Anton Lamboj

• Dr. Mag.
• Lecturer at University of Vienna

The tribe Hemichromini is an early diverging, mainly Central and West African lineage within the species-rich African cichlid fishes (Cichliformes, Cichlidae) including two genera, Hemichromis Peters 1858 and the monotypic Anomalochromis Greenwood 1985. Though many of the species are popular aquarium fish, the number of hemichromine species is stil...

Parananochromis moutingae, new species, is the first species of Parananochromis to be recorded as endemic to the Congo Basin. It is recorded from the Lefini, Lebomo, and Mayi Ndombe Rivers in the middle Congo. Paranano- chromis moutingae is distinguished from all congeners by a unique combination of the following meristic and morphological characte...

Using all data sources available, we collected 2,189 nominal scientific names that have been applied to the fishes from Gabon. Data from the literature and online database indicate that 1,062 valid species of fishes live in Gabonese waters, with 288 of these strictly restricted to freshwaters, 592 strictly restricted to marine environments and 182...

Remote sensing has become an integral and invaluable tool to inform biodiversity conservation and monitoring of habitat degradation and restoration over time. Despite the disproportionately high levels of biodiversity loss in freshwater ecosystems worldwide, ichthyofauna are commonly overlooked in favor of other keystone species. Freshwater fish, a...

Remote sensing, through satellite image analysis has become an integral and invaluable tool to inform biodiversity conservation and monitoring of habitat degradation and restoration over time. Despite the disproportionately high levels of biodiversity loss in freshwater ecosystems worldwide, ichthyofauna are commonly overlooked in favor of other ke...

A new species of the chromidotilapiine genus Thysochromis, is described from the Noumbi and Kouilou River drainages in the Republic of Congo. Based on the current investigation, Thysochromis is resolved as containing two geographically disjunct species, T. ansorgii from localities in the upper Guinean ichthyofaunal province (Ivory Coast, Ghana, Ben...

The Danakil Depression of northeastern Africa is among the harshest environments on Earth. Yet, despite extreme aridity, this desert region hosts the endemic cichlid genus Danakilia. As currently recognized, the genus includes at least two populations of Danakilia franchettii from groundwater springs feeding Lake Afrera (Ethiopia), one population o...

Unnoticed by the public, initiatives for oil exploration are advanced in Africa’s largest freshwater reservoirs, including Lakes Tanganyika, Malawi and lately Albert, threatening their ecosystems and biota. It is imperative that environmental impact assessments are conducted by independent organizations to ensure that decisions on this matter are b...

As the world’s demands for hydrocarbons increase, remote areas previously made inaccessible by technological limitations are now being prospected for oil and gas deposits. Virtually unnoticed by the public, such activities are ongoing in the East African Great Lakes region, threatening these ecosystems famed for their hyper-diverse biota, includin...

A new genus, Wallaceochromis, is described for the chromidotilapiine cichlids of the Pelvicachromis humilis group. It differs from Pelvicachromis sensu stricto in the number and arrangement of tubular infraorbitals, a straighter and sloping dorsal head profile with a low supraoccipital crest, higher abdominal vertebral counts (14-15 vs. 13-14), and...

The African cichlid genus Hemichromis represents a conundrum of a taxonomic problem since decades, as it exhibits considerable morphological conservatism in external traits. Species delineation among several species was particularly misconceived among various workers. Recently and following Loiselle‘s 1979 revision of the genus, two groups are to r...

Parananochromis elobatus, new species, is an elongate species distinguished from congeners by the combination of: three tubular infraorbital bones, scales absent from the chest, a weakly developed pharyngeal pad, and short dorsal fin lappets. Parananochromis orsorum, new species, is diagnosed by the presence of four tubular infraorbitals, pelvic fi...

Abstract. – Sixty-six specimens of seven populations of the Pelvicachromis taeniatus-group are compared and examined, using molecular and anatomical-morphological methods as well as coloration patterns. Accordingly, the taxon P. taeniatus is restricted to populations from benin and Nigeria. For most populations from Cameroon the old taxon P. kriben...

Chromidotilapiine cichlid fishes (Teleostei: Cichlidae) of West and Central Africa represent the most species rich ancient African cichlid lineage. In contrast to the mega-diverse haplotilapiine cichlids from the African rift valley and crater lakes, very little is known about their phylogenetic history. Based on mitochondrial and nuclear DNA seque...

The process of ecological speciation drives the evolution of locally adapted and reproductively isolated populations in response to divergent natural selection. In Southern Mexico, several lineages of the freshwater fish species of the genus Poecilia have independently colonized toxic, hydrogen sulfide-rich springs. Even though ecological speciatio...

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The genus Pelvicachromis sensu Thys van den Audenaerde, 1968, contains 10 described species. one additional species is known from a colour slide at least since 1968, as mentioned in Thys van den Audenaerde (1968). Thys van den Audenaerde received the slide from W. Heiligenberg and transported the species under the name P. sp. affin. subocel-latus,...

Pelvicachromis sacrimontis Paulo, 1977 was originally described on the basis of an iconotype in an aquarium journal. Herein, the validity of the name as well as the species status is discussed, an updated diagnosis and description of the species is given, and a neotype and a series of paraneotypes is designated. The species differs from congeners i...

AbstrACt. -Congochromis robustus, a new cichlid species, is described from the Central Congo basin. It differs from its congeners by its larger size and a combination of morphological characters: greater cheek depth, greater snout length, smaller eye orbit diameter and smaller postorbital length. résumé. -Une nouvelle espèce de cichlidé du genre Co...

A new species of cichlid fish is described from a small, endorheic lake (Lake Abaeded), situated some 30 m below sea level in the Danakil Depression of Eritrea (East Africa). Danakilia dinicolai is readily distinguished from its congener, D. franchettii, on the basis of body proportions and in the possession of markedly longer pectoral fins at all...

Enigmatochromis lucanusi, a new cichlid genus and species, is described from Guinea (West Africa). It is a member of the chromidotilapiine cichlid clade, and differs from other genera within the group in a combination of morphological characters and coloration patterns; e.g., twelve circumpeduncular scales; three tubular infraorbital bones in addit...

Nanochromis teugelsi, new species, is described from the Kasai Region and the main channel of the Congo as far upstream as Lake Tumba. It differs from N. dimidiatus, N. sabinae, and N. squamiceps in lacking a supraneural bone and in lacking scales on the nape, cheek and chest. It has a more elevated upper lateral line, contiguous to the dorsal-fin...

Nanochromis sabinae, a new cichlid species, is described from central and northeast Congo (Brazzaville) and southeast Gabon. It is differs from congeners in a combination of morphological characters and coloration patterns; e.g. anterior region of upper lateral line clearly separated from the dorsal-fin base; posterior nape scaled; one or two rows...

Pelvicachromis rubrolabiatus and P. signatus are described from Guinea. They differ from other members of Pelvicachromis, except P. humilis, in having two contiguous tubular infraorbital ossi- cles instead of three with a gap between the 2 nd and 3rd and in displaying a color pattern of seven to eight dark vertical bars during certain behavioral si...

Lamboj, Anton (2004): cichlid species (Teleostei, Perciformes) from Guinea, West Africa. Zootaxa 454: 1-12, DOI: 10.5281/zenodo.157489

Parananochromis axelrodi , P. brevirostris and P. ornatus, three new cichlid species, are described from Gabon and southern Cameroon. Parananochromis axelrodiis a deep-bodied species differing from congeners in a combination of morphometric and meristic characters. Parananochromis brevi- rostris and P. ornatus are distinguished by the presence of f...

Chromidotilapia melaniae and C. nana, two new cichlid species, are described from southern Gabon and the southern parts of the Ogooue-River system in Gabon. C. melaniae differs from congeners by a combination of coloration, morphometric and meristic characters. C. nana is the smallest known species of the genus and is distinguished from congeners i...

Limbochromis cavalliensis is shown to be a member of Chromidotilapia, diagnosed by some morphologi- cal features, for instance the number of infraorbital bones, the number of openings of the laterosensory canal in the lachrymal bone, the shape of the pelvic fin in females and the number of scales between the upper lateral line scale series to the b...