Two New Species of Guianacara from the Guiana Shield of Eastern Venezuela (Perciformes: Cichlidae)

López‐Fernández, Hernán; Baechle, Donald C. Taphorn; Kullander, S.

doi:10.1643/0045-8511(2006)2006[384:tnsogf]2.0.co;2

Cited by 10 publications

(8 citation statements)

References 6 publications

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“…Acarichthyina is the least species‐rich geophagin subtribe. Acarichthys is monotypic and Guianacara has five species (Kullander, 2003; López‐Fernández et al., 2006). The monophyly of this subtribe has been corroborated in several molecular and combined studies (Farias et al., 1999, 2000; López‐Fernández et al., 2005a,b), and there is ample evidence for the monophyly of Guianacara and its separation from its historical ally Aequidens (Kullander and Nijssen, 1989; Kullander, 1998; López‐Fernández et al., 2006).…”

Section: Discussionmentioning

confidence: 99%

Phylogeny, taxonomy, and evolution of Neotropical cichlids (Teleostei: Cichlidae: Cichlinae)

2008

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Section: Discussionmentioning

confidence: 99%

Phylogeny, taxonomy, and evolution of Neotropical cichlids (Teleostei: Cichlidae: Cichlinae)

2008

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“…For example, Guianacara, although the sister group to Mazarunia, has a rather stereotyped morphology that makes differences between species very subtle (e.g. López-Fernández et al, 2006;Arbour & López-Fernández, 2011). Differences in the lower pharyngeal jaw are particularly interesting, because they may suggest differences in trophic ecology as well.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species

López‐Fernández¹,

Taphorn²,

Liverpool³

2012

Neotrop. ichthyol.

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We expand the description of the genus Mazarunia Kullander, 1990, explore morphological diagnostic characters for the genus and for its sister-group relationship with Guianacara Kullander & Nijssen, 1989 in a phylogenetic context, expand the description of M. mazarunii and describe two new species. Mazarunia can be diagnosed by the combination of numerous anatomical traits, including the unique loss of infraorbital 6, the configuration of the first epibranchial in two of the species, a well-developed posteroventral lateral expansion of the palatine that is largely contiguous with the ectopterygoid, the absence of a suture between the hyomandibular and the metapterygoid, the absence of an interarcual cartilage, fourth ceratobranchial with 2 or 3 tooth plates, a caudally scaled interoperculum, equal-sized scales in the ventral and lateral chest regions, a simple, disjunct pattern of lateral line squamation, and smooth preopercle, supracleithrum and extrascapula. Species of Mazarunia can be further distinguished from species of their sistergenus Guianacara by their distinct color patterns. Mazarunia charadrica, new species, can be distinguished from other species of Mazarunia, among other characters, by approximately equal uncinate process and anterior arm and reduced anteroventral expansion of epibranchial 1 (vs. uncinate process narrower and complete anteroventral expansion in the other two species), a dorso-ventrally flattened maxillary process of the palatine (vs. cylindrical in the other two species), cycloid (vs. ctenoid) scales in the opercular, postorbital, lateral chest and anal-genital regions, the absence of a mid-lateral spot, and a diffuse dark area covering the dorsal portion of the head giving the impression of a "black cap". Mazarunia charadrica has a unique juvenile pattern of seven vertical dark bars partially preserved in adults. Bars 3-6 in antero-caudal direction are most visible in juveniles and medium-sized specimens but become fainter and almost disappear in adults. Many specimens show only bar number 3 (midlateral bar). Mazarunia mazarunii can be distinguished from all other species of Mazarunia by the presence of two foramina (vs. one) on the lateral face of the ascending process of the premaxilla, a lachrymal bone that is longer than deep (vs. deeper than long), an infraorbital 3 that is contiguous but not overlapping with the lachrymal (vs. overlapping), ctenoid scales (vs. cycloid) on the subopercle, interopercle and chest, and by its unique coloration, including complete suborbital and supraorbital stripes, and being the only species of Mazarunia with a discernible lateral band formed by the mid-line blotching pattern associated with lateral bars. In large adults, M. mazarunii has a black or dark bar behind the head that produces the impression of a collar. Mazarunia pala, new species, can be distinguished from its congeners by the absence of a parhypurapophysis, the presence of a dorsal-fin scaly pad with ctenoid scales (vs. no scaly pad in M. charadrica and M. mazarunii), a small sub...

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“…Counts are expressed as the observed count followed by the number of individuals examined that had that value in parenthesis, with the holotype value indicated with a *. Descriptions of the midlateral bar and the midlateral spot follow López-Fernández et al (2006). Ontogenetic change in pigmentation patterns is described when necessary as juvenile specimens from all species generally exhibit a dark, predominantly uniform midlateral bar, but adults may have either a midlateral bar, midlateral spot or both depending upon the species being examined (Kullander & Nijssen, 1989;López-Fernández et al, 2006).…”

Section: Methodsmentioning

confidence: 99%

“…Descriptions of the midlateral bar and the midlateral spot follow López-Fernández et al (2006). Ontogenetic change in pigmentation patterns is described when necessary as juvenile specimens from all species generally exhibit a dark, predominantly uniform midlateral bar, but adults may have either a midlateral bar, midlateral spot or both depending upon the species being examined (Kullander & Nijssen, 1989;López-Fernández et al, 2006). Type material included all measured (and some non-measured) specimens and encompassed the geographic distribution and range of ontogenetic and morphological variation for this species.…”

Section: Methodsmentioning

confidence: 99%

“…Guianacara currently consists of four species from Surinam and French Guiana (Kullander & Nijssen, 1989;Kullander, 2003): Guianacara geayi (Pellegrin, 1902), G. oelemariensis, G. sphenozona and G. owroewefi Kullander & Nijssen, 1989, and two species from the Venezuelan portion of the Guiana Shield: G. stergiosi and G. cuyunii López-Fernández, Taphorn & Kullander, 2006. Guianacara specimens from the Essequibo and Potaro River basins and from rio Branco tributaries in the Rupununi region in Guyana (former British Guiana) have historically been referred to as Aequidens (= Guianacara) geayi (Pellegrin, 1902;Lowe-McConnell, 1969) and in more recent museum records as Guianacara sphenozona or G. owroewefi (e.g., ROM, ANSP, AUM, pers.…”

Section: Introductionmentioning

confidence: 99%

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Guianacara dacrya, a new species from the rio Branco and Essequibo River drainages of the Guiana Shield (Perciformes: Cichlidae)

Arbour

López‐Fernández

2011

Neotrop. ichthyol.

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A new species of Guianacara is described from tributaries of the Essequibo River and the rio Branco in Guyana and northern Brazil. Guianacara dacrya, new species, can be diagnosed from all congeners by the possession of a unique infraorbital stripe and by the shape of the lateral margin of the lower pharyngeal jaw tooth plate. Guianacara dacrya can be further distinguished from G. geayi, G. owroewefi, G. sphenozona and G. stergiosi by the possession of a thin midlateral bar, from G. cuyunii by the possession of dusky branchiostegal membranes and from G. oelemariensis by the possession of two supraneurals. This species differs from most congeners by the presence of white spots on the spiny portion of the dorsal fin, the placement of the midlateral spot, the presence of filaments on the dorsal, anal and in rare cases the caudal-fin and from at least the Venezuelan species by several morphometric variables. Guianacara dacrya is known from the Essequibo, Takutu and Ireng River basins of Guyana and possibly from the rio Uraricoera in the rio Branco basin in Brazil. A key to the species is provided.Describimos una especie nueva de Guianacara de las cuencas del río Essequibo y el río Branco en Guyana y el norte de Brasil. Guianacara dacrya, especie nueva, puede distinguirse de todos sus congéneres por la presencia de una barra infraorbital modificada y por la forma única del margen lateral de la placa dentada de la mandíbula faríngea inferior. Adicionalmente, Guianacara dacrya se distingue de G. stergiosi, G. owroewefi, G. sphenozona y G. geayi por poseer una barra medio-lateral fina, de G. cuyunii por poseer membranas branquistegales grises y de G. oelemariensis por poseer dos supraneurales. La especie nueva se distingue de la mayoría de sus congéneres por la presencia de manchas blancas en la porción espinosa de la aleta dorsal, la posición de la mancha medio-lateral, la presencia de filamentos en la aleta dorsal, anal y en algunos casos en la caudal, y de al menos las especies venezolanas por varias características morfométricas. Guianacara dacrya se conoce de las cuencas del ríos Essequibo, Takutu e Ireng en Guyana y posiblemente del río Uraricoera en la cuenca del río Branco en Brasil. Se presenta una clave de especies.

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Two New Species of Guianacara from the Guiana Shield of Eastern Venezuela (Perciformes: Cichlidae)

Cited by 10 publications

References 6 publications

Phylogeny, taxonomy, and evolution of Neotropical cichlids (Teleostei: Cichlidae: Cichlinae)

Phylogeny, taxonomy, and evolution of Neotropical cichlids (Teleostei: Cichlidae: Cichlinae)

Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species

Guianacara dacrya, a new species from the rio Branco and Essequibo River drainages of the Guiana Shield (Perciformes: Cichlidae)

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