Cichlid Room Companion

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News on cichlids


image 09-Sep-2022

A new species of Mikrogeophagus described A new species of Mikrogeophagus described
By Juan Miguel Artigas Azas

A new species of Mikrogeophagus from Brazil has been described as Mikrogeophagus maculicauda by Wolfgang Staeck, Felipe Ottoni, and Ingo Schindler in the journal Fishtaxa 2022(24):49-58, published today. The new species is known from the Rio Pindaituba, a right-hand affluent of the Rio Guaporé in the Amazon drainage, from there the closely related Mikrogeophagus altispinosus is known. M. maculicauda mainly differs from the latter species by having a conspicuous large rectangular or square black blotch extending almost over the entire caudal region of the body. The authors made the case that although very similar, the recognition of M. maculicauda as a new species is granted based on the differences in the black color pattern — in this case, the diagnostic black blotch in the caudal peduncle — since this is one of the most frequently applied separating characters in species descriptions of South American cichlids, as even minor deviations in the patterns of dark markings may be of biological significance as they are important in mate choice, effectively separating species.

Staeck, Wolfgang & Felipe Polivanov Ottoni, Ingo Schindler. 2022. "Mikrogeophagus maculicauda, a new dwarf cichlid (Teleostei: Cichlidae) from the eastern drainage of the upper Rio Guaporé, Brazil". Fishtaxa. (24):49-58 (crc12052) (abstract)

image 25-Aug-2022

A new species of oscar described A new species of oscar described
By Juan Miguel Artigas Azas

A new species of oscar, Astronotus mikoljii, has been recently described from populations in the Orinoco river drainage in Colombia and Venezuela, previously identified as Astronotus ocellatus. The new description is authored by Alfredo Perez Lozano, Oscar M. Lasso-Alcalá, Pedro Senna Bittencourt, Donald Charles Taphorn, Nayibe Perez & Izeni Pires Farias and published in the journal Zookeys — (1113):111-152. DOI: 10.3897/zookeys.1113.81240. The description is an example of a new trend of species delimited by mathematical algorithms applied to DNA sequences. In applying this type of methodology to 24 specimens of Astronotus (five from Venezuela, seven A. crassipinnis, and 12 A. ocellatus) plus other DNA sequences previously obtained, the authors have determined that there are five species out of the previously recognized two. To establish a diagnosis for this species that would tell it apart from the others, the authors have recurred to a combination of skeletal differences, mainly in the otolith (earstones) that allows fish to hear and keep balance — earstones are commonly used by ichthyologists to identify species. Morphologically, the new species is just marginally different from A. ocellatus and A. crassipinnis, mainly in average values (with one digit percentage differences) of the snout, head depth, and eye sizes, which means that a regular observer (even one familiar with cichlids) would not likely be able to tell it apart from the common oscar by following the diagnosis and looking at it.

Perez Lozano, Alfredo & Oscar M. Lasso-Alcalá, Pedro Senna Bittencourt, Donald Charles Taphorn, Nayibe Perez, Izeni Pires Farias, Alfredo Perez. 2022. "A new species of Astronotus (Teleostei, Cichlidae) from the Orinoco River and Gulf of Paria basins, northern South America". Zookeys. (1113):111-152. DOI: 10.3897/zookeys.1113.81240 (crc11986) (abstract)

image 11-Aug-2022

A new species of Geophagus described A new species of Geophagus described
By Juan Miguel Artigas Azas

A new species of Geophagus has been described by Gabriel de Carvalho Deprá, Willian Massaharu Ohara & Hugmar Pains Silva in the journal Zootaxa (5162 (1): 037–053). The new species, Geophagus pyrineusi, is endemic to the lower rio Teles Pires and its tributary, the rio Cristalino, rio Tapajós basin in the Brazilian Amazon drainage. This species differentiates from all Geophagus by its body marks, among other things by having the two frontal flank bars almost as dark as the mid-lateral spot, and as dark as the conspicuous, complete bar that crosses the eye. The name given is to honor Antônio Pyrineus de Sousa, who first collected the species and was a pioneer of Brazilian ichthyology.

Deprá, Gabriel de Carvalho & Willian Massaharu Ohara, Hugmar Pains Silva. 2022. "Geophagus pyrineusi: a new species from the rio Teles Pires, rio Tapajós basin, Brazil (Cichliformes: Cichlidae: Geophagini)". Zootaxa. 5162 (1): 037–053. DOI: 10.11646/ZOOTAXA.5162.1.2 (crc11972) (abstract)

image 26-May-2022

Revision of Ctenochromis published Revision of Ctenochromis published
By Juan Miguel Artigas Azas

A revision of the African genus Ctenochromis by Martin J. Genner and seven other researchers, based on nuclear DNA and morphological comparisons, has been published in the European Journal of Taxonomy (819: 23–54). In this revision, the genus is diagnosed and limited to two species from Tanzania: Ctenochromis pectoralis from the Pangani drainage, and the new Ctenochromis scatebra, known from the Chemka Springs. The two species are distinguished by C. scatebra mature adult males having at least one clear non-ocellated egg spot on the anal fin (versus none). The name given to the new species stems from Latin, meaning spring.

The rest of the species previously in Ctenochromis are classified in the following way: a new monotypic genus Shuja (meaning warrior in Swahili) is described for the Lake Tanganyika species previously known as C. horei (now Shuja horei). The species C. oligacanthus, C. polli, and C. benthicola are provisionally reclassified in the genus Haplochromis.

Genner, Martin & L.-L. Hsu, R.A. Collins, A.M. Smith, A.D. Saxon, A.H. Shechonge, B.P. Ngatunga, G.F. Turner. 2022. "Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania". European Journal of Taxonomy. 819:23–54. DOI: 10.5852/ejt.2022.819.1775 (crc11886) (abstract)

image 03-Apr-2022

A new species of Congochromis is described A new species of Congochromis is described
By Juan Miguel Artigas Azas

A new species of Congochromis, C. rotundiceps, only known from the Malebo Pool in the main course of the Congo River in the Democratic Republic of Congo has been described in the journal Zootaxa by Nadine Usimesa Wingi, F.D.B. Schedel, and U.K. Schliewen [5124(3):296-320 03-Apr-2022]. The new species is based on specimens stored in the collection of the Royal Museum for Central Africa in Tervuren, which were collected by J.G. Lambert in 1967. The new species is diagnosed by a convoluted combination of morphologic characters against all currently accepted species of Congochromis. The name given rotundiceps derives from Latin, meaning round-headed (an adjective), and refers to the widely rounded head of the new species.

Wingi, Nadine Usimesa & F.D.B Schedel, U.K. Schliewen. 2022. "Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage". Zootaxa. 5124(3):296-320. DOI: 10.11646/ZOOTAXA.5124.3.2 (crc11869) (abstract)

image 23-Mar-2022

A new species of Steatocranus is described A new species of Steatocranus is described
By Juan Miguel Artigas Azas

A new species of Steatocranus: S. masalamasoso has been described in the journal Ichthyological Explorations of Freshwaters (IEF-1130:1-11. DOI: 10.23788/IEF-1130) by Armel Ibala Zamba, Juliane D. Weiss, Victor Mamonekene, Ulrich K. Schliewen, and Emmanuel Vreven. The new species is only known from the type locality at the right bank of the Masala Ma Soso Rapids on the Lower Léfini River, which is a right bank tributary of the Middle Congo in the Republic of the Congo, at about 10 km to their confluence. The species differentiates from all other Steatocranus species by having more circum-peduncular scales (18-20 versus 12-16).

Ibala Zamba, Armel & Juliane D. Weiss, Victor Mamonekene, Ulrich K. Schliewen, Emmanuel Vreven. 2022. "Steatocranus masalamasoso, a new species of lionhead cichlid from the Léfini River basin, Congo basin, Africa (Teleostei: Cichlidae)". Ichthyological Explorations of Freshwaters. IEF-1130:1-11. DOI: 10.23788/IEF-1130 (crc11870) (abstract)

image 22-Oct-2021

Two new species of shell-dwelling Lake Malawi cichlids described Two new species of shell-dwelling Lake Malawi cichlids described
By Juan Miguel Artigas Azas

Two new species of small shell-dwelling mbuna cichlids from Lake Malawi have been described in the journal Zootaxa (5052(3):419–432 — 15-Oct-2021) by Torin A. Miller, Ad Konings and Jay Stauffer. The two new species were placed in the genus Metriaclima —the most speciose mbuna genus— because of the angle of their snouts (around 45°) and having bicuspid teeth in the central portion of the outer row of both upper and lower jaws. The species were given the names Metriaclima ngarae and M. gallireyae, the specific names reflecting on their type localities in rocky reefs in the northwestern coastal area of the Lake in Malawi. Both species were previously known with the provisional name Metriaclima sp. 'lanisticola north', and have separated very limited distributions in a couple of reefs each. Both species have a black sub marginal band in the dorsal and anal fins, and 4–5 bars below the dorsal fin that distinguishes them from most other species in Metriaclima. The two new species differ from each other in coloration and head proportions. Both species live in sandy areas and protect themselves in abandoned snail shells.

Miller, Torin A & Adrianus F. Konings, Jay R. Stauffer. 2021. "Descriptions of two new shell-dwelling species of Metriaclima (Cichlidae) from Lake Malawi, Africa". Zootaxa. 5052(3):419–432. DOI: 10.11646/zootaxa.5052.3.7 (crc11726) (abstract)

image 20-May-2021

Dr. Wayne S. Leibel Dr. Wayne S. Leibel
By Juan Miguel Artigas Azas

The cichlid world has lost one of its most prominent figures, and many people has lost a dear friend.

Artigas Azas, Juan Miguel. 2021. "Dr. Wayne S. Leibel". The Cichlid Room Companion (crc11208) (abstract)

image 04-Mar-2021

Amatitlania siquia, recognized as junior synonym of Amatitlania nigrofasciata Amatitlania siquia, recognized as junior synonym of Amatitlania nigrofasciata
By Juan Miguel Artigas Azas

Bagley et al. (2016) prove that Amatitlania siquia is a junior synonym of A. nigrofasciata, but have not declared it so. Artigas Azas (2021:18) has recognized the synonymy and we are adopting it in our catalog.

Artigas Azas, Juan Miguel. 2021. "The convict cichlid Amattlania nigrofasciata with comments about the synonymy of A. siquia". Cichlid News Magazine. 30(2):12-19 (crc11178) (abstract)

image 04-Feb-2021

New species of Hemichromis described New species of Hemichromis described
By Juan Miguel Artigas Azas

A work on the five-spotted group of Hemichromis from West Africa has recently been published in the journal Hydrobiologia, the paper is authored by Arnold Roger Bitja-Nyom, Jean-François Agnèse, Antoine Pariselle, Charles Félix Bilong-Bilong, André Gilles, and Jos Snoeks. The study includes the result of a mitochondrial DNA comparison for three Hemichromis species (fasciatus, frempongi and elongatus) from 100 populations from Senegal east and south to Gabon (no samplings were made in Angola). The resulting phylogenetic tree is formed by two clusters. The first (western and northernmost) cluster produced four clades (subgroups): one of them include what we know as H. fasciatus and H. frempongi, and hence the authors propose the synonymy of the latter with the former. The other three clades are formed by different populations of the southern H. elongatus. The second cluster, formed by three different clades from populations from Cameroon, has been described as a new species, Hemichromis camerounensis, with populations in Cameroon and Nigeria. The diagnosis is given as “two distinct red opercular spots on either side of the single large black opercular spot”. Unfortunately, this diagnosis appears not be applicable since many individuals in the populations of H. elongatus south to Angola show the same feature.

Bitja-Nyom, Arnold Roger & Jean-François Agnèse, Antoine Pariselle, Charles Félix Bilong-Bilong, André Gilles, Jos Snoeks. 2021. "A systematic revision of the five-spotted Hemichromis complex (Cichliformes: Cichlidae) from West Africa and Lower Guinea, with the description of a new species from Cameroon". Hydrobiologia. DOI: 10.1007/s10750-020-04506-5 (crc11122) (abstract)

image 23-Jan-2021

Four new species of Serranochromis described Four new species of Serranochromis described
By Juan Miguel Artigas Azas

Four new species of riverine cichlids in the genus Serranochromis from the Cuanza and Okavango river systems in Angola (to where they are probably endemic) have been described by Jay Stauffer, Paul Skelton and Rober Bills in the journal Zootaxa. The four species, namely Serranochromis alvum (meaning blotches from Latin, in reference to the prominent lateral pigmentation), S. cacuchi (referring the type locality at Cacuchi River), S. cuanza (referring the type locality at Cuanza River) and S. swartzi (after the primary collector Dr. Ernst Swartz - ichthyologist at the South African Institute for Aquatic Biodiversity) differ from each other and other Serranochromis species in a combination of morphological, meristic and color pattern features which include distance between eyes, angle of snout or mouth cleft, presence or not of ocelli in the anal fin, and others. No phylogenetic support based on DNA comparison is offered by the authors.

Stauffer, Jay Richard Jr. & Roger Bills, Paul H. Skelton. 2021. "Four new species of Serranochromis (Teleostei: Cichlidae) from the Cuanza and Okavango river systems in Angola, including a preliminary key for the genus". Zootaxa. 4908(1):66–84. DOI: 10.11646/zootaxa.4908.1.4 (crc11108) (abstract)

image 10-Jan-2021

New species of Lake Malawi cichlid described New species of Lake Malawi cichlid described
By Juan Miguel Artigas Azas

A new species of deep water cichlid of the genus Diplotaxodon endemic to Lake Malawi has been described by Jay R. Stauffer and Ad Konings in the journal Zootaxa. The new species rounds 15 cm in length and was captured off Thumbi East Island in Malawi, at 73 meters depth. The species is distinguished from the rest of the species in Diplotaxodon by a combination of characteristics, none of them unique to the new species. The name given: dentatus, alludes to caniniform teeth which are exposed when the mouth is closed. As other species in the genus, D. dentatus is believed to be a piscivorous due to the specialized dentition and habitat.

Stauffer, Jay Richard Jr. & A.F. Konings. 2021. "A new species of Diplotaxodon (Cichliformes: Cichlidae) from Lake Malawi". Zootaxa. 4903(2):275–284. DOI: 10.11646/zootaxa.4903.2.7 (crc08359) (abstract)

image 24-Jun-2020

A new species of paedophagous Lake Malawi cichlid has been described A new species of paedophagous Lake Malawi cichlid has been described
By Juan Miguel Artigas Azas

A new species of paedophagous cichlid from Lake Malawi has been described by Katrien Dierickx and Jos Snoeks of the Royal Museum for Central Africa [Tervuren]. The new species was previously known as Hemitaeniochromis sp. 'paedophage' and has been named Protomelas krampus. The genus was chosen because the new species has a continuous mid-lateral stripe, versus an anteriorly spotted stripe seen in Hemitaeniochromis. It is diagnosed from most of the species of Protomelas by having only one inner tooth row, versus two rows. The specific name of choice 'krampus' refers to the European folklore character Krampus, a demon who puts naughty children in a bag and takes them away. The species probably has a lake wide distribution in all Lake Malawi coasts but most of the collecting localities so far are found in the central eastern part of the Lake.

Dierickx, Katrien & J. Snoeks. 2020. "Protomelas krampus, a new paedophagous cichlid from Lake Malawi (Teleostei, Cichlidae)". European Journal of Taxonomy. (672):1–18. DOI: 10.5852/ejt.2020.672 (crc09780) (abstract)

image 25-Mar-2020

A new species of Cichla from the Essequibo River described A new species of Cichla from the Essequibo River described
By Juan Miguel Artigas Azas

A new species of Cichla from the Essequibo River channel in Guyana and Venezuela has been described by Mark H. Sabaj Pérez and a group of researchers in the Proceedings of the Academy of Natural Sciences of Philadelphia. The new species, Cichla cataractae, also known as falls Lukunani in Guyana, had been previously identified as Cichla ocellaris, a locally smaller species with which it is syntopic. Unlike Cichla ocellaris, which inhabits ponds and slow water courses, the new species seems to prefer areas of moderate flow and waterfalls, an habit that inspired its specific name (cataractae means waterfall or rapids in Latin). The diagnosis is based in color pattern differences in both juveniles and adults, which distinguish it from all other Cichla species. In adults, the lateral pattern in C. cataractae is dominated by two prominent dark blotches, each one with pale border.

Sabaj Pérez, Mark H & Hernán López-Fernández, Stuart C.Willis, Devya D. Hemraj, Donald C. Taphorn, Kirk O. Winemiller. 2020. "Cichla cataractae (Cichliformes: Cichlidae), new species of peacock bass from the Essequibo Basin, Guyana and Venezuela". Proceedings of the Academy of Natural Sciences of Philadelphia. 167(1):69-86. DOI: 10.1635/053.167.0106 (crc09634) (abstract)

image 20-Jan-2020

Two new genera and species of riverine cichlids from Zambia have been described Two new genera and species of riverine cichlids from Zambia have been described
By Juan Miguel Artigas Azas

Two new species of Pseudocrenilabrini riverine cichlids from Zambia have been described by Frederic D.B. Schedel, V.M.S. Kupriyanov, C. Katongo, and Uldrich Schliewen in the journal Zootaxa. Each one of this species has been given a new monotypic genus. Both relatively recently discovered species species had been found in nuclear and mitochondrial DNA comparisons to belong to ancient evolutive lineages older than any Pseudocrenilabrus species, which has inspired their description in monotypic genera. Their diagnosis relies mainly on subtle differences of their osteology, where the distance between the first two of a series of five small bones under the eye is used. Lufubuchromis relictus is native (as its generic name implies) to the Lufubu River (both above and below the Lufubu hydroelectric dam), which discharges into Lake Tanganyika. The specific name relictus (residue from Latin), refers to the restricted distribution of this species in the isolated upper region of an ancient plateau, where its phylogenetic position as the ancient mitochondrial sister group of all other members of the Pseudocrenilabrus lineage suggests that it represents a relict ancient evolutionary lineage. Palaeoplex palimpsest is known from the Luongo River, a tributary of Luapula River, and from several locations in the Kalungwishi River drainage, both rivers drain into Lake Mweru, and are part of the Congo River drainage. The etymology of this species is as elaborated as the diagnosis; A palaeoplex is a concept in geoecodynamics, the study of changes in geology and ecology in a given area (landscape) over time. A palaeoplex describes the full genetic variation of a given species in a given landscape over a given time, as this genus is believed to have evolved in a particular ancient landscape. A palimpsest is a parchment manuscript page, most commonly used in medieval times, that has been secondarily overwritten after layers of old handwritten letters had been scraped off, sometimes repeatedly.

Schedel, Frederic D. B & V.M.S. Kupriyanov, C. Katongo, U.K. Schliewen. 2020. "Palaeoplex gen. nov. and Lufubuchromis gen. non, two new monotypic cichlid genera (Teleostei: Cichlidae) from northern Zambia". Zootaxa. 4718(2):191–229. DOI: 10.11646/zootaxa.4718.2.3 (crc02709) (abstract)

image 08-Nov-2019

Three snail-eater Haplochromis species from Lake Edward are described Three snail-eater Haplochromis species from Lake Edward are described
By Juan Miguel Artigas Azas

Three recently discovered snail-eater Haplochromis species from Lake Edward, the smallest of the African Rift Lakes located in the border of the Democratic Republic of Congo and Uganda have been described by Nathan Vranken, M. Van Steenberge and Jos Snoeks at the Royal Museum of Central Africa at Tervuren [Belgium] in the Journal of Fish Biology. The new species are Haplochromis concilians, named after its main diagnostic character of having the skin covering the snout thickened and usually merged with the upper lip, conciliare meaning join together in Latin; Haplochromis erutus is diagnosed by a combination of oral characters, its specific name meaning torn-out in Latin, referring to its oral-shelling ecology, in which soft bodies of snails are wrenched or torn out of their shells; The third species, Haplochromis planus differs from all other species of Haplochromis (except H. retrodens from Lake Victoria), by possessing a shallow, broad and rectangular lower jaw, the specific name planus, meaning flat in Latin, refers to its flat, shovel-like lower jaw. All three species are smaller than 12 cm in total length.

Vranken, Nathan & M. Van Steenberge, J. Snoeks. 2019. "Similar ecology, different morphology: Three new species of oral-mollusc shellers from Lake Edward". Journal of Fish Biology. 1–16. DOI: 10.1111/jfb.14107 (crc09510) (abstract)

image 10-Oct-2019

A new monotypic genus for Gobiochromis irvinei is described A new monotypic genus for Gobiochromis irvinei is described
By Juan Miguel Artigas Azas

In a new paper Uli Schliewen and Juliane Weiss have described a new monotypic genus for the rheophilic African cichlid initially described as Gobiochromis irvinei (recently known as Steatocranus irvinei). The new genus was expected since in 2013, Dunz & Schliewen presented a comprehensive molecular phylogeny of haplotilapiine cichlids, where they found that Paragobiocichla irvinei falls well outside the tribe Steatocranini which contains all Confo drainage Steatocranus species, and fits instead in the just far related tribe Gobiocichlini, with its closest relatives being Tilapia busumana and T. pra. It seems then that the superficial similarities between Paragobiocichla irvinei and all Steatocranus species are the result of convergent evolution and not close relatedness. The new genus is soundly diagnosed, with the name given suggesting its close relation with Gobiocichla species from the Volta river drainage.

Weiss, J.D. & F.D.B. Schedel, A. Zamba, Ibala, E.J.W.M.N. Vreven, U.K. Schliewen. 2019. "Paragobiocichla, a new genus name for Gobiochromis irvinei Trewavas, 1943". Spixiana. 42(1):133-139 (crc09446) (abstract)

image 09-Oct-2019

A new species of Thysochromis is described
By Juan Miguel Artigas Azas

A new species of Thysochromis from the Republic of Congo has been described in the Journal of Fish Biology by Gina Walsh, Anton Lamboj and Melanie Stiassny. The new species has its origin in the collection of two specimens collected in 1991 in Lake Koubambi, originally identified as Thysochromis ansorgii, but with a significant distribution disruption. The new species, Thysochromis emili is named after Emil Woolf Kentridge-Young, grandson of William Kentridge and Anne Stanwix, in recognition by the authors of their support of research in Africa. T. emili is diagnosed from T. ansorgii by a combination of characters, which include fewer scale rows between the pectoral and pelvic-fin origins; jaw teeth closely spaced and evenly implanted over entire length of both upper and lower jaws (versus widely spaced and unevenly implanted along distal portions); a supra-occipital crest that is continuous with the frontal ridge (versus terminating posterior to frontal ridge); a shorter post-orbital length and a shorter caudal peduncle length. T. emili is known from well oxygenated lakes and rivers, where it was collected in shallow, clear water shoreline waters fringed by abundant overhanging vegetation. The paper also includes recognizes the synonymy of T. annectens with T. ansorgii.

Walsh, Gina & Anton Lamboj, Melanie L.J. Stiassny. 2019. "Review of the cichlid genus Thysochromis (Teleostei: Ovalentaria) with the description of a new species from the Kouilou Province in the Republic of Congo, west–central Africa". Journal of Fish Biology. DOI: 10.1111/jfb.14144 (crc09445) (abstract)

image 21-Feb-2019

New species of Apistogramma from Colombia described New species of Apistogramma from Colombia described
By Juan Miguel Artigas Azas

A new species of Apistogramma from the lower Atabapo drainage in Colombia has been described by Wolfgang Staeck and Ingo Schindler in the journal Vertebrate Zoology. The new species A. psammophila can be distinguished from all congeners by a combination of characters, including two horizontal stripes on body sides, two pectoral spots, a suborbital stripe becoming much wider ventrally and no caudal spot. The more similar species is Apistogramma diplotaenia. The specific name given to this species is derived from Greek and means “friend of the sand”, in reference the habitat preference of this species.

Staeck, Wolfgang & I, Schindler. 2019. "Apistogramma psammophila – a new geophagine dwarf cichlid (Teleostei: Cichlidae) from the Rio Atabapo drainage in Colombia and Venezuela". Vertebrate Zoology. 69(1):103-110. DOI: 10.26049/VZ69-1-2019-05 (crc09295) (abstract)

image 20-Feb-2019

New species of Gymnogeophagus from Argentina described New species of Gymnogeophagus from Argentina described
By Juan Miguel Artigas Azas

A new species of Gymnogeophagus, G. jaryi from the middle Parana River basin in Misiones, Argentina has been described by Felipe Alonso and a group of ten persons in the journal Plos One. The new species is diagnosed by meristic and color pattern differences with other species of the genus. It is established to be the sister species of G. caaguazuensis from which it differs by a longer caudal peduncle, caudal fin not lyrate, central portion of scales on dorsal portion of trunk light iridescent blue and by white spots in soft portion of dorsal fin in adult males. The specific name given to the new species jaryi means grandmother in Guarani and has been “dedicated to the Non-Governmental Organization of “Abuelas de Plaza de Mayo”, created in 1977 whose objective is to locate and restore to their legitimate families all the children disappeared by the last Argentine dictatorship”. The new species can also be found in adjacent areas in Paraguay.

Alonso, Felipe & G.E. Terán, G. Aguilera, O. Rícan, J. Casciotta, W.S. Serra, A. Almirón, M.F. Benítez, I. García, J.M. Mirande. 2019. "Description of a new species of the Neotropical cichlid genus Gymnogeophagus Miranda Ribeiro, 1918 (Teleostei: Cichliformes) from the Middle Paraná basin, Misiones, Argentina". Plos One. 14(2):e0210166. DOI: 10.1371/journal.pone.0210166 (crc09294) (abstract)