73 research outputs found
Chinchaysuyoa Marceniuk & Marchena & Oliveira & Betancur-R 2019, new genus
No full textChinchaysuyoa new genus Type species. Chinchaysuyoa labiata. Diagnosis. The Parsimony Analysis (Fig. 1a) was used to recognize the derived characters supporting Chinchaysuyoa. Morphological synapomorphies are represented by 13 derived conditions acquired independently in other ariid genera: (1) bony bridge formed by lateral ethmoid and frontal cylindrical and thin, Marceniuk et al. (2012: 16), convergent in Arius gagora, Arius arius, Arius maculatus, Arius oetik, A. madagascariensis, Aspistor, Cathorops, Cephalocassis, Cinetodus, Cryptarius, Doiichthys, Hemiarius, Nedystoma, Nemapteryx, Notarius, Pachyula, Potamarius grandoculis, P. usumacintae, and Potamosilurus; (2) vomer anterior margin very pronounced and acute, Marceniuk et al. (2012: 48), convergent in Arius, Amissidens, Aspistor, Cephalocassis, Cinetodus, Notarius (except N. planiceps and N. cookei), Osteogeneiosus, Pachyula, Plicofollis, Potamarius, except P. usumacintae, and Potamosilurus, except P. velutinus); (3) Accessory tooth plates small, transversely elongate and narrow, Kailola (2003: 50), Marceniuk et al. (2012: 58), convergent in Bagre, Cochlefelis, Galeichthys, Neoarius, Potamosilurus latirostris, and Sciades leptaspis; (4) optic foramen very large, Marceniuk et al. (2012: 65), convergent in Cephalocassis, Doiichthys, Nedystoma, and Nemapteryx); (5) anterior aortic canal opening at base of subvertebral process and anteroventrally oriented, Marceniuk et al. (2012: 70), convergent in Arius, Aspistor, Batrachocephalus, Cephalocassis, Cinetodus, Cryptarius, Doiichthys, Hemiarius, Ketengus, Nedystoma, Nemapteryx, Notarius, Osteogeneiosus, Pachyula, Plicofollis, Potamosilurus); (6) posterior process of exoccipital sutured to Müllerian ramus, Marceniuk et al. (2012: 86), convergent in Ariopsis, Potamarius, and Sciades (Fig. 3A); (7) half or less of interopercle posterior face contacting ventral margin of opercle, Marceniuk et al. (2012: 124), convergent in Batrachocephalus, Cochlefelis, Ketengus, Neoarius, Notarius, Sciades, except S. herzbergii and S. couma, Plicofollis platystomus); (8) anterior portion of interopercle compressed and bifurcate, Marceniuk et al. (2012: 125), convergent in Cathorops and Plicofollis (Fig. 3b, see Fig. 15 in Marceniuk et al. 2012); (9) interopercle anterior portion conspicuously narrow, Marceniuk et al. (2012: 126), convergent Brustiarius, Cephalocassis, Doiichthys, and Nedystoma (Fig. 3b, see Fig. 15 in Marceniuk et al. 2012); (11) metapterygoid one and a half times longer than deep in perpendicular section, Marceniuk et al. (2012: 128), convergent in Cathorops dasycephalus, Cephalocassis, Cinetodus, Cryptarius, Pachyula, and Plicofollis, Potamarius grandoculis, P. izabalensis); (12) uncinate process of third epibranchial much longer and wider than mesial portion of third epibranchial delimited by uncinate process, Marceniuk et al. (2012: 175), convergent in Plicofollis (Fig. 3c, see Fig. 23 in Marceniuk et al. 2012); (13) posterior process of cleithrum very long, Kailola (2004: 14), Marceniuk et al. (2012: 214) convergent in Cinetodus and Pachyula (Fig. 3d, see Fig. 27 in Marceniuk et al. 2012); (14) swim bladder with two chambers, Marceniuk et al. (2012: 227), convergent in Notarius grandicassis (Fig. 3e, see Fig. 1 in Marceniuk & Birindelli 2010). Additional morphological characters that diagnose the new genus from its New World relatives. cephalic shield granulated visible under the skin (vs. cephalic shield smooth, covered by muscle and scarcely visible under the skin in Bagre and Galeichthys); medial groove of neurocranium present (vs. absent in Amphiarius, Aspistor and Notarius); posterior cranial fontanel present (vs. absent in Ariopsis, and Sciades); temporal fossa present and large (vs. absent or very reduced Ariopsis, Cathorops, Occidentarius, Genidens, and Sciades); vomerine tooth plates absent (vs. present in Ariopsis, Aspistor, Genidens, Notarius, Occidentarius, Sciades); accessory tooth plates very small (vs. large all other genera except Potamarius); maxillary barbel fleshy and cylindrical (vs. compressed in Bagre); two pairs of mental barbels (vs. one pair in Bagre); base of adipose fin moderately long, as long as anal-fin base (vs. long or very short in Amphiarius, Aspistor, Bagre, Cathorops, and Notarius); posterior cleithral process distinct from second dorsal process of cleithrum (vs. indistinct in Galeichthys); posterior cleithral process very long (vs. very short or moderately long in all other genera). Etymology. Chinchaysuyoa name of the Inca Empire territory that comprised the Ecuador and Peru, gender feminine.Published as part of Marceniuk, Alexandre Pires, Marchena, Jose, Oliveira, Claudio & Betancur-R, Ricardo, 2019, Chinchaysuyoa, a new genus of the fish family Ariidae (Siluriformes), with a redescription of Chinchaysuyoa labiata from Ecuador and a new species description from Peru, pp. 361-378 in Zootaxa 4551 (3) on pages 364-365, DOI: 10.11646/zootaxa.4551.3.5, http://zenodo.org/record/262296
Systematics, biogeography and conservation of Paragenidens grandoculis n. gen. and n. comb. (Siluriformes; Ariidae), a critically endangered species from southeastern Brazil
No full textMarceniuk, Alexandre Pires, Ingenito, Leonardo Ferreira Da Silva, Lima, Flávio César Thadeo, Gasparini, João Luiz Rosetti, Oliveira, Claudio (2019): Systematics, biogeography and conservation of Paragenidens grandoculis n. gen. and n. comb. (Siluriformes; Ariidae), a critically endangered species from southeastern Brazil. Zootaxa 4586 (3): 425-444, DOI: 10.11646/zootaxa.4586.3.
Redescription of Orthopristis ruber and Orthopristis scapularis (Haemulidae: Perciformes), with a hybridization zone off the Atlantic coast of South America
No full textMarceniuk, Alexandre Pires, Caires, Rodrigo Antunes, Machado, Leonardo, Cerqueira, Najila Nolie Catarine Dantas, Serra, Rayla Roberta M. De S., Oliveira, Claudio (2019): Redescription of Orthopristis ruber and Orthopristis scapularis (Haemulidae: Perciformes), with a hybridization zone off the Atlantic coast of South America. Zootaxa 4576 (1): 109-126, DOI: https://doi.org/10.11646/zootaxa.4576.1.
FIGURE 6 in Chinchaysuyoa, a new genus of the fish family Ariidae (Siluriformes), with a redescription of Chinchaysuyoa labiata from Ecuador and a new species description from Peru
No full textFIGURE 6. Dorsal view of the neurocranium and the nuchal plate of Chinchaysuyoa labiata, (A) paratype 113 mm SL (CAS 60621), and Chinchaysuyoa ortegai, (B) paratype 155 mm SL (MPEG 35976).Published as part of Marceniuk, Alexandre Pires, Marchena, Jose, Oliveira, Claudio & Betancur-R, Ricardo, 2019, Chinchaysuyoa, a new genus of the fish family Ariidae (Siluriformes), with a redescription of Chinchaysuyoa labiata from Ecuador and a new species description from Peru, pp. 361-378 in Zootaxa 4551 (3) on page 371, DOI: 10.11646/zootaxa.4551.3.5, http://zenodo.org/record/262296
Review of the Pareques acuminatus (Bloch & Schneider, 1801) species complex with revalidation of Pareques lineatus (Cuvier, 1830) from the Western Atlantic (Percomorphacea: Sciaenidae)
No full textCarvalho-Filho, Alfredo, Oliveira, Claudio, Maximiano, Loriane, Tavera, Jose, Acero, Arturo, Marceniuk, Alexandre Pires (2022): Review of the Pareques acuminatus (Bloch & Schneider, 1801) species complex with revalidation of Pareques lineatus (Cuvier, 1830) from the Western Atlantic (Percomorphacea: Sciaenidae). Zootaxa 5195 (5): 401-418, DOI: https://doi.org/10.11646/zootaxa.5195.5.
FIGURE 5 in Taxonomic revision of the Ophidion holbrookii Putnam, 1874 (Ophidiiformes: Ophidiidae) species complex, with description of a new species from Brazil
No full textFIGURE 5. Lateral view of Ophidion zavalai n. sp. A. Holotype, MPEG 39113, male, 271 mm SL. B. Non type, AZUSC 6917 male, 181 mm SL. C. Paratype, MPEG 39114, female, 250 mm SL. D. Non type, AZUSC 1698, female, 167 mm SL.Published as part of Rotundo, Matheus Marcos, Caires, Rodrigo Antunes, Oliveira, Claudio, Kuranaka, Mariana, Figueiredo-Filho, Jessé Miranda De & Marceniuk, Alexandre Pires, 2023, Taxonomic revision of the Ophidion holbrookii Putnam, 1874 (Ophidiiformes: Ophidiidae) species complex, with description of a new species from Brazil, pp. 237-252 in Zootaxa 5318 (2) on page 247, DOI: 10.11646/zootaxa.5318.2.4, http://zenodo.org/record/816956
FIGURE 4 in Taxonomic revision of the Ophidion holbrookii Putnam, 1874 (Ophidiiformes: Ophidiidae) species complex, with description of a new species from Brazil
No full textFIGURE 4. Sampling localities of Ophidion holbrookii (red) and Ophidion zavalai (yellow), based on material examined in the present study. Some symbols represent more than one locality or a large number of specimens.Published as part of Rotundo, Matheus Marcos, Caires, Rodrigo Antunes, Oliveira, Claudio, Kuranaka, Mariana, Figueiredo-Filho, Jessé Miranda De & Marceniuk, Alexandre Pires, 2023, Taxonomic revision of the Ophidion holbrookii Putnam, 1874 (Ophidiiformes: Ophidiidae) species complex, with description of a new species from Brazil, pp. 237-252 in Zootaxa 5318 (2) on page 246, DOI: 10.11646/zootaxa.5318.2.4, http://zenodo.org/record/816956
Chinchaysuyoa ortegai Marceniuk & Marchena & Oliveira & Betancur-R 2019, new species
No full textChinchaysuyoa ortegai new species Figure 4, 5, 6, Table 1. Hexanematichthys henni (non Fisher & Eigenmann).— Chirichigno 1963:27 (Tumbes).— Ortega & Vari 1986:13 (species list).— Ortega et al. 2012:42 (species list). Holotype: MUSM 63800, 250 mm SL, reservoir Poechos, middle Rio Chira, Catamayo basin, Peru. Paratype: ANSP 282226 (1, 229 mm SL), the same locality of the holotype; MPEG 35976 (2, 209– 300 mm SL), the same locality of the holotype; MZUSP 123828 (2, 252– 292 mm SL). the same locality of the holotype; MUSM 48796 (5, 155– 250 mm SL), the same locality of the holotype; USNM xxxx (2, 18 7 –206 mm SL), the same locality of the holotype. Diagnosis. Chinchaysuyoa ortegai differs from C. labiata by thicker granulation irregularly distributed granulation in the cephalic shield (vs. finer and homogeneously distributed in the cephalic shield, especially in the sphenotic, pterotic and parieto-supraoccipital, Figs. 5 and 6), snout truncated anteriorly (vs. pointed anteriorly, Fig. 5), distance between anterior nostrils 6.3–7.6% SL (vs. 5.1–5.9% SL, Table 1), distance between posterior nostrils 6.4–7.5% SL, rarely less than 6.4 (vs. 5.2–6.2% SL, Table 1), caudal–fin lobes relatively, rounded posteriorly (vs. relatively long, pointed posteriorly, Fig. 5). Description. Morphometric data in Table 1. Head depressed, profile elevated posteriorly, straight at frontal and parieto-supraoccipital area. Snout long and previously truncated. Anterior nostril round, with fleshy edge, posterior nostril covered by flap of skin; nostrils distant to one another and distant to orbit, not connected by fleshy furrow. Eye lateral and large; eyes distant to one another. Three pairs of relatively long teretiform barbels; maxillary barbel usually reaching or past reaching gill membrane edge, mental barbels not reaching gill membrane edge. Osseous bridge formed by lateral ethmoid and frontal relatively long and slender, little evident under skin. Cephalic shield exposed, very rough and granulated; long and large on lateral ethmoid, frontal, and supracleithral areas. Anterior portion of dorsomedial groove of neurocranium fleshy, conspicuous and continuous to level of posterior nares; posterior portion of osseous groove, deep and conspicuous, with straight margins, narrowing posteriorly. Parietosupraoccipital process funnel-shaped, long and moderately wide on posterior portion, and profile straight. Nuchal plate crescent-shaped, long and moderately wide. Mouth subterminal to terminal, moderately large; lower jaw arched. Lips relatively thick, upper lip more thick than lower lip. Vomerine tooth plates absent. One pair of oval shaped accessory tooth plates, very small and transversely elongate and narrow, distant one another, with sharp teeth. Premaxilla with sharp teeth. Dentary separated at midline, with sharp teeth. Gill membranes fused, attached to isthmus. Eighteen to twenty acicular gill rakers on first arch, 20–23 spike-shaped gill rakers on second arch. Mesial surfaces of all gill arches with developed gill rakers, lateral and mesial surfaces of first and second gill arches lacking fleshy papillae intercalated with gill rakers. Body width wider than depth in pectoral-girdle area, progressively more compressed from pectoral fin to caudal peduncle. Lateral line sloping ventrally on anterior one-third, extending posteriorly to caudal peduncle, bending abruptly onto dorsal lobe of caudal fin. Dorsal-fin spine moderately long and thick; anterior margin with granules on basal two-thirds and distal one-third with serrations; posterior margin smooth on basal half and distal half with serrations. Seven soft dorsal-fin rays. Pectoral-fin spine moderately long, shorter than dorsal-fin spine; anterior margin with granules on basal two-thirds and distal one-third with short serrations; posterior margin with granules on basal, distal half with serrations. Ten to eleven soft pectoral-fin rays. Posterior cleithral process exposed, rough and triangular shaped, very long and pointed posteriorly. Pelvic fin deep and moderately long at base, with six rays. Adipose-fin base relatively long, its base about half as long as the anal-fin base. Anal fin deep and relatively long at base, with 19–20 rays and distal margin slightly concave. Caudal peduncle relatively deep. Caudal fin forked, dorsal and ventral lobes moderately long, wide and rounded posteriorly; dorsal lobe longer than ventral lobe. Coloration. Grayish to dark brown on dorsum, silvery on flanks and white on abdomen. In alcohol, dark brown on dorsum, flanks brownish to silvery and white on venter; fins black. Maxillary barbel dark, mental barbel lighter (Figs. 4a,b, 5). Distribution and habitat. Chinchaysuyoa ortegai is described to Poechos reservoir, in the middle Rio Chira in Peru, Catamayo Basin, that born in the Andes Occidental Cordillera in Ecuador (Fig. 8). Etymology. The name of the species is in honor of Dr. Hernán Ortega Torres Teofilo the most important ichthyologist working in Peru. Remarks. Chinchaysuyoa ortegai can be differentiated from C. labiata based on its morphological characters (see Remarks on C. labiata), which is further reinforced by the disjunct geographic ranges of the two species, which are restricted to the drainage basins of Ecuador and Peru, respectively (Fig. 8), while the molecular data support the recognition of the species as distinct from the other genera of the family recorded on the Pacific coast of the Americas (Fig. 1).Published as part of Marceniuk, Alexandre Pires, Marchena, Jose, Oliveira, Claudio & Betancur-R, Ricardo, 2019, Chinchaysuyoa, a new genus of the fish family Ariidae (Siluriformes), with a redescription of Chinchaysuyoa labiata from Ecuador and a new species description from Peru, pp. 361-378 in Zootaxa 4551 (3) on pages 368-372, DOI: 10.11646/zootaxa.4551.3.5, http://zenodo.org/record/262296
Taxonomic revision of the Ophidion holbrookii Putnam, 1874 (Ophidiiformes: Ophidiidae) species complex, with description of a new species from Brazil
No full textRotundo, Matheus Marcos, Caires, Rodrigo Antunes, Oliveira, Claudio, Kuranaka, Mariana, Figueiredo-Filho, Jessé Miranda De, Marceniuk, Alexandre Pires (2023): Taxonomic revision of the Ophidion holbrookii Putnam, 1874 (Ophidiiformes: Ophidiidae) species complex, with description of a new species from Brazil. Zootaxa 5318 (2): 237-252, DOI: 10.11646/zootaxa.5318.2.4, URL: http://dx.doi.org/10.11646/zootaxa.5318.2.
FIGURE 2 in Systematics, biogeography and conservation of Paragenidens grandoculis n. gen. and n. comb. (Siluriformes; Ariidae), a critically endangered species from southeastern Brazil
No full textFIGURE 2. Body and head in lateral and dorsal view of all Paragenidens gradoculis specimens in zoological collections. (A). NMW 48272, rio Doce, Espírito Santo state. (B). MCZ 7681 (Museum of Comparative Zoology, Harvard University), rio Doce, Espírito Santo state, scale 50 mm. (C). MZUSP 2295, lagoa Feia, Rio de Janeiro, 251 mm SL. (D). MZUSP 79459, 247 mm SL, rio Doce, Espírito Santo. (E). MZUSP 10104–14, 170 mm SL, lagoa Juparanã, Espírito Santo state. (F). LBP 24068, 240 mm SL, lagoa Nova, Espírito Santo state.Published as part of Marceniuk, Alexandre Pires, Ingenito, Leonardo Ferreira Da Silva, Lima, Flávio César Thadeo, Gasparini, João Luiz Rosetti & Oliveira, Claudio, 2019, Systematics, biogeography and conservation of Paragenidens grandoculis n. gen. and n. comb. (Siluriformes; Ariidae), a critically endangered species from southeastern Brazil, pp. 425-444 in Zootaxa 4586 (3) on page 432, DOI: 10.11646/zootaxa.4586.3.2, http://zenodo.org/record/264720
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