Rivulus sape, a new species of killifish (Cyprinodontiformes: Rivulidae) from the Paragua River system, Caroní River drainage, Guyana Shield, Venezuela

A new species, Rivulus sape, is described from two tributaries of the upper Paragua River, Caroní River drainage, of the Guyana Shield in Venezuela. It is a small (all specimens examined less than 50 mm SL), apparently non-annual species that is distinguished from congeners in having the dorsal, anal, and pelvic fins short; adult males with a truncate caudal fin with the upper and lower borders black; and an iridescent blue, ovate spot on sides of the body above the pectoral fins. Neither adults nor juveniles have an ocellus at the dorsal junction of the caudal peduncle and caudal fin. Only one contact organ per scale on some scales along the sides of the body was observed.

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Hemiodus jatuarana, a new species of Hemiodontidae from the rio Trombetas, Amazon Basin, Brazil (Teleostei, Characiformes)

Zootaxa ◽

10.11646/zootaxa.546.1.1 ◽

2004 ◽

Vol 546 (1) ◽

pp. 1 ◽

Cited By ~ 4

Author(s):

FRANCISCO LANGEANI

Keyword(s):

New Species ◽

Amazon Basin ◽

Branchial Arch ◽

The Body ◽

Dark Spot ◽

Gill Rakers ◽

Caudal Peduncle ◽

Caudal Fin ◽

Dark Pigmentation ◽

A New Species

Hemiodus jatuarana, a new species of the Hemiodontidae from Oriximin , rio Trombetas, Amazon Basin, Brazil, is described. The new species can be readily distinguished from its congeners by the presence of a horizontally elongated dark spot on the caudal peduncle, and by the absence of any other dark pigmentation pattern on the body. Hemiodus jatuarana is readily separated from H. immaculatus, another species without dark pigmentation on the body, by having 25 27 epibranchial and 36 37 ceratobranchial gill rakers on the first branchial arch, and caudal-fin lobes without longitudinal stripes, vs. 14 16 and 21 25 gill rakers, and a conspicuous longitudinal stripe on each caudal-fin lobe in H. immaculatus. The new species is only known from its type-locality, where it cooccurs with H. immaculatus.

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A new species of Moenkhausia Eigenmann (Characiformes: Characidae) from the upper rio Machado at Chapada dos Parecis, rio Madeira basin, Brazil

Neotropical Ichthyology ◽

10.1590/1982-0224-20150041 ◽

2016 ◽

Vol 14 (1) ◽

Cited By ~ 2

Author(s):

William M. Ohara ◽

Manoela M. F. Marinho

Keyword(s):

New Species ◽

The Body ◽

Caudal Peduncle ◽

Anterior Portion ◽

Caudal Fin ◽

Fin Rays ◽

Blue Eyes ◽

A New Species ◽

Rio Madeira

ABSTRACT A new species of Moenkhausia is described from the upper rio Machado at Chapada dos Parecis, rio Madeira basin, Rondônia State, Brazil. Among congeners, the new species is similar to Moenkhausia chlorophthalma, M. cotinho , M. lineomaculata , M. plumbea, and M. petymbuaba by having dark blotches on the anterior portion of the body scales, which are absent in the remaining species of the genus. The new speciesdiffers from aforementioned species by possessing blue eyes in life, 15-18 branched anal-fin rays, and a well-defined, round caudal-peduncle spot that does not reach the upper and lower margins of the caudal peduncle and does not extend to the tip of the middle caudal-fin rays.

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

Zootaxa ◽

10.11646/zootaxa.3586.1.26 ◽

2012 ◽

Vol 3586 (1) ◽

pp. 272 ◽

Cited By ~ 2

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.

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Gephyrocharax torresi (Characiformes: Characidae: Stevardiinae), a new species from the río Cascajales basin, río Magdalena system, Colombia

Neotropical Ichthyology ◽

10.1590/s1679-62252013000200005 ◽

2013 ◽

Vol 11 (2) ◽

pp. 275-284 ◽

Cited By ~ 6

Author(s):

James Anyelo Vanegas-Ríos ◽

María de las Mercedes Azpelicueta ◽

Juan Marcos Mirande ◽

María Dolly García Gonzales

Keyword(s):

New Species ◽

The Body ◽

Pectoral Fin ◽

Caudal Peduncle ◽

Caudal Fin ◽

Fin Ray ◽

Fin Rays ◽

Adipose Fin ◽

Black Pigmentation ◽

A New Species

A new species of Gephyrocharax is described from the río Cascajales basin, a tributary of the río La Colorada, río Magdalena system, Colombia. The new species is distinguished from its congeners, exceptG. melanocheir, by the absence of an adipose fin in most specimens and by the possession of a lateral branched pectoral-fin ray in males with a distal fan-shaped structure with minute bony hooks and a dark blotch or a few scattered dark brown chromatophores along its branches. The new species differs from G.melanocheir by the absence of an intense black pigmentation at the base of the anterior five dorsal-fin rays, the number of vertebrae (40-41vs. 38-39), the frontals contacting each other anterior to the epiphyseal bar in adults (vs. the absence of contact), the posterior margin of the mesethmoid straight in its central portion (vs. strongly concave at this point), the pouch scale of mature males reaching caudal-fin ray 11 or the area between caudal-fin rays 11 and 12 (vs. reaching only to caudal-fin ray 10 or the area between caudal-fin rays 9 and 10), the number of minute terminal branches of the lateral branched pectoral-fin ray of mature males (60-88 vs. 28-54), a longer black lateral stripe along the body in males (reaching to the base of the caudal-fin rays vs. reaching the middle of the length of the caudal peduncle), and the snout length (28.3-31.8% HLvs. 22.2-28.0% HL). The diagnosis ofGephyrocharax is modified to include species with the adipose fin variably present

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A new rainbowfish (Teleostei: Melanotaenioidei: Bedotiidae) from the southeastern highlands of Madagascar, with comments on the biogeography of Bedotia

Zootaxa ◽

10.11646/zootaxa.1051.1.4 ◽

2005 ◽

Vol 1051 (1) ◽

pp. 39 ◽

Cited By ~ 3

Author(s):

JOHN S. SPARKS ◽

LEILA M.R. RUSH

Keyword(s):

New Species ◽

Adult Males ◽

Drainage Basins ◽

Caudal Fin ◽

River Drainage ◽

Dorsal Fin ◽

Bright Yellow ◽

Small Streams ◽

A New Species

Bedotia albomarginata, a new species of Malagasy rainbowfish, is described from forested habitats in the southeastern highlands of Madagascar. The new species is distinguished from congeners by the presence of broad white margins on the second dorsal fin and anal fin in males, a markedly lanceolate caudal fin in adult males, and in life, by a bright yellow to orangish-red anal fin in both sexes. Bedotia albomarginata is known only from small streams and swamps within the upper to middle reaches of the Mananara and Rienana river drainage basins.

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A new species of Pachyurus Agassiz 1831 (Teleostei: Perciformes: Sciaenidae) from the Río Napo basin, Eastern Ecuador

Zootaxa ◽

10.11646/zootaxa.38.1.1 ◽

2002 ◽

Vol 38 (1) ◽

pp. 1 ◽

Cited By ~ 2

Author(s):

LILIAN CASATTI ◽

NING LABBISH CHAO

Keyword(s):

New Species ◽

Lateral Surface ◽

The Body ◽

Caudal Peduncle ◽

Caudal Fin ◽

Longitudinal Stripe ◽

Dorsal Fin ◽

Coloration Pattern ◽

A New Species

A new species of Neotropical freshwater sciaenid, Pachyurus stewarti, is described from the Río Napo basin, Ecuador. The new species is readily distinguishable from its congeners by having a unique coloration pattern of about twelve brownish vertical oval blotches and bars on the lateral surface of the body from the opercle to the caudal peduncle, and a longitudinal stripe which starts below the soft dorsal-fin base and extends along the mid-line of the caudal peduncle to the base of the caudal fin.

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Hyphessobrycon natagaima (Characiformes: Characidae) a new species from Colombia, with a key to the Magdalena Basin Hyphessobrycon species

Caldasia ◽

10.15446/caldasia.v37n1.51228 ◽

2015 ◽

Vol 37 (1) ◽

pp. 221 ◽

Cited By ~ 2

Author(s):

Carlos A. García-Alzate ◽

Donald C. Taphorn ◽

Cesar Roman-Valencia ◽

Francisco A. Villa-Navarro

Keyword(s):

New Species ◽

River Basin ◽

Lateral Line ◽

Caudal Peduncle ◽

Caudal Fin ◽

Pectoral Fins ◽

Fin Rays ◽

Magdalena River ◽

A New Species ◽

Pelvic Fin

<p>A new species, Hyphessobrycon natagaima, is described from the upper Magdalena River Basin in Colombia. It differs from all other species of Hyphessobrycon with a dark lateral stripe inhabiting the Magdalena River Basin: H. poecilioides, H. proteus and H. ocasoensis, by having eight to twelve pored lateral-line scales (vs. 14-26); four scales between the lateral line and the pelvic-fin insertions (vs. five or six); one tooth on the maxilla (vs. zero in H. poecilioides, and two to five in H. proteus; except H. ocasoensis, with one), a dark, interrupted, lateral stripe that is not in contact with the caudal peduncle spot (vs. absence of caudal spot in H. poecilioides, lateral stripe continued that is in contact with the caudal peduncle spot in H. ocasoensis). It has a rhomboid shaped caudal-peduncle spot that continues on to middle caudal-fin rays (vs. absence of caudal peduncle spot in H. poecilioides and caudal peduncle spot round and not continued on to middle caudal-fin rays in H. ocasoensis); and presence of hooks on all fins in mature males (vs. males with hooks on anal, pelvic and pectoral fins). Hyphessobrycon natagaima differs from H. ocasoensis, in addition to the above characters, by having four scale rows between the lateral line and the anal-fin origin (vs. six); three or four scale rows between the lateral line and the pelvic-fin insertions (vs. six); ten or eleven predorsal scales (vs. nine); i,9,i dorsal-fin rays (vs. ii,8,i); 18-20 branched anal-fin rays (vs. 21-22) and eleven branched pectoral-fin rays (vs. twelve). A key for the identification of Hyphessobrycon species present in the Magdalena River Basin is provided.</p>

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Description of a new species of Bush frog (Anura: Rhacophoridae: Raorchestes) from northwestern Yunnan, China

Zootaxa ◽

10.11646/zootaxa.4941.2.5 ◽

2021 ◽

Vol 4941 (2) ◽

pp. 239-258

Author(s):

YUN-HE WU ◽

XIAO-LONG LIU ◽

WEI GAO ◽

YU-FAN WANG ◽

YING-CHUN LI ◽

...

Keyword(s):

New Species ◽

Southern China ◽

Field Work ◽

The Body ◽

Adult Males ◽

The Past ◽

Black Region ◽

One New Species ◽

A New Species ◽

Northwestern Yunnan

Approximately half of the species in speciose genus Raorchestes were described during the past 10 years, yet only 11 species are known from Southeast Asia and southern China (SEA-SC), adjacent Himalayas, and northeastern India. Field work in northwestern Yunnan province, China resulted in the discovery of one new species in the genus based on morphological and molecular analyses. The new species is diagnosed by small size with 15.0–19.0 mm SVL in adult males (n=3); tongue pyriform, notched posteriorly; rudimentary webbing between toes; fingers and toes with narrow lateral dermal fringes; tibiotarsal articulation reaching anterior of the eye when hindlimb is stretched along the side of the body; relative finger lengths: I < II < IV < III, relative toe lengths: I < II < V < III < IV; inner metatarsal tubercle oval, outer metatarsal tubercle absent; finger discs and toe discs greyish or orange; flank near the crotch with a distinct black region between two creamy white patches, and the thigh having a similar black patch near the groin, proximal to another creamy white patch; a distinct “) (”-shaped dark marking on the back; male with external single subgular vocal sac; nuptial pad absent. A phylogenetic tree was reconstructed based on the mitochondrial genes for 16S rRNA and ND1. The results indicated that these individuals form a monophyletic group, and show high genetic divergence to their closest relatives within the genus (uncorrected p-distances > 3.2%) by distance of 16S comparable to the divergence between recognized Raorchestes species. This study further enriches the diversity of rhacophorids, especially in northwestern Yunnan.

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A new species of Characidium (Characiformes: Crenuchidae) from small coastal drainages in northeastern Brazil, with remarks on the pseudotympanum of some species of the genus

Neotropical Ichthyology ◽

10.1590/1982-0224-20130168 ◽

2014 ◽

Vol 12 (2) ◽

pp. 333-342 ◽

Cited By ~ 7

Author(s):

Angela M. Zanata ◽

Priscila Camelier

Keyword(s):

New Species ◽

Lateral Line ◽

The Body ◽

Northeastern Brazil ◽

Horizontal Scale ◽

Caudal Peduncle ◽

Transversal Line ◽

Lateral Band ◽

The Family ◽

A New Species

Characidium samurai, a species of the family Crenuchidae apparently endemic to rio das Almas and rio Vermelho basins, Bahia, Brazil, is described. The new species is readily distinguishable from its congeners, except C. lanei, by having a dark lateral band along the head and body that is particularly broad from the rear of the head to the end of the caudal peduncle (1.5 or 2 scales wide) and by the absence of dark bars or blotches on the ventral half of the body. Characidium samurai differs from C. laneiby having the lateral band with straight borders overall (vs.lateral band with somewhat irregular borders due to blotches extending dorsally or ventrally), anal fin ii,7-8 (vs. ii,6), and 4 horizontal scale rows above the lateral line and 4 below (vs. 5/3). It further differs from congeners by a series of features, including isthmus completely covered by scales, lateral line complete with 34-37 perforated scales, 9 scales on the transversal line, 14 scale rows around the caudal peduncle, anal fin ii,7-8, and the absence of dark bars or spots on the fins, except by a faded dorsal-fin bar. The presence of pseudotympanum in four species of Characidium is discussed.

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Poecilia (Pamphorichthys) akroa, a new poeciliid species (Cyprinodontiformes: Poeciliidae) from the Rio Tocantins basin, Brazil

Zootaxa ◽

10.11646/zootaxa.4464.3.9 ◽

2018 ◽

Vol 4461 (3) ◽

pp. 438

Author(s):

CARLOS AUGUSTO FIGUEIREDO ◽

CRISTIANO R. MOREIRA

Keyword(s):

New Species ◽

Sensory System ◽

Color Pattern ◽

Distal Portion ◽

The Body ◽

Caudal Peduncle ◽

Posterior Portion ◽

Anterior Branch ◽

Black Blotch ◽

A New Species

A new species, Poecilia (Pamphorichthys) akroa, is described from the Rio Tocantins drainage, Brazil. The new species differs from the remaining species of the genus by the possession of 10 or 11 pectoral-fin rays, entire preopercular ramus and posterior portion of the supraorbital ramus of the cephalic sensory system enclosed in canals, a faint longitudinal band along the body, a single gonapophysis, a homogeneous reticulate color pattern on sides of body, urogenital region of females heavily pigmented, distalmost segments of the anterior branch (4a) of the fourth gonopodial ray fused into an elongated segment turned anteriorly, subdistal segments of anterior branch (5a) of fifth gonopodial ray simple, without anterior (ventral) projections, dorsal fin with pigmentation at its distal portion and with a basal black blotch, and chromatophores more concentrated on the posterior margin of the mid-ventral scale series of the caudal peduncle and ventrolateral margin of the adjacent scales forming a series of rhombi posterior to anal fin.

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