17 research outputs found
Fig. 9 in A new Centromochlus Kner, 1858 (Siluriformes: Auchenipteridae: Centromochlinae) from the transition between Amazon floodplain and Guiana shield, Brazil
No full textFig. 9. Centromochlus orca, new species, just after capture. Photo by H. Lazzarotto.Published as part of Sarmento-Soares, Luisa Maria, Lazzarotto, Henrique, Py-Daniel, Lucia Rapp & Leitão, Rafael Pereira, 2016, A new Centromochlus Kner, 1858 (Siluriformes: Auchenipteridae: Centromochlinae) from the transition between Amazon floodplain and Guiana shield, Brazil, pp. 1-12 in Neotropical Ichthyology (Neotrop. Ichthyol.) 14 (4) on page 6, DOI: 10.1590/1982-0224-20160030, http://zenodo.org/record/497543
Peckoltia compta Oliveira, Zuanon, Py-Daniel & Rocha, 2010, new species
No full textPeckoltia compta new species (Figs. 1, 2) Holotype: INPA 6865, 56.6 mm SL, Brazil, Pará, Itaituba, Pimental, rio Tapajós downstream from the confluence with rio Jamanxim, 04º 41 ’06”S 056º 23 ’07”W. 21 October 1991, L. Rapp Py-Daniel & J. Zuanon. Paratypes: Brazil, Pará: INPA 6782, 4, 1 cs, 45.3–61.5 mm SL, ilha da Terra Preta, rio Jamanxim, 04º 58 ’06.1”S 056º 29 ’ 12.3 ”W. 20 October 1991, L. Rapp Py-Daniel and J. Zuanon. MCP 45008, 1, 42.2 mm SL, same data as INPA 6782. MPEG 18643, 1, 44.2 mm SL, ilha da Terra Preta, rio Jamanxim, 04º 58 ’06.1”S 056º 29 ’ 12.3 ”W. 20 October 1991, L. Rapp Py-Daniel and J. Zuanon. MZUSP 105752, 1, 58.9 mm SL, ilha da Terra Preta, rio Jamanxim, 04º 58 ’06.1”S 056º 29 ’ 12.3 ”W. 19 October 1991, L. Rapp Py-Daniel and J. Zuanon. INPA 6975, 4, 45.5 mm SL (3 juveniles not measured), Itaituba, rio Tapajós downstream from the confluence with rio Jamanxim, 04º 41 ’06”S 056º 23 ’07”W. 23 October 1991, L. Rapp Py-Daniel and J. Zuanon. Diagnosis. Peckoltia compta can be distinguished from all of its congeners by presenting a clear stripe inside the dark brown bars running from snout tip to anterior margin of eyes (vs. absence of the clear stripe and a mottled appearance in P. vittata, and a mix of vermiculations and spots on the head of the other congeners). It can be further distinguished from its congeners (except from P. b a c h i) by the presence of small dark brown spots only on fin rays, rarely reaching the interradial membranes (vs. dark spots on interradial membranes or dark stripes covering the whole fin or plain). It can be distinguished from P. b a c h i by the interorbital distance, 31.1-32.9 (vs. 51.5 –71.0% HL). Peckoltia compta can be distinguished from all its congeners except P. bachi, P. braueri, P. brevis, P. cavatica, P. lineola and P. vittata by its larger cleithral width 32.3–34.6 (vs. 20.8–32.4 % SL). It can be distinguished from all its congeners except P. cavatica, P. s nethlageae and P. sabaji by its smaller head depth 57.8–62.2 (vs. 63.5–87.7 % HL). Description. Morphometric data presented in Table 1. Small-sized loricariid, with largest specimen measuring 61.5 mm SL. Body section rounded anteriorly in dorsal view, becoming gradually narrower from dorsal-fin origin to caudal fin. Body short and deep, with deepest point at insertion of dorsal fin. Dorsal profile convex, rising as straight line from snout to orbit, becoming flat from orbit to dorsal-fin insertion and gently declining from this point to end of caudal peduncle. Head short and without ridges or carenae. Head and snout completely covered by strong odontodes. Few (around five) hypertrophied odontodes on cheek plates, such odontodes completely exposed and partly encased in depression above cleithrum. Eye laterodorsal with small but conspicuous iris without diverticulum or flap; orbit round. TABLE 1. Morphometrics of Peckoltia compta new species. SD= standard deviations; L= length; W=width; D=distance; SL= standard length; HL= head length; Dp=depth; Min= minimum; Max= maximum. Parieto-supraoccipital short, bearing small but conspicuous crest. Parieto-supraoccipital limited posteriorly by set of predorsal plates arranged as one disjunct pair, followed by one or two closely attached pairs plus one single plate immediately anterior to dorsal-fin spinelet. Lateral line with 24–25 plates, four to five plates between dorsal and adipose fins, 10–12 plates between anal and caudal fins. Body not carenate or keeled. Plates of midventral series behind pectoral fin slightly bent; plates encircling dorsal-fin base also slightly bent. Caudal peduncle deep and covered by five series of plates. All body plates covered by strong odontodes. Gular area naked, gill-openings small. Abdomen almost completely naked except for some small patches of odontodes between pectoral fins of large specimens; single plate between urogenital opening and anal-fin insertion. All fin rays carrying odontodes, more developed on first (undivided) ray. Dorsal fin short, composed by spinelet, one spine, and seven soft, segmented and branched rays (II+ 7). Dorsal-fin spine with small odontodes along its anterior margin. Dorsal-fin spinelet triangular and with locking mechanism. Dorsal fin reaching preadipose plate when adpressed; extended membrane between last dorsal-fin ray and dorsum absent. Pectoral fin with spine and six soft, segmented and branched rays (I+ 6); locking mechanism present. Pectoral fin reaching proximal third of pelvic when adpressed. Pelvic fin with six rays; first thickened and unbranched and five branched (i+ 5). Pelvic-fin tip reaching posterior end of anal-fin base. Anal fin with 5 rays; first thickened and unbranched and four branched (i+ 4). Adipose-fin spine with small odontodes on its anterior surface. Caudal fin slightly emarginate. Caudal fin with 16 rays, two external thickened, unbranched and bearing small odontodes plus 14 inner branched rays (i+ 14 +i). Mouth small; lips well developed and densely papillate. Border of lower lip densely fringed with delicate papillae. Buccal papillae small and low. Maxillary barbel nearly equal to horizontal orbit diameter. Premaxillary of similar size of dentary. Dentaries always forming acute angle. Premaxillary teeth 18–27, dentary teeth 17–27. Premaxillary and dentary teeth of similar size, small, strong, and unevenly cuspidate with internal cusp larger than external. Color in alcohol. Preserved specimens of Peckoltia compta with light brown body covered with transversal dark brown large and irregular bars. Bars slanted anteroposteriorly and roughly Y-shaped in lateral view, forming regular design resembling a mask around dorsal-fin base. Some large round dark blotches on flanks between dark bands. Head pigmentation (in dorsal view) composed by black anostomosing stripes at interorbital region, extending laterally to snout edge at interopercular area. Snout with longitudinal black mark with thin clear stripe in the middle, extending from internarinal space to snout edge, flanked by similar marks from each nare to snout edge. Snout marks roughly resembling a keyboard in dorsal view. All fins with dark brown blotches on rays, very rarely reaching interradial membranes. Black blotch at tip of adipose fin spine. Abdominal surface plain white. Color in life (Fig. 1). Overall striped and spotted color pattern as described above only more conspicuous on living specimens, with yellowish color background and very dark lines and spots, and hyaline interradial membranes. bachi braueri brevis caenosa cavatica compta furcata Percents of standard length Head L 34.6–39.1 Cleithral W 25.7–31.1 31.4–33.1 20.8–28.3 Thorax L 25.1–31.3 Pectoral–spine L 31.5–35.2 Postanal L 33.2–38.3 31.3–36.9 28.0– 31.9 32.2–39.5 Dorsal spine L 30.0– 41.8 26.7–31.9 Dorsal-adipose D 14.9–21.4 10.0–13.0 Percents of head length Snout L 51.6–55.7 Internares W 15.5 –24.0 13.8–20.7 9.9–13.9 Interorbital W 51.5 –71.0 38.7–53.7 36.9–56.3 31.1–32.9 Head Dp 66.9 –76.0 66.3–75.9 63.6–77.4 66.6 –74.0 61.8–71.8 57.8–62.2 66.6–72.1 Dentary L 5.4–11.4 12.5 –17.0 Premax. L 5.5–10.5 13.3–17.3 continued. lineola oligospila sabaji snetlhageae vermiculata vittata Percents of standard length Head L 28.4–34.5 Cleithral W 24.7–31.4 21.8–27.9 28.7–31.2 28.9–29.5 Thorax L 20.0– 23.8 19.4–25.1 21.2–24.7 Pectoral–spine L 28.6–29.7 Postanal L 34.3–38.8 35.7 –41.0 33.9–35.6 Dorsal spine L 31.9–48.9 Dorsal-adipose D 14.1–17.1 16.0– 20.3 15.5–16.9 Percents of head length Snout L 58.0– 61.2 57.2–63.3 55.9–61.8 Internares W 14.9–16.4 Interorbital W 38.5–51.5 35.2 –49.0 38.2–41.8 Head Dp 68.9–77.9 68.2–80.4 70.5–75.6 63.5–87.7 Dentary L Premax. L 8.0– 11.8 11.2–12.7 Distribution. The specimens were collected on two localities: in rio Tapajós, near the village of Pimental, downstream from the confluence with rio Jamanxim, and in rio Jamanxim around ilha da Terra Preta (Figure 3). The Tapajós and Jamanxim are clear water rivers and the specimens were collected in moderate to fast flowing waters, over a rocky bottom. Etymology. The specific epithet, compta, is from the Latim comptus for ornamented, adorned. The name is a reference to the particular bold color pattern shown by this new species. Treated as an adjective.Published as part of Oliveira, Renildo Ribeiro De, Zuanon, Jansen, Py-Daniel, Lucia Rapp & Rocha, Marcelo Salles, 2010, Peckoltia compta, a new species of catfish from the Brazilian Amazon, rio Tapajós basin (Siluriformes: Loricariidae), pp. 48-56 in Zootaxa 2534 on pages 49-54, DOI: 10.5281/zenodo.19659
Poor taxonomic sampling undermines nomenclatural stability: A reply to Roxo et al. (2019)
No full textReis, Roberto E., Britski, Heraldo A., Britto, Marcelo R., Buckup, Paulo A., Calegari, Bárbara B., Camelier, Priscila, Delapieve, Maria Laura S., Langeani, Francisco, Lehmann, Pablo, Lucinda, Paulo H. F., Marinho, Manoela, Martins, Fernanda O., Menezes, Naércio A., Moreira, Cristiano R., De Pinna, Mário C. C., Pavanelli, Carla S., Rapp Py- Daniel, Lucia H., Sousa, Leandro M. (2019): Poor taxonomic sampling undermines nomenclatural stability: A reply to Roxo et al. (2019). Zootaxa 4701 (5): 497-500, DOI: https://doi.org/10.11646/zootaxa.4701.5.1
Harttia panara Oyakawa & Fichberg & Py-Daniel 2018, new species
No full textHarttia panara, new species (Figs. 2, 4, 5, 6; Tables 1, 2) Harttia sp. Xingu2— Covain et al., 2016 (reference, distribution, molecular phylogeny). Holotype. MZUSP 101392, 105.7 mm SL, Brazil, Pará, Rio Xingu Basin, Rio Curuá, tributary of Rio Iriri, above the Cachoeira do Curuá waterfall, on the bridge at highway Cuiabá-Santarém (BR-163), mun. Novo Progresso, 8º53'54"S 54°59'20"W, A.L. Netto-Ferreira, J.L. Birindelli, L.M. Sousa & P.H. Hollanda-Carvalho, 22 January 2009. Paratypes. Brazil, Pará, Rio Xingu Basin: MZUSP 115484, 1, 73.1 mm SL, INPA-ICT 0 53239, 99.8 mm SL, collected with holotype. MZUSP 97080, 2, 77.8–102.8 mm, Rio Curuá, tributary of Rio Iriri, on the bridge at BR- 163, mun. Novo Progresso, 8º53'54"S 54°59'20"W, J.L. Birindelli, L.M. Sousa, A.L. Netto-Ferreira, M.H. Sabaj, N.K. Lujan, 29 October 2007. MZUSP 97088, 9 (3 c&s), INPA-ICT 0 53241, 2, 72.1– 8.5 mm SL, Rio Curuá, tributary of Rio Iriri, in the cofferdam of the Buriti Hydroeletric Power, mun. Novo Progresso, 8º46'09"S 54°57'02"W, J.L. Birindelli, L.M. Sousa, A.L. Netto-Ferreira, M.H. Sabaj, N.K. Lujan, 21 October 2007. MZUSP 118551, 2, 99.6–123.3 mm SL, Rio Curuá, tributary of Rio Iriri at the Cachoeira do Curuá waterfall, near the village of PCH Curuá and Churrascaria Cachoeira do Curuá, between the 40 m falls and the three small falls of approximately 1 to 5 m, mun. Novo Progresso, 8˚44’9.5”S 54˚57’46.5”W, 0 6 August 2015, O.T. Oyakawa, W.M. Ohara & M. Pastana. Diagnosis. Abdomen completely covered by plates readily discriminates H. panara from members of the H. loricariformis group (naked abdomen) and from members of H. rhombocephala group (abdomen partially covered). Harttia panara can be distinguished from H. surinamensis, H. fowleri, and H. duriventris by having the caudal peduncle slightly compressed laterally after confluence of lateral keels vs. caudal peduncle strongly compressed laterally after confluence of lateral keels. In addition, H. panara can be distinguished from these species, plus H. dissidens, by having a smaller orbital diameter, respectively 14.8–19.0% [16.6%] vs. 19.2–23.0% [20.9%] in H. surinamensis, 20.8–23.1% [22.0%] in H. fowleri, 18.1–25.5% [20.8%] in H. duriventris and 21.4– 24.1% [22.5%] in H. dissidens. Also, the interorbital width discriminates H. panara, 28.6–35.2% [31.0%] from H. dissidens, 23.6–26.2% [24.8%]. Harttia panara can be distinguished from H. absaberi by having two large preanal plates vs. one pre-anal plate; and by the absence of a specialized chain-like bone structure of second dorsal-fin spine vs. presence in H. absaberi. H. panara can also be distinguished from H. villasboas by having a smaller head length 22.8–24.8% [23.4%] vs. 24.0–29.9% [26.3%] of SL. Finally, H. panara can be distinguished from H. villasboas by having the anterior profile of head roughly triangular in dorsal view vs. elliptical in dorsal view. Description. Measurements and counts in the Table 2. Member of H. fowleri group. Body dorsoventrally depressed and elongated, widest at cleithrum. Dorsal profile of body straight and abruptly ascending from tip of snout to anterior region of orbit, and slightly convex from this point to dorsal-fin origin, and gently descending to end of caudal peduncle. Ventral profile of body straight from tip of snout to caudal fin. Anterior profile of head moderately triangular in dorsal view. Eye roughly oval, inferior margin of orbit slightly concave. Dorsal flap of iris present. Interorbital flat, parieto-supraoccipital flat or slightly convex. Tip of snout with small, oval and naked area completely circumscribed by rostral plates bearing small odontodes. Lips covered by papillae, more numerous and smaller in lower lip. Posterior border of lower lip not reaching anterior margin of pectoral girdle. Premaxilla with 31–58 [33] bicuspid teeth, both cusps almost with same size; dentary with 29–36 [32] teeth, inner cusp slightly longer than outer. Maxillary barbel reaching 50% of de length of lower lips, joined to lip by small flap of tissue; barbel with small papillae. Presence of a conspicuous spherical papilla in the roof of mouth anterior to the oral valve. Infraorbital series with five plates; infraorbital 5 contacting inferior branch of sphenotic. Inferior region of orbit delimited by infraorbitals 3 to 5. Canal plate exposed, roughly triangular. Abdominal region completely covered by roughly trapezoidal to quadrangular small plates. Plates near gular area contacting canal plate. Plates covering posterior region of abdomen larger than those in gular area. Eight to 11 [10] lateral abdominal plates, rectangular and elongate. Preanal plates two, roughly rectangular and well developed, bordered anteriorly by a line of irregular plates. Five longitudinal series of plates on trunk. Median series with 27–29 [28] perforated plates. Two weakly developed, parallel and longitudinal odontodes keels coalesced at 19th–20th plates. Dorsal fin II,7; its origin on vertical through above pelvic-fin origin. Spinelet, or first spine, half-moon shaped, approximately with same width of base of second dorsal-fin spine. Dorsal-fin spine articulates with second dorsalfin pterygiophore through a condyle on dorsal region of this structure. Tip of last rays of dorsal fin, when adpressed, reaching vertical through of origin of last anal-fin ray. Pectoral fin I,6; tip of pectoral-fin spine and first two branched rays surpassing insertion of pelvic-fin spine. Mature males with dorsal region of pectoral-fin spine covered by well-developed odontodes strongly bent and turned forward. Pelvic fin i,5; tip of pelvic-fin spine reaching insertion of anal-fin spine. Anal fin i,5; tips of first and last basal radials of anal fin lying below hemal spines of vertebrae 14–18, respectively. Hemal spines of vertebrae 14–18 bifid; hemal spines of vertebrae 14, 16, and 18 very large. First anal-fin pterygiophore roughly rectangular shaped and not covered by skin. Caudal fin emarginated, i,12,i, with five supracaudal plates on its base; median plate bearing lateral line canal. Two procurrent rays on base of upper and lower caudal-fin rays. Caudal peduncle slightly compressed laterally after confluence of lateral keels. Color in alcohol. Dorsal region of body light brown, with five transverse inconspicuous dark brown marks, first at origin of dorsal fin, second starting at end of last rays of dorsal fin, followed by third and fourth in middle of caudal peduncle, and fifth at origin of caudal-fin rays. In some specimens, including holotype, anterior and posterior margins of marks more intensely pigmented. Ventral region light brown. All fins with four to five transverse dark brown marks. Base of anal-fin spine with dark brown spot. Base of caudal-fin inner rays with dark bar. Etymology. The specific name, panara, is a patronym that honors the Panará Indians, also called Krenakore, Kreen-Akore or Krenhakore. They call themselves Panará, which means human being or “gente” or “seres humanos” in Portuguese. In the beginning of the 20th century, they were considered extinct. In 1950, however, during the Villas Boas Brothers expedition to the Serra do Cachimbo region, the Panarás were spotted again. Only in 1969 was a tentative contact of the Panarás initiated and, in 1972, Orlando and Claudio Villas Boas established the first contact with them in the region of Serra do Cachimbo. In 1973, when the Cuiabá-Santarém highway (BR- 163) began to be built, crossing through their territory, they were removed to the Parque Indígena do Xingu. Finally, in 1995 they recovered the right to live in part of their original territory in Southern Pará State. A noun in apposition. Distribution: Harttia panara is, so far, only known from above the two great falls of Rio Curuá, a tributary of Rio Iriri, in the area of Serra do Cachimbo. Collections made bellow the two falls of Rio Curuá have failed in capture the species, suggesting that the new species mighty be restricted to the portion of the river above the two great falls (Figs. 4, 5).Published as part of Oyakawa, Osvaldo T., Fichberg, Ilana & Py-Daniel, Lucia Rapp, 2018, Three new species of Harttia (Loricariidae: Loricariinae) from Serra do Cachimbo, Rio Xingu basin, Pará, Northern Brazil, pp. 75-90 in Zootaxa 4387 (1) on pages 78-81, DOI: 10.11646/zootaxa.4387.1.3, http://zenodo.org/record/118655
Revisão taxônomica e relação filogenética das espécies de Crenicichla grupo wallacii (Perciformes: Cichlidae)
No full textCrenicichla wallacii group sensu Kullander (1990) was compose of six species (update in 1991,
with description of C. virgatula). Taxonomy revision of Crenicichla wallacii group had type
material and non-type found at nationals collections (INPA, MPEG, MZUSP), plus loans of
international collection in partnership (ANSP, Philadelphia, U.S.A.), original descriptions and
use of auxiliary tools for analysis (magnifiers, digital x-ray chamber). Examined a total of 500
examples of Crenicichla wallacii group and Teleocichla. Species recognized in wallacii group
in this revision: Crenicichla compressiceps (Tocantins- Araguaia rivers), C. notophthalmus
(Negro river), C. regani (Trombetas, Tapajós, Solimões, Uatumã, Purus, Madeira, Amazonas,
Guamá, Tocantins and Marajó rivers), C. virgatula (Branco river), C. urosema (Tapajós river),
and C. wallacii (Essequibo, Orinoco and Branco rivers). All this species presents diagnoses,
descriptions, color observations, sexual dimorphism, morphometric and meristic table and
geographic map distribution. In this project were proposed two new species, Crenicichla sp.
n. "Maicuru" (Maicuru river) and Crenicichla sp. n. "Xingu" (Xingu river), and a proposal to
withdraw Crenicichla heckeli out of wallacii group, hereafter, synonimize to genre Teleocichla.
It’s presented a identification key for eight species of Crenicichla wallacii group, restricted of
Amazon basin. At the end, presents a phylogenetic tree species analyzed (Crenicichla +
Teleocichla) with addiction species of different Crenicichla group and Taeniacara candidi as
outgroup, result that the wallacii group is monophyletic, and C. heckeli is outside the wallacii
group.Crenicichla do grupo wallacii sensu Kullander (1990) somam por seis espécies (com atualização
em 1991, com a descrição de C. virgatula Ploeg, 1991). A revisão taxonômica das
espécies detes grupo contou com material- tipo e não-tipo encontrados nas coleções do Brasil
(INPA,MPEG, MZUSP), além de empréstimos de coleção internacional em parcerias (ANSP
- Filadélfia, E.U.A.), e descrições originais. Foram examinados um total de 500 exemplares
de Crenicichla, e algumas Teleocichla para fins comparativos, já que uma vez Ploeg (1991)
incluiu estas espécies no grupo wallacii. Do grupo "wallacii" foram reconhecidas na revisão:
Crenicichla compressiceps (rios Tocantins- Araguaia), C. notophthalmus (rio Negro), C. regani
(rios Trombetas, Tapajós, Solimões, Uatumã, Purus, Madeira, Amazonas, Guamá, Tocantins
e rios e riachos da Ilha de Marajó), C. virgatula (rio Branco), C. urosema (rio Tapajós), e
C. wallacii (rios Essequibo, Orinoco, Branco). Para todas as espécies é apresentadas uma
diagnose, descrição, morfologia externa, dimorfismo sexual, tabelas com dados morfométricos
e merísticos e mapa de distribuição geográfica. Neste trabalho são propostas duas espécies
novas, Crenicichla sp. n. ”Maicuru” (rio Maicuru) e Crenicichla sp. n. ”Xingu” (rio
Xingu), e uma proposta nova combinação de Crenicichla heckeli para o gênero Teleocichla.
É apresentada uma chave de identificação para as oito espécies de Crenicichla gr. wallacii,
que são restritas à bacia amazônica. Também é apresentada uma árvore filogenética com as
espécies analisadas (Crenicichla + Teleocichla) com inclusão de espécies de Crenicichla de
diferentes grupos, e Taeniacara candidi como grupo-externo. Neste arranjo, as espécies do
grupo "wallacii" formam um grupo monofilético, e C. heckeli aparece fora do grupo wallacii
e das limitações do gênero Crenicichla
Morfologia comparada da cintura pélvica de representantes da superfamília loricarioidea (ostariophysi siluriformes)
No full textThe morphology of the pelvic girdle is compared throughout the six families of
Loricarioidea. Representatives of the families were: Nematogenyidae (1 species),
Trichomycteridae (7 species), Callichthyidae (6 species), Scoloplacidae (2 species),
Astroblepidae (1 species) and Loricariidae (8 species). All families showed
synapomorphies on the pelvic girdle. Nematogenyidae has a laminar extension on
the basipterygium and cartilages on the 1 st and 2 nd pelvic rays; Trichomycteridae,
besides showing a large diversity of shapes of pelvics, have structures such as fused
cartilage, very long internal anterior processes and posterior cartilage on
basipterygium; Callichthyidae showed a very peculiar shape of pelvic girdle but very
conservative throughout the family, and some features like a unique conexion of the
pelvics with the axial skeleton, strong tridimensional shape of the basipterygium and
external anterior processes modified; Scoloplacidae also showed a very peculiar and
conservative pelvic girdle, without anterior or posterior processes, and with a reduced
and posterior sutural joint between the basipterygia; Astroblepidae shows a very
distinguished pelvic girdle, with long posterior processes, racquet-like
lateropterygium and musculature well developed; and Loricariidae showed a spike-
like lateropterygium, synchondral joint of the basipterygia between sutures or not,
and well developed condyles for articulation of the pelvic rays. Nematogenyidae and
Trichomycteridae share a similar disposition of the anterior processes and the
presence of unfused cartilage between the basipterygia. The other Loricarioidea, or
‘advanced Loricarioidea’, already show sutural joints between the basipterygia.
Astroblepidae and Loricariidae share, among other features, the presence of the
lateropterygium, presence of condyles for articulation of the pelvic rays and
synchondral joint followed by sutures. Some new features are described for some of
the families (Nematogenyidae, Trichomycteridae and Astroblepidae). The present
work brought additional support to the current hypothesis of relationship among
Loricarioidea families.A morfologia da cintura pélvica de representantes das seis famílias de Loricarioidea
é comparada. Foram usados representantes de Nematogenyidae (1 espécie),
Trichomycteridae (7 espécies), Callichthyidae (6 espécies), Scoloplacidae (2
espécies), Astroblepidae (1 espécie) e Loricariidae (8 espécies). Todas as famílias
apresentaram sinapomorfias relacionadas à cintura pélvica. Nematogenyidae
apresenta uma expansão laminar no basipterígio e cartilagens nos 1o e 2o raios
pélvicos; Trichomycteridae, apesar de possuirem uma grande diversidade de formas
de pélvicas, apresentaram características como presença de cartilagem fusionada,
processos anteriores internos extremamente longos e presença de cartilagem
posterior; Callichthyidae apresentaram uma cintura pélvica muito diferenciada mas
conservada dentro da família, e como características únicas a conexão da pélvica
com o esqueleto axial em alguns representantes, tridimensionalidade acentuada na
forma do basipterígio e modificações nos processos anteriores externos;
Scoloplacidae também apresentaram a pélvica muito modificada e conservada na
família, sem processos anteriores e posteriores, e com um ponto de sutura entre os
basipterígios muito reduzido e posterior; Astroblepidae apresenta uma pélvica muito
diferenciada, com longos processos posteriores, lateropterígio em forma de raquete
e musculatura muito desenvolvida; e Loricariidae apresentaram lateropterígio em
forma de bastão, articulação sincondral entre os basipterígios seguida por suturas ou
não, e côndilos bem desenvolvidos para articulação dos raios pélvicos.
Nematogenyidae e Trichomycteridae compartilham uma disposição semelhante dos
processos anteriores e presença de cartilagem não fusionada entre os basipterígios.
Os demais Loricarioidea, ou ‘Loricaroidea avançados’, já apresentam uma
articulação com suturas entre os basipterigios. Astroblepidae e Loricariidae
compartilham, entre outras estruturas, a presença de lateropterígio, presença de
côndilos para articulaçao dos raios pélvicos e articulação sincondral dos
basipterigíos seguida por suturas. Algumas características novas são descritas para
algumas das famílias (Nematogenyidae, Trichomycteridae e Astroblepidae). O
presente estudo veio dar um suporte adicional a atual proposta de relacionamento
entre as famílias de Loricarioidea
A new species of Bryconops (Characiformes: Iguanodectidae) from Atlantic coastal drainages of Suriname and French Guiana
No full textA new species of Bryconops is described based on its unique caudal-fin color pattern, with a dark blotch occupying the mid-basal region of the caudal-fin dorsal lobe, and a combination of 29-32 branched anal-fin rays, 44-47 perforated scales in the lateral line, six rows of scales above the lateral line, and a deep body (30.3-31.7 % SL). The new species belongs to the subgenus Bryconops based on its edentulous and short maxilla, with the posterior extension of that bone not reaching the junction between the second and third infraorbitals. The new species was previously reported in the literature as B. caudomaculatus. However, these species differ from each other in morphometric and meristic characters, as well as in color pattern. Comments on distribution of Bryconops species in coastal drainages of Suriname and French Guiana additional support for biogeographic hypotheses in this area.All Catfish Species ProjectFundacao de Amparo a Pesquisa do Estado do AmazonasConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Inst Desenvolvimento Sustentavel Mamiraua, Lab Ecol & Biol Peixes, Estr Bexiga 2584, BR-69553225 Tefe, AM, BrazilUniv Estadual Paulista, Dept Biol Estrutural & Func, Inst Biociencias, R Prof Dr Antonio Celso Wagner Zanin 250, BR-18618689 Botucatu, SP, BrazilDrexel Univ, Dept Ichthyol, Acad Nat Sci, 1900 Benjamin Franklin Pkwy, Philadelphia, PA 19103 USAInst Nacl de Pesquisas da Amazonia, Colecao Peixes, Av Andre Araujo 2936, BR-69060001 Manaus, Amazonas, BrazilUniv Estadual Paulista, Dept Biol Estrutural & Func, Inst Biociencias, R Prof Dr Antonio Celso Wagner Zanin 250, BR-18618689 Botucatu, SP, BrazilAll Catfish Species Project: NSF DEB-0315963CNPq: 164059/2020-
Taxonomic revision of Hopliancistrus Isbrücker & Nijssen, 1989 (Siluriformes, Loricariidae) with redescription of Hopliancistrus tricornis and description of four new species.
No full textHopliancistrus is an Ancistrini genus diagnosed by having few and very strong cheek odontodes on interopercular area, and a patch of strong and stiff odontodes on the antero-lateral border of the snout. The type species is herein redescribed based on types and recently collected specimens. In addition, four new congeneric species are described based on specimens collected in other parts of the Rio Xingu and Rio Tapajós basins. Hopliancistrus tricornis is distributed in the lower Rio Tapajós and is diagnosed by the possession of four branched anal-fin rays and relatively large white to yellow spots on trunk and pectoral and pelvic fins, and dark brown spots on dorsal, caudal and anal fins. Hopliancistrus munduruku is described based on specimens from Rio Jamanxim (Rio Tapajós basin) and Rio Curuá (Rio Xingu basin) and is diagnosed by the possession of five branched anal-fin rays and large yellow blotches on trunk and dark brown to black spots over the fins. Hopliancistrus wolverine is distributed in the rapids of the lower and middle Rio Xingu and is diagnosed by the possession of five branched anal-fin rays and conspicuous small yellow dots on head, trunk and fins. Hopliancistrus xikrin is distributed in medium- to small-sized tributaries of the lower portion of Rio Xingu basin, and is diagnosed by absence of contact between the transverse process of the first dorsal-fin pterygiophore and the transverse process of the second pterygiophore. Hopliancistrus xavante is distributed in the tributaries of upper Rio Xingu basin, and is diagnosed by having a thick skin covering the nuchal plate; by having large white spots on trunk and fins; and by the possession of five branched anal-fin rays. An osteological description and a key for species identification are also provided
Investigação dos efeitos neuroprotetores da grelina e do neuropeptídeo Y em um modelo experimental da doença de Alzheimer
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Neurociências, Florianópolis, 2012.O acúmulo da proteína beta amilóide (AB) no sistema nervoso central (SNC) e os prejuízos cognitivos são sinais clássicos da doença de Alzheimer que estão fortemente associados ao estresse oxidativo e às alterações colinérgicas. Um número crescente de trabalhos tem relacionado à obesidade como um fator de risco para o desenvolvimento da doença de Alzheimer. Durante o ganho de peso existe uma redução nos níveis plasmáticos e no SNC dos hormônios orexígenos grelina (Ghr) e neuropeptídeo Y (NPY), que além de regularem a ingesta de alimentos, também participam da modulação de processos cognitivos, emocionais e neurodegenerativos. No presente estudo, foram investigados os efeitos do pré-tratamento com Ghr ou NPY sobre as alterações comportamentais e neuroquímicas induzidas pela infusão intracerebroventricular (i.c.v.) do peptídeo AB1-40, utilizado como um modelo experimental da doença de Alzheimer. Grupos independentes de camundongos albinos (3 meses de idade) receberam uma administração aguda de Ghr (3 nmol/µl, i.c.v.), NPY (0.0234 umol/uL, i.c.v.) ou PBS (i.c.v.) 15 min antes da infusão do AB1-40 (400 pmol/camundongo, i.c.v.). De 9 a 14 dias após os tratamentos, os animais foram avaliados em uma bateria de testes comportamentais para a investigação das funções cognitivas (realocação do objeto), emocionais (suspensão pela cauda e labirinto em cruz elevado) e locomotoras (campo aberto). Ao final dos testes comportamentais, os animais foram sacrificados para a avaliação da captação de glutamato no hipocampo. As analise de parâmetros bioquímicos relacionados ao estresse oxidativo e atividade da enzima acetilcolinesterase (AchE) foram realizadas 24 h após o tratamento com Ghr, NPY e AB1-40. O tratamento prévio com Ghr ou NPY preveniu os prejuízos na memória espacial e aumento no tempo de imobilidade no teste de suspensão pela cauda induzidos pela infusão i.c.v. de AB1-40. Além disso, o peptídeo AB1-40 induziu uma significativa peroxidação lipídica, redução na atividade da enzima glutationa redutase (GR) e na captação de glutamato, aumento na atividade da enzima AchE no córtex pré-frontal e/ou hipocampo de camundongos que foram prevenidos pelo pré-tratamento com Ghr ou NPY. Em conjunto, os resultados do presente estudo sugerem que a Ghr e o NPY são capazes de prevenir os déficits cognitivos induzidos pelo peptídeo AB1-40 e apresentar um comportamento tipo antidepressivo em camundongos, sendo estes efeitos protetores mediados, ao menos em parte, pela inibição do estresse oxidativo e disfunção dos sistemas glutamatérgico e colinérgico.Abstract : The accumulation of amyloid beta (AB) protein in the central nervous system (CNS) and the cognitive impairments are classic signs of Alzheimer's disease that are strongly associated with oxidative stress and changes in cholinergic system. A growing number of studies have related the obesity as a risk factor for the development of Alzheimer's disease. During the weight gain there is a reduction in CNS and plasmatic levels of orexigenic hormones ghrelin (GHR) and neuropeptide Y (NPY), which regulates the food intake and also participates in the modulation of cognitive, emotional and neurodegenerative disorders. In this study, we investigated the effects of pretreatment with Ghr or NPY on the behavioral and neurochemical changes induced by intracerebroventricular (i.c.v.) infusion of AB1-40 peptide, used as an experimental model of Alzheimer.s disease. Independent groups of Swiss albino mice (3 months old) received a single acute administration of Ghr (3 nmol/uL, i.c.v.), NPY (0.0234 umol/ uL, i.c.v.) or PBS (i.c.v.) 15 min before infusion of AB1-40 (400 pmol/mouse, i.c.v.). The animals were evaluated 9 to 14 days after the treatment on a battery of behavioral tests for the investigation of cognitive (object location), emotional (tail suspension and elevated plus-maze) and locomotion (open field) functions. At the end of behavioral tests, the animals were sacrificed for the evaluation of the glutamate uptake in hippocampus. The analysis of biochemical parameters related to oxidative stress and activity of the enzyme acetylcholinesterase (AChE) were performed 24 h after treatment with Ghr, NPY and AB1-40. Pretreatment with Ghr or NPY prevented the decline in spatial memory and the increased in immobility time in tail suspension test induced by the infusion icv of AB1-40. Moreover, the peptide AB 1-40 induced a significant lipid peroxidation, reduction in glutathione reductase (GR) activity and glutamate uptake, also causes an increase in enzyme AChE activity in the prefrontal cortex and/or hippocampus of mice that were prevented by pretreatment with Ghr or NPY. Altogether, the result of this study suggest that Ghr and NPY are capable of preventing cognitive deficits induced by peptide AB1-40 and present an antidepressant like-effect in mice, and these protective effects are mediated, at least in part, by inhibition of stress oxidative and dysfunction of the glutamatergic and cholinergic system
A new species of Moenkhausia Eigenmann, 1903 (Characiformes, Characidae) from the upper Rio Negro basin, Brazil
No full textA new species of Moenkhausia is described from Rio Curicuriari and Rio Tiquié, both right-bank tributaries of the upper Rio Negro basin, Amazonas State, Brazil. The new taxon differs from all congeners, except M. agnesae and M. beninei, by the combination of a sinuous humeral blotch, similar to a compressed letter Z, and distinct dark longitudinal stripes along the body sides. The new species can be distinguished from M. agnesae and M. beninei by the presence of a single humeral blotch and of longitudinal stripes running through the center of the scales, more conspicuous dorsally1072232238COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DO AMAZONAS - FAPEAMsem informação2011/51532-7; 2013/20936-0062.00350/201
