Pseudacanthicus major: description of one of the largest known Loricariidae (Hypostominae: Ancistrini), a species from rio Tocantins basin, Brazil

Zootaxa ◽  
2018 ◽  
Vol 4387 (3) ◽  
pp. 499
Author(s):  
CARINE C. CHAMON ◽  
THIAGO COSTA E SILVA
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
Posterior Margin ◽  
Color Pattern ◽  
Body Color ◽  
Posterior Edge ◽  
Anterior Process ◽  
French Guyana

The genus Pseudacanthicus currently comprises the following six species distributed in the Amazon and Tocantins basins, and coastal drainages from Guyana to French Guyana: P. serratus, P. fordii, P. histrix, P. spinosus, P. leopardus, P. pitanga, and P. pirarara. Herein we describe P. major, from rio Tocantins basin, one of the largest loricariid species known. The new species is distinguished from its congeners by the following combination of characters: having body color pattern with dark brown background without spots or blotches and dorsal and caudal fins with transversal white bands; anterior process of compound pterotic with no contacting with the posterior margin of the orbit and by the absence of a conspicuous crest on the posterior edge of parieto-supraocciptal. Other osteological characteristics are further used to diagnose P. major from others congeners. A discussion on gigantism and miniaturization in freshwater fish, ornamental fisheries activities, threats and conservation of the new species are also provided. 

scholarly journals A new species of leaffish Polycentrus Müller & Troschel, 1849 (Percomorpha: Polycentridae) from the rio Negro, Brazil

2014 ◽  
Vol 12 (4) ◽  
pp. 747-753 ◽  
Author(s):  
Daniel Pires Coutinho ◽  
Wolmar Benjamin Wosiacki
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Lower Edge ◽  
Posterior Edge ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Rio Negro ◽  
Ventral Edge ◽  
A New Species

A new species of Polycentrusis described from the rio Negro, in Brazil. It is distinguished from P. schomburgkii by the presence of two dark postocular and one subocular band, all smaller than orbital diameter, blunt snout, isognathous mouth, reduction of the serrations on the lower edge of the lacrimal-spines ranging from zero to two tiny spines at the posterior end, intensely serrated edge of the interopercle, fully serrated posterior edge of the vertical arm of the preopercle, presence of five pungent opercular spines, subopercle broadly serrated along most of its posterior ventral edge, presence of serrations dorsally on the posterior margin of the cleithrum, fourth ray of pectoral fin reaching the vertical through the anal-fin origin, 19-21 predorsal scales, 19-20 scales on dorsal-fin base, 12-14 scales on anal-fin base, and absence of a median opercular blotch.

scholarly journals Morphometric characteristics of mungkus fish (Sicyopterus sp.) from several rivers in Bengkulu Province, Indonesia

2021 ◽  
Vol 869 (1) ◽  
pp. 012025
Author(s):  
D F Lestari ◽  
Sipriyadi ◽  
A H Putra
Keyword(s):  
Freshwater Fish ◽  
Ventral Sucker ◽  
Fish Habitat ◽  
Common Species ◽  
Color Pattern ◽  
Body Color ◽  
Morphometric Characteristics ◽  
The South ◽  
Morphometric Characters ◽  
Living Species

Abstract Mungkus fish (Sicyopterus sp) is one of the freshwater fish that is caught by many people in Bengkulu Province. The mungkus fish are amphidromous and live in rocky rivers and fast-flowing rivers. This fish has a ventral sucker for sticking to rocks. The aim of this research was to determine the types of mungkus fish that can be found in Bengkulu Province waters based on morphometric characters. The research was conducted on 8 major rivers in 5 districts in Bengkulu Province including Argamakmur, Muko-Muko, Seluma, Manna, and Kaur. Based on the results, showed that the mungkus fish were characterized based on morphometric, there were 3 types of fish including Sicyopterus squamosissimus, Sicyopterus cynocephalus, and Sicyopterus lagocephalus. Mungkus fish found in the northern Bengkulu region tend to be smaller in size, have almost the same color pattern and darker body color than the fish found in the South Bengkulu region. The most common species found in Bengkulu is Sicyopterus squamosissimus. The Sicyopterus lagocephalus species can also only be found in rivers in the South Bengkulu region. The fish morphometric characteristics shows that differences in fish habitat will affect the growth of fish and the existence of living species in nature.

A new arc-striped species of Corydoras Lacépède, 1803 (Teleostei: Callichthyidae) from the Peruvian Amazon

Zootaxa ◽  
2021 ◽  
Vol 4948 (2) ◽  
pp. 184-200
Author(s):  
REBECCA FRANCES BENTLEY ◽  
STEVEN GRANT ◽  
LUIZ FERNANDO CASERTA TENCATT
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Ventral Surface ◽  
River Basins ◽  
Color Pattern ◽  
The Body ◽  
Peruvian Amazon ◽  
Black Stripe ◽  
Dorsal Fin ◽  
Adaptive Value

A new Corydoras is described from the Blanco and Ucayali river basins in Peru. The new species can be distinguished from its congeners by having the following features: (I) posterior margin of dorsal-fin spine with laminar serrations directed towards the origin of the spine; (II) a long, wide, arched, and continuous black stripe, which runs parallel to the dorsal profile of the body, extending at least from the region below anterior origin of dorsal fin to the anterior half of the ventral caudal-fin lobe; (III) a black stripe transversally crossing the eye, forming the typical mask-like blotch; mask clearly not fused to arched stripe in most specimens; some specimens with mask separated from arched stripe by a thin line around the suture between neurocranium (in the region composed by the posteroventral margin of parieto-supraoccipital plus the posterodorsal margin of the compound pterotic) and first dorsolateral body plate; (IV) posterior margin of pectoral-fin spine with laminar serrations directed towards the origin of the spine; (V) pointed snout, presenting a long mesethmoid, with anterior tip larger than 50% of the entire length of the bone; and (V) ventral surface of trunk covered by small, non-coalescent platelets. A discussion on the possible positive adaptive value of the arc-striped color pattern is also provided. 

scholarly journals A new species of pitviper of the genus Bothrops (Serpentes: Viperidae: Crotalinae) from the Central Andes of South America

Zootaxa ◽  
2019 ◽  
Vol 4656 (1) ◽  
pp. 99-120 ◽  
Author(s):  
JUAN TIMMS ◽  
JUAN C. CHAPARRO ◽  
PABLO J. VENEGAS ◽  
DAVID SALAZAR-VALENZUELA ◽  
GUSTAVO SCROCCHI ◽  
...  
Keyword(s):  
New Species ◽  
South America ◽  
Central Andes ◽  
Color Pattern ◽  
Body Color ◽  
Montane Forests ◽  
Southern Peru ◽  
Large Trees ◽  
A New Species

We describe a new species of montane pitviper of the genus Bothrops from the Cordillera Oriental of the Central Andes, distributed from southern Peru to central Bolivia. The new species can be distinguished from its congeners by the characteristic combination of a dorsal body color pattern consisting of triangular or subtriangular dark brown dorsal blotches, paired dark brown parallel occipital stripes, a conspicuous dark brown postocular stripe, the presence of canthorostrals in some specimens, prelacunal fused or partially fused with second supralabial, one scale usually separating internasals, rostral trapezoidal, two canthals oval to rounded, similar size or slightly larger than internasals, three or four medial intercanthals, eight to twelve intersupraoculars, intercanthals and intersupraoculars keeled and frequently slightly keeled, supraoculars oval, one to three suboculars, two to three postoculars, loreal subtriangular, two to six prefoveals, subfoveals absent, two or none postfoveals, one or two scales between suboculars and fourth supralabial, seven or eight supralabials, nine or eleven infralabials, 23–25 middorsal scales, 189–195 ventrals in females and 182–190 in males, 48–58 subcaudals in females and 54–63 in males, exceptionally undivided. The new species is apparently restricted to areas within Andean montane forests that are less humid and devoid of large trees. 

scholarly journals A new species of Microglanis(Siluriformes: Pseudopimelodidae) from the upper rio Tocantins basin, Goiás State, Central Brazil

2014 ◽  
Vol 12 (1) ◽  
pp. 81-87 ◽  
Author(s):  
Oscar Akio Shibatta
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Posterior Margin ◽  
Color Pattern ◽  
Occipital Region ◽  
Caudal Fin ◽  
Central Brazil ◽  
Unique Color ◽  
A New Species ◽  
Pelvic Fin

A new species of Microglanis is described from the upper rio Tocantins basin, Barro Alto, Goiás State, Brazil. This species is distinguished from the others by presenting a unique color pattern, consisting of round spots in the flank between the larger dark brown blotches. Moreover, it can be distinguished by the combination of the following features: caudal fin emarginate, the upper lobe slightly larger than the lower, lateral line relatively long, reaching vertical through posterior margin of the pelvic fin, and light stripe on supra-occipital region absent or very narrow and with irregular shape.

scholarly journals A new Moenkhausia Eigenmann, 1903 (Ostariophysi: Characiformes) from Chapada Diamantina, rio Paraguaçu Basin, Bahia, Northeastern Brazil

2007 ◽  
Vol 5 (3) ◽  
pp. 259-262 ◽  
Author(s):  
Ricardo C. Benine ◽  
Ricardo M. C. Castro ◽  
Alexandre C. A. Santos
Keyword(s):  
New Species ◽  
Color Pattern ◽  
Northeastern Brazil ◽  
Body Color ◽  
Median Line ◽  
Chapada Diamantina ◽  
Fin Rays

Moenkhausia diamantina, new species, is described from tributaries of the rio Paraguaçu, BA, northeastern Brazil. This species is distinguished from all congeners by features of body color pattern, the presence of scales on the predorsal median line and the number of anal-fin rays.

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 of Corinnella Thomas & Dominique, 2006 (Ephemeroptera: Baetidae)

Zootaxa ◽  
2013 ◽  
Vol 3608 (1) ◽  
pp. 75-80 ◽  
Author(s):  
R. BOLDRINI ◽  
F. F. SALLES ◽  
A. M.O. PES
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Original Description ◽  
Monotypic Genus ◽  
Tarsal Claw ◽  
French Guyana ◽  
Northern Brazil ◽  
First Time ◽  
A New Species

The monotypic genus Corinnella Thomas & Dominique, 2006, was described based on nymphs from French Guyana, and since the original description nothing has been added to knowledge of its systematics. The aim of the present paper is to describe a new species of the genus from Northern Brazil, to improve its diagnoses, and to report the genus for the first time from Brazil. The new species can be recognized by: labrum with discernible anteromedial emargination and process; posterior margin of terga IV with rounded spines; and tarsal claw with seven to nine denticles, with the outer and inner denticles distinctly longer than the others.

Definition of Lepidocyrtus lusitanicus Gama, 1964 species-complex (Collembola, Entomobryidae), with description of new species and color forms from the Iberian Peninsula

Zootaxa ◽  
2008 ◽  
Vol 1917 (1) ◽  
pp. 38-54 ◽  
Author(s):  
EDUARDO MATEOS
Keyword(s):  
New Species ◽  
Iberian Peninsula ◽  
Geographical Distribution ◽  
Species Complex ◽  
Color Pattern ◽  
Color Variation ◽  
Body Color ◽  
High Similarity ◽  
Definition Of ◽  
Pattern Variability

Lepidocyrtus lusitanicus is one of the species with greater color pattern variability within the genus Lepidocyrtus. Four subspecies have been described in relation to its body color variation. The study of various populations of Lepidocyrtus from the Iberian Peninsula has allowed me to describe the new chromatic form L. lusitanicus form A, as well as the new species L. bilobatus, which is very closely related to L. lusitanicus, and also shows high color pattern variability. The high similarity among species L. lusitanicus, L. selvaticus and L. bilobatus sp. nov., the high color pattern variability of their populations, the overlapping geographical distribution of many studied populations, and the presence of three dorsal macrochaetae between trichobothria m2 and a5 of the second abdominal tergum, led me to define the group Lepidocyrtus lusitanicus species-complex. This group included the three abovementioned species with all of their color forms.

scholarly journals Taxonomic revision of SpectracanthicusNijssen & Isbrücker (Loricariidae: Hypostominae: Ancistrini), with description of three new species

2014 ◽  
Vol 12 (1) ◽  
pp. 1-25 ◽  
Author(s):  
Carine C. Chamon ◽  
Lúcia H. Rapp Py-Daniel
Keyword(s):  
New Species ◽  
Taxonomic Revision ◽  
Black Body ◽  
Color Pattern ◽  
Phylogenetic Study ◽  
Posterior Edge ◽  
Large White ◽  
Taxonomic Review ◽  
White Spots ◽  
Three New Species

A taxonomic review of Spectracanthicus Nijssen & Isbrücker, including Oligancistrus Rapp Py-Daniel, following a phylogenetic study, is presented. Additionally to S. punctatissimus(Steindachner) and S. murinus Nijssen & Isbrücker, three new species are recognized based on the examination of 159 specimens: S. immaculatus n. sp. from rio Tapajós basin, differs from its congeners by its color pattern consisting of a dark gray body, with no dots or spots, and by having very slender teeth; Spectracanthicus tocantinensisn. sp., from the rio Tocantins drainage is distinguished by the color pattern consisting of dark brown or black body with small, yellowish dots (except in S. punctatissimus), presence of thick teeth, infraorbital 4 forming most of the posterior edge of the orbit and the large basipterigium fenestrae; and Spectracanthicus zuanonin. sp., from the rio Xingu basin is diagnosed by its color pattern consisting of large, white spots and by the larger orbital diameter. Other characters based on osteological features are also usefull to distinguish the species. A key to the species of the genus and a brief discussion of their threats and conservation are also provided.

Sign in / Sign up

Export Citation Format

Share Document