, rounded tyles, with slight prominence, sometimes styloid or strongyloid (Fig 3C). Raphides (68– 111.9 –124 µm): elongated, thin, straight to slightly curved, smooth, needle-like tips (Fig 3D). Arcuate isochelae (14– 18.5 –27 µm): slightly curved axis, short and curved alae (Fig 3E). Sigmas (24– 36.7 –46 µm): thin, smooth, curved, “C”-shaped (Fig 3F). Ecology: The specimen was collected by dredging off Boa Viagem Beach (Recife, Pernambuco State, Brazil), at 27 m depth, on sandy bottom. The specimen was associated with Tedania (Tedania) ignis (Duchassaing & Michelotti, 1864). Geographic distribution: Brazilian endemic registered from Rio Grande do Norte State (Cavalcanti et al. 2014), and now from Pernambuco State (present study). Remarks: The analyzed specimen was assigned as a member of the subgenus L. (Anomodoryx) because it has only tylotes as megasclere. From this, it was identified as L. (Anomodoryx) vulcanus due to its skeletal architecture and spicular set being similar to that exhibited by the holotype (Cavalcanti et al. 2014). Because the present materials comprise only fragments, it was not possible to observe the morphological characteristics described for the holotype from Rio Grande do Norte State. With this record, we expand the bathymetric occurrence to shallower waters (27 m depth), previously only known from 108 m depth (Cavalcanti et al. 2014).Published as part of Barros, Thales, Cavalcanti, Thaynã, Hajdu, Eduardo & Pinheiro, Ulisses, 2023, Lissodendoryx Topsent, 1892 (Poecilosclerida: Coelosphaeridae) from Brazil: a new species and transfer of Strongylacidon oxychaetum Menegola, Santos, Moraes & Muricy, 2012 to the genus Lissodendoryx, pp. 401-412 in Zootaxa 5336 (3) on pages 405-406, DOI: 10.11646/zootaxa.5336.3.6, http://zenodo.org/record/828171
Anheteromeyenia diamantina Calheira & Pinheiro 2018, sp. nov.
No full textAnheteromeyenia diamantina sp. nov. Type locality. Poço Halley, Lençóis, Chapada Diamantina, Bahia State, Brazil. Material Studied. Holotype. UFPEPOR 2061, Poço Halley, Lençóis, Bahia, Brazil, (12°33’47.9”S 41°23’46.3”W), coll. Calheira, L. 31.xii.2015. Paratypes. UFPEPOR 2062, coll. L. Calheira, 31.xii.2015; UFPEPOR 2063, 2064, 2065, coll. F. Andrade, 31.xii.2015 (collected together with the holotype). Diagnosis. One category of megascleres (exclusively smooth oxeas); microscleres absent; acanthoxea and acanthostrongyle gemmuloscleres radially embedded in the gemmular theca, emerging more or less from the inner layer according to their different levels of insertion. Description of holotype. UFPEPOR 2061 encrusting, less than 10 mm thick. Hispid surface. Oscules inconspicuous. Colour in life green turning creamy white after preservation in ethanol 70%. Consistency soft, compressible and fragile. Spicules. Megascleres oxeas (267–335.1–406 / 10–13.1–16 µm), microscleres absent, gemmuloscleres acanthoxeas (161–172.3–180 / 6–7–10 µm) and acanthostrongyles (100–146–177 / 6–7–10 µm). Gemmules scattered throughout the sponge (567–689.9–867 µm in diameter) (Table 1). Description. Sponge encrusting to massive. Surface hispid with inconspicuous oscules. Colour green in vivo, creamy white in ethanol 70% (Fig. 2). Consistency soft, compressible and fragile. Spicules. Megascleres oxeas (232–320.3–406 / 8–11.5–16 µm), smooth, straight to slightly curved, gradually pointed (Fig. 3A); microscleres absent; gemmuloscleres acanthoxeas (105–152.2–193 / 5–6.9 –10 µm) (Fig. 3B,D) and acanthostrongyles (77– 123.3–177 / 5–6.6–10 µm), straight shaft, entirely spined with a variable number of spines, usually more abundant and larger at the tips (Fig. 3C,E). Spines straight (predominantly) or curved (rarely), curved ones occur mainly towards the center of the spicule; straight ones in the center of the spicule. Gemmules (533–700.3–867 µm in diameter) abundant, spherical, scattered throughout the sponge body (Fig. 4A, B). Foramen simple, short tube without colar, contained inside a conical concavity of the pneumatic layer (Fig. 4C). Gemmular theca tri-layered: thin inner layer, thick pneumatic layer and inconspicuous outer layer (Fig. 4D). Gemmuloscleres radially embedded in the gemmular theca, emerging from the inner layer according to their different levels of insertion (Fig. 4B). Ecology. Specimens were collected on rocky substrate in shallow and turbid waters, with depth ranging from 10 cm to 1 m. Gemmules were often abundant. Etymology. The specific epithet refers to the type locality, at Chapada Diamantina, northeast Brazil.Published as part of Calheira, Ludimila & Pinheiro, Ulisses, 2018, A new species of Anheteromeyenia (Porifera, Demospongiae) with an emended diagnosis of the genus, pp. 129-136 in Zootaxa 4378 (1) on pages 131-133, DOI: 10.11646/zootaxa.4378.1.9, http://zenodo.org/record/116813
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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