Nothobranchius elucens, a new species of seasonal killifish from the upper Nile drainage in Uganda (Cyprinodontiformes: Nothobranchiidae)

Zootaxa ◽  
2021 ◽  
Vol 4915 (1) ◽  
pp. 133-147
Author(s):  
BÉLA NAGY
Keyword(s):  
New Species ◽  
Species Group ◽  
Caudal Peduncle ◽  
Morphometric Characters ◽  
Light Blue ◽  
Interorbital Width ◽  
Body Colouration ◽  
Peduncle Length ◽  
A New Species ◽  
Male Coloration

Nothobranchius elucens, new species, from a seasonal habitat in the Aringa system of the Achwa River in the upper Nile drainage in northern Uganda, is described. It belongs to the N. rubroreticulatus species group, whose members are characterised by male coloration of anal and caudal fins with slender light blue subdistal band and slender dark distal band. Nothobranchius elucens is distinguished from all other members of the genus by the following characters in males: body colouration golden-grey with brown scale margins creating irregular vertical stripes on trunk; anal fin yellow with brown spots proximally, with slender brown median band, followed by a slender light blue subdistal band and a slender black distal band; caudal fin brown proximally and medially, followed by a slender light blue subdistal band and a slender black distal band; dorsal fin golden with irregular brown stripes and narrow light blue subdistal band and with narrow black distal band. Furthermore, it differs from the closest known relative, N. taiti, also by the morphometric characters of having a smaller head length of 29.5–33.1 % SL; smaller prepectoral length of 31.2–33.9 % SL; greater head depth of 81–87 % HL; greater interorbital width of 43–49 % HL; and greater caudal peduncle length of 145–152 in % of its depth. 

scholarly journals Akysis longifilis, a new species of catfish (Teleostei: Akysidae) from Myanmar

Zootaxa ◽  
2006 ◽  
Vol 1150 (1) ◽  
pp. 19 ◽  
Author(s):  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Species Group ◽  
Head Width ◽  
Posterior Edge ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Pectoral Spine ◽  
Adipose Fin ◽  
Peduncle Length ◽  
A New Species

Akysis longifilis, new species, is described from the Sittang River drainage in Myanmar. It is a member of the A. variegatus species group and can be distinguished from congeners in the group (except for A. brachybarbatus, A. fuliginatus, A. pictus, A. prashadi, A. variegatus, A. varius and A. vespa) in having a smooth (vs. serrated) posterior edge of the pectoral spine. It is distinguished from A. brachybarbatus, A. fuliginatus, A. pictus, A. prashadi, A. variegatus, A. varius and A. vespa in having a unique combination of: length of adipose-fin base 25.7–31.1% SL, body depth at anus 9.7–13.6% SL, caudal peduncle length 18.3–23.2% SL, caudal peduncle depth 5.6–7.2% SL, head width 21.1–24.7% SL, nasal barbel length 67.4–96.4% HL, maxillary barbel length 123.2–159.6% HL, vertebrae 33–35, body with light saddle-shaped spots, and caudal fin forked.

A new species of the deepwater scorpionfish genus Phenacoscorpius (Teleostei: Scorpaenidae) from the Galápagos Islands

Zootaxa ◽  
2017 ◽  
Vol 4323 (2) ◽  
pp. 261 ◽  
Author(s):  
KUNTO WIBOWO ◽  
HIROYUKI MOTOMURA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Galapagos Islands ◽  
Galápagos Islands ◽  
Caudal Peduncle ◽  
Morphometric Characters ◽  
Interorbital Width ◽  
Fin Rays ◽  
A New Species ◽  
Pectoral Fin Rays

A new species of scorpionfish, Phenacoscorpius mccoskeri, is described based on three specimens from the Galápagos Islands, Ecuador, eastern Pacific. The new species is distinguished from other species of Phenacoscorpius by the following combination of characters: 19–20 pectoral-fin rays, middle rays branched; 5–19 pored lateral-line scales; palatine teeth present; small slit behind fourth gill arch; second preopercular spine absent; and nuchal and parietal spines distinct; in addition to some morphometric characters, including head length and width, interorbital width, caudal-peduncle depth and postorbital length. 

Phenacoscorpius longirostris, a new species of deep water scorpionfish (Scorpaeniformes: Scorpaenidae) from the northern Tasman Sea, southwestern Pacific Ocean

Zootaxa ◽  
2009 ◽  
Vol 2290 (1) ◽  
pp. 27-35 ◽  
Author(s):  
HIROYUKI MOTOMURA ◽  
PETER R. LAST
Keyword(s):  
New Species ◽  
Deep Water ◽  
Head Width ◽  
Caudal Peduncle ◽  
Morphometric Characters ◽  
Tasman Sea ◽  
Norfolk Island ◽  
Peduncle Length ◽  
A New Species ◽  
Pectoral Fin Rays

A new species of deep water scorpionfish, Phenacoscorpius longirostris, is described on the basis of two specimens from the Norfolk Island Ridge and Lord Howe Rise, northern Tasman Sea, at depths of 300–322 m. The new species is distinguished from other congeners by the following combination of characters: all pectoral-fin rays unbranched; no palatine teeth; second preopercular spine well-developed, its length longer than third or fourth spines; and several morphometric characters, including orbit diameter, head width, caudal-peduncle length and depth, and snout, predorsal, preanal and prepelvic lengths.

A new species of Yunnanilus (Cypriniformes: Nemacheilidae) from Sichuan, southwest China

Zootaxa ◽  
2018 ◽  
Vol 4532 (1) ◽  
pp. 137
Author(s):  
LI-NA DU ◽  
MIAN HOU ◽  
XIAO-YONG CHEN ◽  
JUN-XING YANG
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Southwest China ◽  
Pectoral Fin ◽  
Caudal Peduncle ◽  
Interorbital Width ◽  
Eye Diameter ◽  
Peduncle Length ◽  
Fin Length ◽  
A New Species

A new species of Yunnanilus is described from Tuojiang River, Sichuan, China. The new species, Yunnanilus jiuchiensis, can be distinguished from other species of Yunnanilus by the following combination of characters: processus dentiformis absent; body covered with scarce scales; lateral-line incomplete, as long as half the length of the pectoral-fin length, with 6–11 pores; eye diameter larger than interorbital width; and caudal-peduncle length less than its depth. 

scholarly journals Traccatichthys tuberculum, a new species of nemacheiline loach from Guangdong Province, South China (Pisces: Balitoridae)

Zootaxa ◽  
2012 ◽  
Vol 3586 (1) ◽  
pp. 304 ◽  
Author(s):  
CHUN-XIAN DU ◽  
E ZHANG ◽  
BOSCO PUI LOK CHAN
Keyword(s):  
New Species ◽  
South China ◽  
Guangdong Province ◽  
Color Pattern ◽  
Caudal Peduncle ◽  
Peduncle Length ◽  
Coastal River ◽  
Fin Length ◽  
A New Species ◽  
Preanal Length

Traccatichthys tuberculum, new species, is herein described from the Jian-Jiang, a coastal river in Guangdong Province,South China. Photo by Bosco P.L. Chan. This new species differs from all other Chinese congeners (i.e., T. pulcher and T.zispi) in interorbital width, caudal-peduncle length, and pectoral-fin length. It, together with T. zispi, lacks the colorpatterns of the dorsal and anal fins in T. pulcher, and differs from T. zispi in preanal length. Traccatichthys tuberculum,together with all other Chinese congeners, is distinct from the Vietnamese species, T. taeniatus, in the shape of the black bar on the caudal-fin base, and the color pattern of the anal fin.

Triplophysa sanduensis, a new loach species of nemacheilid (Teleostei: Cypriniformes) from South China

Zootaxa ◽  
2019 ◽  
Vol 4560 (2) ◽  
pp. 375
Author(s):  
SHI-JING CHEN ◽  
ZUO-GANG PENG
Keyword(s):  
New Species ◽  
Guizhou Province ◽  
Coi Gene ◽  
Posterior Chamber ◽  
Mitochondrial Cytochrome Oxidase Subunit ◽  
Caudal Peduncle ◽  
Fin Rays ◽  
Peduncle Length ◽  
Mitochondrial Cytochrome Oxidase ◽  
A New Species

A new species of Nemacheilidae, Triplophysa sanduensis sp. nov., is described here based on specimens collected from a small cave in Dengguang Village, Zhonghe Town, Sandu County, Guizhou Province, China. The new species can be distinguished from its congeners by the following combination of characters: branched dorsal-fin rays 8–9; branched pectoral-fin rays 8–9; branched pelvic-fin rays 5; branched anal-fin rays 5; vertebrae 4+37; snout length 45.5–50.1% of head length; postdorsal length 39.0–42.8% of standard length; caudal-peduncle depth/caudal-peduncle length range from 56.4% to 71.9%; the posterior chamber of the gas bladder degenerated; body elongated, covered by scattered scales; eyes present and normal in size, not reduced or absent; and a complete lateral line. A phylogenetic analysis based on the mitochondrial cytochrome oxidase subunit 1 (COI) gene resolved Triplophysa sanduensis as sister to Triplophysa longliensis. Kimura's 2-parameter genetic distance of the COI gene sequences between these two species was 1.9%. 

Exostoma kottelati, a new species of catfish (Teleostei: Sisoridae) from Arunachal Pradesh, India

Zootaxa ◽  
2019 ◽  
Vol 4585 (2) ◽  
pp. 369 ◽  
Author(s):  
ACHOM DARSHAN ◽  
WAIKHOM VISHWANATH ◽  
SANTOSHKUMAR ABUJAM ◽  
DEBANGSHU NARAYAN DAS
Keyword(s):  
New Species ◽  
River Basin ◽  
Arunachal Pradesh ◽  
Brahmaputra River ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Brahmaputra Basin ◽  
Adipose Fin ◽  
Peduncle Length ◽  
A New Species

Exostoma kottelati, new species, is described from the Ranga River, Brahmaputra basin, in Arunachal Pradesh state, northeastern India. It differs from congeners in the Brahmaputra River basin in having a longer adipose-fin base (33.4–36.0 % SL vs. 23.4–32.9), a greater (except E. mangdechhuensis) pre-pelvic length (45.6–47.3 % SL vs. 39.3–44.6) and a greater pre-anal length (73.9–76.5 % SL vs. 62.2–70.1). It further differs from all known congeners by the following unique combination characters: the adipose fin is distinctly separated from the dorsal procurrent caudal-fin rays, pre-dorsal length 38.9–41.7% SL, adipose-fin base length 33.4–36 % SL, caudal peduncle length 18.7–21.1 % SL, caudal peduncle depth 8.8–9.5 % SL, and body depth at anus 12.5–13.5 % SL. This is the fifth species of Exostoma known from the Brahmaputra River basin. 

Nothobranchius nikiforovi, a new species of seasonal killifish from the lower Matandu drainage in south-eastern coastal Tanzania (Cyprinodontiformes: Nothobranchiidae)

Zootaxa ◽  
2021 ◽  
Vol 4950 (1) ◽  
pp. 103-122
Author(s):  
BÉLA NAGY ◽  
BRIAN R. WATTERS ◽  
ALEXANDRA A. RASPOPOVA
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Distal Portion ◽  
Species Group ◽  
Colour Pattern ◽  
Caudal Fin ◽  
Light Blue ◽  
South Eastern ◽  
Median Fins ◽  
A New Species

Nothobranchius nikiforovi, a new species known from seasonal habitats in the lower Matandu drainage in south-eastern coastal Tanzania is described. It is distinguished from all other congeners, except N. eggersi, by males presenting two colour phenotypes: the blue phenotype having a bright iridescent light blue to blue-green body, with narrow red-brown scale margins creating irregular reticulated pattern, forming chevron-shaped crossbars on the posteroventral portion of body and light blue median fins with red-brown dotted pattern; the red phenotype has a dark red head, light blue dorsal and anal fins proximally and medially, dark red distally, with dark red stripes parallel to the fin rays, and a plain dark red caudal fin. Nothobranchius nikiforovi differs from N. eggersi by male colour pattern, the blue phenotypes having median fins with dark grey distal portion, some of the rays of dorsal and anal fins with white tips (vs. median fins with distinct slender white distal band), and the caudal fin lacking a spotted pattern (vs. dots arranged into irregular curved stripes); the red phenotype with golden stripe between the nape and dorsal-fin origin (vs. light-blue stripe), the dorsal and anal fins with a plain red distal portion and lacking a light distal band (vs. with distinct narrow white distal band), the pelvic fin lacking a distal band (vs. with distinct slender light blue to white distal band), and some morphometric differences. Phylogenetic analyses also support the genetic distinction of the new species from its closest known relative, N. eggersi, and confirm its position in the N. guentheri species group within the Adiniops subgenus. 

Akysis bilustris, a new species of catfish from southern Laos (Siluriformes: Akysidae)

Zootaxa ◽  
2011 ◽  
Vol 3066 (1) ◽  
pp. 61
Author(s):  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Base Length ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Pectoral Spine ◽  
Eye Diameter ◽  
Adipose Fin ◽  
Peduncle Length ◽  
A New Species ◽  
Pelvic Fin

Akysis bilustris, new species, is described from the Xe Kong drainage (a subdrainage of the Mekong River) in southern Laos. It is distinguished from congeners in having a unique combination of the following characters: eye diameter 14.0– 17.5% HL, serrae on posterior margin of pectoral spine 2–3 and longer than half width of spine, pectoral fin reaching to or overlapping pelvic-fin base (length 24.5–29.3% SL), adipose-fin base length 14.3–18.3% SL, body depth at anus 11.4– 13.8% SL, caudal-peduncle length 19.6–23.4% SL, caudal-peduncle depth 6.7–9.2% SL, caudal fin emarginate, and vertebrae 30–31.

scholarly journals A new species of Characidium (Characiformes: Crenuchidae) from coastal basins in the Atlantic Rainforest of eastern Brazil, with phylogenetic and phylogeographic insights into the Characidium alipioi species group

2019 ◽  
Vol 17 (2) ◽  
Author(s):  
Evandro Malanski ◽  
Luisa Maria Sarmento-Soares ◽  
Ana Cecilia Gomes Silva-Malanski ◽  
Maridiesse Morais Lopes ◽  
Leonardo Ferreira da Silva Ingenito ◽  
...  
Keyword(s):  
New Species ◽  
Species Group ◽  
Southeastern Brazil ◽  
Molecular Evidence ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Eastern Brazil ◽  
Coastal Basins ◽  
A New Species ◽  
Pelvic Fin

ABSTRACT A new species of Characidium from southeastern Brazil is described based on morphological and molecular evidence from specimens collected between the rio Jucuruçu and rio Doce basins. The new species belongs to a group of species within Characidium with an unscaled area in the isthmus and is distinguished from these species, except C. alipioi, C. fasciatum, C. hasemani, and C. kamakan, by the greater distance (greater than 10% SL) and presence of 5-7 scales between the anus and the anal fin, and presence of 14 series of scales around the caudal peduncle. The species is distinguished from C. alipioi by having 4 series of scales above the lateral line (vs. 5 series) and greater distance between the anus and the anal fin; from C. fasciatum and C. kamakan, by the smaller body depth at the dorsal-fin origin, at the anal-fin origin, and at the caudal peduncle; from C. hasemani, by the short distances between the tip of the snout and the pelvic fin, the tip of the snout and the anal fin, and the tip of the snout and the tip of anal fin. The new species forms a presumably monophyletic group with C. alipioi and C. kamakan.

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