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Fig. 5. Baryancistrus chrysolomus, INPA 33845 in Two new ornamental loricariid catfishes of Baryancistrus from rio Xingu drainage (Siluriformes: Hypostominae)
No full textFig. 5. Baryancistrus chrysolomus, INPA 33845, holotype, 219.0 mm SL in lateral, dorsal, and ventral views (photos RRO). Brazil, Pará, Altamira, rio Xingu at Furo do Ramiro.Published as part of Py-Daniel, Lúcia Rapp, Zuanon, Jansen & Oliveira, Renildo Ribeiro de, 2011, Two new ornamental loricariid catfishes of Baryancistrus from rio Xingu drainage (Siluriformes: Hypostominae), pp. 241-252 in Neotropical Ichthyology 9 (2) on page 248, DOI: 10.1590/S1679-62252011000200001, http://zenodo.org/record/464748
Fig. 5. Ancistrus marcapatae, MUSM 57853, 54,6 in A new species of Ancistrus Kner, 1854 (Siluriformes: Loricariidae) from rio Madeira basin, Amazonas State, Brazil
No full textFig. 5. Ancistrus marcapatae, MUSM 57853, 54,6 mm SL, male; Peru, Manu, rio Madre de Dios drainage, rio Adanrayo.Published as part of Bifi, Alessandro Gasparetto, Oliveira, Renildo Ribeiro de & Py-Daniel, Lúcia Rapp, 2019, Neotropical Ichthyology 17 (2), DOI: 10.1590/1982-0224-20180135, http://zenodo.org/record/366128
Caracterização morfológica dos representantes do gênero Ituglanis (Siluriformes, Trichomycteridae) da bacia Amazônica brasileira
Full text linkThis project aimed to contribute for a better taxonomic understanding of the species of the
genus Ituglanis, Trichomycteridae (Siluriformes) occurring in the Brazilian Amazon. The
genus occurs in all the large drainages in South America. However, only two species were
registered to occur in Central Amazon, Ituglanis amazonicus and I. parkoi, both described
based in only one specimen. In this thesis, these species are redescribed based on a larger
number of specimens of I. amazonicus, providing information on morphological variation,
and on the holotype and X-ray images for I. parkoi. As the major results, four new
morphotypes were determined for the Brazilian Amazon herein proposed as new species and
the geographic distribution of the genus was widened for several drainages in the Amazon .
Ituglanis sp. n. ‘tapajos’ presented a color pattern of difuse blotches; autopalatine with a slight
concavity on its mesial margin; pelvic-fin rays not covering anus and urogenital opening; 43-
45 vertebrae and frontal fontanel absent. Ituglanis sp. n. ‘dardanelos’ presented 4-5 pairs of
pleural ribs; 38-40 vertebrae; color pattern with dense cromatophore irradiation sometimes
forming longitudinal lines on the dorsum and frontal fontanel absent. Ituglanis sp. n. ‘xingu’
is characterized by a color pattern of big and coalescing blotches densely covering the
dorsum, blotches also on ventral surface and supraoccipital fontanel rectangular. Ituglanis sp.
n. ‘morena’ is characterized by presenting three pores on lateral line (II1, II2 and II3); many
vertebrae (51) and anus and urogenital papillae located closer to anal-fin base than to tip of
pelvic–fin rays.Este trabalho tem como objetivo contribuir para um melhor conhecimento taxonômico das
espécies do gênero Ituglanis, (Siluriformes, Trichomycteridae) que ocorrem na bacia
Amazônica Brasileira. O gênero ocorre em todas as grandes drenagens da América do Sul.
Atualmente são conhecidas apenas duas espécies válidas para Amazônia central, Ituglanis
amazonicus e Ituglanis parkoi, ambas descritas com base em um único exemplar. Neste
trabalho, estas espécies são redescritas usando-se um maior número de exemplares da espécie
I. amazonicus, ampliando, assim, sua variação morfológica e, no caso de I. parkoi, através de
material tipo e imagens de raio-x. Como principais resultados, foram determinados novos
morfotipos para a região amazônica descritos aqui como quatro novas espécies e a
distribuição geográfica do gênero foi ampliada para varias drenagens na bacia Amazônica.
Ituglanis sp. n. “tapajós” apresentou um padrão de coloração com máculas difusas;
autopalatino com uma leve concavidade em sua margem mesial; raios da nadadeira pélvica
não cobrindo o ânus e a papila urogenital; 43-45 vértebras e ausência de fontanela frontal.
Ituglanis sp. n. “dardanelos” possui 4-5 pares de costelas pleurais, 38-40 vértebras , padrão de
coloração mosqueado com máculas coalescente no dorso formando linhas longitudinais em
alguns exemplares e ausência de fontanela frontal. Ituglanis sp. n. “xingu” é caracterizado por
possuir um padrão de coloração com máculas grandes e coalescentes cobrindo densamente a
região dorsal, máculas também encontradas na região ventral; fontanela supraoccipital
retangular. Ituglanis sp. n. “morena” é caracterizado por apresentar três poros na linha lateral
II1, II2 e II3; elevado número de vértebras, 51, e ânus e papila urogenital localizados mais
próximo da base da nadadeira anal do que a extremidade dos raios da nadadeira pélvica
Ancistrus miracollis Bifi & Oliveira & Py-Daniel 2019, new species
No full textAncistrus miracollis, new species urn:lsid:zoobank.org:act: 4D62A4E1-4BAF-4A2E-9112- 3941327D3618 Fig. 1-2, Tab. 1 Holotype. INPA 57624, male, 66.7 mm SL; Brazil: Amazonas State: Apuí, comunidade Terra Preta, igarapé do Mureru, tributary of rio Sucunduri, rio Madeira basin, 7°45’45”S 58°49’00”W, 29 Jun 2006, L. H. Rapp Py- Daniel, C. E. Marinelli & C. S. da Silva. Paratypes. All from Brazil: Amazonas State: Apuí: rio Madeira basin: INPA 26144, 1, 59.0 mm SL, igarapé located just off the trilha do Inferno, tributary of rio Sucunduri, 8°34’41”S 59°9’13”W, 23 Jun 2006, O. S. Pereira. INPA 26433, 27 (25 alc., 21.7-64.4 mm SL and 2 c&s 48.9-54.0 mm SL); MCP 54133, 2, 45.0- 48.7 mm SL; MPEG 38161, 2, 51.1-56.2 mm SL; MZUSP 124264, 2, 47.5-59.5 mm SL, same data of holotype. Diagnosis. Ancistrus miracollis is diagnosed from its congeners by having thin light vertical bands on the trunk, sometimes incomplete (vs. plain, with black or white spots, or unpigmented body). Furthermore, the new species can be distinguished from other Ancistrus species described from the rio Madeira basin by pectoral-fin length surpassing the pelvic-fin origin (vs. not reaching or just reaching the pelvic-fin origin in A. marcapatae, A. megalostomus and A. montanus); larger cleithral width 33.5-36.9% in SL (vs. 27.7-33.0% in A. montanus); smaller dentary width 45.3-54.4% in interorbital distance (vs. 64.6-86.6% in A. marcapatae and 64.9-91.4% in A. melagostomus); and by possession of an adipose-fin (vs. adipose-fin absent in A. verecundus). Description. Morphometric data and counts in Tab. 1. Head and trunk moderately depressed. Dorsal profile of body convexly raising from tip of snout to dorsal-fin origin, then straight or slightly convex to adipose fin, and concave from that point to caudal fin. Ventral profile of body straight, slightly convex on caudal peduncle. Caudal peduncle compressed; slightly flattened ventrally. Snout large and rounded in dorsal view, with large naked margin bordered by dermal platelets on lateral portion; extension of naked area on snout large, representing ¾ of snout length. Adult males with small- to middle size tentacles (sometimes branched) along lateral border of snout and longitudinally aligned along mesethmoid, bifurcating caudally to nares; tentacles small and less numerous in females, limited to one series on lateral border of snout. Evertible cheek plates supporting (17-33) hypertrophied odontodes (cheek spines). Head covered by dermal bones; dorsum covered by dermal plates, except at dorsal-fin base. Eye mid-sized, 15.8-19.8% of HL, dorsal orbit not raised; dorsolaterally positioned. Interorbital region slightly concave. Exposed portion of opercle roughly triangular; supra-opercular region with few platelets near compound pterotic. Oral disk circular covered with small papillae; lower lip wide with papillae reducing in size toward its margin; maxillary barbel short, attached to lip by membrane and with reduced free tip. Premaxillary and dentary tooth rows short; teeth short, thin, numerous, bifid and curved inward. Cusps spatulated and asymmetrical, with mesial cusp larger and wider than lateral cusp. Only one small buccal papilla positioned between premaxillae. Five series of lateral plates, three lateral series on the narrowest portion of caudal peduncle. Mid-dorsal and midventral series not surpassing adipose fin. Median series supporting lateral line. Short odontodes on fin rays and body plates. Ventral surface devoid of plates from snout tip to anal-fin insertion. Base of first anal-fin pterygiophore exposed, forming preanal platelet-like element, sometimes covered by skin but supporting small odontodes. Dorsal-fin origin situated slightly anterior to vertical through pelvic-fin origin; dorsal fin usually reaching or surpassing preadipose plate when adpressed; dorsalfin spine flexible, shorter than head length. Adipose-fin spine short, slightly curved downward. Pectoral-fin spine inflexible and slightly curved inward, with hypertrophied odontodes and tentacles on its distal portion; pectoral-fin surpassing adpressed pelvic-fin origin. Pelvic fin flexible and curved inward, depressed pelvic-fin spine surpassing origin of anal fin. Anal fin short. Caudal-fin margin obliquely truncate with ventral unbranched ray longer than dorsal one. Fin-ray formula: dorsal II,7; pectoral I,6; pelvic i,5; anal i,3-4; caudal i,14,i. Total vertebrae: 27 (two specimens). Color in alcohol. Body background color dark gray or brown. Dorsal part of head with rounded light spots, on predorsal and dorsum region in some specimens; light vertical bars on trunk, variably incomplete, usually more conspicuous on caudal peduncle region. Barred pattern showing some variation (Fig. 2). Ventral surface of head and abdomen yellowish to light brown, brown on ventral surface of caudal peduncle. All fins with alternating dark and light spots on rays, organized in transverse bands in some specimens. Sexual dimorphism. Ten males and 11 females measured; largest male and female with 66.7 mm and 67.4 mm SL, respectively. Mature males have small- to middle-sized tentacles in the dorsal region and border of snout. Females can have fewer and shorter tentacles than males limited to one series on lateral border of snout, usually two to four on each side of snout. Geographical distribution. Ancistrus miracollis is only known from the Mosaico of Conservation Units of Apuí on southern Amazon State, near the border with Mato Grosso State, Brazil. The new species was found in small streams flowing to the rio Sucunduri, affluent of lower rio Madeira (Fig. 3). Etymology. From the latim mirus = wonderful, surprising and collis = hill, mountain, in allusion to the beauty of the species with unique pattern color of Ancistrus and its sampling site in the highlands of the Parque Estadual do Sucunduri, more specifically in the Sucunduri Dome, an allusion to its elevation that can reach up to 350 m, very peculiar for this area. An adjective. Conservation status. The type locality of A. miracollis (igarapé do Mureru) is not an easily accessible place and the sampling was made possible through governmental funds from the state of Amazonas (Secretaria de Desenvolvimento Sustentável do Amazonas - SDS). The Mosaic of Apuí comprises nine conservation units, seven considered of sustainable usage, and two State Parks under full protection. Thus, we suggest that A. miracollis be categorized as LC (Least Concern) under the International Union for Conservation of Nature (IUCN) categories and criteria (IUCN Standards and Petitions Subcommittee, 2017) of extinction risk. Comments on taxonomic status of Ancistrus marcapate: Three species have been described from ríos Beni and Madre de Dios basins: A. bolivianus, A. heterorhynchus and A. marcapatae (Fig. 4). The examination of the type material revealed no differences between these three species, but that they share some uncommon features such as: teeth with elongated principal cusp sharpened and at least three times larger than lateral cusp; pectoral-fin not surpassing the pelvic-fin origin; and anterior adiposefin keel formed by four to six plates. Furthermore, these species have a slightly concave profile between adipose and caudal fins; dentary length (24.9-29.5% in HL), and fins with dark spots forming transverse bands. These characters combinations distinguish them from the majority of Ancistrus species. Thus, based on these observations we recognize A. bolivianus and A. heterorhynchus as junior synonyms of A. marcapatae (Fig. 5).Published as part of Bifi, Alessandro Gasparetto, Oliveira, Renildo Ribeiro de & Py-Daniel, Lúcia Rapp, 2019, A new species of Ancistrus Kner, 1854 (Siluriformes: Loricariidae) from rio Madeira basin, Amazonas State, Brazil in Neotropical Ichthyology 17 (2), DOI: 10.1590/1982-0224-20180135, http://zenodo.org/record/366128
A New Species of Chaetostoma (Siluriformes: Loricariidae) Expands the Distribution of Rubbernose Plecos Eastward into the Lower Amazon Basin of Brazil
No full textA new species of the rubbernose pleco genus Chaetostoma is described from the Maicuru and Seiko Rivers, a northern tributary of the lower Amazon River and a tributary of the lower Xingu River, respectively, both in Para´ State, Brazil. The new species is diagnosed from all congeners, except members of the Chaetostoma anale species group, by having an enlarged second unbranched anal-fin ray with posterior paired dermal flaps. Additionally, the new species is distinguished from its only other currently recognized congeners from rivers draining the Guiana Shield (C. jegui and C. vasquezi) by having a smaller opercle and a supraoccipital excrescence undeveloped, comprising a simple skin area present in juveniles and absent in adults. A revised multi-locus phylogeny for the species of Chaetostoma is presented, and the Chaetostoma anale species group is discussed and rearranged
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Comparison of the relative efficiency of two fishing gears in sandy beaches in lower Purus river, Amazonas, Brazil
Full text linkDespite representing one of the seven most important aquatic habitats in the Amazon, little has been done concerning fish inventories on sandy beaches, especially related to the fishing gear used in these environments. This study aims to compare the relative efficiency of two fishing gears, seine and gill-net, used actively (trawling), on three sandy beaches on the lower reaches of Rio Purus. Seining resulted in a larger number of species and specimens, whereas for total biomass, gill-nets showed larger values, mainly represented by Siluriformes. Low similarity between samples (38%) was due to different catches of each gear: 41 species collected only with seine and 32 only with gill-net. The present study strengthens the importance of using different fishing gears in experimental fisheries as a way to overcome the inherent selectivity of each gear, and thus improving the efficacy of sampling in poorly-known environments.Apesar das praias serem consideradas um dos sete mais importantes habitats aquáticos da Amazônia, poucos trabalhos foram realizados quanto ao levantamento de sua ictiofauna, principalmente quando utilizados diferentes apetrechos de coleta. Este trabalho teve como objetivo comparar a eficiência relativa de dois apetrechos, rede de cerco e malhadeira, ambos utilizados de forma ativa (arrasto), em três praias localizadas no baixo rio Purus. A rede de cerco apresentou maior número de espécies e indivíduos capturados, no entanto, a malhadeira apresentou maiores valores de biomassa total, representada principalmente por Siluriformes. A baixa similaridade da fauna de peixes capturada (38%) foi devido à exclusividade de espécies coletadas com cada apetrecho, 41 com rede de cerco e 32 com malhadeira. O presente trabalho mostra a importância de se utilizar diferentes apetrechos de coleta como forma de diminuir a seletividade inerente de cada um desses aparelhos, melhorando a efetividade de amostragens em ambientes pouco estudados
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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