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160 results for “Osteoglossomorpha”
FIGURE 8. Petrocephalus odzalaensis n in African weakly electric fishes of the genus Petrocephalus (Osteoglossomorpha: Mormyridae) of Odzala National Park, Republic of the Congo (Lékoli River, Congo River basin) with description of five new species
FIGURE 8. Petrocephalus odzalaensis n. sp. of the Lékoli River system of Odzala National Park, Republic of the Congo. A. Photograph of a live specimen (no scale). B. Photograph of the preserved holotype (CU 88048; scale bar = 1.0 cm). C. EOD waveforms. One EOD was arbitrarily selected from each recorded individual and superimposed with the other recordings (N = number of individuals). All EODs are scaled to the same peak-to-peak voltage, and they are plotted (head-positive up) on the same time scale as overlays centered on the largest positive peak of each waveform (scale bar = 0.2 msec).
FIGURE 2 in African weakly electric fishes of the genus Petrocephalus (Osteoglossomorpha: Mormyridae) of Odzala National Park, Republic of the Congo (Lékoli River, Congo River basin) with description of five new species
FIGURE 2. Knollenorgan rosettes depicted on a schematic drawing of the head of a specimen of Petrocephalus pulsivertens n. sp. Dense clusters of Knollenorgan electroreceptors on the heads of this and several other Petrocephalus species were described by Harder (1968) as the "Augenrosette," "Nackenrosette" and "Kehlrosette," depending on their position on the head. Each black point represents a single Knollenorgan electroreceptor. Several isolated Knollenorgans occur outside these three rosettes (in this individual of P. pulsivertens), but they are not indicated in the drawing for clarity.
FIGURE 1 in A new species of Petrocephalus Marcusen 1854 (Osteoglossomorpha: Mormyridae) from the Sanaga River basin, Cameroon
FIGURE 1. Map of the hydrographic system of Cameroon (top-left inset showing the location of Cameroon in Africa). The Sanaga River basin is highlighted with deep grey lines. The boundaries among the faunal regions are indicated with black dashed lines. The filled black circle indicates the type locality of Petrocephalus similis n. sp. and the open circle indicates the second known locality.
FIGURE 2. Petrocephalus similis n in A new species of Petrocephalus Marcusen 1854 (Osteoglossomorpha: Mormyridae) from the Sanaga River basin, Cameroon
FIGURE 2. Petrocephalus similis n. sp. from Djerem River near the village of Mbakaou, Adamoua province, Cameroon. A. Photograph of a live specimen ~100 mm SL showing coloration in life (CU 93219), photo by Duncan T Reid. B. Photograph of the preserved holotype (CU 95318, scale bar = 1.0 cm), photo by John P. Sullivan. C. Photograph of a preserved paratype (MNHN 1978-0720), photo by Claude Ferrara.
FIGURE 3 in A new species of Petrocephalus Marcusen 1854 (Osteoglossomorpha: Mormyridae) from the Sanaga River basin, Cameroon
FIGURE 3. Petrocephalus phylogenetic tree (18 species, 56 haplotypes, 66 specimens) estimated by maximum likelihood using complete cytochrome b sequences (see text for details on the tree reconstruction method). Cytochrome b sequences of Gnathonemus petersii, Mormyrops nigricans and Myomyrus macrops were used to root the tree. Numbers at nodes are bootstrap proportions represented as percentages. Bootstrap proportions are not shown for intraspecific relationships. The position of Petrocephalus similis n. sp. is indicated within grey ovoid. Scale bar corresponds to 0.04 substitutions per site. Specimen origins are indicated after their species names.
FIGURE 4. A in Petrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin)
FIGURE 4. A) The 13 parsimony-informative positions from the cytochrome b sequences of seven specimens of Petrocephalus zakoni from three Congolese ecoregions: the Sangha Ecoregion (at the Odzala-Kokua National Park); the Cuvette Centrale Ecoregion (at Yangambi); and Sudanic Congo-Oubangui Ecoregion (at Ouaka and Oubangui Rivers) and two specimens of Petrocephalus leo sp. nov. from the Kotto River (Sudanic Congo-Oubangui region). The base at each cytochrome b position is indicated. B) The most parsimonious tree of Petrocephalus zakoni and Petrocephalus leo cytochrome b haplotypes with branch lengths proportional to the number of substitutions (scale = one change). Tree rooted at the midpoint. C) The most parsimonious tree of Petrocephalus zakoni and Petrocephalus leo S7 first introns; only nucleotide indels (and their positions) are mapped: triangles indicate deletions and inverted triangles indicate insertions; tree rooted with Petrocephalus bovei sequence from Genbank.
FIGURE 3 in Petrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin)
FIGURE 3. Schematic drawing of Petrocephalus leo sp. nov., holotype, 76.1 mm standard length. Drawn by Yi-Hsuan Lin.
FIGURE 1 in Petrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin)
FIGURE 1. Map of the hydrographic system of the central part of the Oubangui River basin showing the Petrocephalus localities surveyed (top-left inset showing the location of the Congo basin in Africa). Filled black and open stars indicate the type locality and the second locality on the Kotto River, respectively, of Petrocephalus leo sp. nov.
FIGURE 2 in Petrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin)
FIGURE 2. Petrocephalus leo sp. nov. and Petrocephalus zakoni from the Oubangui River basin, Central African Republic. Top, photograph of a live specimen of Petrocephalus leo sp. nov. of about 70 mm standard length showing the live coloration (untagged specimen; photo by Roger Bills, SAIAB). Center, photograph of the preserved holotype of Petrocephalus leo sp. nov. (CU 95314, scale bar = 1.0 cm; photo by John P. Sullivan, CUMV). Bottom, photograph of a preserved specimen of Petrocephalus zakoni of about 70 mm standard length from the Oubangui River (Field station JPF 06-009, CU 91852; photo by John P. Sullivan, CUMV).
FIGURE 10 in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 10. Caudal skeleton of Osteoglossum bicirrhosum as figured by: a) Taverne (1977); b) Hilton (2003); c) and d) Greenwood (1967). All illustrations are redrawn from these authors.
FIGURE 6 in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 6. Caudal skeleton of Osteoglossum bicirrhosum. Specimens: a) UERJ-PMB 24; b) UERJ-PMB 31; c) MZUSP uncatalogued specimen. Anterior faces left.
FIGURE 9 in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 9. Normal and teratological specimens of Osteoglossum bicirrhosum: a) caudal region of normal specimen before and after preparation with dermestid beetles (UERJ-PMB 48); arrows indicate caudal peduncle; b) caudal region of teratological specimen, with dorsal, caudal and anal fins confluent, before and after preparation with dermestid beetles
FIGURE 3 in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 3. Caudal skeleton of Osteoglossum bicirrhosum. Specimens: a) MZUSP 3526-d; b) MZUSP 82312-18622; c) MZUSP 82331-02; d) MZUSP 22080-01; e) UERJ-PMB 25; f) MZUSP 21875-02. Bone is shown in white, and cartilage in black. Anterior faces left.
FIGURE 1. a in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 1. a) The bonytongue Osteoglossum bicirrhosum, MNRJ 1212 (306 mm SL); b) Map with the geographic distribution of the specimens examined in the present study: I. Overview of South America river drainages. The spots represent specimen localities found in the MNRJ – Neodat search page; II. Close showing the localities in the sampled area. Assigned numbers depicted in Annex 1; III. Detail of the three sub-basins with the localities of the specimens used in our geographical comparisons. Maps were composed based on the online maps from IBGE (Instituto Brasileiro de Geografia e Estatística) and from the Neodat Project – MNRJ page.
FIGURE 5 in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 5. Caudal skeleton of Osteoglossum bicirrhosum. Specimens: a) UERJ-PMB 11; b) UERJ-PMB 12; c) UERJ- PMB 13; d) UERJ-PMB 14. Bone is shown in white, and cartilage in black. Anterior faces left.
FIGURE 8 in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 8. Caudal skeleton of Osteoglossum bicirrhosum: a) "Typical" condition. ["A"]. b) Schematic drawings of the main patterns ["A", "B", "C", "D", "E" and "F"] found in specimens from the three selected localities [Negro, Trombetas and Tapaj®AEs rivers]. Varying structures are highlighted in blue. Bone is shown in white, and cartilage in black. Anterior faces left. c) Histograms showing the distribution [expressed in percentage] of the varying endoskeletal patterns in specimens from the three localities.
FIGURE 2 in Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)
FIGURE 2. Caudal skeleton of Osteoglossum bicirrhosum. Specimens: a) MZUSP 82312-18630; b) MZUSP 82319- 30738; c) MZUSP 3526-e; d) MZUSP 82312-18618; e) MZUSP 82312-18623; f) MZUSP 18290-d. Anterior faces left.
Supplementary material 1 from: Lavoue S, Sullivan J (2014) Petrocephalus boboto and Petrocephalus arnegardi, two new species of African electric fish (Osteoglossomorpha, Mormyridae) from the Congo River basin. ZooKeys 400: 43-65. https://doi.org/10.3897/zookeys.400.6743
List of specimens of Petrocephalus arnegardi and Petrocephalus boboto with EOD recording.: Explanation note: List of specimens of Petrocephalus arnegardi and Petrocephalus boboto with electric organ discharge (EOD) recording (holotypes, paratypes, non types).
Figure 4 in Petrocephalus Marcusen, 1854 (Osteoglossomorpha: Mormyridae) of the Bangweulu-Mweru ecoregion (Luapula River system, Congo basin), with the description of a new species
Figure 4. Petrocephalus phylogenetic tree (20 species, 60 haplotypes, 77 specimens, not considering the outgroups) estimated by maximum likelihood using cytochrome b sequences (see text for details on the phylogenetic reconstruction method). Cytochrome b sequences of three mormyrins species – Gnathonemus petersii, Mormyrops nigricans and Myomyrus macrops – were used to root the tree. Species names followed by specimen numbers. Numbers at nodes are bootstrap proportions (if> 50%) and are only shown for interspecific relationships. The positions of Petrocephalus frieli sp. nov. and Petrocephalus squalostoma are highlighted with grey-filled boxes. Geographical origins of the examined specimens are indicated on the right. The scale bar corresponds to 0.04 substitutions per site.
Figure 3 in Petrocephalus Marcusen, 1854 (Osteoglossomorpha: Mormyridae) of the Bangweulu-Mweru ecoregion (Luapula River system, Congo basin), with the description of a new species
Figure 3. Photographs of Petrocephalus frieli sp. nov. and Petrocephalus squalostoma from the Bangweulu-Mweru ecoregion, Luapula River system, Congo basin. (A) Preserved holotype of P. frieli sp. nov. (CU 96866, scale bar 1.0 cm) (photograph by John P. Sullivan, CUMV). (B) Live specimen of P. frieli sp. nov. of about 8.0 cm [estimated] standard length (photograph by Roger Bills, SAIAB). (C) Live specimen of P. squalostoma of about 8.0 cm [estimated] standard length (photograph by Roger Bills, SAIAB).
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