scholarly journals New species of the Corumbataia cuestae group (Siluriformes: Loricariidae) from the Rio Tocantins basin, with comments on its phylogenetic relationships

2020 ◽  
Vol 18 (4) ◽  
Author(s):  
Mateus Giovanni Rocha Thimotheo ◽  
Ricardo Cardoso Benine ◽  
Claudio Oliveira ◽  
Gabriel de Souza da Costa e Silva
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Dorsal View ◽  
Pectoral Girdle ◽  
Mitochondrial Cytochrome ◽  
Lower Lip ◽  
Transversal Line ◽  
Central Brazil ◽  
Adipose Fin ◽  
A New Species

Abstract A new species of Corumbataia is described from Rio Maranhão, Rio Tocantins basin, central Brazil. The new species is distinguished from all congeners by the presence of a small, naked area on snout tip; by having the abdomen covered with small platelets forming a shield which reaches the lateral mid-ventral plates; by the anterior profile of the head rounded in dorsal view; by the lower lip not reaching the transversal line of the pectoral girdle; and by the presence of 28 or 29 vertebrae. High genetic divergence in mitochondrial cytochrome c oxidase subunit I (COI) further supports the validity of this new species. Our phylogenetic analysis shows a derived subclade in Corumbataia, herein named as the Corumbataia cuestae group, composed of the new species plus C. cuestae, C. tocantinensis, C. britskii, C. liliai, and C. lucianoi. This group is defined by having a conspicuous crest of hypertrophied odontodes on head; absence of the adipose fin or a single series of platelets at adipose-fin position; and anastomosis of the infraorbital and otic sensory canals over the pterotic-supracleithrum. Here we also restrict the distribution of C. tocantinensis to the Rio Araguaia basin.

New species of Neoplecostomus (Neoplecostomini: Loricariidae) lacking adipose fin from upper Rio Paraná basin, central Brazil

Zootaxa ◽  
2019 ◽  
Vol 4544 (1) ◽  
pp. 93
Author(s):  
GABRIEL S. C. SILVA ◽  
LAIS REIA ◽  
CLÁUDIO H. ZAWADZKI ◽  
FABIO F. ROXO
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Lower Lip ◽  
Central Brazil ◽  
Paraná Basin ◽  
Adipose Fin ◽  
Parana Basin ◽  
A New Species

In the present study, we describe a new species of Neoplecostomus from central Brazil. The new species is known from Córrego Cachoeira a right tributary of the upper Rio Paraná basin. It can be distinguished from all congeners by absence of adipose fin or azygous plates on the dorsum surface of the caudal peduncle. Additionally, the new species differs from N. botucatu and N. paranensis by having a dark caudal fin with a unique v-shaped hyaline vertical area and a larger lower lip. A discussion on the morphological variation of adipose fin among species of Neoplecostomus is also provided. 

A new species of the Ololygon catharinae species group (Anura: Hylidae) from the Cerrado biome, State of Goiás, Central Brazil

Zootaxa ◽  
2018 ◽  
Vol 4425 (2) ◽  
pp. 283 ◽  
Author(s):  
SHEILA PEREIRA DE ANDRADE ◽  
DANUSY LOPES SANTOS ◽  
CEZAR FILHO ROCHA ◽  
JOSÉ P. JR. POMBAL ◽  
WILIAN VAZ-SILVA
Keyword(s):  
New Species ◽  
River Basin ◽  
Dorsal View ◽  
Species Group ◽  
Dry Forest ◽  
Medium Size ◽  
Morphological Attributes ◽  
Cerrado Biome ◽  
Central Brazil ◽  
A New Species

We describe a new species of Ololygon from the Cerrado biome, Central Brazil. The new species is assigned to the Ololygon catharinae species group based in morphological attributes. Ololygon goya sp. nov. in known only from type locality—Sítio d’Abadia municipality, State of Goiás—and associated with riparian environments connected to seasonal dry forest on the banks of the Corrente river, a tributary of the Paranã river basin. The new species is characterized by the combination of the following characters: medium size (24.4–38.8 mm SVL); snout subovoid in dorsal view; canthus rostralis well defined; males with hypertrophied forearms and nuptial pads; inguinal region and hidden surfaces of thigh with irregular dark brown spots on pale yellowish background. We also describe the external morphology and oral morphology of tadpoles, and the advertisement calls of the new species. 

Parakysis hystriculus, a new species of catfish (Siluriformes: Akysidae) from Sumatra

Zootaxa ◽  
2009 ◽  
Vol 1977 (1) ◽  
pp. 39-48
Author(s):  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Dorsal View ◽  
Caudal Fin ◽  
Lower Lip ◽  
Posterior Branch ◽  
Anterior Branch ◽  
Fin Rays ◽  
Left And Right ◽  
A New Species ◽  
Pelvic Fin

Parakysis hystriculus, new species, is described from the Lalang River drainage in southern Sumatra. It can be distinguished from congeners in having a combination of branched pelvic-fin rays with anterior branch always shorter than posterior branch, lateral edges of head evenly sloping in dorsal view, anteriormost pair of accessory inner mandibular barbels longer than distance separating bases of left and right barbel, outer mandibular barbel with one accessory barbel, mandibular laterosensory pore between bases of inner and outer mandibular barbels present, margin of lower lip with medial concavity, anal fin rounded, caudal fin with narrow lobes having evenly-tapering posteromedial margins and 10 branched rays without secondary branches.

scholarly journals Parotocinclus seridoensis, a new hypoptopomatine catfish (Siluriformes: Loricariidae) from the upper rio Piranhas-Açu basin, northeastern Brazil

2013 ◽  
Vol 11 (4) ◽  
pp. 787-796 ◽  
Author(s):  
Telton Pedro A. Ramos ◽  
Luciano F. Barros-Neto ◽  
Heraldo A. Britski ◽  
Sergio M. Q. Lima
Keyword(s):  
Species Richness ◽  
New Species ◽  
Endemic Species ◽  
Northeastern Brazil ◽  
Southeastern Brazil ◽  
Pectoral Girdle ◽  
High Species Richness ◽  
Adipose Fin ◽  
A New Species ◽  
Semi Arid

A new species of Parotocinclus is described from the upper rio Piranhas-Açu basin, northeastern Brazil. The new species differs from all its congeners, except P. bidentatus, P. muriaensis (both from rio Paraíba do Sul basin, southeastern Brazil), and P. spilurus (rio Jaguaribe basin, northeastern Brazil) by presenting the adipose fin rudimentary or absent. The new species differs from P. bidentatus, P. muriaensis, and P. spilurus mainly by presenting the abdomen region extensively naked, with few reduced rounded dermal platelets between the pectoral girdle and the anus. Parotocinclus seridoensis is probably an endemic species of the semi-arid Caatinga, region where the genus presents high species richness.

scholarly journals Triplophysa wulongensis, a new species of cave-dwelling loach (Teleostei, Nemacheilidae) from Chongqing, Southwest China

ZooKeys ◽  
2021 ◽  
Vol 1026 ◽  
pp. 179-192
Author(s):  
Shijing Chen ◽  
Bakhtiyor Sheraliev ◽  
Lu Shu ◽  
Zuogang Peng
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Lateral Line ◽  
Southwest China ◽  
Posterior Chamber ◽  
Mitochondrial Cytochrome ◽  
Gene Sequences ◽  
Stomach Body ◽  
Wujiang River ◽  
A New Species

We describe a new species of cave-dwelling loach, Triplophysa wulongensissp. nov., based on specimens collected in a subterranean pool in a cave in Wulong County, Chongqing, Southwest China. The pool is connected to the Wujiang River drainage. Triplophysa wulongensis differs from its congeners by the following combination of characters: eyes present, caudal fin with 18 branched rays; posterior chamber of the air bladder degenerate; stomach U-shaped; intestine without bends or loops immediately posterior to stomach; body smooth and scaleless, and lateral line complete. The mitochondrial cytochrome b sequence differs from those of other published sequences of species of Triplophysa by 14.9–24.9% in K2P distance. Phylogenetic analysis based on cytochrome b gene sequences recovered T. wulongensis as sister taxon to all other cave-dwelling species of Triplophysa.

scholarly journals Bringing order to a complex system: phenotypic and genotypic evidence contribute to the taxonomy of Tityus (Scorpiones, Buthidae) and support the description of a new species

ZooKeys ◽  
2021 ◽  
Vol 1075 ◽  
pp. 33-75
Author(s):  
Jairo A. Moreno-González ◽  
Ricardo Pinto-da-Rocha ◽  
Jonas E. Gallão
Keyword(s):  
Complex System ◽  
Phylogenetic Analysis ◽  
New Species ◽  
Species Group ◽  
Phenotypic Characters ◽  
Central Brazil ◽  
Coloration Pattern ◽  
Molecular Phylogenetic ◽  
Species Groups ◽  
A New Species

We present a molecular phylogenetic analysis including a survey for overlooked phenotypic characters. Based on both analysis and characters a new cave-dwelling species is described: Tityus (Tityus) spelaeussp. nov. from the Russão II cave, Posse, state of Goiás, Central Brazil. Characters such as the glandular regions of the female pectinal basal piece and basal middle lamellae of pectines, and the distribution of the ventral setae of telotarsi I–IV proved to be useful to constructing the taxonomy of species and species groups of Tityus. The new species is a member of the Tityus trivittatus species-group of Tityus (Tityus) and can be readily recognized by the immaculate coloration pattern and the more developed glandular region on the female pectinal basal piece. In addition, we provide a discussion of the phylogenetic relationships observed within Tityus, on the relevance of the new phenotypic characters to the modern taxonomy of the genus Tityus, and to the records of Brazilian cave scorpions.

scholarly journals Hemigrammus tocantinsi: a new species from the upper rio Tocantins basin, Central Brazil (Characiformes: Characidae)

2010 ◽  
Vol 8 (2) ◽  
pp. 247-254 ◽  
Author(s):  
Fernando R Carvalho ◽  
Vinicius A Bertaco ◽  
Fernando C Jerep
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Body Measurements ◽  
Central Brazil ◽  
Longitudinal Stripe ◽  
Fin Rays ◽  
Adipose Fin ◽  
A New Species

Hemigrammus tocantinsi is described from the upper rio Tocantins basin, Chapada dos Veadeiros, Goiás State, Central Brazil. The new species differs from its congeners by the presence of 15-17 branched anal-fin rays, longitudinal stripe relatively narrow anteriorly and wider posteriorly, and one or two maxillary teeth. Sexual dimorphism of the new species is characterized by differences among the color in life, adipose-fin origin, body measurements, in addition to presence of bony hooks in the anal and pelvic fins of males.

scholarly journals Description of a new species of Tatia from rio Tocantins drainage, central Brazil, with notes on Tatia simplex Mees, 1974 (Siluriformes, Auchenipteridae)

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Jordson de Souza e Souza ◽  
Luisa M. Sarmento-Soares ◽  
André L. Colares Canto ◽  
Frank Raynner V. Ribeiro
Keyword(s):  
New Species ◽  
South America ◽  
Valid Species ◽  
Caudal Peduncle ◽  
Central Brazil ◽  
Coastal Rivers ◽  
Adipose Fin ◽  
Peduncle Length ◽  
A New Species

ABSTRACT Tatia comprises twenty-five valid species, distributed in the main inland watersheds of South America, including the Orinoco, Essequibo, and coastal rivers of Suriname, Amazon, upper rio Paraná and São Francisco basins. A new species is described from tributaries of upper rio Manuel Alves on uplands of Serra Geral do Tocantins plateau, Tocantins State, Brazil. It is promptly distinguished from all congeners, except Tatia britskii, due to absence of an adipose fin. It differs from T. britskii by the longer caudal peduncle length (24.1–30.5% SL, mean 25.3 vs. 20.0–22.7, mean 20.9); caudal peduncle depth (10.9–16.8 SL, mean 14.1 vs. 9.4–10.5, mean 9.8), and anterior cranial border with mesethmoid width equals its length (vs. width approximately three times its length in T. britskii). Additionally, information regarding the poorly known species Tatia simplex originally described from rio das Mortes, is provided.

Description of a new species of Gymnotocinclus from the rio Tocantins basin with phylogenetic analysis of the subfamily Hypoptopomatinae (Siluriformes: Loricariidae)

Zootaxa ◽  
2017 ◽  
Vol 4268 (3) ◽  
pp. 337 ◽  
Author(s):  
FÁBIO F. ROXO ◽  
GABRIEL S. C. SILVA ◽  
LUZ ENEIDA OCHOA ◽  
CLÁUDIO H. ZAWADZKI
Keyword(s):  
New Species ◽  
Ventral View ◽  
Sister Group ◽  
Published Data ◽  
Pectoral Girdle ◽  
Sister Clade ◽  
16S Rna ◽  
Pectoral Spine ◽  
Adipose Fin ◽  
A New Species

Gymnotocinclus canoeiro n. sp. of the Hypoptopomatinae is described from small tributaries of the upper rio Tocantins basin. It is distinguished from G. anosteos by having five characters: (1) the presence of body dermal plates, (2) the pectoral girdle not exposed in ventral view, (3) the pelvic spine longer than pectoral spine in males, (4) the pectoral fin with seven to eight branched rays, and (5) the presence of an adipose fin. Furthermore, maximum likelihood (ML) analysis was used to estimate a molecular phylogeny from previously published data of one nuclear (F-Reticulon 4) and three mitochondrial (16S RNA, COI and CytB) genes. The phylogenetic results revealed the new species as a sister taxon of Gymnotocinclus anosteos within the Otothyrini. We also included samples of Nannoplecostomus eleonorae that appeared sister group to all other Neoplecostomini species, and Plesioptopoma curvidens that appeared within the Neoplecostomini forming a sister clade to all species of Neoplecostomus, except N. ribeirensis and the species of Pareiorhina, except P. rudolphi.

A new species of small Scinax Wagler, 1830 (Amphibia, Anura, Hylidae) of the Scinax ruber clade from Cerrado of central Brazil

2010 ◽  
Vol 31 (3) ◽  
pp. 411-418 ◽  
Author(s):  
José Pombal Jr. ◽  
Manoela Woitovicz Cardoso
Keyword(s):  
New Species ◽  
Dorsal View ◽  
Lateral View ◽  
Slender Body ◽  
Brazilian Cerrado ◽  
Type Specimens ◽  
Central Brazil ◽  
A New Species

AbstractA new species of the Scinax ruber clade from the Brazilian Cerrado Domain similar to Scinax fuscomarginatus, S. parkeri, S. trilineatus and S. wandae is described. It is characterized by small snout-vent lenght, body slender, head approximately as long as wide and slightly wider than body, subovoid snout in dorsal view, protruding snout in lateral view, a developed supratympanic fold, absence of flash colour on the posterior surfaces of thighs, hidden portions of shanks and groin, and large vocal sac. Scinax lutzorum sp. nov. differs from S. fuscomarginatus, S. parkeri and S. trilineatus by its slightly larger SVL; from Scinax fuscomarginatus and S. parkeri it differs by its more slender body; from Scinax fuscomarginatus and S. trilineatus the new species differs by its wider head and more protruding eyes; and it differs from Scinax parkeri and S. wandae by its shorter snout. Comments on the type specimens of S. fuscomarginatus are presented and a lectotype is designated for this species.

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