Two new species of Leporinus Agassiz, 1929 (Characiformes: Anostomidae) from tributaries of the lower Amazon basin in Brazil

Zootaxa ◽  
2016 ◽  
Vol 4178 (1) ◽  
pp. 97 ◽  
Author(s):  
JOSÉ L. O. BIRINDELLI ◽  
TULIO F. TEIXEIRA ◽  
HERALDO A. BRITSKI
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Phylogenetic Position ◽  
Caudal Peduncle ◽  
Diagnostic Features ◽  
Anterior Portion ◽  
Molecular Analyses ◽  
Two New Species ◽  
Available Information ◽  
Pelvic Fin

Two new species of Leporinus (Characiformes, Anostomidae) are described. Both new species are diagnosed by having one dark blotch on midline of anterior portion of the flank (between opercle and pelvic-fin origin) surrounded by five to seven dark blotches; and a subinferior mouth with three premaxillary teeth. Leporinus multimaculatus, new species, is distributed in small and medium-sized tributaries of the rio Tocantins and rio Xingu basins, and also in the rio Jari and coastal drainages of Amapá state, whereas L. torrenticola, new species, is endemic to the rapids of the rio Xingu and its main tributaries. The number of scale rows around the caudal peduncle is the main feature distinguishing L. multimaculatus from L. torrenticola. Comments on the diagnostic features of the newly described species are provided. In addition, the phylogenetic position and generic assignment of the new species are discussed based on available information from recent morphological and molecular analyses. 

Two new Hyphessobrycon (Characiformes: Characidae) species from Central Amazon basin, Brazil

Zootaxa ◽  
2017 ◽  
Vol 4318 (1) ◽  
pp. 123 ◽  
Author(s):  
CRISTIANO R. MOREIRA ◽  
FLÁVIO C.T. LIMA
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
The Body ◽  
Dark Band ◽  
Caudal Peduncle ◽  
Anterior Portion ◽  
Central Amazon ◽  
Two New Species

Two new species of Hyphessobrycon, H. ericae and H. wosiackii, are described from the Amazon basin, Brazil. Both new species are distinguished from congeners by the coloration, composed by one humeral blotch merging with an anterior dark band restricted to the anterior portion of the body and the presence of a caudal peduncle blotch. Hyphessobrycon ericae is distinguished from H. wosiackii by presenting a humeral spot vertically elongated, with an overall appearance of an arrow, instead of an anteriorly rounded humeral spot. 

scholarly journals Two new species of Isbrueckerichthys Derijst, 1996 (Siluriformes: Loricariidae) from the rio Paranapanema basin, Brazil

Zootaxa ◽  
2006 ◽  
Vol 1372 (1) ◽  
pp. 53 ◽  
Author(s):  
FERNANDO C. JEREP ◽  
OSCAR A. SHIBATTA ◽  
EDSON H.L. PEREIRA ◽  
OSVALDO T. OYAKAWA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Exposed Surface ◽  
Caudal Peduncle ◽  
Anterior Portion ◽  
Strongly Convex ◽  
Two New Species ◽  
Peduncle Length ◽  
Superior Portion ◽  
Entire Margin

Two new Isbrueckerichthys species from Paranapanema river basin are described, I. saxicola and I. calvus, respectively from ribeirão Jacutinga and rio Taquara affluents. Both species present all diagnostic characters of the genus, and differ from their congeners by having bicuspid teeth (vs. simple teeth in I. alipionis), hypertrophied odontodes along the lateral margin of head (vs. hypertrophied odontodes only at the anterior portion of snout in I. epakmos) and longer pectoral-fin spine and shorter caudal peduncle length in relation to I. duseni. The new species can be distinguished from each other by number of odontodes in each minute abdominal platelet (more than six in I. saxicola vs. at most six in I. calvus); by the presence of a plated area under the three first plates of the lateral line in I. saxicola vs. its absence in I. calvus in which this region is naked; by a exposed portion of cleithrum bordering the entire margin of the opercular opening in I. saxicola vs. bordering just the superior portion in I. calvus; and by presenting the exposed surface of supraoccipital plain or slightly convex in I. saxicola vs. strongly convex with an area without odontodes on the center in I. calvus.

Two new species of Tomentella (Thelephorales, Basidiomycota) from Lesser Xingan Mts., northeastern China

Phytotaxa ◽  
2018 ◽  
Vol 369 (2) ◽  
pp. 80 ◽  
Author(s):  
XU LU ◽  
YAN-HONG MU ◽  
HAI-SHENG YUAN
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Maximum Likelihood ◽  
Morphological Characteristics ◽  
Northeastern China ◽  
Phylogenetic Position ◽  
Closely Related Species ◽  
Molecular Analyses ◽  
Two New Species ◽  
Molecular Phylogenetic

Two new species of Tomentella from the Lesser Xingan Mts. of northeastern China, T. pallidocastanea and T. tenuirhizomorpha, are described and illustrated using morphological characteristics and molecular phylogenetic analysis. T. pallidocastanea is characterized by mucedinoid basidiocarps adherent to the substrate, a light reddish brown to pinkish grey hymenophoral surface, absence of rhizomorphs and cystidia, generative hyphae with clamps, rarely with simple septa and echinulate, and subglobose to lobed basidiospores (echinuli up to 1.5 μm long). T. tenuirhizomorpha is characterized by mucedinoid basidiocarps separable from the substrate, a greyish brown to dark brown hymenophoral surface, thin rhizomorphs in the subiculum and margins, an absence of cystidia, generative hyphae with clamps rarely with simple septa and echinulate, and subglobose to globose basidiospores (echinuli up to 1.5 μm long). Molecular analyses using Maximum Likelihood, Maximum Parsimony and Bayesian Analysis confirm the phylogenetic position of the two new species. The discriminating characters of these two new species and their closely related species are discussed in this study.

scholarly journals The genus Peckoltia with the description of two new species and a reanalysis of the phylogeny of the genera of the Hypostominae (Siluriformes: Loricariidae)

Zootaxa ◽  
2008 ◽  
Vol 1822 (1) ◽  
pp. 1 ◽  
Author(s):  
JONATHAN W. ARMBRUSTER
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Original Description ◽  
Color Pattern ◽  
The Body ◽  
The Other ◽  
Caudal Fin ◽  
Two New Species ◽  
Fin Spines ◽  
Pelvic Fin

Peckoltia contains 12 described species, eight of which are considered valid. Peckoltia arenaria, P. filicaudata, and P. ucayalensis are recognized as synonyms of P. bachi and P. kuhlmanni is recognized as a synonym of P. vittata. In addition, two new species are described. The type species of Peckoltichthys and Sophiancistrus are synonyms of P. bachi and both genera are recognized as junior synonyms of Peckoltia. The species of Peckoltia range throughout much of the Amazon basin, the upper Orinoco, the upper Essequibo, and perhaps the Maroni, and can be identified from most other ancistrins by having dentaries that form angle of 90° or less and from others with angled dentaries by lacking the synapomorphies of those genera. The species of Peckoltia vary from one another mostly in coloration. Peckoltia braueri, P. caenosa n. sp., P. cavatica and P. vittata lack spots on the head while the other species have them. Peckoltia braueri and P. cavatica have orange bands in the dorsal and caudal fins and have the bones and plates of the head and nape outlined in black (vs. no orange bands and head plates and bones not outlined in black in P. caenosa and P. vittata). Peckoltia caenosa has a color pattern consisting of dark vermiculations on the head and abdomen (vs. saddles or blotches on the head and faint dark spots on the abdomen in P. vittata). Among the species with spots on the head, P. lineola n. sp. and P. vermiculata have some of the spots combining to form vermiculations (vs. spots free in P. bachi, P. brevis, P. furcata, and P.oligospila) with the vermiculations larger than the pupil in P. lineola and narrower in P. vermiculata and the vermiculations radiating from a central point in P. vermiculata vs. no such pattern in P. lineola. Peckoltia bachi can be identified from the other species by having widened pelvic-fin spines that can be pulled ventrally such that they are completely ventral and parallel to the body (vs. pelvic-fin spines narrow and cannot be adducted ventral to body) and by having the eye low on the head (vs. high). Peckoltia brevis can be identified from P. furcata and P. oligospila by having well-developed dorsal saddles (vs. saddles faint), no spots on the body behind the nape (vs. spots generally present behind the nape); from P. oligospila by having bands in the caudal fin (vs. spots); and from P. furcata by having the lower caudal-fin spine longer than the upper (vs. upper spine longer). Peckoltia furcata can be identified from P. oligospila by having the upper caudal-fin spine longer than the lower (vs. lower spine longer) and by having bands in the caudal fin (vs. spots). Ancistrus yaravi had been recognized as a species of Peckoltia. The type of A. yaravi is lost, but the original description suggests that the species is the senior synonym of Neblinichthys roraima. A revised morphological phylogeny demonstrates the lack of support for Peckoltia and Hemiancistrus as monophyletic, and phenetic definitions are provided for the two genera. The phylogeny also demonstrates a lack of support of the genus Watawata.

Two new species of Curculionichthys (Siluriformes: Loricariidae) from the rio Amazonas basin, Brazil

Zootaxa ◽  
2017 ◽  
Vol 4341 (2) ◽  
pp. 258 ◽  
Author(s):  
FÁBIO F. ROXO ◽  
ANGELICA C. DIAS ◽  
GABRIEL S. C. SILVA ◽  
CLAUDIO OLIVEIRA
Keyword(s):  
New Species ◽  
Distal Portion ◽  
The Body ◽  
Caudal Peduncle ◽  
Diagnostic Features ◽  
Lower Lip ◽  
Two New Species ◽  
Dorsal Portion ◽  
In Series ◽  
Lateral Portion

In the present study, we describe two new species of Curculionichthys from rio Tapajós and rio Tocantins basins in Brazil. Both species present all diagnostic features of Curculionichthys. Furthermore, both species C. tukana and C. itaim are distinguished from congeners by the combination of seven characters: (1) a higher number of plates in abdominal lateral plates series; (2) the absence of large conspicuous odontodes forming rows on head and trunk; (3) the anterior profile of the head pointed; (4) a higher number of dentary teeth; (5) the lack of contrasting dark spots at the anterodorsal region of body; (6) the absence of an irregular concentration of chromatophores that entirely cover the anal-fin origin and adjacent region, and distal portion of the first unbranched anal-fin ray; and (7) the presence of odontodes forming aligned rows, more evident in the dorsal portion of head and in the lateral portion of caudal peduncle. Furthermore, C. tukana can be further distinguished from congeners by three characters: (1) the papillae aligned in series that extends from the distal portion of lower lip to dentary; (2) the absence of dark-brown spots scattered over the body; and (3) a higher number of maxillary teeth. The species C. itaim also can be further distinguished from congeners by five characters: (1) the papillae randomly distributed throughout the lower lip; (2) a smaller number of medial plates series on lateral portion of the body following the lateral line; (3) a smaller number of median plates series in abdomen; (4) the absence of dark-brown spots scattered over the body; and (5) the absence of one unpaired platelet on the dorsal portion of the caudal peduncle. 

scholarly journals Two new species of the Glyptosternine catfish genus Euchiloglanis (Teleostei: Sisoridae) from southwest China with redescriptions of E. davidi and E. kishinouyei

Zootaxa ◽  
2011 ◽  
Vol 2871 (1) ◽  
pp. 1 ◽  
Author(s):  
WEI ZHOU ◽  
XU LI ◽  
ALFRED W. THOMSON
Keyword(s):  
New Species ◽  
Yangtze River ◽  
Pectoral Fin ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Upper Yangtze River ◽  
Two New Species ◽  
Adipose Fin ◽  
The Upper Yangtze River ◽  
Pelvic Fin

Two new species of the sisorid catfish genus Euchiloglanis are described from the upper Yangtze River and the upper Black River drainage (Red River basin) in China. Euchiloglanis longibarbatus n. sp. from the upper Yangtze River differs from E. davidi, E. kishinouyei and E. longus n. sp. by having an elongate and threadlike maxillary barbel with a pointed tip reaching posteriorly to beyond the gill opening. It differs from E. dorsoarcus by having the anal-fin origin closer to the caudal-fin base than to the pelvic-fin origin, and from E. phongthoensis by having the anus located midway between the pelvic-fin insertion and the anal-fin origin. Euchiloglanis longus n. sp. from the upper Black River drainage differs from E. davidi by having the length of the pectoral fin equal to 78.4–89.5% of the distance between the origins of the pectoral and pelvic fins, and from E. kishinouyei and E. longibarbatus n. sp. by having the distance between the origins of the pelvic and anal fins equal to 108.9–140.6% of the distance between the origins of the pectoral and pelvic fins. It further differs from E. davidi, E. kishinouyei, and E. longibarbatus n. sp. by having the depth of the caudal peduncle equal to 14.1–27.0% of the length of the caudal peduncle. It differs from E. dorsoarcus by having the anal-fin origin closer to the caudal-fin base than to the pelvic-fin origin, and from E. phongthoensis by having the distance from the adipose-fin origin to the dorsal-fin insertion equal to about 50% of the adipose-fin base length. Euchiloglanis davidi and E. kishinouyei are redescribed from recently collected specimens from their type localities. A lectotype is designated for E. davidi and a neotype designated for E. kishinouyei. Euchiloglanis kishinouyei is distinguished from E. davidi by lacking an indentation in the premaxillary tooth band, by having the length of the pectoral fin equal to 75.5–89.6% of the distance between the insertions of the pectoral and pelvic fins, and by having the distance between the insertion of the pelvic-fin and the anus equal to 81.5–97.5% of the distance between the insertions of the pectoral and pelvic fins. A key to the species of is Euchiloglanis also provided.

scholarly journals Two new species of Leporinus Agassiz, 1829 from Araguaia-Tocantins system, Amazon basin, Brazil (Ostariophysi, Anostomidae)

2009 ◽  
Vol 69 (1) ◽  
pp. 109-116 ◽  
Author(s):  
JC. Garavello ◽  
GM. Santos
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Amazon Basin ◽  
Cutting Edge ◽  
Meristic Characters ◽  
Caudal Peduncle ◽  
Transversal Line ◽  
Dorsal Fin ◽  
Two New Species ◽  
Adipose Fin

Two new species of genus Leporinus from the Araguaia-Tocantins system, Amazon, Brazil, are described. Leporinus unitaeniatus n. sp. is distinguished from the remaining species of this genus by the presence of a conspicuous longitudinal dark brown bar along the lateral line on the flanks, and Leporinus geminis n. sp. is distinguished by an inconspicuous dark bar combined with three large and vertically elongated brown blotches on the trunk; the first on the dorsal fin region, the second anterior to the adipose fin and the third on the caudal peduncle. Both are medium-sized species of the genus (up to 150 mm SL) and share the following combination of meristic characters: 4 teeth on each premaxillary and dentary; 40-43 scales in the lateral line, 6/I/5 scales on the transversal line, and 16 series of scales around the caudal peduncle. L. unitaeniatus n. sp. has a sub-terminal mouth and tooth series formed by incisive-like elongated teeth frontally turned and with only a straight cutting edge decreasing in size like the steps of stairs from the teeth pair of symphysis. Leporinus geminis n. sp. has a sub-inferior mouth and the tooth series shaped by large incisive-like teeth forming an arched cutting edge, decreasing in size from the symphysal pair of teeth.

Moenkhausia restricta, a new species from the upper Rio Negro, Amazon basin, northwestern Brazil (Characiformes: Characidae)

Zootaxa ◽  
2019 ◽  
Vol 4700 (4) ◽  
pp. 487-493 ◽  
Author(s):  
NATHÁLIA C. SOARES ◽  
RICARDO C. BENINE
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Amazon Basin ◽  
Color Pattern ◽  
Distal Margin ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Rio Negro ◽  
A New Species ◽  
Pelvic Fin

A new shallow-bodied species of Moenkhausia is described from the upper Rio Negro, Amazon basin, Brazil. The new species is diagnosed from all congeners by the combination of a body depth not surpassing 33% in SL in adult specimens, seven scale rows between dorsal-fin origin and lateral line, five scale rows between pelvic-fin insertion and lateral line, a single conspicuous vertically elongated humeral blotch, and a conspicuous caudal peduncle blotch extending to the distal margin of the median caudal-fin rays. The new species was collected together with Jupiaba zonata, with which it shares a very similar color pattern. The similarity between these two taxa is interpreted as an additional case of Batesian mimicry between Moenkhausia and Jupiaba. 

scholarly journals Two new catfish species of typically Amazonian lineages in the Upper Rio Paraguay (Aspredinidae: Hoplomyzontinae and Trichomycteridae: Vandelliinae), with a biogeographic discussion

2021 ◽  
Vol 61 ◽  
pp. e20216147
Author(s):  
Fernando Cesar Paiva Dagosta ◽  
Mário César Cardoso De Pinna
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Alternative Explanation ◽  
The Other ◽  
River Systems ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Two New Species ◽  
Pectoral Spine ◽  
Pelvic Fin

Two new species of particular biogeographic significance are described from the upper rio Paraguay basin, one of the genus Paracanthopoma (Trichomycteridae, Vandelliinae) and the other of the genus Ernstichthys (Aspredinidae, Hoplomyzontinae). The two species occur sympatrically in the Rio Taquarizinho, tributary of the Rio Taquari, in the upper Paraguay system. Paracanthopoma saci is distinguished from its only congener, P. parva, by a spatulate caudal peduncle; a minuscule premaxillary dentition (reduced to three delicate teeth); the supraorbital latero-sensory canals opening as two separate s6 pores; the caudal fin slightly convex or truncate with round edges; the skull roof entirely open, unossified; the origins of dorsal and anal fins approximately at same vertical; and the pelvic fin with three rays. Ernstichthys taquari is diagnosed among congeners by the narrow bony shields on dorsal and ventral series, not overlapping or contacting each other; by the presence of seven or eight serrations on the posterior margin of the pectoral spine; and by the pectoral-fin spine only slightly larger than subsequent soft rays. Both Paracanthopoma and Ernstichthys were previously unknown outside of the Greater Amazonian river systems (Amazon, Orinoco, Essequibo and smaller surrounding drainages). Their presence restricted to the Rio Taquari is unexpected and suggests a peculiar biogeographical history. Ancestral geographic distributions were reconstructed using S-DIVA and BBM methods in RASP. A majority of resulting hypotheses support that the two species reached the Paraguay from the Amazon. The alternative explanation accounts for their presence in the Paraguay by vicariant events. In no case, their presence in the Paraguay is an ancestral distribution with subsequent Amazonian dispersal. Though unusual, this pattern is also seen in a few other fish taxa, showing that the Rio Taquari is biogeographically hybrid, combining elements from both the Paraguay and Amazon drainages.

scholarly journals A new species of Moenkhausia Eigenmann (Characiformes: Characidae) from the rio Xingu basin, Brazil

2010 ◽  
Vol 8 (3) ◽  
pp. 655-659 ◽  
Author(s):  
Manoela M. F. Marinho
Keyword(s):  
New Species ◽  
Caudal Peduncle ◽  
Anterior Portion ◽  
Longitudinal Stripe ◽  
Longitudinal Band ◽  
Horizontal Septum ◽  
Fin Rays ◽  
Dark Pigmentation ◽  
A New Species ◽  
Pelvic Fin

A new species of Moenkhausia from the upper rio Xingu basin is described. Moenkhausia eurystaenia is distinguished from all congeners, except M. heikoi and M. phaeonota, by the presence of a dark, broad longitudinal stripe from the opercle to the end of caudal peduncle. The new species is distinguished from M. heikoi mainly by having 18-21 branched anal-fin rays (vs. 24-26) and the absence of a round blotch at the end of the caudal peduncle (vs. present). Moenkhausia eurystaenia can be distinguished from M. phaeonota mainly by the anterior portion of longitudinal band darker at horizontal septum (vs. darker below horizontal septum), the deep dark pigmentation along horizontal septum extending anteriorly up to humeral region (vs. extending up to vertical through pelvic-fin origin), number of vertebrae 34 (vs. 36-37), and others additional measurements.

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