Abstract:A new species of Ancistrus is described from minor tributaries of the río Madre de Dios basin (Cusco - Madre de Dios - Puno), in Peru. The new species shares with A. greeni an uncommon unicusp dentition; but it is distinguished from A. greeni by a larger orbital diameter, deeper caudal peduncle, and larger adipose-fin spine. The redescription of A. greeni is provided, and its recognition along with the discovery of this new species increases to five the officially number of Ancistrus species from the río Madre… Show more
“…Most species of Ancistrus have mean orbital diameter (OD) >15% HL (i.e., de Souza et al, 2019; Taphorn et al, 2013), like A. yanesha (OD mean = 21.1% HL; Table 1). On the other hand, some Andean species have what we can consider as very small eyes, like A. greeni (Isbrücker, 2001) (OD mean = 11%; Bifi & Ortega, 2020) and A. occloi (OD =10.9% HL, CAS‐ICH 071818). Based on these features, we can distinguish A. yanesha from A. jelskii based on both coloration and morphological features.…”
Section: Discussionmentioning
confidence: 99%
“…Currently, only five other species reach similar sizes: A. maximus de Oliveira et al, 2015 is the largest species ever described, reaching more than 200 mm SL. The four other species are A. centrolepis Regan, 1913 and A. chagresi Eigenmann & Eigenmann, 1889 reaching 187.2 and 170.7 mm SL, respectively (Taphorn et al, 2013), A. alga (Cope, 1872), with 161 mm SL (Provenzano & Barriga, 2018), and two specimens of A. maldonadoi Bifi & Ortega, 2020, with 150 and 154 mm SL, deposited in the Auburn University Museum Fish Collection (AUM 51185).…”
Section: Discussionmentioning
confidence: 99%
“…All but A . maldonadoi Bifi & Ortega, 2020 and A . tamboensis Fowler, 1945a were described more than a century ago in a form that was brief and largely uninformative, complicating the recognition and delimitation of both valid and undescribed Ancistrus species in Peru.…”
Section: Introductionmentioning
confidence: 99%
“…The first of these characters is universal; however, four Ancistrus species have eight or nine branched dorsal-fin rays: A. dolichopterus Kner, 1854, A. fulvus (Holly, 1929), A. latifrons (Günther, 1869), and A. maximus de Currently, there are 12 valid Ancistrus species described from Peru, and four synonyms. All but A. maldonadoi Bifi &Ortega, 2020 andA. tamboensis Fowler, 1945a were described more than a century ago in a form that was brief and largely uninformative, complicating the recognition and delimitation of both valid and undescribed Ancistrus species in Peru.…”
With 76 currently valid species, the bushynose catfish genus Ancistrus is the fourth most species‐rich catfish genus, yet Ancistrus diversity remains underestimated, with many species still undescribed. This is especially true of the Peruvian Andean headwaters of the Amazon, which are rich in unnamed Ancistrus species but have received little recent taxonomic attention. We describe a distinctively striped new Ancistrus species from tributaries of the Palcazú River, in the Pachitea‐Ucayali‐Amazonas drainage basin. The new species differs from all congeners by having black, vermiculated lines covering the head and two to four distinct black, parallel, lateral body stripes from head to caudal fin (vs. body uniformly colored or with dark or light spots or blotches over head and body, or black vermiculate lines on flanks). The new species is the fifth valid species of Ancistrus described from the rich Ucayali River ichthyofauna. It has previously been recognized in the aquarium fish trade as L267.
“…Most species of Ancistrus have mean orbital diameter (OD) >15% HL (i.e., de Souza et al, 2019; Taphorn et al, 2013), like A. yanesha (OD mean = 21.1% HL; Table 1). On the other hand, some Andean species have what we can consider as very small eyes, like A. greeni (Isbrücker, 2001) (OD mean = 11%; Bifi & Ortega, 2020) and A. occloi (OD =10.9% HL, CAS‐ICH 071818). Based on these features, we can distinguish A. yanesha from A. jelskii based on both coloration and morphological features.…”
Section: Discussionmentioning
confidence: 99%
“…Currently, only five other species reach similar sizes: A. maximus de Oliveira et al, 2015 is the largest species ever described, reaching more than 200 mm SL. The four other species are A. centrolepis Regan, 1913 and A. chagresi Eigenmann & Eigenmann, 1889 reaching 187.2 and 170.7 mm SL, respectively (Taphorn et al, 2013), A. alga (Cope, 1872), with 161 mm SL (Provenzano & Barriga, 2018), and two specimens of A. maldonadoi Bifi & Ortega, 2020, with 150 and 154 mm SL, deposited in the Auburn University Museum Fish Collection (AUM 51185).…”
Section: Discussionmentioning
confidence: 99%
“…All but A . maldonadoi Bifi & Ortega, 2020 and A . tamboensis Fowler, 1945a were described more than a century ago in a form that was brief and largely uninformative, complicating the recognition and delimitation of both valid and undescribed Ancistrus species in Peru.…”
Section: Introductionmentioning
confidence: 99%
“…The first of these characters is universal; however, four Ancistrus species have eight or nine branched dorsal-fin rays: A. dolichopterus Kner, 1854, A. fulvus (Holly, 1929), A. latifrons (Günther, 1869), and A. maximus de Currently, there are 12 valid Ancistrus species described from Peru, and four synonyms. All but A. maldonadoi Bifi &Ortega, 2020 andA. tamboensis Fowler, 1945a were described more than a century ago in a form that was brief and largely uninformative, complicating the recognition and delimitation of both valid and undescribed Ancistrus species in Peru.…”
With 76 currently valid species, the bushynose catfish genus Ancistrus is the fourth most species‐rich catfish genus, yet Ancistrus diversity remains underestimated, with many species still undescribed. This is especially true of the Peruvian Andean headwaters of the Amazon, which are rich in unnamed Ancistrus species but have received little recent taxonomic attention. We describe a distinctively striped new Ancistrus species from tributaries of the Palcazú River, in the Pachitea‐Ucayali‐Amazonas drainage basin. The new species differs from all congeners by having black, vermiculated lines covering the head and two to four distinct black, parallel, lateral body stripes from head to caudal fin (vs. body uniformly colored or with dark or light spots or blotches over head and body, or black vermiculate lines on flanks). The new species is the fifth valid species of Ancistrus described from the rich Ucayali River ichthyofauna. It has previously been recognized in the aquarium fish trade as L267.
“…El género Ancistrus. Este género se distribuye desde Panamá hasta los ríos afluentes a la Río de la Plata (López et al, 1987(López et al, , 2003Miquelarena et al, 1994;Provenzano et al, 2018) y es uno de los géneros con más especies de los loricáridos (Bifi & Ortega, 2020). Hasta el momento se conocen cuatro especies en Argentina, en la cuenca del Paraná-Plata: Ancistrus cirrhosus, Ancistrus taúnayi, Ancistrus piriformis y A. mullerae (Koerber & Weber, 2014;Mirande & Koerber, 2015;Casciotta et al, 2016).…”
Section: Asignación De Typupiscis Lujanensis (Ameghino 1874) a Ancist...unclassified
Las tensiones y rivalidades entre Karl Hermann Konrad Burmeister (1807-1892) y Giovanni Battista Fiorino Giuseppe Ameghino se inician entre 1870 y 1874 por diferencias en determinaciones taxonómicas de mamíferos fósiles y fundamentalmente, por la controversia sobre la existencia del "hombre fósil" pampeano en el valle del Luján. Estas diferencias tuvieron un origen natural dada la fuerte disimetría social y humana entre ambos personajes (Fernández, 2001: 23). Burmeister, autoridad científica internacional y director del Museo de Buenos Aires, veía con creciente desagrado y luego franco rechazo, como un simple maestro de provincia 46 años menor se permitía impertinentes observaciones sobre su obra, creaba nuevas especies y recreaba en Luján, con insistencia, las mismas polémicas sobre el "hombre antediluviano" que habían tenido lugar 20 años antes en Francia (Cohen & Hublin, 1989;Richard, 2008). Más tarde, en las décadas de 1880 y 1890, con un Ameghino aceptado entre pares y abocado a la descripción de las faunas terciarias de Paraná y de la Patagonia, las críticas con réplicas y contrarréplicas sobre la calidad de publicaciones y validez de nuevas especies van subiendo de tono
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