A New Genus of African Loach Catfish (Siluriformes: Amphiliidae) from the Congo River Basin, the Sister-Group to All Other Genera of the Doumeinae, with the Description of Two New Species

Copeia ◽  
2011 ◽  
Vol 2011 (4) ◽  
pp. 477-489 ◽  
Author(s):  
Carl J Ferraris ◽  
Richard P Vari ◽  
Paul H Skelton
Keyword(s):  
New Species ◽  
River Basin ◽  
New Genus ◽  
Sister Group ◽  
Congo River ◽  
Two New Species ◽  
Congo River Basin

New Species ofHemigrammocharax(Characiformes: Distichodontidae) from the Northwestern Congo River Basin

Copeia ◽  
2013 ◽  
Vol 2013 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Fernando C. Jerep ◽  
Richard P. Vari
Keyword(s):  
New Species ◽  
River Basin ◽  
Congo River ◽  
Congo River Basin

African weakly electric fishes of the genus Petrocephalus (Osteoglossomorpha: Mormyridae) of Odzala National Park, Republic of the Congo (Lékoli River, Congo River basin) with description of five new species

Zootaxa ◽  
2010 ◽  
Vol 2600 (1) ◽  
pp. 1 ◽  
Author(s):  
SÉBASTIEN LAVOUÉ ◽  
JOHN P. SULLIVAN ◽  
MATTHEW E. ARNEGARD
Keyword(s):  
New Species ◽  
River Basin ◽  
National Park ◽  
Congo Basin ◽  
Type Material ◽  
Electric Signal ◽  
Congo River ◽  
Mitochondrial Cytochrome B ◽  
Congo River Basin ◽  
Republic Of The Congo

Here we examine new collections of Petrocephalus species (Osteoglossomorpha: Mormyridae: Petrocephalinae) made within Odzala National Park in the Republic of the Congo (Lékoli River drainage, northwestern Congo River basin). We compare these collections to type material of all nominal Petrocephalus species described from the Congo basin and the adjacent Lower Guinea ichthyofaunal province. Based on morphology and electric signal characteristics we recognize eleven distinct species of Petrocephalus in these collections, including five new species described herein: Petrocephalus binotatus, Petrocephalus zakoni n. sp., Petrocephalus valentini n. sp., Petrocephalus balayi, Petrocephalus microphthalmus, Petrocephalus odzalaensis n. sp., Petrocephalus christyi, Petrocephalus sauvagii, Petrocephalus pulsivertens n. sp., Petrocephalus grandoculis and Petrocephalus mbossou n. sp. Each species can be distinguished by a combination of characters, the most important of which are numbers of dorsal and anal fin rays, mouth width, eye size, number of upper jaw teeth and melanin markings. Electric signal waveform characteristics are useful for diagnosing a few of the species. The eleven Petrocephalus species of the Odzala assemblage appear to be reproductively isolated biological species based on genetic evidence we have gathered from the mitochondrial cytochrome b gene. Our study of Petrocephalus type material reveals that Petrocephalus guttatus was erroneously assigned to this genus; we now assign this species to Pollimyrus within the sister subfamily, Mormyrinae. Additionally, we provide a dichotomous key to the eleven Petrocephalus species of Odzala National Park.

Magosternarchus, a New Genus with Two New Species of Electric Fishes (Gymnotiformes: Apteronotidae) from the Amazon River Basin, South America

Copeia ◽  
1996 ◽  
Vol 1996 (3) ◽  
pp. 657 ◽  
Author(s):  
John G. Lundberg ◽  
Cristina Cox Fernandes ◽  
James Spurling Albert ◽  
Marcelo Garcia
Keyword(s):  
New Species ◽  
South America ◽  
River Basin ◽  
New Genus ◽  
Amazon River ◽  
Amazon River Basin ◽  
Two New Species ◽  
Electric Fishes

Morphology and phylogenetic relationships of a remarkable new genus and two new species of Neotropical freshwater stingrays from the Amazon basin (Chondrichthyes: Potamotrygonidae)

Zootaxa ◽  
2011 ◽  
Vol 2776 (1) ◽  
pp. 13 ◽  
Author(s):  
MARCELO R. DE CARVALHO ◽  
NATHAN R. LOVEJOY
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Phylogenetic Relationships ◽  
Amazon Basin ◽  
New Genus ◽  
Sister Group ◽  
Two New Species ◽  
Anterior Extension ◽  
Molecular Phylogenetic ◽  
Molecular Patterns

The morphology and phylogenetic relationships of a new genus and two new species of Neotropical freshwater stingrays, family Potamotrygonidae, are investigated and described in detail. The new genus, Heliotrygon, n. gen., and its two new species, Heliotrygon gomesi, n. sp. (type-species) and Heliotrygon rosai, n. sp., are compared to all genera and species of potamotrygonids, based on revisions in progress. Some of the derived features of Heliotrygon include its unique disc proportions (disc highly circular, convex anteriorly at snout region, its width and length very similar), extreme subdivision of suborbital canal (forming a complex honeycomb-like pattern anterolaterally on disc), stout and triangular pelvic girdle, extremely reduced caudal sting, basibranchial copula with very slender and acute anterior extension, and precerebral and frontoparietal fontanellae of about equal width, tapering very little posteriorly. Both new species can be distinguished by their unique color patterns: Heliotrygon gomesi is uniform gray to light tan or brownish dorsally, without distinct patterns, whereas Heliotrygon rosai is characterized by numerous white to creamy-white vermiculate markings over a light brown, tan or gray background color. Additional proportional characters that may further distinguish both species are also discussed. Morphological descriptions are provided for dermal denticles, ventral lateral-line canals, skeleton, and cranial, hyoid and mandibular muscles of Heliotrygon, which clearly corroborate it as the sister group of Paratrygon. Both genera share numerous derived features of the ventral lateral-line canals, neurocranium, scapulocoracoid, pectoral basals, clasper morphology, and specific patterns of the adductor mandibulae and spiracularis medialis muscles. Potamotrygon and Plesiotrygon are demonstrated to share derived characters of their ventral lateral-line canals, in addition to the presence of angular cartilages. Our morphological phylogeny is further corroborated by a molecular phylogenetic analysis of cytochrome b based on four sequences (637 base pairs in length), representing two distinct haplotypes for Heliotrygon gomesi. Parsimony analysis produced a single most parsimonious tree revealing Heliotrygon and Paratrygon as sister taxa (bootstrap proportion of 70%), which together are the sister group to a clade including Plesiotrygon and species of Potamotrygon. These unusual stingrays highlight that potamotrygonid diversity, both in terms of species composition and undetected morphological and molecular patterns, is still poorly known.

First amber fossils of the extinct family Protopsyllidiidae, and their phylogenetic significance among Hemiptera

2003 ◽  
Vol 34 (3) ◽  
pp. 329-344 ◽  
Author(s):  
David Grimaldi
Keyword(s):  
New Species ◽  
New Genus ◽  
Sister Group ◽  
First Record ◽  
Western Hemisphere ◽  
Late Permian ◽  
Phylogenetic Significance ◽  
The Family ◽  
Two New Species ◽  
Insight Into

AbstractTwo new species of a new genus, Postopsyllidium rebeccae and P. emilyae, are described, which are preserved in amber from northern Myanmar and central New Jersey, USA (100-90 myo), respectively. These are the first specimens of the hemipteran family Protopsyllidiidae found in amber and the latest occurrence of the family, some 50 my later than previous records; all others are compressions in rocks (many of them just wings) from the Late Permian to the Early Cretaceous. Postopsyllidium emilyae is also the first record of the group from the Western Hemisphere. A catalogue of Protopsyllidiidae is provided as well as an hypothesis of phylogenetic relationships among genera, though monophyly of the family is ambiguous. Postopsyllidium appears to be a recently derived genus, and four genera are removed from the family. Complete preservation in amber allows new insight into relationships, specifically that Postopsyllidium, and perhaps most or all Protopsyllidiidae, represent an extinct sister group to the Sternorrhyncha that retain features of some Auchenorrhyncha. Radiations of true Sternorrhyncha began in the Jurassic and Cretaceous, by which time the Protopsyllidiidae were apparently already relicts.

New Species of Congoglanis (Siluriformes: Amphiliidae) from the Southern Congo River Basin

Copeia ◽  
2012 ◽  
Vol 2012 (4) ◽  
pp. 626-630 ◽  
Author(s):  
Richard P. Vari ◽  
Carl J. Ferraris ◽  
Paul H. Skelton
Keyword(s):  
New Species ◽  
River Basin ◽  
Congo River ◽  
Congo River Basin

Ternatus, a new spider genus from China with a cladistic analysis and comments on its phylogenetic placement (Araneae: Linyphiidae)

Zootaxa ◽  
2012 ◽  
Vol 3358 (1) ◽  
pp. 28
Author(s):  
NING SUN ◽  
BIN LI ◽  
LIHONG TU
Keyword(s):  
New Species ◽  
New Genus ◽  
Cladistic Analysis ◽  
Sister Group ◽  
Morphological Data ◽  
Sister Group Relationship ◽  
Phylogenetic Placement ◽  
Two New Species ◽  
Cladistic Analyses

A new spider genus, Ternatus n. gen., is erected to accommodate two new erigonine species from China, Ternatus malleatusn. sp. and Ternatus siculus n. sp. Descriptions and illustrations of the new genus and new species are provided. To test the phy-logenetic placement within Linyphiidae, morphological data of the two new species were added to the matrices of two previousstudies addressing the higher level phylogeny of erigonine spiders. The results of the cladistic analyses support the monophyly of the new genus and its sister group relationship to the genus Gonatium Menge, 1868.

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