scholarly journals Two new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the rio Madeira basin, Brazil

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Luiz Fernando Caserta Tencatt ◽  
Willian Massaharu Ohara
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Ventral Surface ◽  
Anterior Portion ◽  
Dorsal Fin ◽  
Black Spots ◽  
Coloration Pattern ◽  
Two New Species ◽  
Black Blotch ◽  
Rio Madeira

Abstract Two new species of Corydoras are described from the rio Madeira basin, Brazil. The intermediate long-snouted new species can be distinguished from its congeners by presenting the following combination of features: posterior margin of dorsal-fin spine with laminar serrations directed towards the origin of the spine; presence of two longitudinal black stripes on flanks; anterior portion of dorsal fin with sparse black chromatophores, not forming any conspicuous pattern; absence of a conspicuous black marbled coloration pattern on head; black spots on caudal fin, some spots arranged, forming transversal bars; and brownish dorsal-fin spine. The short-snouted new speciescan be distinguished from its congeners by the following combination of features: short mesethmoid; posterior laminar expansion of infraorbital 2 very reduced, not in contact with compound pterotic; two or three longitudinal black stripes on flanks; absence of an oblique or vertical black blotch across the eye; anterior portion of dorsal fin with sparse black chromatophores, not forming any conspicuous pattern; and ventral surface of trunk naked or covered by sparse platelets.

scholarly journals A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Luiz Fernando Caserta Tencatt ◽  
Hans-Georg Evers
Keyword(s):  
New Species ◽  
Anterior Portion ◽  
Black Stripe ◽  
Dorsal Fin ◽  
Madre De Dios ◽  
Black Spots ◽  
Black Blotch ◽  
Pectoral Spine ◽  
Black Pigmentation ◽  
A New Species

ABSTRACT A new species of Corydoras is described from the río Madre de Dios basin, Peru. The new species can be distinguished from its congeners by presenting the following features: a longitudinal black stripe along midline of flank; mesethmoid short, with anterior portion poorly developed; serrations on posterior margin of pectoral spine directed towards the tip of the spine; dorsal fin with the region of the first branched ray, including membrane, with concentration of black pigmentation, the remaining areas with irregular black blotches; absence of a vertically elongated black blotch across the eyes; conspicuously rounded moderately-developed black spots on the snout; and ventral expansion of infraorbital 1 moderately developed.

scholarly journals Revisionary study of the armored catfish Corydoras paleatus (Jenyns, 1842) (Siluriformes: Callichthyidae) over 180 years after its discovery by Darwin, with description of a new species

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Luiz Fernando Caserta Tencatt ◽  
Marcelo Ribeiro de Britto ◽  
Carla Simone Pavanelli
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Unique Combination ◽  
Southern Brazil ◽  
Anterior Portion ◽  
Dorsal Fin ◽  
Black Spots ◽  
Coastal Rivers ◽  
Pectoral Spine ◽  
A New Species

ABSTRACT The taxon known as Corydoras paleatus carries one of the most complex taxonomic histories among Corydoradinae catfishes. A comprehensive review of specimens attributed to that species from several localities was carried out, allowing the clear recognition of C. paleatus and also of a new species previously misidentified as C. paleatus , described herein. Corydoras paleatus can be distinguished from its congeners by presenting the following unique combination of features: perpendicularly directed serrations along entire posterior margin of the pectoral spine; three large black blotches along midline of flank; hyaline or black pectoral fin; and transversal black bars on caudal-fin lobes. Corydoras paleatus is known from the lower rio Paraná basin, coastal rivers from Southern Brazil and Uruguay and rio Uruguai basin. The new species can be distinguished from its congeners by having the following unique combination of features: three large black blotches along midline of flank; three nasal pores; mesethmoid short; infraorbital 2 not in contact with compound pterotic; striated black spots from the snout tip to nuchal plate region; markedly rounded snout; and anterior portion of dorsal fin spotted. The new species is known from the upper rio Uruguai basin, from the rivers Canoas, do Peixe and Pelotas.

scholarly journals Two new species of Hyphessobrycon (Teleostei: Characidae) from upper rio Tapajós basin on Chapada dos Parecis, central Brazil

2006 ◽  
Vol 4 (3) ◽  
pp. 301-308 ◽  
Author(s):  
Tiago Pinto Carvalho ◽  
Vinicius Araújo Bertaco
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Caudal Fin ◽  
Mato Grosso ◽  
Central Brazil ◽  
Dorsal Fin ◽  
Two New Species ◽  
Fin Rays ◽  
Black Band

Two new species of Hyphessobrycon are described from the upper rio Tapajós basin, Mato Grosso, Brazil. Hyphessobrycon melanostichos is distinguished from its congeners by the combination of a conspicuous longitudinal broad black band beginning on the posterior margin of orbit and reaching the tip of middle caudal fin rays, a distinct vertically elongate humeral spot, and 16 to 18 branched anal-fin rays. Hyphessobrycon notidanos is distinguished from its congeners by the combination of an elongate dorsal fin in mature males, a vertically elongate humeral spot, 2-4 maxillary teeth, iii,8 dorsal-fin rays, and 16 to 21 branched anal-fin rays.

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. 

Barbus niluferensis, a new species of barbel (Teleostei: Cyprinidae) from Nilüfer River, Turkey, with re-description of B. oligolepis

Zootaxa ◽  
2009 ◽  
Vol 1981 (1) ◽  
pp. 15-28 ◽  
Author(s):  
DAVUT TURAN ◽  
MAURICE KOTTELAT ◽  
F. GÜLER EKMEKÇİ
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Slender Body ◽  
Valid Species ◽  
Marmara Sea ◽  
Dorsal Fin ◽  
Proximal Half ◽  
Black Spots ◽  
Fin Ray ◽  
A New Species

Barbus niluferensis, new species, is described from the Nilüfer River, Marmara Sea drainage, Turkey. It is distinguished by a weaker last simple dorsal-fin ray, serrated along the proximal half of its posterior margin, a maximum known size of 146 mm SL, a slender body, a short head, a short caudal fin, and larger irregular black blotches on the back and the flanks, and small black spots on the head, extending downwards to the cheeks. Barbus oligolepis Battalgil, 1941, is a valid species known from the rivers draining to the southern shore of the Marmara Sea.

Two new species of the genus Chelidoperca (Perciformes: Serranidae) from the Andaman Sea, eastern Indian Ocean

Zootaxa ◽  
2021 ◽  
Vol 4927 (1) ◽  
pp. 87-103
Author(s):  
PETER N. PSOMADAKIS ◽  
OFER GON ◽  
THAUNG HTUT
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Ventral Surface ◽  
Andaman Sea ◽  
Distal Margin ◽  
Black Stripe ◽  
Dorsal Fin ◽  
Proximal Half ◽  
Lower Jaw ◽  
Two New Species

Two new species of the genus Chelidoperca are described from specimens collected in 2015 and 2018 from the Andaman Sea, off the coast of Myanmar during trawl bottom surveys conducted by the R/V Dr. Fridtjof Nansen. Chelidoperca myathantuni sp. nov. is described based on 15 specimens (74.3–129.5 mm SL) from 101–185 m depth, which can be distinguished from all congeners by the following combination of characters: 3 (2 full-sized plus 1 half-sized) scale rows between lateral line and middle of spinous dorsal-fin base; 42–44 (modally 44) pored lateral-line scales; 16 pectoral-fin rays; interorbital scales extending to mid-orbit level; scales on ventral surface of lower jaw restricted to the angular (not extending onto the dentary); enlarged caniniform teeth on the upper jaw; side of body with longitudinal dashed black stripe; dorsal fin pale yellow with reddish pigment mostly restricted at base of spines and rays. Chelidoperca flavimacula sp. nov. is described based on eight specimens (49.7–70.7 mm SL) from 84–131 m depth, which can be distinguished from all congeners by the following combination of characters: 3 (2 full-sized plus 1 half-sized) scale rows between lateral line and middle of spinous dorsal-fin base; 42–45 (modally 42) pored lateral-line scales; 9–10 (modally 10) scale rows below the lateral line; 6 predorsal scales; 16–17 (modally 16) circumpeduncular scales; 5 scales rows on cheek; interorbital scales extending to mid-orbit level; anal fin with yellowish distal margin and three or four rows of bright yellow spots over its proximal half. 

New species of Parotocinclus (Siluriformes: Loricariidae) from coastal drainages of Rio de Janeiro, southeastern Brazil

Zootaxa ◽  
2017 ◽  
Vol 4232 (2) ◽  
pp. 260 ◽  
Author(s):  
FÁBIO F. ROXO ◽  
BRUNO F. MELO ◽  
GABRIEL S. C. SILVA ◽  
CLAUDIO OLIVEIRA
Keyword(s):  
New Species ◽  
Rio De Janeiro ◽  
Ventral Surface ◽  
Southeastern Brazil ◽  
Anterior Portion ◽  
Caudal Fin ◽  
Triangular Patch ◽  
Black Blotch ◽  
Dark Pigmentation ◽  
Adipose Fin

A new species of Parotocinclus is described from tributaries of rio São João, an Atlantic coastal river of Rio de Janeiro, southeastern Brazil. The new species is distinguished from its congeners by the possession of a triangular patch of dark pigmentation on the anterior portion of the dorsal-fin base, a fully developed adipose fin, complete exposure of the ventral surface of the pectoral girdle, and a distinctive pigmentation pattern of the caudal fin. The caudal fin has a hyaline background with a large black blotch covering its anterior portion, tapering irregularly through distal portions of the ventral lobe with a hyaline rounded area, and a small patch of dark pigmentation on distal portions of the dorsal lobe.  

scholarly journals Two new species of Characidium Reinhardt (Characiformes: Crenuchidae) from northeastern Brazilian coastal drainages

2015 ◽  
Vol 13 (3) ◽  
pp. 487-498 ◽  
Author(s):  
Angela M. Zanata ◽  
Priscila Camelier
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Posterior Margin ◽  
The Other ◽  
Caudal Fin ◽  
Two New Species ◽  
Black Blotch ◽  
Secondary Sexual Dimorphism ◽  
Secondary Sexual

Two new species of Characidium , onefrom the rio Pardo basin, and anotherfrom the rio Paraguaçu basin, Bahia, Brazil, are described. The first new speciesis distinguished from its congeners by having conspicuous black vertical traces on body, formed by the concentration of melanophores along posterior margin of scales. The species further differs from most congeners by the presence of a conspicuous 3-shaped black blotch on the caudal fin and isthmus not covered by scales. The other new species is distinguished from congeners by having irregular dark blotches on dorsum alternating elongation to one or the other side of body, usually not connected to lateral blotches. The species can be further characterized by the absence of conspicuous blotches or bars on fins and the presence of secondary sexual dimorphism, such as pelvic fins of mature males longer than in females and with bony hooks.

Coloconger maculatus sp. nov., a species of short-tail eel from eastern Taiwan (Anguilliformes: Colocongridae)

Zootaxa ◽  
2021 ◽  
Vol 5016 (2) ◽  
pp. 271-282
Author(s):  
HSUAN-CHING HO ◽  
CHI-NGAI TANG ◽  
TAH-WEI CHU
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Large Female ◽  
Dorsal Fin ◽  
Posterior Nostril ◽  
Fin Rays ◽  
Black Blotch ◽  
Eye Diameter ◽  
Fin Length ◽  
A New Species

A new species of Coloconger is described from a large female collected off eastern Taiwan. It can be distinguished from congeners by having a large black blotch on rear portion of tail; posterior end of tail white; and combination of characters: head small 15.7% TL; 4 supratemporal pores, middle 2 in pair; 7 supraorbital pores, 2 pores over posterior nostril; 12 or 14 infraorbital pores; 14 preoperculomandibular pores; 226 dorsal-fin rays and 122 anal-fin rays; preanal vertebrae 77 and total vertebrae 145; rictus through a vertical of posterior margin of pupil; snout shorter than eye diameter; distance between origins of pectoral and dorsal fins 69.4% pectoral-fin length; and body brownish gray dorsally, light gray ventrally, and dorsal fin dark gray. Data and variations of Coloconger japonicus found in Taiwan are provided and discussed.  

The identity of Schizothorax griseus Pellegrin, 1931, with descriptions of three new species of schizothoracine fishes (Teleostei: Cyprinidae) from China

Zootaxa ◽  
2009 ◽  
Vol 2006 (1) ◽  
pp. 23-40 ◽  
Author(s):  
JIAN YANG ◽  
XIAOYONG CHEN ◽  
JUNXING YANG
Keyword(s):  
New Species ◽  
Ventral Surface ◽  
Posterior Chamber ◽  
Lower Lip ◽  
Pectoral Fins ◽  
Dorsal Fin ◽  
Black Spots ◽  
Fin Ray ◽  
Eye Diameter ◽  
Three New Species

The identity of Schizothorax griseus Pellegrin, 1931, is clarified and the species redescribed. Three new species previously identified as S. griseus are described: S. nudiventris, from the Lancang Jiang, China; S. heterophysallidos, from the Nanpan Jiang, China; and S. beipanensis, from the upper Beipan Jiang, China. The group comprising Schizothorax griseus, S. nudiventris, S. heterophysallidos and S. beipanensis can be diagnosed from other members of this genus by the absence of an obvious horny sheath on the lower jaw; lower lip developed with three labial lobes in mature individuals; postlabial groove continuous, with a small labial lobe present in the middle of the lower lip; last unbranched dorsal-fin ray strong, its posterior edge with numerous serrae; and scales absent on ventral surface between pectoral fins in adults (except in S. griseus). Schizothorax griseus differs from S. nudiventris, S. heterophysallidos and S. beipanensis by the presence (vs. absence) of concealed scales in the skin on the ventral surface between the pectoral fins in adults; the presence (vs. absence) of a shallow ethmoidal groove before the nostrils; and having barbels much longer than eye diameter (eye diameter 33.4–93.7 % (vs. 57.2–160.0) of maxillary-barbel length). Schizothorax nudiventris is distinguished from S. heterophysallidos and S. beipanensis in having only the proximal ¾ (vs. entirety) of the last unbranched dorsal-fin ray strong; pelvic-fin origin opposite or posterior (vs. opposite or anterior) to vertical through dorsal-fin origin; and irregular black spots present (vs. absent) on side of body. Schizothorax heterophysallidos is distinguished from S. griseus, S. nudiventris and S. beipanensis in having a larger posterior chamber of the air bladder (vs. posterior chamber as large as, or slightly larger than, anterior one), length of posterior chamber 3–6 (vs. 2) times length of anterior chamber. Schizothorax beipanensis is distinguished from S. griseus by the absence (vs. presence) of scales on the thorax in mature individuals; absence (vs. presence) of black spots on side of body; and having the maxillary barbel 58.5–120.1 % SL (vs. 33.4–93.7 % SL).

Sign in / Sign up

Export Citation Format

Share Document