A new species of Bryconops Kner (Characiformes: Iguanodectidae) from the Rio Maicuru, lower Amazon basin, Brazil

Zootaxa ◽  
2018 ◽  
Vol 4514 (3) ◽  
pp. 372 ◽  
Author(s):  
CÁRLISON SILVA-OLIVEIRA ◽  
FLÁVIO C. T. LIMA ◽  
JUAN D. BOGOTÁ-GREGORY
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Distal Margin ◽  
Middle Portion ◽  
Black Stripe ◽  
The Third ◽  
Dorsal Fin ◽  
Left Margin ◽  
Dark Patch ◽  
A New Species

A new species of Bryconops is described from the rio Maicuru, a tributary of the left margin of the lower Amazon River, Pará, Brazil. Bryconops chernoffi new species, differs from all its congeners by the presence of an elongated dark patch of pigmentation immediately after the posterodorsal margin of the opercle, running vertically from the supracleithrum to the distal margin of the cleithrum (vs. absence of a similar blotch), and by a dark dorsal fin with a narrow hyaline band at middle portion of dorsal-fin rays (vs. dorsal fin hyaline or with few scattered chromatophores). It differs further from all its congeners, except B. colanegra, by the presence of a blurred black stripe at the anal fin base. It differs from B. colanegra by possessing fewer predorsal scales (8–9 vs. 10–11) and in that the third infraorbital contacts the preopercle ventrally (vs. third infraorbital not contacting preopercle ventrally). The new species is assigned to the subgenus Creatochanes by the number of maxillary teeth, and ossification and denticulation of the gill rakers. 

Pethia poiensis, a new species of cyprinid fish from the Chindwin Basin of Manipur, India

Zootaxa ◽  
2018 ◽  
Vol 4379 (4) ◽  
pp. 585
Author(s):  
BUNGDON SHANGNINGAM ◽  
WAIKHOM VISHWANATH
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Cyprinid Fish ◽  
Colour Pattern ◽  
Black Stripe ◽  
The Third ◽  
Dorsal Fin ◽  
Cyprinid Species ◽  
A New Species ◽  
Pelvic Fin

Pethia poiensis, a new cyprinid species, is described from the Challou River, Chindwin Basin, Manipur, India. The new species is characterised by an incomplete lateral line with 7–9 pored scales, the absence of barbels, 19–20 scales in lateral series, 9–10 pre-dorsal scales, 18 pre-anal scales, 3½ scales between dorsal-fin origin and lateral line, three scales between lateral line and pelvic-fin origin and a unique colour pattern consisting of a humeral spot encompassing the third and fourth lateral-line scales, a caudal spot on the 16th and 17th lateral series scales and a black stripe along the flank. A revised key to the species of Pethia found in the Chindwin-Irrawaddy drainage is presented. 

scholarly journals A new species of Anchoviella Fowler, 1911 (Clupeiformes: Engraulidae) from the Amazon basin, Brazil

2012 ◽  
Vol 10 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Marina V. Loeb
Keyword(s):  
New Species ◽  
Standard Length ◽  
Posterior Margin ◽  
Amazon Basin ◽  
Head Length ◽  
Estuarine Species ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Upper Jaw ◽  
A New Species

Anchoviella juruasanga is described from the drainages of rios Negro, Madeira, Tapajós, Trombetas, Tocantins, and Jari, in the Amazon basin, Brazil. The new species is distinguished from its congeners by having a short upper jaw, with its posterior tip extending between the verticals through anterior and posterior margins of the pupil (vs. posterior tip of upper jaw extending beyond the vertical through posterior margin of the pupil). Anchoviella juruasanga is also distinct from other strictly freshwater Amazonian species of the genus by the distance from tip of snout to posterior end of upper jaw between 8 and 11% in standard length (vs. 14% or more in A. alleni, A. carrikeri, A. guianensis, and A. jamesi). The anal-fin origin slightly posterior to or at the vertical through the base of the last dorsal-fin ray further distinguishes the new species from A. alleni (anal-fin origin posterior to the vertical through the last anal-fin ray by at least 14% of head length) and A. jamesi (anal-fin origin anterior to the vertical through the last anal-fin ray). An identification key for the Amazonian species of Anchoviella, including marine and estuarine species known to occur in the lower portion of the basin, is presented.

scholarly journals A new species of Boehlkea (Characiformes: Characidae: Stevardiinae) from the rio Japurá, Amazon basin, Brazil

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Isabel M. Soares ◽  
Vinicius A. Bertaco ◽  
Priscila Madoka M. Ito ◽  
Jansen Zuanon
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Amazon Basin ◽  
Color Pattern ◽  
Distal Portion ◽  
Lower Number ◽  
Dorsal Fin ◽  
Basal Half ◽  
A New Species ◽  
Pelvic Fin

ABSTRACT A new species of Boehlkea is described from rio Japurá, Amazon basin. The new species differs from B. fredcochui by the presence of a vertically elongate humeral spot (vs. absence), complete lateral line (vs. incomplete), four rows of scales below lateral line (vs. three), and lower number of branched anal-fin rays (17-21 vs. 22-25), and from B. orcesi by the higher number of maxillary teeth (13-14 vs. 5-12), greater head length (27.9-29.9% vs. 24.3-27.5% of SL), and by the color pattern (basal half of dorsal-fin, distal portion of pelvic-fin, lower caudal-fin lobe and anal-fin with black chromatophores vs. absence of black chromatophores in the fins).

Two new species of the genus Chelidoperca (Perciformes: Serranidae) from the Andaman Sea, eastern Indian Ocean

Zootaxa ◽  
2021 ◽  
Vol 4927 (1) ◽  
pp. 87-103
Author(s):  
PETER N. PSOMADAKIS ◽  
OFER GON ◽  
THAUNG HTUT
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Ventral Surface ◽  
Andaman Sea ◽  
Distal Margin ◽  
Black Stripe ◽  
Dorsal Fin ◽  
Proximal Half ◽  
Lower Jaw ◽  
Two New Species

Two new species of the genus Chelidoperca are described from specimens collected in 2015 and 2018 from the Andaman Sea, off the coast of Myanmar during trawl bottom surveys conducted by the R/V Dr. Fridtjof Nansen. Chelidoperca myathantuni sp. nov. is described based on 15 specimens (74.3–129.5 mm SL) from 101–185 m depth, which can be distinguished from all congeners by the following combination of characters: 3 (2 full-sized plus 1 half-sized) scale rows between lateral line and middle of spinous dorsal-fin base; 42–44 (modally 44) pored lateral-line scales; 16 pectoral-fin rays; interorbital scales extending to mid-orbit level; scales on ventral surface of lower jaw restricted to the angular (not extending onto the dentary); enlarged caniniform teeth on the upper jaw; side of body with longitudinal dashed black stripe; dorsal fin pale yellow with reddish pigment mostly restricted at base of spines and rays. Chelidoperca flavimacula sp. nov. is described based on eight specimens (49.7–70.7 mm SL) from 84–131 m depth, which can be distinguished from all congeners by the following combination of characters: 3 (2 full-sized plus 1 half-sized) scale rows between lateral line and middle of spinous dorsal-fin base; 42–45 (modally 42) pored lateral-line scales; 9–10 (modally 10) scale rows below the lateral line; 6 predorsal scales; 16–17 (modally 16) circumpeduncular scales; 5 scales rows on cheek; interorbital scales extending to mid-orbit level; anal fin with yellowish distal margin and three or four rows of bright yellow spots over its proximal half. 

A new species of Moenkhausia Eigenmann, 1903 (Characiformes: Characidae) from Amazon basin, Brazil

Zootaxa ◽  
2016 ◽  
Vol 4208 (4) ◽  
pp. 392 ◽  
Author(s):  
ISABEL MATOS SOARES ◽  
CRISTINA MOTTA BÜHRNHEIM
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Amazon Basin ◽  
Middle Portion ◽  
Horizontal Stripe ◽  
Dark Stripe ◽  
A New Species

A new species of Moenkhausia is described from tributaries of the lower Amazon basin, Pará State, Brazil. The new species is morphologically similar to Moenkhausia collettii, M. copei, and M. venerei by the presence of a dark horizontal stripe across the middle portion of the eye, a conspicuous slightly rounded humeral blotch, a dark longitudinal midlateral stripe and a dark stripe along the anal-fin base. However, the new species can be distinguished from M. collettii, M. copei, and M. venerei mainly by the number of cusps on the inner row of the premaxillary, maxillary and dentary teeth, and by the number of scales in transversal series above and below the lateral line. 

scholarly journals Trichomycterus anhanga, a new species of miniature catfish related to T. hasemani and T. johnsoni (Siluriformes: Trichomycteridae) from the Amazon basin, Brazil

2012 ◽  
Vol 10 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Guilherme M. Dutra ◽  
Wolmar B. Wosiacki ◽  
Mario C. C. de Pinna
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Sensory System ◽  
Ventral Surface ◽  
Dark Spot ◽  
Single Pair ◽  
Mandibular Symphysis ◽  
Dorsal Fin ◽  
Northern Brazil ◽  
A New Species

Trichomycterus anhanga is described from the Amazon basin, northern Brazil. The species is diagnosed by the latero-sensory system which is restricted to LL1 and LL2, the pectoral fin with two branched rays, the absence of pelvic fins and girdle, the reduced jaws and pharyngeal dentition, the presence of six to seven interopercular odontodes, the absence of a lateral series of spots, the presence of a small dark spot on the ventral surface of the mandibular symphysis, the narrow comma-shaped palatine, the absence of procurrent rays anterior to the dorsal and anal fins, the position of insertion of the first dorsal-fin pterygiophore and the presence of a single pair of pleural ribs. Trichomycterus anhanga shares with T. hasemani and T. johnsoni a wide cranial fontanel which occupies most of the skull roof. Miniaturization as well as synapomorphies for the T. hasemani group are discussed.

scholarly journals A new species of Brethesiamyia Maia (Diptera: Cecidomyiidae) from Colombia with description of immature forms

2020 ◽  
Vol 60 ◽  
pp. e20206066
Author(s):  
Esau Adenawer Ospina-Peñuela ◽  
Carlos José Einicker Lamas ◽  
Francisco Serna ◽  
Maria Virginia Urso-Guimarães
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Larval Instar ◽  
First Record ◽  
The Third ◽  
The Andes ◽  
Female Pupa ◽  
A New Species

A new species of Brethesiamyia (Diptera: Cecidomyiidae) is described from Colombia, which represents the first record of the genus for the country. We described the species based on male, female, pupa, larva of third instar and gall morphology, which the larva induces on leaves of Myrcia sp. (Myrtaceae) from the foothills situated at the connection of the Andes and the Amazon basin from Colombia. The first description of the third larval instar is provided for the genus.

Apistogramma eremnopyge, a new species of cichlid fish (Teleostei: Cichlidae) from Peru

Zootaxa ◽  
2004 ◽  
Vol 564 (1) ◽  
pp. 1 ◽  
Author(s):  
JONATHAN S. READY ◽  
SVEN O. KULLANDER
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Cichlid Fish ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
A New Species

Apistogramma eremnopyge, new species, is described from the R o Pintuyacu, R o Itaya drainage (Amazon basin) in Peru. Apistogramma eremnopyge is unique in the genus in possessing a dark blotch on the lower caudal peduncle. It is otherwise most similar to A. bitaeniata, with males possessing extended dorsal fin lappets, and prolonged rays dorsally and ventrally in the caudal fin.

scholarly journals Corydoras ortegai, a new species of corydoradine catfish from the lower río Putumayo in Peru (Ostariophysi: Siluriformes: Callichthyidae)

2007 ◽  
Vol 5 (3) ◽  
pp. 293-300 ◽  
Author(s):  
Marcelo R. Britto ◽  
Flávio C. T. Lima ◽  
Max H. Hidalgo
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Distribution Patterns ◽  
Sister Species ◽  
Similar Distribution ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Lateral Body ◽  
Adipose Fin ◽  
A New Species

A new species of Corydoras, C. ortegai, is described from tributaries of the lower course of río Putumayo in Peru, close to the border with Brazil and Colombia. The new species seems to be related to Corydoras reynoldsi, C. weitzmani, C. panda, and C. tukano, all of which share a pattern composed of uniform light ground color on body, dark bar ("mask") across orbit, and one or two large rounded blotches midlaterally on trunk. Corydoras ortegai is easily distinguished from these species, except C. panda, mainly by the absence of a midlateral trunk blotch at the dorsal-fin level, and the rounded shape of the midlateral trunk blotch at the adipose-fin level. Corydoras ortegai differs from C. panda by its greater number of lateral body plates, lack of dorsal-fin blotch, scattered chromatophores surrounding midregion of cleithrum, caudal fin with series of small blotches restricted to rays, slenderer body, and narrower intercleithral area. Corydoras ortegai belongs to a putatively monophyletic assemblage of Corydoras that occurs mainly in the Western Amazon basin, C. tukano excepted. The occurrence of Corydoras tukano in the rio Tiquié (upper Negro basin) and its putative sister species, C. ortegai, in the western Amazon, together with similar distribution patterns shared by other groups of fishes, suggest a biogeographic relationship between these areas.

scholarly journals A new species of the armored catfish Parotocinclus (Loricariidae: Hypoptopomatinae), from the Amazon basin in Colombia

2015 ◽  
Vol 13 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Pablo Lehmann A. ◽  
Lucas J. Schvambach ◽  
Roberto E. Reis
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Pupil Diameter ◽  
Ventral Surface ◽  
Anterior Portion ◽  
Pigmentation Pattern ◽  
Dorsal Fin ◽  
Triangular Patch ◽  
Dark Pigmentation ◽  
A New Species

A new species of hypoptopomatine cascudinho is described from a creek tributary to the Amazon River in Leticia, Amazonas Departament, Colombia. The new species of Parotocinclus is distinguished from congeners from northeastern to southeastern Brazilian rivers in having the cheek canal plate elongated posteriorly on the ventral surface of head and contacting the cleithrum. It is diagnosed from P. collinsae (Essequibo River basin, Guiana) and P. halbothi (rio Trombetas basin, Brazil and Marowijne River, Suriname), by having a triangular patch of dark pigmentation on the anterior portion of the dorsal-fin membrane, by the absence of unicuspid accessory teeth on both the premaxilla and dentary, and by having a Y-shaped light mark on the snout. The new species of Parotocinclus is distinguished from all remaining congeners by having a pigmentation pattern consisting of conspicuous dark dots smaller than a pupil diameter, broadly distributed dorsally and ventrally.

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