A new species of Imparfinis Eigenmann & Norris, 1900 (Siluriformes: Heptapteridae) from the Tapajós basin, Brazil

Zootaxa ◽  
2019 ◽  
Vol 4701 (5) ◽  
pp. 461-472
Author(s):  
ÍTHALO DA SILVA CASTRO ◽  
WOLMAR BENJAMIN WOSIACKI
Keyword(s):  
New Species ◽  
Neotropical Region ◽  
Valid Species ◽  
Distal Margin ◽  
Caudal Peduncle ◽  
The Andes ◽  
Brown Band ◽  
Northern Brazil ◽  
Uruguay River ◽  
A New Species

Imparfinis comprises 20 valid species in the Heptapteridae, being the most diverse taxonomic group of catfishes of the Nemuroglanis subclade. The genus has one of the widest geographical distributions in the neotropical region, found on both sides of the Andes, from Costa Rica to the Paraná and Uruguay river basins in Argentina. A new species of Imparfinis is described from streams of the upper Rio Tapajós and its tributary Teles Pires in northern Brazil. The new species is diagnosed from all congeners by the presence of a vertical dark brown band W-shaped at the base of the caudal-fin rays, a thick dark brown lateral stripe from the snout to the end of the caudal peduncle, dark brown head, long maxillary barbel surpassing the distal margin of the pectoral fin, and presence of 39 or 40 total vertebrae. 

scholarly journals A new species of Tetragonopterus Cuvier, 1816 (Characiformes: Characidae: Tetragonopterinae) from the rio Jari, Amapá, northern Brazil

2011 ◽  
Vol 9 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Bruno F Melo ◽  
Ricardo C Benine ◽  
Tatiane C Mariguela ◽  
Claudio Oliveira
Keyword(s):  
New Species ◽  
Mitochondrial Gene ◽  
The Other ◽  
New Combination ◽  
Valid Species ◽  
Caudal Peduncle ◽  
C Subunit ◽  
Northern Brazil ◽  
Square Spot ◽  
A New Species

A new species of Tetragonopterus is described from the rio Jari, a tributary to the left margin of rio Amazonas, at the border between Amapá and Pará States, northern Brazil. It is morphologically diagnosed from the other species of the genus (T. argenteus, T. chalceus, and T. rarus new combination) by the lozenge-shaped spot on the caudal peduncle vs. rounded to square spot on the other species. Partial sequences of the mitochondrial gene Cytochrome Oxidase C subunit I, from representatives of all valid species of Tetragonopterus, including this new species, were analyzed. The obtained results revealed a significant genetic distance between the new species and its congeners. A discussion on the new combination, Tetragonopterus rarus, is also provided.

scholarly journals New species of Cyphocharax (Characiformes: Curimatidae) from the upper rio Negro, Amazon basin

2014 ◽  
Vol 12 (2) ◽  
pp. 327-332 ◽  
Author(s):  
Bruno F. Melo ◽  
Richard P. Vari
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Rio Negro ◽  
Fin Rays ◽  
Dark Pigmentation ◽  
Northern Brazil ◽  
Adipose Fin ◽  
A New Species

A new species of Cyphocharax, Curimatidae, apparently endemic to the blackwater upper rio Negro of the Amazon basin in northern Brazil, is described.The new species is readily distinguished from its congeners by the presence of a distinctly longitudinally elongate, posteriorly vertically expanding patch of dark pigmentation along the midlateral surface of the caudal peduncle, with the patch extending from the base of the middle caudal-fin rays anteriorly past the vertical through the posterior terminus of the adipose fin. The new species additionally differs from all congeners in details of body and fin pigmentation and meristic and morphometric ratios. Evidence for the assignment of the species to Cyphocharax and the occurrence of other species of the Curimatidae apparently endemic to the upper rio Negro catchment is discussed.

Description of a new species of sand-dwelling catfish of the genus Stenolicmus (Siluriformes; Trichomycteridae)

Zootaxa ◽  
2011 ◽  
Vol 2752 (1) ◽  
pp. 62 ◽  
Author(s):  
WOLMAR BENJAMIN WOSIACKI ◽  
DANIEL PIRES COUTINHO ◽  
LUCIANO FOGAÇA DE ASSIS MONTAG
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Color Pattern ◽  
Distal Margin ◽  
Dorsal Region ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Left Tributary ◽  
Fin Length ◽  
A New Species

Stenolicmus ix, new species, is described from Igarapé Curuá, left tributary of the Rio Amazonas, Pará, Brazil. It can be distinguished from S. sarmientoi by the length of the nasal barbels that reach the base of the first opercular odontodes; length of the maxillary barbels that reach the posterior margin of the opercular odontode plate; seven well-developed opercular odontodes; seven well-developed interopercular odontodes; color pattern of the dorsal region of trunk composed of agglomerated chromatophores forming circular patches twice the diameter of the eye; proportionally large eyes, 11.8% HL; caudal peduncle tall, 11.6% SL, without dark bar at base of the caudal fin; length of the head proportionately larger, 17.9% SL; unbranched rays of caudal fin reaching distal margin of fin. Comparisons with other Sarcoglanidinae and Trichomycteridae are presented. Some comments on the systematics and phylogenetic relationships of the group are made.

A new species and new records of Downeshelea Wirth & Grogan in Neotropical Mexico (Diptera: Ceratopogonidae)

Zootaxa ◽  
2012 ◽  
Vol 3394 (1) ◽  
pp. 64 ◽  
Author(s):  
HERÓN HUERTA ◽  
MARIA LUIZA FELIPPE-BAUER ◽  
GUSTAVO R. SPINELLI
Keyword(s):  
New Species ◽  
New World ◽  
New Genus ◽  
New Records ◽  
Neotropical Region ◽  
The World ◽  
Northern Brazil ◽  
A New Species

In the revision of the Ceratopogonini of the World, Wirth & Grogan (1988) placed the species of the Monohelea multilineata group in the new genus Downeshelea, which includes 33 species (Borkent, 2011), most of them known from the New World. Borkent and Spinelli (2000, 2007) listed 18 species from the Neotropical Region and Felippe-Bauer and Silva (2008) subsequently described D. oliveirai Felippe-Bauer from northern Brazil. From Mexico, only D. multilineata (Lutz) and D. panamensis (Lane & Wirth) have been reported.

On a new Melanosuchus species (Alligatoroidea: Caimaninae) from Solimões Formation (Eocene-Pliocene), Northern Brazil, and evolution of Caimaninae

Zootaxa ◽  
2020 ◽  
Vol 4894 (4) ◽  
pp. 561-593
Author(s):  
JONAS PEREIRA DE SOUZA-FILHO ◽  
EDSON GUILHERME ◽  
PETER MANN DE TOLEDO ◽  
ISMAR DE SOUZA CARVALHO ◽  
FRANCISCO RICARDO NEGRI ◽  
...  
Keyword(s):  
New Species ◽  
South America ◽  
Phylogenetic Inference ◽  
Generalist Predator ◽  
Quantitative Morphology ◽  
Upper Miocene ◽  
The Andes ◽  
Geological Unit ◽  
Northern Brazil ◽  
A New Species

The Solimões Formation (Eocene-Pliocene) is a well-known geological unit due to the great diversity of crocodylian species. Here we describe a new species of Melanosuchus, M. latrubessei sp. nov., from the Talismã locality, state of Amazonas, from the Upper Miocene of the Solimões Formation (Solimões Basin, Brazil). A new phylogenetic inference focused on Caimaninae is provided and the different evolutionary scenarios involving this new species are discussed. In addition, quantitative morphology studies are carried out and comments regarding the paleoecology aspects of this new species are made. M. latrubessei represents a medium-sized generalist predator, being proportional to the medium-sized M. niger. This new species inhabited the drainages of the Solimões Formation and was ecologically related to other taxa of crocodylians during the proto-Amazon Miocene. The evolutionary advantages of Melanosuchus genus are discussed to better understand the biogeographical occurrence of M. niger in South America, a species which survives to this day in contrast to several other species that became extinct during the Miocene-Pliocene periods. The extinction of the Miocene-Pliocene crocodylian taxa of the Solimões Formation, including Melanosuchus latrubessei, seems to be directly related with the uplift of the northern portions of the Andes, which generated significantly changes in drainages and Amazon paleoenvironments. 

Revision of the peristediid genus Satyrichthys (Actinopterygii: Teleostei) with the description of a new species, S. milleri sp. nov.

Zootaxa ◽  
2013 ◽  
Vol 3635 (4) ◽  
pp. 419-438 ◽  
Author(s):  
TOSHIO KAWAI
Keyword(s):  
New Species ◽  
Junior Synonym ◽  
Valid Species ◽  
Phylogenetic Hypothesis ◽  
Caudal Peduncle ◽  
New Synonyms ◽  
Previously Treated ◽  
One New Species ◽  
A New Species

The Indo-Pacific peristediid genus Satyrichthys Kaup, 1873 was first diagnosed as having a broad head with mesethmoid, postocular, parietal and preopercular spines. Later, most ichthyologists characterized Satyrichthys by its toothless jaws and strong preopercular spine. Kawai (2008) divided Satyrichthys into two genera, Satyrichthys and Scalicus, on the basis of a phylogenetic hypothesis, and redefined Satyrichthys. Seven species of Satyrichthys are recognized here, including one new species: S. clavilapis, S. laticeps, S. longiceps, S. milleri sp. nov., S. moluccensis, S. rieffeli and S. welchi. The new species is distinguished from its congeners in having equilateral-triangular rostral projections, 4 lip and 4 chin barbels, and no anterior directed spines on the upper lateral row of the caudal peduncle. Satyrichthys laticeps, previously treated as a junior synonym of S. moluccensis, is regarded as a valid species. The following new synonyms are noted: S. adeni, S. halyi and S. magnus are all junior synonyms of S. laticeps; S. isokawae is a junior synonym of S. moluccensis; and S. lingi is a junior synonym of S. welchi. In addition, a neotype is designated for S. moluccensis.

A new species of Aegidium Arrow (Coleoptera: Scarabaeidae: Orphninae) from Colombia

Zootaxa ◽  
2021 ◽  
Vol 4927 (4) ◽  
pp. 583-586
Author(s):  
ANDREY V. FROLOV ◽  
LILIA A. AKHMETOVA
Keyword(s):  
New Species ◽  
Neotropical Region ◽  
Valid Species ◽  
The South ◽  
Southern Mexico ◽  
The North ◽  
A New Species

In the Neotropical Region, Orphninae (Coleoptera: Scarabaeidae) are represented by the endemic tribe Aegidiini, which comprises five genera and 49 species (Paulian 1948; Colby 2009; Frolov & Vaz-de-Mello 2015; Frolov et al. 2017a, 2017b, 2017c, 2019). Aegidium Westwood is the largest genus of the tribe and it comprises 24 valid species known from the southern Mexico in the north to Central Bolivia in the south (Frolov et al. 2015; Rojkoff & Frolov 2017; Frolov & Akhmetova 2020). 

A new species of snook, Centropomus (Teleostei: Centropomidae),  from northern South America, with notes on the geographic distribution of other species of the genus

Zootaxa ◽  
2019 ◽  
Vol 4671 (1) ◽  
pp. 81-92
Author(s):  
ALFREDO CARVALHO-FILHO ◽  
JOICIANE DE OLIVEIRA ◽  
CAMILA SOARES ◽  
JULIANA ARARIPE
Keyword(s):  
New Species ◽  
Caudal Peduncle ◽  
Western Atlantic ◽  
Centropomus Undecimalis ◽  
Interorbital Width ◽  
Mean Diameter ◽  
Mandible Length ◽  
Northern Brazil ◽  
Northern South America ◽  
A New Species

Centropomus irae sp. nov. (Centropomidae) is described from two localities in the state of Amapá, northern Brazil. The new species differs from all its congeners by the typically brown-colored lateral line, the relatively smaller mean interorbital width (4.1% of SL vs. 5.2–6.9%), mean snout length (8.9% of SL vs. 9.8–11.1%), mean diameter of the orbit (4.5% of SL vs. 5.4–7.3%), and mean mandible length (15.7% of SL vs.19.9–21.6%). The new species can also be distinguished from the similar Centropomus undecimalis by the number of scales around the caudal peduncle (18–23, usually 19–21, vs. 22–28, usually 24–27). With Centropomus irae sp. nov., seven species of the genus are now known to occur in the western Atlantic. The distribution of Centropomus in Brazilian waters is updated and a key to the species of this genus is presented. [Zoobank URL: urn:lsid:zoobank.org:act:3D497B38-48A5-4A6E-B377-6D57E82D4DE4[ 

scholarly journals Triplophysa pseudostenura, a new nemacheiline loach (Cypriniformes: Balitoridae) from the Yalong River of China

Zootaxa ◽  
2012 ◽  
Vol 3586 (1) ◽  
pp. 272 ◽  
Author(s):  
CHUNLIN HE ◽  
E ZHANG ◽  
ZHAOBIN SONG
Keyword(s):  
New Species ◽  
Yangtze River ◽  
Valid Species ◽  
Posterior Chamber ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
River Drainage ◽  
Dorsal Fin ◽  
A New Species ◽  
Yalong River

A new species of nemacheiline loach, Triplophysa pseudostenura, is described from the Yalong River, a tributary of theupper Yangtze River drainage in China. Previous collectors misidentified the species as T. stenura. Triplophysapseudostenura can be separated from T. stenura and other valid species of Triplophysa by the following combination ofcharacters: body smooth and without scales; head tapering; lips thin and smooth; trunk and caudal peduncle slender,laterally compressed; depth of caudal peduncle tapering posteroventrally approaching caudal fin; posterior chamber of gasbladder reduced or absent; intestine short, forming a zigzag loop posterior to bottom of ‘U’-shaped stomach; insertion of pelvic fins anterior to dorsal-fin origin; caudal fin deeply concave.

scholarly journals Apu, a new genus of Euchromiina (Lepidoptera: Erebidae: Arctiinae: Arctiini), and a new species from the montane forests of southeastern Peru

2021 ◽  
Vol 47 (3) ◽  
pp. 639-648
Author(s):  
Juan Grados
Keyword(s):  
New Species ◽  
Male Genitalia ◽  
New Genus ◽  
Morphological Characters ◽  
Neotropical Region ◽  
Montane Forests ◽  
Diagnostic Characters ◽  
The Andes ◽  
A New Species

Based on external morphological characters and the structure of the male genitalia, a new genus of Euchromiina from the Neotropical region, Apu gen. nov. is described. A new species is described, Apu mooreorum sp. nov. and the species Apu flavicornis (Druce) comb. nov. is redescribed. The genus occurs in the montane forests of the Andes. Diagnostic characters are provided for the genus and the two species which comprise it. Photographs of the adults of both species are provided, as well as the morphological characters of the male genitalia.

Sign in / Sign up

Export Citation Format

Share Document