scholarly journals Two new species of Hyphessobrycon (Teleostei: Characidae) from upper rio Tapajós basin on Chapada dos Parecis, central Brazil

2006 ◽  
Vol 4 (3) ◽  
pp. 301-308 ◽  
Author(s):  
Tiago Pinto Carvalho ◽  
Vinicius Araújo Bertaco
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Caudal Fin ◽  
Mato Grosso ◽  
Central Brazil ◽  
Dorsal Fin ◽  
Two New Species ◽  
Fin Rays ◽  
Black Band

Two new species of Hyphessobrycon are described from the upper rio Tapajós basin, Mato Grosso, Brazil. Hyphessobrycon melanostichos is distinguished from its congeners by the combination of a conspicuous longitudinal broad black band beginning on the posterior margin of orbit and reaching the tip of middle caudal fin rays, a distinct vertically elongate humeral spot, and 16 to 18 branched anal-fin rays. Hyphessobrycon notidanos is distinguished from its congeners by the combination of an elongate dorsal fin in mature males, a vertically elongate humeral spot, 2-4 maxillary teeth, iii,8 dorsal-fin rays, and 16 to 21 branched anal-fin rays.

Hyphessobrycon petricolus, a new species of tetra (Characiformes: Characidae) from the rio Madeira basin, Mato Grosso, Brazil

Zootaxa ◽  
2017 ◽  
Vol 4221 (2) ◽  
pp. 242 ◽  
Author(s):  
WILLIAN M. OHARA ◽  
FLÁVIO C. T. LIMA ◽  
BRUNO S. BARROS
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Unique Combination ◽  
Caudal Fin ◽  
Mato Grosso ◽  
Fin Rays ◽  
A New Species ◽  
Rio Madeira

A new species of Hyphessobrycon is described from the rio Roosevelt, rio Madeira basin, Mato Grosso State, Brazil. Hyphessobrycon petricolus sp. n. can be distinguished from its congeners by the unique combination of the following features: a well-defined, relatively narrow dark midlateral stripe on body extending from immediately behind posterior margin of opercle to the middle caudal-fin rays, relatively conspicuous humeral blotch, and 16–20 branched anal-fin rays. Comments on the remaining Hyphessobrycon species presenting a conspicuous dark midlateral stripe are presented. 

scholarly journals A new species of Hyphessobrycon Durbin(Characiformes: Characidae) from the rio Juruena basin, Central Brazil, with notes on H. loweae Costa & Géry

2013 ◽  
Vol 11 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Leonardo F. S. Ingenito ◽  
Flavio C. T. Lima ◽  
Paulo A. Buckup
Keyword(s):  
New Species ◽  
First Record ◽  
Adult Males ◽  
Horizontal Scale ◽  
Mato Grosso ◽  
Central Brazil ◽  
Dorsal Fin ◽  
Fin Rays ◽  
A New Species ◽  
Red Coloration

A new species of Hyphessobrycon, H. peugeoti, is described from the middle portions of the rio Juruena drainage, upper rio Tapajós basin, Mato Grosso State, Brazil. It can be distinguished from all congeners, with the exception of H. loweae and H. heliacus, by a filamentous elongation of the dorsal fin and the approximately straight margin of the anal fin in adult males. It can be distinguished from both H. loweae and H. heliacus by an overall red coloration in life (vs. a golden coloration in life in the latter). Additionally, it can be distinguished from H. heliacus by the lack of chevron-like dark markings along the midline (vs. presence of chevron-like dark-markings in H. heliacus), and from H. loweae by the presence of only five horizontal scale rows between the dorsal-fin origin and the lateral line (vs. 6-7 in H. loweae), and the higher number of branched anal-fin rays (21-24, modally 22, vs. 17-21, modally 20, in H. loweae). Additional meristic, morphometric, and distributional data are provided for Hyphessobrycon loweae, including its first record in the rio Araguaia/Tocantins basin. Comments on a putative monophyletic group including H. peugeoti, H. loweae, H. heliacus, H. elachys, and H. moniliger are presented.

Description of two new species of sandlances, genus Bleekeria (Perciformes, Ammodytidae) from the Andaman Sea (northeastern Indian Ocean)

Zootaxa ◽  
2021 ◽  
Vol 4903 (3) ◽  
pp. 419-429
Author(s):  
PETER N. PSOMADAKIS ◽  
TATSUKI YOSHINAGA ◽  
ZI ZA WAH ◽  
HITOSHI IDA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Andaman Sea ◽  
Coi Gene ◽  
Meristic Characters ◽  
Caudal Fin ◽  
Single Row ◽  
Dorsal Fin ◽  
Two New Species ◽  
Fin Rays

Two new species of Bleekeria Günther, 1862 are described from specimens collected in the Andaman Sea off the coast of Myanmar during bottom surveys conducted by the R/V Dr Fridtjof Nansen in 2015 and 2018. They are distinguished from each other and from congeners by a combination of morphological and meristic characters as well as fin coloration and genetic variance. Bleekeria albicauda sp. nov. has pelvic fins, 40–41 dorsal-fin rays, 54–55 total vertebrae, no teeth in jaws, 4 scale rows between dorsal-fin origin and lateral line, a single row of about 10 scales on mid-upper part of opercle, scales on central part of body clearly shorter than their height, caudal fin with white upper and lower lobes when fresh (unique within the genus). Bleekeria nigrilinea sp. nov. has no pelvic fins, 37–39 dorsal-fin rays, 49–50 total vertebrae, 2½ scale rows between dorsal-fin origin and lateral line (the smallest count within the genus with B. estuaria of Mozambique brackish water), 5–6 scales on mid-upper part of opercle arranged in a single row, scales on central part of body clearly longer than their height, upper and lower margins of caudal fin black when fresh (unique within the genus). The COI gene sequences of the two new species showed clear genetic divergence (pairwise K2P, >10 %) from Bleekeria estuaria Randall & Ida, 2014 and Bleekeria mitsukurii (Jordan & Evermann, 1902). A key to the species of Bleekeria is provided. 

scholarly journals Two new species of Microglanis (Siluriformes: Pseudopimelodidae) from the upper-middle rio Araguaia basin, Central Brazil

2011 ◽  
Vol 9 (4) ◽  
pp. 697-707 ◽  
Author(s):  
William Benedito Gotto Ruiz ◽  
Oscar Akio Shibatta
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Amazon Basin ◽  
Color Pattern ◽  
Body Color ◽  
Gill Rakers ◽  
Mato Grosso ◽  
Central Brazil ◽  
Two New Species ◽  
Fin Rays

Two new species of Microglanis are described from tributaries of upper-middle rio Araguaia, States of Mato Grosso and Goiás, Brazil. Microglanis oliveirai differs from its congeners by the short supraoccipital process not reaching the small anterior nuchal plate, and reduced number of gill rakers, lateral line pores, ribs, vertebrae, and caudal-fin rays. Microglanis xylographicus differs from its congeners by the presence of melanophores surrounding the neuromasts of the superficial lines, snout length 11.4-12.9% SL and body color pattern consisting of horizontal brown stripes similar to a wooden bark pattern. An identification key of Microglanis species from the Amazon basin is presented.

scholarly journals Hemigrammus ataktos: a new species from the rio Tocantins basin, central Brazil (Characiformes: Characidae)

2014 ◽  
Vol 12 (2) ◽  
pp. 257-264 ◽  
Author(s):  
Manoela M. F. Marinho ◽  
Fernando C. P. Dagosta ◽  
José L. O. Birindelli
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Posterior Margin ◽  
The Body ◽  
Caudal Fin ◽  
Central Brazil ◽  
Fin Rays ◽  
Complete Series ◽  
A New Species

A new species of Hemigrammus is described from the middle rio Tocantins basin, central Brazil. The new species can be distinguished from all congeners by having a black midlateral stripe on the body extending from the posterior margin of the eye to the median caudal-fin rays. Mature males possess dorsal-, pelvic-, and anal-fin rays elongate, features that also help to recognize the new species. Although the new species is described in Hemigrammus, some specimens present a complete series of pored scales in the lateral line. A discussion about the generic allocation of the new species is presented.

scholarly journals A New Species of the Genus Garra Hamilton, 1822 from the Chindwin Basin of Manipur, India (Teleostei: Cyprinidae: Labeoninae)

ISRN Zoology ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Bungdon Shangningam ◽  
Waikhom Vishwanath
Keyword(s):  
New Species ◽  
River Basin ◽  
Posterior Margin ◽  
Cyprinid Fish ◽  
Unique Combination ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Abdominal Region ◽  
Black Band ◽  
A New Species

Garra namyaensis sp. nov., a new cyprinid fish, is described from the Chindwin River basin in Manipur, India. It is distinguished from its congeners in having a unique combination of the following characters: smoothly rounded snout tip with a prominent rostral lobe, chest and abdominal region with scales, dorsal fin with a black band near the posterior margin, and caudal fin with a distinct W-shaped black band.

Gephyrocharax machadoi, a new species of Stevardiinae (Characiformes: Characidae) from the Rio Paraguai basin, central Brazil

Zootaxa ◽  
2018 ◽  
Vol 4415 (1) ◽  
pp. 161
Author(s):  
KATIANE M. FERREIRA ◽  
ÉRIKA DE FARIA ◽  
ALEXANDRE C. RIBEIRO ◽  
JÚLIO C. O. SANTANA ◽  
IRANI QUAGIO-GRASSIOTO ◽  
...  
Keyword(s):  
New Species ◽  
Sexually Dimorphic ◽  
Body Depth ◽  
Caudal Fin ◽  
Mato Grosso ◽  
Central Brazil ◽  
Fin Rays ◽  
A New Species

Gephyrocharax machadoi, new species, is described from tributaries of the rio Sepotuba, upper rio Paraguai basin, Mato Grosso state, Brazil. The new species is distinguished from its congeners, except Gephyrocharax major, by presenting two modified scales on the ventral caudal-fin lobe (pouch scales): a larger, sexually dimorphic scale, slightly superior and anterior in position, followed by a smaller, posterior and ventrally placed accessory scale (vs. a single modified pouch scale without ventrally placed accessory scales). Gephyrocharax machadoi differs from G. major by presenting a gap (more conspicuous in mature males than in mature females) between the second and third ventral procurrent caudal-fin rays (vs. second and third ventral procurrent caudal-fin rays near each other or fused distally); premaxilla with tricuspid teeth (vs. tetra- to pentacuspid teeth); and body depth 21.5–25.4% of SL (vs. 25.9–36.8% in SL). Spermiogenesis and spermatozoa morphology are also described. 

Two new species of Hetereleotris (Perciformes: Gobiidae) from the Red Sea

Zootaxa ◽  
2019 ◽  
Vol 4608 (3) ◽  
pp. 501
Author(s):  
MARCELO KOVAČIĆ ◽  
SERGEY V. BOGORODSKY ◽  
AHMAD O. MAL
Keyword(s):  
New Species ◽  
Red Sea ◽  
Gulf Of Aqaba ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Two New Species ◽  
Fin Rays ◽  
Brown Band ◽  
Pectoral Fin Rays

Two new species of the gobiid genus Hetereleotris, H. aurantiaca sp. nov. and H. semisquamata sp. nov., are described from the Red Sea, the former from Saudi Arabia at Jeddah from the cave at depth of 14–16 m, and the latter from the southern Egypt from reef flat. Hetereleotris aurantiaca sp. nov. is distinguished from its congeners by having dorsal-fin rays VI + I,10; anal-fin rays I,9; pectoral-fin rays 14, all rays branched; pelvic-fin rays I,5, the fin separated and without frenum, 5th ray unbranched; anterior nostril with a long tube without process from the rim, posterior nostril a pore with erected rim; no tentacle above eye; posterior angle of jaws extending posteriorly to below posterior edge of pupil; no opercular spine; no mental frenum; pelvic fins longer than pectoral fins; squamation reduced to a few scales on caudal peduncle at caudal-fin base; no head canals; by presence, size and pattern of suborbital rows of sensory papillae; and orange head and yellowish orange body with five faint brown bars. Hetereleotris semisquamata sp. nov. is distinctive among its congeners by unique scale pattern (scales cycloid, the squamation reduced, tapering from caudal-fin base along lateral midline towards pectoral fin where nearly reaching its base) and by coloration (head and body whitish, with brown line from eye to end of upper lip, dark brown band across interorbital area and continuing obliquely from eye to corner of opercle, broad dark brown band below first dorsal fin continuing into fin, and moderately broad dark brown bar on caudal-fin base). Furthermore, it is characterized in having dorsal-fin rays VI + I,11, anal-fin rays I,10, pectoral-fin rays 16, and absence of head canals. In addition to descriptions of two species, a key to all species of Hetereleotris is provided. Hetereleotris psammophila is reported outside the Gulf of Aqaba for the first time. 

scholarly journals Seven new species of the killifish genus Rivulus (Cyprinodontiformes: Rivulidae) from the Paraná, Paraguay and upperAraguaia river basins, central Brazil

2005 ◽  
Vol 3 (1) ◽  
pp. 69-82 ◽  
Author(s):  
Wilson J. E. M. Costa
Keyword(s):  
New Species ◽  
Color Pattern ◽  
Color Patterns ◽  
Caudal Fin ◽  
Mato Grosso ◽  
Central Brazil ◽  
Unique Color ◽  
Fin Rays ◽  
Paraná Basin ◽  
Parana Basin

Seven new species of the Rivulus punctatus group collected during recent field studies in central Brazil are described. Rivulus dapazi n. sp., from the upper rio Correntes drainage, rio Paraguay basin, is diagnosed by a unique color pattern of the anal and caudal fins in males; R. cyanopterus n. sp., from the upper rio São Lourenço drainage, rio Paraguay basin, is diagnosed by a unique color pattern of the anal fin in both sexes; R. rossoi n. sp., from the rio Inhanduí drainage, rio Paraná basin, is diagnosed by a unique color pattern of the caudal fin in males and a reduced number of gill rakers on the first branchial arch; R. litteratus n. sp., from the upper rio Araguaia basin, is diagnosed by unique color patterns of flank in males and caudal fin in females; R. rutilicaudus n. sp., from the rio Verde drainage in Goiás, rio Paraná basin, is diagnosed by a unique color pattern of the caudal fin in females; R. scalaris n. sp., from the rio Sucuruí, rio Aporé, rio Correntes and rio Taquari drainages, rio Paraná basin, is diagnosed by a unique color pattern of the flank in males; and, R. egens n. sp., from the upper rio Verde drainage in Mato Grosso do Sul, rio Paraná basin, is distinguished by a combination of frontal E-scale pattern and the absence of red marks on the caudal fin in males. Combinations of other color patterns and morphological features, including number of scales of the longitudinal series, number of dorsal, anal, caudal and pectoral fin-rays, relative position of dorsal-fin origin and anal-fin rays, and number of vertebrae, are also useful in identification of the new species, but phylogenetic relationships among them are unknown at the present. A key to identification of species of Rivulus from the rio Paraná-Paraguay basin and adjacent headstreams is provided.

scholarly journals Gobiesox lanceolatus, a new species of clingfish (Teleostei:  Gobiesocidae) from Los Frailes submarine canyon, Gulf of California, Mexico

Zootaxa ◽  
2017 ◽  
Vol 4221 (3) ◽  
pp. 393 ◽  
Author(s):  
PHILIP A. HASTINGS ◽  
KEVIN W. CONWAY
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Gulf Of California ◽  
Baja California ◽  
Submarine Canyon ◽  
Single Specimen ◽  
Dorsal Fin ◽  
Fin Rays ◽  
A New Species ◽  
Pectoral Fin Rays

Gobiesox lanceolatus is described from a single specimen collected from 300 meters depth in the Los Frailes submarine canyon in the southwestern Gulf of California. The "Canyon Clingfish" is unique within Gobiesox in having a lanceolate caudal fin, with the central rays longer than those above and below them. It is also distinguished by 14 dorsal-fin rays (first tiny and unsegmented), 11 anal-fin rays, 28 pectoral-fin rays, anus slightly closer to anal-fin origin than to posterior margin of pelvic disc, and dorsal-fin origin in front of vertical from anus. It is most similar to Gobiesox eugrammus, known from Isla Guadelupe, the coast of outer Baja California and southern California. This is the deepest record for a species of Gobiesox and only four other species of clingfishes are known from greater depths. 

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