Schistura larketensis, a new cavernicolous fish (Teleostei: Nemacheilidae) from Meghalaya, Northeast India

Zootaxa ◽  
2017 ◽  
Vol 4353 (1) ◽  
pp. 89
Author(s):  
HRISHIKESH CHOUDHURY ◽  
D. KHLUR B. MUKHIM ◽  
SUDEM BASUMATARY ◽  
DEISAKEE P. WARBAH ◽  
DANDADHAR SARMA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Ventral Surface ◽  
Northeast India ◽  
Lateral Line System ◽  
Brahmaputra River ◽  
Line System ◽  
Limestone Cave ◽  
A New Species

Schistura larketensis, a new species of cavernicolous loach, is described from Khung, a limestone cave in Meghalaya, India. The species differs from Schistura papulifera, its only troglomorphic congener from northeast India, in having a smooth ventral surface of the head, the presence of a small cylindrical axillary pelvic lobe, and the presence of three pores in the supratemporal canal of the cephalic lateral-line system. Apart from these differences, the species can be immediately distinguished from all other species of Schistura from the Brahmaputra River and neighboring basins by the complete absence (or only vestigial presence) of eyes. 

A new species of Microglanis (Siluriformes, Pseudopimelodidae) from lower Rio Tocantins basin, Pará, Brazil, with description of superficial neuromasts and pores of lateral line system

Zootaxa ◽  
2010 ◽  
Vol 2632 (1) ◽  
pp. 53 ◽  
Author(s):  
WILLIAM BENEDITO GOTTO RUIZ ◽  
OSCAR AKIO SHIBATTA
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Lateral Line ◽  
Lateral Line System ◽  
Caudal Peduncle ◽  
Line System ◽  
A New Species ◽  
Predorsal Distance

Microglanis robustus, new species, is the first Microglanis to be described from the Rio Tocantins basin, Pará, Brazil, and differs from the congeners by the presence of a cordiform blotch in the nape, instead of a transverse light stripe; neuromasts of the superficial lines surrounded by melanophores; robust body with short snout, head and predorsal distance; and deep caudal peduncle. The mapping of superficial neuromasts and cephalic sensory canals evidenced intra and interespecific polymorphisms and, therefore, of little value for phylogenetic analysis within the genus.

Schistura papulifera, a new species of cave loach from Meghalaya, India (Teleostei: Balitoridae)

Zootaxa ◽  
2007 ◽  
Vol 1393 (1) ◽  
pp. 35 ◽  
Author(s):  
MAURICE KOTTELAT ◽  
DANIEL R. HARRIES ◽  
GRAHAM S. PROUDLOVE
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Lower Half ◽  
Lateral Line System ◽  
Line System ◽  
A New Species

Schistura papulifera, new species, is described from a cave of the Synrang Pamiang system, Meghalaya State, India. It is distinguished from all other known species of Schistura in having the lower half of the head covered by small skin projections and 5 pores in the supratemporal canal of the cephalic lateral-line system. In addition, it has a white body and vestigial eyes. The closest epigean relative of S. papulifera has not yet been identified due to the lack of survey and usable data. The identity of the cave nemacheiline from Siju Cave is briefly discussed, but this remains inconclusive, again due to the lack of material and usable data.

Schistura papulifera, a new species of cave loach from Meghalaya, India (Teleostei: Balitoridae)

Zootaxa ◽  
2007 ◽  
Vol 1393 (1) ◽  
pp. 35-44 ◽  
Author(s):  
MAURICE KOTTELAT ◽  
DANIEL R. HARRIES ◽  
GRAHAM S. PROUDLOVE
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Lower Half ◽  
Lateral Line System ◽  
Line System ◽  
A New Species

Schistura papulifera, new species, is described from a cave of the Synrang Pamiang system, Meghalaya State, India. It is distinguished from all other known species of Schistura in having the lower half of the head covered by small skin projections and 5 pores in the supratemporal canal of the cephalic lateral-line system. In addition, it has a white body and vestigial eyes. The closest epigean relative of S. papulifera has not yet been identified due to the lack of survey and usable data. The identity of the cave nemacheiline from Siju Cave is briefly discussed, but this remains inconclusive, again due to the lack of material and usable data.

scholarly journals A new species of Moenkhausia (Characiformes: Characidae) from the rio Madeira basin, Brazil, with comments on the evolution and development of the trunk lateral line system in characids

2021 ◽  
Vol 19 (2) ◽  
Author(s):  
Manoela Maria Ferreira Marinho ◽  
Willian Massaharu Ohara ◽  
Fernando Cesar Paiva Dagosta
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Amazon Basin ◽  
Evolutionary Process ◽  
Color Pattern ◽  
Lateral Line System ◽  
Anterior Portion ◽  
Dark Line ◽  
Line System ◽  
A New Species

Abstract A new species of Moenkhausia is described from the rio Machado drainage, Amazon basin, Brazil. It is diagnosed from congeners by its color pattern, consisting of the concentration of chromatophores on the anterior portion of body scales, the horizontally elongate blotch on caudal peduncle, a bright golden coloration of the dorsal portion of eye when alive, and a dark line crossing the eye horizontally. The new species has variable morphology regarding trunk lateral-line canals. Most fully grown individuals do not have enclosed bony tube in many lateral line scales, resembling early developmental stages of tube formation of other species. This paedomorphic condition is interpreted as a result of developmental truncation. Such evolutionary process may have been responsible for the presence of distinct levels of trunk lateral line reductions in small characids. Variation in this feature is common, even between the sides of the same individual. We reassert that the degree of trunk lateral-line tube development must be used with care in taxonomic and phylogenetic studies, because reductions in the laterosensory system may constitute parallel loss in the Characidae. We suggest the new species to be categorized Near Threatened due to the restricted geographical distribution and continuing decline in habitat quality.

A review of the Nemacheilinae genus Oreonectes Gunther with descriptions of two new species (Teleostei: Balitoridae)

Zootaxa ◽  
2008 ◽  
Vol 1729 (1) ◽  
pp. 23 ◽  
Author(s):  
LI-NA DU ◽  
XIAO-YONG CHEN ◽  
JUN-XING YANG
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Lateral Line ◽  
Related Species ◽  
Valid Species ◽  
Lateral Line System ◽  
Genital Papilla ◽  
Line System ◽  
Autonomous Region ◽  
Two New Species

The loach genus Oreonectes is reviewed in this study. Six valid species are recognized, including two new species. Oreonectes polystigmus sp. nov., and Oreonectes microphthalmus sp. nov. are described from the Guangxi Zhuang Autonomous Region, China. Among its congeners, O. polystigmus is most similar to O. platycephalus in morphology. It can be distinguished from all its congeners by an incomplete lateral line with 6–8 pores; a cephalic lateral-line system with 7 supraorbital and 4+7 infraorbital pores; sexual dimorphism (males have a genital papilla located immediately posterior of the anus, and the gonad is opened at the end of a fleshy prominence); and a body with many differently shaped spots. Oreonectes microphthalmus is most similar to O. furcocaudalis in morphology. It can be distinguished from all congeners by its degenerate eyes, which only have black pigment; a cephalic lateral-line system with 2+2 supratemporal, 7 supraorbital, 3+0 infraorbital and 8 preoperculomandibular pores; and an incomplete lateral line with 3 pores. A key to all valid Oreonectes species is provided. The validity of some related species is discussed. Nemacheilus liboensis, Oreonectes liboensis and Oreonectes translucens are all proved to be synonyms of Paracobitis longibarbatus, and Paracobitis longibarbatus is actually a species of Triplophysa.

A new species of the genus Garra Hamilton (Teleostei: Cyprinidae) from Northeast India

Zootaxa ◽  
2019 ◽  
Vol 4619 (3) ◽  
pp. 545-554
Author(s):  
NARENGBAM RONI ◽  
YENGKHOM CHINGLEMBA ◽  
YUMNAM RAMESHORI ◽  
WAIKHOM VISHWANATH
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Lateral Surface ◽  
Anterior Margin ◽  
Lateral Lobe ◽  
Northeast India ◽  
Median Lobe ◽  
River Drainage ◽  
Barak River ◽  
A New Species

A new species of Garra with a rostral proboscis is described from the Barak River drainage in Manipur, India. Garra paratrilobata, new species, is distinguished from its congeners in having the combination of the following characters: a prominent trilobed proboscis, the median lobe with 5–7 uni- to tricuspid tubercles on its anterior margin and 4–6 minute tubercles on its anteroventral margin; lateral lobe of the proboscis with 3–4 minute tubercles; lateral surface of the snout lobular, with 6–9 tubercles; 33–34 lateral-line scales; and the rostral surface concave, creased and depressed. 

A new species of rheophilic cyprinid fish (Teleostei: Cyprinidae) from the Brahmaputra Basin, northeast India

Zootaxa ◽  
2019 ◽  
Vol 4695 (2) ◽  
pp. 148-158
Author(s):  
BUNGDON SHANGNINGAM ◽  
LAISHRAM KOSYGIN ◽  
BIKRAMJIT SINHA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Northeast India ◽  
Cyprinid Fish ◽  
Arunachal Pradesh ◽  
Northeastern India ◽  
Brahmaputra Basin ◽  
A New Species

A new species of the genus Garra is described from the Ranga River of the Brahmaputra basin, Arunachal Pradesh, northeastern India. Garra magnacavus, new species, differs from its congeners in having an incipient proboscis with a transverse lobe, 15−19 rounded large pits on the snout, weakly developed non-fleshy central callous pad, and an elongate body with 42 lateral-line and 14−16 predorsal scales. 

Taxonomic and morphological revision of butterfly rays of the Gymnura micrura (Bloch & Schneider 1801) species complex, with the description of two new species (Myliobatiformes: Gymnuridae)

Zootaxa ◽  
2017 ◽  
Vol 4332 (1) ◽  
pp. 1 ◽  
Author(s):  
LEANDRO YOKOTA ◽  
MARCELO RODRIGUES DE CARVALHO
Keyword(s):  
New Species ◽  
Lateral Line ◽  
The Other ◽  
External Morphology ◽  
Valid Species ◽  
Lateral Line System ◽  
Western Atlantic ◽  
Line System ◽  
Lower Lip ◽  
Two New Species

An extensive taxonomic revision of Gymnura micrura based on external and internal morphology, and considering specimens from its entire geographical distribution in the Atlantic Ocean, is presented. Gymnura micrura is redescribed and a neotype is designated; its distributional range is limited to the Southwestern Atlantic. Two new species of butterfly rays are described: Gymnura lessae, sp. nov., occurring in the North and Central Western Atlantic, and Gymnura sereti, sp. nov., found in the Eastern Central Atlantic. The three species are morphologically very similar (with G. micrura most similar to G. lessae, sp. nov.) and cannot be distinguished based on the primary diagnostic characters typically utilized for butterfly rays. The dorsal color, smaller size and eventual presence of a dorsal fin in some males may be helpful to distinguish G. micrura, whereas the size and morphology of the clasper are the main external characters separating G. sereti, sp. nov., from the other two species, although the shape of disc (especially among adult males) and contour of the lower lip are also helpful. Despite the skeleton being conservative among the species, we found consistent variations that support the validity of the new species described. Due to similarity in external morphology these internal characters were fundamental to discriminate the new species. The scapulocoracoid was an important diagnostic skeletal structure, exhibiting a series of variations that separated the three species. Variations in the synarcual, outline of the dorsal cranial fontanelle, number and shape of mesopterygia, and small differences in the mandibular arches and pelvic girdle were useful to diagnose G. sereti, sp. nov. The contour of the hyomandibula was an important diagnostic character distinguishing G. lessae, sp. nov., from the other two species. Meristic data were also useful, with G. sereti, sp. nov., presenting a lower number of radials in the second element of the mesopterygium and a higher number of diplospondylous vertebrae. In contrast, G. lessae, sp. nov., presented a higher number of pectoral-fin radials. Subtle, but consistent differences, were also found in the design of the ventral lateral-line system. A Canonical Discriminant Analysis provides strong statistical support for the validity of the new species, significantly distinguishing the three species groupings (p < 0.00001). External morphology, ventral lateral-line system and skeleton are described and illustrated for all three valid species. 

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