A new distinctively banded species of Pseudolithoxus (Siluriformes: Loricariidae) from the upper Orinoco River

Zootaxa ◽  
2011 ◽  
Vol 2941 (1) ◽  
pp. 38 ◽  
Author(s):  
NATHAN K. LUJAN ◽  
JOSE L. O. BIRINDELLI
Keyword(s):  
New Species ◽  
Type Material ◽  
Caudal Fin ◽  
Orinoco River ◽  
Light Yellow ◽  
Black Spots ◽  
White Spots ◽  
Amazonas State ◽  
A New Species ◽  
Fish Distributions

Pseudolithoxus kelsorum is described as a new species based on type material from the upper Orinoco in Amazonas State, Venezuela. Pseudolithoxus kelsorum is diagnosed from all other Pseudolithoxus by having dark brown to black base color with eight to 11 (usually nine) light yellow vertical or oblique transversal bands between orbits and caudal fin, bands wide and rarely but sometimes incomplete or contorted as swirls (vs. dark brown to black base color with 18 or more thin, light yellow, frequently contorted transversal bands between orbits and caudal fin in P. tigris; black base color with small white spots in P. anthrax and P. nicoi; and light brown base color with dark brown to black spots in P. dumus). Distributions of P. kelsorum and other Ancistrini taxa support the presence of a zoogeographic filter limiting fish distributions across a reach of the Orinoco River between the Ventuari-Orinoco confluence and the Maipures rapids.

Betta nuluhon, a new species of fighting fish from western Sabah, Malaysia (Teleostei: Osphronemidae)

Zootaxa ◽  
2020 ◽  
Vol 4819 (1) ◽  
pp. 187-194
Author(s):  
N. S. S. KAMAL ◽  
H. H. TAN ◽  
CASEY K. C. NG
Keyword(s):  
New Species ◽  
Slender Body ◽  
Stream Habitat ◽  
Body Depth ◽  
Caudal Fin ◽  
Black Spots ◽  
Greenish Blue ◽  
Mature Fish ◽  
A New Species ◽  
Yellow Iris

Betta nuluhon, new species, is described from a hill stream habitat in western Sabah. This species is allied to both B. chini and B. balunga, and differs from rest of its congeners in the B. akarensis group in having the following combination of characters: yellow iris when live; mature males with greenish-blue iridescence on opercle when live; mature fish with distinct transverse bars on caudal fin; slender body (body depth 22.1–25.2 % SL); belly area with faint reticulate pattern (scales posteriorly rimmed with black); absence of tiny black spots on anal fin; lateral scales 29–31 (mode 30); predorsal scales 20–21 (mode 20). Notes on a fresh series of B. chini are also provided.

A new species of Pimelodella Eigenmann & Eigenmann, 1888 (Siluriformes: Heptapteridae) from the Orinoco River basin

Zootaxa ◽  
2020 ◽  
Vol 4808 (3) ◽  
pp. 491-506
Author(s):  
MIGUEL ÁNGEL CORTÉS-HERNÁNDEZ ◽  
CARLOS DONASCIMIENTO ◽  
HERNANDO RAMÍREZ-GIL
Keyword(s):  
New Species ◽  
River Basin ◽  
Taxonomic Status ◽  
Dorsal Lobe ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Orinoco River ◽  
Dorsal Fin ◽  
Adipose Fin ◽  
A New Species

A new species of Pimelodella is described from western Andean tributaries of the Orinoco River basin. The new species differs from all congeners by a unique set of characters that includes long maxillary barbel, surpassing the dorsal lobe of the caudal fin; relatively short adipose fin (32.8–36.4 of SL); 40–42 total vertebrae; posterior margin of pectoral-fin spine with 12–18 retrorse dentations along basal two thirds; laterosensory canal foramina of dentary and preopercle large and externally conspicuous; a brown faint and narrow midlateral stripe extending from the pseudotympanum, fading posteriorly along the caudal peduncle, and ending as a spot at the caudal-fin base; and dorsal-fin base darkly pigmented, from spinelet to posteriormost interradial membrane. Taxonomic status of P. pallida and presence of P. cruxenti in Colombia are also discussed. 

scholarly journals Description of a new species of Microglanis (Siluriformes: Pseudopimelodidae) from the Amazon basin, Amazonas State, Brazil

2013 ◽  
Vol 11 (3) ◽  
pp. 507-512 ◽  
Author(s):  
Lucas Ribeiro Jarduli ◽  
Oscar Akio Shibatta
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Color Pattern ◽  
Caudal Fin ◽  
Amazonas State ◽  
A New Species

The first species of Microglanis from the rio Amazonas, Amazonas State, Brazil is described. This species differs from all congeners by the forked caudal fin, and color pattern of the supraoccipital region consisting of two elliptical and juxtaposed pale spots, besides a combination of morphometrics characters.

scholarly journals Harttia merevari, a new species of catfish (Siluriformes: Loricariidae) from Venezuela

2005 ◽  
Vol 3 (4) ◽  
pp. 519-524 ◽  
Author(s):  
Francisco Provenzano R. ◽  
Antonio Machado-Allison ◽  
Barry Chernoff ◽  
Phil Willink ◽  
Paulo Petry
Keyword(s):  
New Species ◽  
River Basin ◽  
Central Area ◽  
Dorsal Surface ◽  
The Body ◽  
Anterior Portion ◽  
Orinoco River ◽  
Black Spots ◽  
Bony Plate ◽  
A New Species

Harttia merevari, a new species of loricariid catfish, is described from eight specimens captured in the upper Caura River, Orinoco River basin, Venezuela. The new species is recognized by the following combination of characters: abdomen naked; two or three preanal plates; a bony plate before each branchial opening; seven lateral plates between the pectoral and pelvic fins; maxillary barbel short and attached to the oral disk by a fleshy fold; head dorsal surface and anterior portion of the body light or dark yellow with numerous, round black spots; posterior region of the body light or dark yellow with five black transverse bands, dorsal central area of the two anterior bands diffused. The discovery of this new species extends the distribution of the genus northwest to include the Orinoco River basin on the northern slope of the Guyana shield.

scholarly journals A new species of Crenicichla (Perciformes: Cichlidae) from the Ventuari River, Upper Orinoco River Basin, Amazonas State, Venezuela

Zootaxa ◽  
2008 ◽  
Vol 1856 (1) ◽  
pp. 33 ◽  
Author(s):  
CARMEN G. MONTAÑA ◽  
HERNÁN LÓPEZ-FERNÁNDEZ ◽  
DONALD C. TAPHORN
Keyword(s):  
New Species ◽  
River Basin ◽  
The Body ◽  
Orinoco River ◽  
Coloration Pattern ◽  
Amazonas State ◽  
A New Species

We describe a new species of the genus Crenicichla Heckel, 1840, from the Ventuari River, a tributary of the Orinoco River in southern Venezuela. Crenicichla zebrina is distinguished from all other species in the genus by its unique coloration pattern, including the combination of a large, dark, vertically oriented, more or less oval-shaped humeral spot, and thin, dark bars, separated by narrow, vertical, yellowish bars extending between the dorsal and anal fin base on the caudal half of the body. Crenicichla zebrina is included in the putative C. acutirostris group (9 species) and represents the only species in the group known to date from the Orinoco basin.

A New Species of Eperua (Leguminosae, Detarioideae) from Amazonas State, Venezuela

2019 ◽  
Vol 24 (2) ◽  
pp. 341
Author(s):  
Gustavo A. Romero-González ◽  
Gerardo A. Aymard C.
Keyword(s):  
New Species ◽  
Amazonas State ◽  
A New Species

A new species of Cribraria (Myxomycetes) from Australia

2018 ◽  
Vol 52 (2) ◽  
pp. 379-385 ◽  
Author(s):  
S. L. Stephenson ◽  
Yu. K. Novozhilov ◽  
P. Wellman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Lemon Yellow ◽  
Moist Chamber ◽  
Light Yellow ◽  
Dark Violet ◽  
The Stability ◽  
A New Species ◽  
Scanning Electron

A new species of Cribraria, described herein as C. bicolor, appeared in moist chamber cultures on samples of the bark of Eucalyptus sp. collected at two localities in Australia. The morphology of representative specimens was examined by light and scanning electron microscopy, and micrographs of relevant morphological details of sporocarps and spores are provided. The species has a number of distinct and unique morphological features, including a glossy bright-violet globose sporotheca and a two-colored long stalk which is bright-red over the lower one-third and light yellow or lemon-yellow over the upper two-thirds. The combination of these characteristics as well as a shallow calyculus which is dark-violet when viewed under a dissecting microscope and bright red in transmitted light when mounted in lactophenol makes C. bicolor a well-defined morphospecies when compared to all other species of Cribraria. The stability of the taxonomic characters of the species was confirmed by an examination of a number of specimens.

scholarly journals Guianacara dacrya, a new species from the rio Branco and Essequibo River drainages of the Guiana Shield (Perciformes: Cichlidae)

2011 ◽  
Vol 9 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Jessica H Arbour ◽  
Hernán López-Fernández
Keyword(s):  
New Species ◽  
River Basins ◽  
Guiana Shield ◽  
Dorsal Fin ◽  
White Spots ◽  
Tooth Plate ◽  
Northern Brazil ◽  
Pharyngeal Jaw ◽  
River Drainages ◽  
A New Species

A new species of Guianacara is described from tributaries of the Essequibo River and the rio Branco in Guyana and northern Brazil. Guianacara dacrya, new species, can be diagnosed from all congeners by the possession of a unique infraorbital stripe and by the shape of the lateral margin of the lower pharyngeal jaw tooth plate. Guianacara dacrya can be further distinguished from G. geayi, G. owroewefi, G. sphenozona and G. stergiosi by the possession of a thin midlateral bar, from G. cuyunii by the possession of dusky branchiostegal membranes and from G. oelemariensis by the possession of two supraneurals. This species differs from most congeners by the presence of white spots on the spiny portion of the dorsal fin, the placement of the midlateral spot, the presence of filaments on the dorsal, anal and in rare cases the caudal-fin and from at least the Venezuelan species by several morphometric variables. Guianacara dacrya is known from the Essequibo, Takutu and Ireng River basins of Guyana and possibly from the rio Uraricoera in the rio Branco basin in Brazil. A key to the species is provided.

The new Belostoma fittkaui species group with supplemental descriptions of B. fittkaui De Carlo and B. sayagoi De Carlo

Zootaxa ◽  
2021 ◽  
Vol 4942 (4) ◽  
pp. 583-591
Author(s):  
FABIANO STEFANELLO
Keyword(s):  
New Species ◽  
South America ◽  
Comparative Morphology ◽  
Species Group ◽  
Type Material ◽  
Extreme Variation ◽  
Species Groups ◽  
A New Species ◽  
Tropical South America

The giant water bug fauna from tropical South America remains poorly known. Three species of Belostoma Latreille (Belostoma fittkaui De Carlo, B. sayagoi De Carlo and B. hirsutum Roback & Nieser) have been cited only a few times in the literature. These three species are remarkable since they represent an extreme variation for the genus, with article II of the labium distinctly shorter than article III. Here, the synonymy of B. hirsutum with B. sayagoi is proposed based on examination of type material and additional specimens. Further, B. fittkaui and B. sayagoi are redescribed, including discussion about comparative morphology with congeners. A new species group is proposed for these species and a key to the Belostoma species groups is provided. Distribution records are also updated. 

Grammatonotus bianchi, a new species of splendid perch (Percoidei: Callanthiidae) from Myanmar, northeastern Indian Ocean

Zootaxa ◽  
2021 ◽  
Vol 4996 (3) ◽  
pp. 513-524
Author(s):  
MARK W. LISHER ◽  
HTUN THEIN ◽  
PETER N. PSOMADAKIS
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Andaman Sea ◽  
Caudal Fin ◽  
Large Head ◽  
Caudal Fin Shape ◽  
A New Species ◽  
Fin Shape

A new splendid perch, Grammatonotus bianchi sp. nov. is described on the basis of two specimens (45.9–68.7 mm SL) collected at 184 m depth in the Andaman Sea off the coast of Myanmar during bottom surveys conducted by the R/V Dr Fridtjof Nansen in 2018. The new species can be distinguished from all congeners by its large head (37.7–38.6% SL), large orbit (14.4–15.3% SL), caudal-fin shape, and fresh coloration. A key to Indian Ocean species of Grammatonotus is provided.  

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