Chrysobrycon yoliae, a new species of stevardiin (Characiformes: Characidae) from the Ucayali basin, Peru

Chrysobrycon yoliae, new species, is described from a drainage flowing into the río Yucamia basin, río Ucayali basin, Peru. Chrysobrycon yoliaeis readily distinguished from its congeners by the anterior tip of pelvic bone situated anterior to the fifth rib (vs. situated posterior to the fifth rib), the presence of 20-26 dentary teeth (vs. 11-19), and the possession of a terminal lateral-line tube between caudal-fin rays 10 and 11 (vs. the absence of this tube, except in C. eliasi). The new species differs from C. eliasiand C. myersiby the presence of teeth on third pharyngobranchial (vs. the absence of teeth on this bone) and also differs from C. eliasiby the dorsal-fin origin situated at vertical through anal-fin rays 5 to 7 (vs. located at vertical through anal-fin rays 8 to 10), the posterior extent of the ventral process of quadrate reaching the vertical through posterior margin of symplectic (vs. not reaching the vertical through posterior margin of symplectic), the dorsal-fin to adipose-fin length 26.8-28.8% SL (vs. 23.9-26.8% SL), and the body depth at dorsal-fin origin 34.4-42.2% SL (vs. 24.1-34.5% SL). A key for the identification of Chrysobryconspecies is provided.

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

Zootaxa ◽

10.11646/zootaxa.5016.2.7 ◽

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.

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Leiocassis rudicula (Teleostei: Siluriformes: Bagridae), a new catfish from eastern Borneo

Zootaxa ◽

10.11646/zootaxa.4651.1.12 ◽

2019 ◽

Vol 4651 (1) ◽

pp. 191-200

Author(s):

HEOK HEE NG ◽

RENNY K. HADIATY

Keyword(s):

New Species ◽

Posterior Margin ◽

Unique Combination ◽

Caudal Peduncle ◽

Body Depth ◽

Dorsal Fin ◽

Brown Band ◽

Eye Diameter ◽

Adipose Fin ◽

A New Species

A new species of bagrid catfish in the genus Leiocassis is described from the Mahakam River drainage in eastern Borneo. Leiocassis rudicula, new species, can be distinguished from congeners in having a unique combination of: distinct concavity at level of orbit in dorsolateral profile of head; tip of supraoccipital spine not reaching anterior nuchal plate element; smooth posterior margin of dorsal spine; presence of an irregular pale band on sides of body between dorsal and adipose fins; anal fin with narrow brown band across middle third of fin; narrow caudal-fin lobes with nearly straight posterior margins; snout length 36–40% HL; eye diameter 14–20% HL; head depth 17.6–20.0% SL; length of dorsal-fin spine 14.1–18.5% SL; length of pectoral-fin spine 15.1–17.7 %SL; dorsal-to-adipose distance 10.9–14.3% SL; body depth at anus 16.4–19.5% SL; length of adipose-fin base 18.9–24.1% SL; length of anal-fin base 18.8–22.6% SL; and caudal peduncle depth 9.1–10.9% SL. A revised key to the genus is also provided.

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Botia udomritthiruji, a new species of botiid loach from southern Myanmar (Teleostei: Botiidae)

Zootaxa ◽

10.11646/zootaxa.1608.1.6 ◽

2007 ◽

Vol 1608 (1) ◽

pp. 41-49 ◽

Cited By ~ 3

Author(s):

HEOK HEE NG

Keyword(s):

New Species ◽

Color Pattern ◽

The Body ◽

Central Portion ◽

Caudal Peduncle ◽

Body Depth ◽

Dorsal Fin ◽

Fin Rays ◽

Vertical Bars ◽

A New Species

Botia udomritthiruji sp. nov. is described from the Tenasserim River drainage in southern Myanmar. It can be distinguished from congeners by its color pattern, consisting of five dark vertical bars on the body, with the central portion of these bars paler than its edges; with increasing age, the edges of these bars become more irregular and darker, and irregular dark spots on the pale interspaces begin to form, sometimes fusing with the edges of the vertical bars. In morphology, it differs from congeners by a combination of: body depth at anus 23.4–27.7% SL, caudal peduncle depth 15.9– 18.7% SL, and 12 dorsal-fin rays. Evidence for considering B. macrolineata a junior synonym of B. dario and for considering B. rostrata a species distinct from B. almorhae is also presented here.

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Plectranthias purpuralepis sp. nov., a new anthiadine perchlet from northern Taiwan (Perciformes: Serranidae)

Zootaxa ◽

10.11646/zootaxa.4780.3.4 ◽

2020 ◽

Vol 4780 (3) ◽

pp. 508-522

Author(s):

CHI-NGAI TANG ◽

NOK-WAI LAI ◽

HSUAN-CHING HO

Keyword(s):

New Species ◽

Posterior Margin ◽

Ventral Margin ◽

Body Depth ◽

Dorsal Fin ◽

Small Scales ◽

Fin Rays ◽

A New Species ◽

Northern Taiwan ◽

Pectoral Fin Rays

A new species of Plectranthias Bleeker is described on the basis of 16 specimens collected from northern Taiwan. The new species, Plectranthias purpuralepis sp. nov. can be distinguished from its congeners in having pectoral and pelvic fins mostly covered with small scales, some white scales on dorsum turn purple when preserved, and the following combination of characters: dorsal-fin elements X, 16–17; 3rd dorsal-fin spine longest; pectoral-fin rays 14, all branched except for uppermost simple ray; principal caudal-fin rays 9+8; pored lateral-line scales 33–36; 6 diagonal rows of large scales on cheek; circumpeduncular scales 14; ca. 7 rows of large predorsal scales, 2 irregular rows of small scales extending to a line through posterior nostrils; no scales on maxilla and chin; posterior margin of preopercle serrated, ventral margin with 2 antrorse spines; and the greatest body depth 2.9–3.0 in SL.

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Navigobius asayake, a new species of ptereleotrine goby (Gobioidei: Microdesmidae) from Kagoshima, southern Japan

Zootaxa ◽

10.11646/zootaxa.4526.3.6 ◽

2018 ◽

Vol 4526 (3) ◽

pp. 373

Author(s):

MAKOTO OKAMOTO ◽

HIROYUKI MOTOMURA

Keyword(s):

New Species ◽

Dorsal Fin ◽

Southern Japan ◽

Fin Rays ◽

Eye Diameter ◽

Yellow Stripe ◽

Fin Length ◽

A New Species ◽

Pectoral Fin Rays ◽

Pelvic Fin

A new species of ptereleotrine dartfish, Navigobius asayake, is described based on four specimens (45.0–52.1 mm in standard length: SL) collected from off the Satsuma Peninsula and Tanegashima island, Kagoshima, southern Japan. It is distinguished from other congeners by the following combination of characters: second dorsal-fin rays I, 18–19; anal-fin rays I, 19; pectoral-fin rays 21–22; gill rakers 5–6 + 13–15; head length 25.1–26.4% SL; eye diameter 8.6–10.0% SL; pelvic-fin length 15.2–16.1% SL; and a well-developed yellow stripe extending from behind upper part of eye to beneath first dorsal fin.

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Gobiesox lanceolatus, a new species of clingfish (Teleostei: Gobiesocidae) from Los Frailes submarine canyon, Gulf of California, Mexico

Zootaxa ◽

10.11646/zootaxa.4221.3.8 ◽

2017 ◽

Vol 4221 (3) ◽

pp. 393 ◽

Cited By ~ 8

Author(s):

PHILIP A. HASTINGS ◽

KEVIN W. CONWAY

Keyword(s):

New Species ◽

Posterior Margin ◽

Gulf Of California ◽

Baja California ◽

Submarine Canyon ◽

Single Specimen ◽

Dorsal Fin ◽

Fin Rays ◽

A New Species ◽

Pectoral Fin Rays

Gobiesox lanceolatus is described from a single specimen collected from 300 meters depth in the Los Frailes submarine canyon in the southwestern Gulf of California. The "Canyon Clingfish" is unique within Gobiesox in having a lanceolate caudal fin, with the central rays longer than those above and below them. It is also distinguished by 14 dorsal-fin rays (first tiny and unsegmented), 11 anal-fin rays, 28 pectoral-fin rays, anus slightly closer to anal-fin origin than to posterior margin of pelvic disc, and dorsal-fin origin in front of vertical from anus. It is most similar to Gobiesox eugrammus, known from Isla Guadelupe, the coast of outer Baja California and southern California. This is the deepest record for a species of Gobiesox and only four other species of clingfishes are known from greater depths.

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Pseudobagarius eustictus, a new species of catfish from northern Laos (Siluriformes: Akysidae)

Zootaxa ◽

10.11646/zootaxa.4996.2.6 ◽

2021 ◽

Vol 4996 (2) ◽

pp. 322-330

Author(s):

HEOK HEE NG ◽

MAURICE KOTTELAT

Keyword(s):

New Species ◽

The Body ◽

Head Width ◽

Caudal Peduncle ◽

Body Depth ◽

Lower Jaw ◽

Pectoral Spine ◽

Eye Diameter ◽

Adipose Fin ◽

A New Species

Pseudobagarius eustictus, new species, is described from the Nam Heung drainage (a tributary of the Mekong River) in northern Laos. It is distinguished from congeners in having a unique combination of the following characters: a weakly-produced snout in which the upper jaw extends only slightly beyond the margin of the lower jaw when viewed ventrally, 3 tubercles on the posterior margin of the pectoral spine, eye diameter 8% HL, head width 24.1% SL, dark yellow dorsal and lateral surfaces of the head, pectoral spine lacking elongate extensions, pectoral fin reaching the pelvic-fin base when adpressed against the body, dorsolateral surfaces of body without longitudinal series of prominent tubercles, body depth at anus 13.7% SL, length of adipose-fin base 17.7% SL, caudal-peduncle depth 7.0% SL, and 33 vertebrae.

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

Zootaxa ◽

10.11646/zootaxa.1328.1.4 ◽

2006 ◽

Vol 1328 (1) ◽

pp. 51 ◽

Cited By ~ 4

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.

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Epinephelus fuscomarginatus (Perciformes: Epinephelidae), a new species of grouper from off the Great Barrier Reef, Australia

Zootaxa ◽

10.11646/zootaxa.4674.3.2 ◽

2019 ◽

Vol 4674 (3) ◽

pp. 329-348 ◽

Cited By ~ 1

Author(s):

JEFFREY W. JOHNSON ◽

JESSICA WORTHINGTON WILMER

Keyword(s):

New Species ◽

The Body ◽

The Sea Of Japan ◽

The East China Sea ◽

Body Depth ◽

Lower Jaw ◽

Fin Rays ◽

The Indian Ocean ◽

Body Comparison ◽

A New Species

A new species of epinephelid fish from northeastern Australia is described based on five specimens 408–564 mm SL collected by deep water demersal dropline fishing. Epinephelus fuscomarginatus sp. nov. is known from the Capricorn Channel, off the southern end of the Swain Reefs, Qld, Australia, in depths of 220–230 m. It is distinguished by a combination of dorsal-fin rays XI, 14, pectoral-fin rays 17, anal-fin rays III, 8, caudal-fin rounded, lateral-line scales 60–67, gill rakers 9–10 + 16–19 = 25–28, body depth 3.0–3.4 in SL, angle of preopercle broadly rounded, bearing 4–9 small non-prominent serrae, midlateral part of lower jaw with 2 rows of teeth, tooth patches on vomer and palatines narrow, in 2–3 and 2–4 rows, respectively, and coloration including broad dark brown margins to the soft dorsal, anal and caudal fins. There are no dark spots on the head, body, or fins at any known size and in subadults there are two faint pale brown bars radiating from the eye to the posterior margin of the opercle, and diffuse irregular brown wavy bars and blotches on the sides of the body. Comparison of the mitochondrial cytochrome c oxidase subunit 1 (CO 1) genetic marker utilised in DNA barcoding produced modest but consistent genetic divergences of 1.10% and 2.70 % between E. fuscomarginatus sp. nov. and its closest sampled congeners, E. magniscuttis and E. epistictus, respectively. Further evidence is presented to indicate that populations of E. epistictus currently recognised from the Indian Ocean east to the Indo-Australian Archipelago may be distinct from those from the Sea of Japan to the East China Sea.

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

Zootaxa ◽

10.11646/zootaxa.4604.2.9 ◽

2019 ◽

Vol 4604 (2) ◽

pp. 369 ◽

Cited By ~ 4

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]

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