Two new species of Astyanax Baird & Girard (Characiformes: Characidae) from the upper rio Paraguaçu basin, Chapada Diamantina, Bahia, Brazil

Zootaxa ◽  
2018 ◽  
Vol 4438 (3) ◽  
pp. 471 ◽  
Author(s):  
ANGELA M. ZANATA ◽  
RAFAEL BURGER ◽  
PRISCILA CAMELIER
Keyword(s):  
Species Complex ◽  
Ventral Margin ◽  
Broad Area ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Chapada Diamantina ◽  
The Third ◽  
Astyanax Scabripinnis ◽  
Two New Species ◽  
Fin Rays

Astyanax lorien and A. rupestris are described from tributaries of upper rio Paraguaçu basin, Bahia, Brazil. Both species shares the majority of the characters currently used to define the Astyanax scabripinnis species complex, with highest body depth approximately at vertical through pectoral-fin midlength and a low number of branched anal-fin rays (15–21). Astyanax lorien is distinguished from its congeners by a combination of characters, including presence of small bony hooks on all fins of mature males, a unique vertically elongate humeral blotch, and ventral margin of the third infraorbital close to the horizontal limb of preopercle. Astyanax rupestris is distinguished from its congeners also by a combination of characters, including ventral margin of third infraorbital distinctly separated from horizontal limb of preopercle, leaving a broad area without superficial bones, absence of midlateral stripe on body, absence of blotch on caudal peduncle, and presence of a vertically elongated conspicuous dark humeral blotch, not bordered anteriorly and posteriorly by distinct unpigmented areas. Both species are apparently endemic to the upper portion of the Paraguaçu river basin, within the Chapada Diamantina domain. 

A new species of Astyanax Baird & Girard (Characiformes: Characidae) from western Chapada Diamantina, Bahia, Brazil

Zootaxa ◽  
2019 ◽  
Vol 4604 (2) ◽  
pp. 369 ◽  
Author(s):  
RAFAEL BURGER ◽  
FERNANDO R. CARVALHO ◽  
ANGELA M. ZANATA
Keyword(s):  
New Species ◽  
Species Complex ◽  
Morphological Characters ◽  
Body Depth ◽  
Chapada Diamantina ◽  
Dorsal Fin ◽  
Astyanax Scabripinnis ◽  
Fin Rays ◽  
A New Species ◽  
Pelvic Fin

A new species of Astyanax from the upper rio Paraguaçu basin, Chapada Diamantina, Bahia, Brazil, is described. Astyanax sincora shares characters currently used to define the Astyanax scabripinnis species complex, as highest body depth approximately at vertical through pectoral-fin midlength and a low number of branched anal-fin rays (13–17). It differs from its congeners by a combination of characters, including eight branched dorsal-fin rays, six branched pelvic-fin rays, presence of bony hooks in pectoral and anal fins of males, dark midlateral line or stripe initiating posteriorly to the vertically elongate humeral blotch, and by the presence of 30–35 scales in the median longitudinal series. The generic positioning of the new species and some polymorphic morphological characters in Astyanax are briefly discussed. The degree of completeness of the lateral line in Hyphessobrycon balbus is discussed. [Species Zoobank registration: urn:lsid:zoobank.org:pub:D708FE7E-3FB5-4729-B438-779717F7ED1A] 

scholarly journals Two new species of Astyanax (Ostariophysi: Characiformes: Characidae) from eastern Brazil, with a synopsis of the Astyanax scabripinnis species complex

2006 ◽  
Vol 4 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Vinicius A. Bertaco ◽  
Carlos A. S. de Lucena
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Standard Length ◽  
Species Complex ◽  
Body Depth ◽  
Astyanax Scabripinnis ◽  
Interorbital Width ◽  
Eastern Brazil ◽  
Two New Species ◽  
Fin Rays

Two new species of Astyanax are described from eastern Brazil: A . microschemos from the córrego Palmital, rio Itapemirim drainage, Espírito Santo, and A . pelecus from the rio Pardo drainage, Bahia. Astyanax microschemos differs from its congeners by its shallower body depth, 26.9-29.7% of standard length, the presence of one vertically elongate humeral spot that extend above and below the lateral line, smaller interorbital width, 26.9-30.4% of head length, and the possession of 14-18 branched anal-fin rays. Astyanax pelecus differs from its congeners in the possession of only one humeral spot limited to the region dorsal to the lateral line, conspicuous, dark, midlateral body stripe extending from the upper margin of the opercle to the caudal-fin base, a shallower body depth, 26.7-34.8% of standard length, and the possession of 16-18 branched anal-fin rays, 38-39 scales in the lateral-line series, and four scales between the lateral line and the pelvic-fin origin. Astyanax microschemos has a massive head, short snout, usually smaller than the orbital diameter, shallow body depth, and vertically-elongate humeral spot that serve to include it in the A . scabripinnis species complex. A comparative synopsis of this complex is provided.

Two new species of Jupiaba (Characiformes: Characidae) from the rio Tapajós and rio Madeira drainages, Brazil, with an identification key to species of the genus

Zootaxa ◽  
2009 ◽  
Vol 2262 (1) ◽  
pp. 53-68 ◽  
Author(s):  
ANDRÉ L. NETTO-FERREIRA ◽  
ANGELA M. ZANATA ◽  
JOSÉ L.O. BIRINDELLI ◽  
LEANDRO M. SOUSA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Color Pattern ◽  
Dark Spot ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Two New Species ◽  
Fin Rays ◽  
Eye Diameter ◽  
Rio Madeira

Two new species of Jupiaba Zanata are described from Brazil. Jupiaba iasy, new species, is described from rio Teles Pires and rio Jamanxim, tributaries of rio Tapajós, and from rio Aripuanã, in the rio Madeira drainage. It is distinguished from its congeners by its color pattern consisting of a single posteriorly displaced dark crescent-shaped humeral blotch, situated over the first 5 to 7 lateral line scales, and an inconspicuous dark spot at the end of caudal peduncle. It also differs from all remaining Jupiaba for the following combination of characters: 34-36 lateral line scales, 19–21 branched anal-fin rays, 8–10 predorsal scales arranged in a regular row, 6 horizontal series of scales above and 4 series below lateral line, body depth 32.3–36.1% of SL, and absence of filamentous rays in the first dorsal and anal-fin rays. Jupiaba paranatinga, new species, is described from rio Teles Pires, tributary of rio Tapajós. It is distinguished by having 34–35 lateral line scales, two vertically elongated humeral blotches, a conspicuous caudal spot at the end of the caudal peduncle, extending over 8–10 median caudal-fin rays, eye diameter 43.7–46.9% of HL, and relatively low body depth (31.3–35.5% of SL). Additionally, comments on the putative relationships of the new species with their congeners and an updated key to the species of the genus are provided.

scholarly journals Two new species of deeper dwelling Apogon (Perciformes: Apogonidae) from Micronesia and South Pacific Ocean

Zootaxa ◽  
2003 ◽  
Vol 171 (1) ◽  
pp. 1 ◽  
Author(s):  
THOMAS H. FRASER ◽  
JOHN E. RANDALL
Keyword(s):  
New Species ◽  
Gill Rakers ◽  
Caudal Peduncle ◽  
Spine Length ◽  
The Third ◽  
Dorsal Fin ◽  
South Pacific Ocean ◽  
Two New Species ◽  
Fin Rays ◽  
Austral Islands

Apogon brevispinis is described from two specimens, the larger of which is missing the caudal peduncle, collected at the Austral Islands. This species has a tiny first dorsal-fin spine (5-8% of the third dorsal-fin spine length), 18-19 well-developed gill rakers on first arch, 5 predorsal scales, elongated last soft dorsal and anal fin-rays, 14 circumpeduncular scales, 5 broad tan-brown stripes alternating with 5 narrow whitish stripes, and an irregular dark caudal peduncle mark. Apogon regula is described from five specimens collected in Guam and the Carolina Islands. This species has a longer first dorsal-fin spine (10-15% of the third dorsal-fin spine length), 13-14 well-developed gill rakers on first arch, 4 predorsal scales, 12-13 circumpeduncular scales 5 broad golden-brown stripes alternating with 4 narrow whitish stripes, and dark brown broad stripes on the upper and lower caudal peduncle.

Two new species of Astyanax (Characiformes: Characidae) from upper rio Paraguaçu and rio Itapicuru basins, Chapada Diamantina, Bahia, Brazil

Zootaxa ◽  
2008 ◽  
Vol 1908 (1) ◽  
pp. 28-40 ◽  
Author(s):  
ANGELA M. ZANATA ◽  
PRISCILA CAMELIER
Keyword(s):  
New Species ◽  
Pectoral Fin ◽  
Caudal Peduncle ◽  
Chapada Diamantina ◽  
Dark Stripe ◽  
Two New Species ◽  
Fin Rays ◽  
Eye Diameter

Two new characid species, Astyanax epiagos, from the upper rio Jacuípe, rio Paraguaçu basin, and A. jacobinae, from the upper rio Itapicuru-mirim, rio Itapicuru basin, Chapada Diamantina, Bahia, Brazil, are described. Astyanax epiagos is distinguished from the majority of its congeners and from all Astyanax known to occur in northeastern Brazilian drainages by the reduced number of branched anal-fin rays (usually 14-16), along with a series of other distinctive characters (e.g., vertically elongated humeral blotch, conspicuous dark blotch over caudal peduncle, absence of conspicuous midlateral dark stripe, body highest around vertical through midlength of pectoral-fin, absence of scales over anal-fin base, presence of broad naked space between infraorbitals and preopercle). Astyanax jacobinae differs from its congeners by a combination of morphometric, meristic, and pigmentary characters (e.g., large eye diameter, three maxillary teeth, presence of a vertically elongated humeral blotch, absence of a conspicuous dark midlateral stripe or conspicuous spot over caudal peduncle, absence of broad naked space between infraorbitals and preopercle).

scholarly journals Redescription of Astyanax goyacensis Eigenmann, 1908 (Ostariophysi: Characiformes: Characidae)

2009 ◽  
Vol 7 (3) ◽  
pp. 371-376 ◽  
Author(s):  
Valdener Garutti ◽  
Francisco Langeani
Keyword(s):  
Lateral Line ◽  
Species Complex ◽  
Color Pattern ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Black Stripe ◽  
Conspicuous Feature ◽  
Fin Rays ◽  
Shape Pattern ◽  
Eye Diameter

Astyanax goyacensis Eigenmann, 1908 is redescribed based on the holotype and 25 topotypes. The species belongs to the A. bimaculatus species complex, sharing with those species a black, horizontally ovate, humeral spot (the most conspicuous feature of this complex), two diffuse vertical brown bars in the humeral area (the first through humeral spot and the second 2-3 scales behind), and black medium caudal-fin rays. Furthermore, A. goyacensis possesses a black stripe extending along midlateral body portion, more conspicuous in alcohol preserved specimens. These characteristics allow its inclusion in the putative "black lateral stripe" sub-group of A. bimaculatus species complex. From the species of this complex it differs by the black lateral stripe shape, pattern of chromatophores on the flank, coloration of the caudal fin, scales on the lateral line, branched rays on anal fin, eye diameter, and caudal peduncle depth. Comments about the color pattern in Astyanax bimaculatus species complex are added.

Tonlesapia amnica, a new species of dragonet (Teleostei: Callionymidae) from the Mekong delta HEOK HEE NG (Singapore) & WALTER J. RAINBOTH (USA)

Zootaxa ◽  
2011 ◽  
Vol 3052 (1) ◽  
pp. 62 ◽  
Author(s):  
HEOK HEE NG ◽  
WALTER J. RAINBOTH
Keyword(s):  
New Species ◽  
Mekong Delta ◽  
Mekong River ◽  
Ventral Margin ◽  
Caudal Peduncle ◽  
Southern Vietnam ◽  
Dorsal Fin ◽  
Infraorbital Canal ◽  
Fin Rays ◽  
A New Species

Tonlesapia amnica, a new species of dragonet lacking a first dorsal fin, is described from the Mekong River delta in southern Vietnam. It can be distinguished from its sole congener, T. tsukawakii, in having the infraorbital canal extending beyond (vs. not reaching) ventral margin of orbit, a more slender body (7.2–13.5% SL vs. 14.3–15.0) and caudal peduncle (4.4–5.2% SL vs. 5.1–6.3), a smaller eye (6.5–8.3% SL vs. 8.7–9.2) and more dorsal-fin rays (9–10 vs. 8).

Nandus prolixus, a new species of leaf fish from northeastern Borneo (Teleostei: Perciformes: Nandidae)

Zootaxa ◽  
2006 ◽  
Vol 1328 (1) ◽  
pp. 51 ◽  
Author(s):  
PROSANTA CHAKRABARTY ◽  
RONALD G. OLDFIELD ◽  
HEOK H. NG
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Slender Body ◽  
Dark Spot ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Dorsal Fin ◽  
Fin Rays ◽  
A New Species ◽  
Pectoral Fin Rays

Nandus prolixus sp. nov. is described from the Sepilok River drainage in Sabah, northeastern Borneo. This species is distinguished from its only Sundaic southeastern Asian congener, N. nebulosus, in having a longer, more produced snout (25.7–30.6% HL vs. 18.5–26.1), more lateralline scales (33–37 vs. 24–34), more scales below the lateral line (12 vs. 10–11), fewer spines in the dorsal fin (XIV vs. XV–XVI), and fewer pectoral-fin rays (15–16 vs. 17–19). It differs from N. nandus (from India) in having fewer lateral-line scales (33–37 vs. 42–55), fewer scales above the lateral line (4–5 vs. 6–7), fewer scales below the lateral line (12 vs. 14–18), more dorsal spines (XIV vs. XII–XIII), and the absence (vs. presence) of a distinct dark spot at the base of the caudal peduncle. It differs from N. oxyrhynchus (from mainland southeastern Asia) in having a more slender body (body depth 37.6–40.5% SL vs. 41.3–44.1) and a less steeply sloping predorsal profile.

Description of two new species of the genus Automate De Man, 1888 (Crustacea: Decapoda: Caridea) from the South China Sea

Zootaxa ◽  
2017 ◽  
Vol 4238 (1) ◽  
pp. 30 ◽  
Author(s):  
YAN-RONG WANG ◽  
ZHONG-LI SHA
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Anterior Margin ◽  
Cutting Edge ◽  
Ventral Margin ◽  
Lower Margin ◽  
The Third ◽  
Two New Species ◽  
De Man

Three species of the genus Automate De Man, 1888 are described herein, including two new species: A. anacanthopusoides sp. nov. and A. spinosa sp. nov.. Automate anacanthopusoides sp. nov. can be easily identified by the presence of a rostrum, the notch on the lower margin of the major chela, the stout minor cheliped and the cutting edge of the pollex not dentate, and by the absence of spines on the ventral margin of the propodus of the third and fourth pereiopod. Automate spinosa sp. nov. can be easily identified by the nearly straight anterior margin of the carapace, and the presence of spines on the ventral margin of the propodus of third and fourth pereiopod. A key of all species of the Automate is provided. 

scholarly journals Redescription of Astyanax obscurus (Hensel, 1870) and A. laticeps (Cope, 1894) (Teleostei: Characidae): two valid freshwater species originally described from rivers of Southern Brazil

2010 ◽  
Vol 8 (1) ◽  
pp. 7-20 ◽  
Author(s):  
Vinicius A Bertaco ◽  
Carlos A. S. de Lucena
Keyword(s):  
Species Complex ◽  
Color Pattern ◽  
Freshwater Species ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Body Area ◽  
Body Depth ◽  
Morphometric Characters ◽  
Pectoral Fins ◽  
Fin Rays

Astyanax obscurus and A. laticeps are redescribed. Both species were originally described from the laguna dos Patos system, Rio Grande do Sul, Brazil. The deepest and most robust body area close to the middle of the pectoral fins length, robust head, snout short and abrupt, body depth smaller than 41% of SL, reduced number of branched anal-fin rays, presence of one or two humeral spots, and a dark midlateral body stripe extending to the tip of the middle caudal-fin rays include both in the A. scabripinnis species complex. The presence of two humeral spots (vs. one), external row of the premaxillary with pentacuspid teeth (vs. tricuspid), and absence of bony hooks in all fins in males (vs. presence in anal and ventral fins) distinguish A. obscurus from A. laticeps. These species distinguish from species of this complex by meristic and morphometric characters and color pattern. An identification key for the species of genus occurring in the laguna dos Patos system is presented.

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