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A new species of Hoplomyzon (Siluriformes: Aspredinidae) from Maracaibo Basin, Venezuela: osteological description using high-resolution computed microtomography of a miniature species Neotropical Ichthyology
Carvalho,Tiago P.; Reis,Roberto E.; Friel,John P..
ABSTRACT A new miniature species of banjo catfish of the genus Hoplomyzon is described from the Lake Maracaibo Basin in Venezuela. The new species is distinguished from all its congeners by the straight anterior margin of the mesethmoid (vs. a medial notch); a smooth and straight ventral surface of the premaxilla (vs. presence of bony knobs on the ventral surface of premaxilla); absence of teeth on dentary (vs. teeth present on dentary); configuration of ventral vertebral processes anterior to anal fin, which are composed of single processes anterior to anal-fin pterygiophore (vs. paired process); presence of several filamentous barbel-like structures on the ventral surface of head of adults (vs. small papillous structures in the ventral surface of head of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endemism; Ernstichthys intonsus; Miniaturization; Synapomorphy; Taxonomy.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100216
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Ontogenetic development of Heterocharax macrolepisEigenmann (Ostariophysi: Characiformes: Characidae) with comments on the form of the yolk sac in the Heterocharacinae Neotropical Ichthyology
Mattox,George M. T.; Hoffmann,Martin; Hoffmann,Peter.
Fishes in early developmental stages frequently have morphological features that differ from those of adult stages, and many characters found later in ontogeny are not available in initial stages. Hence, morphological descriptions of early stages are useful to provide information for the identification of eggs and larvae, a knowledge still restricted among Neotropical fishes. We studied the development of Heterocharax macrolepis, a heterocharacine whose adult specimens from the aquarium trade were kept and spawned at around 23-24ºC. A developmental series of 51 specimens was preserved, ranging from 3.2 mm notochord length to 18.6 mm standard length, covering approximately the first 73 days post-hatching. We described the development of main morphological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Early life history; Morphology; Pseudotympanum; Synapomorphy; Systematics.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000200353
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Synaphridae of Madagascar (Araneae: Araneoidea): A New Family Record for the Afrotropical Region Naturalis
Miller, J.A..
The spider family Synaphridae is reported for the first time from Madagascar. Three new species are described. Africepheia gen. nov. is established for A. madagascariensis sp. nov.; two species of Synaphris Simon, 1894 are described: S. schlingeri sp. nov. and S. toliara sp. nov. Diagnostic characteristics for the family and putative synapomorphies are discussed, elucidated by scanning electron microscope images representing both Malagasy genera. This research highlights the connection between large scale collecting efforts in biodiversity hotspots like Madagascar and advances in systematics.
Tipo: Article / Letter to the editor Palavras-chave: Taxonomy; Synapomorphy; Scanning electron microscopy; Africepheia; Cepheia; Synaphris; 42.74.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/306631
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