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9 results for “Holocentridae”
Figure 4 in A new order of fishes as hosts of blood flukes (Aporocotylidae); description of a new genus and three new species infecting squirrelfishes (Holocentriformes, Holocentridae) on the Great Barrier Reef
Figure 4. Relationships between species of Holocentricola and other members of the Aporocotylidae based on phylogenetic analysis of the 28S dataset. Bayesian inference posterior probabilities values are shown above the nodes and maximum likelihood bootstrap support shown below; values of <85 and <0.85 not shown. The scale-bar indicates expected number of substitutions per site.
Figure 3 in A new order of fishes as hosts of blood flukes (Aporocotylidae); description of a new genus and three new species infecting squirrelfishes (Holocentriformes, Holocentridae) on the Great Barrier Reef
Figure 3. Species of Holocentricola from Great Barrier Reef Holocentridae, terminal genitalia, dorsal views; spines illustrated are ventral. (A) Holocentricola rufus n. sp. ex Sargocentron rubrum from off Heron Island (paratype, QM G239440); (B) Holocentricola exilis n. sp. ex Neoniphon sammara from off Lizard Island (paratype, QM G239119); (C) Holocentricola coronatus n. sp. ex Sargocentron diadema from off Lizard Island (paratype, QM G239126). Abbreviations: CS, cirrus-sac; ER, egg reservoir; FGP, female genital pore; MGP, male genital pore; Od, oviduct; Oö, oötype; Ov, ovary; PP, pars prostatica; SV, seminal vesicle; Ut, uterus; VD, vas deferens; VitD, vitelline duct. Scale-bars: A–C, 100 µm.
Figure 2 in A new order of fishes as hosts of blood flukes (Aporocotylidae); description of a new genus and three new species infecting squirrelfishes (Holocentriformes, Holocentridae) on the Great Barrier Reef
Figure 2. Species of Holocentricola from Great Barrier Reef Holocentridae, whole worms, ventral views. (A) Holocentricola rufus n. sp. ex Sargocentron rubrum from off Heron Island (holotype, QM G239429); (B) Holocentricola exilis n. sp. ex Neoniphon sammara from off Lizard Island (paratype, QM G239111); (C) Holocentricola coronatus n. sp. ex Sargocentron diadema from off Lizard Island (holotype, QM G239125). Scale-bars: A–C, 200 µm.
The visual ecology of Holocentridae, a nocturnal coral reef fish family with a deep-sea-like multibank retina
<p>The visual systems of teleost fishes usually match their habitats and lifestyles. Since coral reefs are bright and colourful environments, the visual systems of their diurnal inhabitants have been more extensively studied than those of nocturnal species. In order to fill this knowledge gap, we conducted a detailed investigation of the visual system of the nocturnal reef fish family Holocentridae. Results showed that the visual system of holocentrids is well adapted to their nocturnal lifestyle with a rod-dominated retina. Surprisingly, rods in all species were arranged into 6-17 well-defined banks, a feature most commonly found in deep-sea fishes, that may increase the light sensitivity of the eye and/or allow colour discrimination in dim-light. Holocentrids also have the potential for dichromatic colour vision during the day with the presence of at least two spectrally different cone types: single cones expressing the blue-sensitive <i>SWS2A</i> gene, and double cones expressing one or two green-sensitive <i>RH2</i> genes. Some differences were observed between the two subfamilies, with Holocentrinae (squirrelfish) having a slightly more developed photopic visual system than Myripristinae (soldierfish). Moreover, retinal topography of both ganglion cells and cone photoreceptors showed specific patterns for each cell type, likely highlighting different visual demands at different times of the day, such as feeding. Overall, their well-developed scotopic visual systems and the ease of catching and maintaining holocentrids in aquaria, make them ideal models to investigate teleost dim-light vision and more particularly shed light on the function of the multibank retina and its potential for dim-light colour vision.</p>
The visual ecology of Holocentridae, a nocturnal coral reef fish family with a deep-sea-like multibank retina
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Data from: Molecular phylogenetics of squirrelfishes and soldierfishes (Teleostei:Beryciformes: Holocentridae): reconciling more than 100 years of taxonomic confusion
Squirrelfishes and soldierfishes (Holocentridae) are among the most conspicuous species in the nocturnal reef fish community. However, there is no clear consensus regarding their evolutionary relationships, which is reflected in a complicated taxonomic history. We collected DNA sequence data from multiple single copy nuclear genes and one mitochondrial gene sampled from over fifty percent of the recognized holocentrid species and infer the first species-level phylogeny of the Holocentridae. Our results strongly support the monophyly of the clades Myripristinae (soldierfishes) and Holocentrinae (squirrelfishes). The molecular phylogenies differ with regard to previous hypotheses of relationships within the Myriprisitinae, resolving a clade of cryptic reef associated and deep water non-reef dwelling lineages (Corniger+Plectrypops+Ostichthys) that is the sister lineage to a monophyletic Myripristis. Within Holocentrinae, Neoniphon and Sargocentron are strongly supported as paraphyletic, while Holocentrus is nested within Sargocentron. Using Bayesian ancestral state reconstruction methods, we demonstrate the taxonomically diagnostic characters for Neoniphon and Sargocentron likely represent character states with a complex evolutionary history that is not reflective of shared common ancestry. We propose a new classification for Holocentrinae, recognizing four lineages that are treated as genera: Sargocentron Fowler, 1904, Holocentrus Scopoli, 1777, Flameo Jordan and Evermann, 1898, and Neoniphon Castelnau, 1875.
Figure 1 in A new order of fishes as hosts of blood flukes (Aporocotylidae); description of a new genus and three new species infecting squirrelfishes (Holocentriformes, Holocentridae) on the Great Barrier Reef
Figure 1. Phylogram from the unrooted Neighbour-joining analysis of the cox1 mtDNA dataset. Bootstrap support values are shown at the nodes, with values of <85 not shown. The scale-bar indicates the number of base differences.
Data from: Molecular phylogenetics of squirrelfishes and soldierfishes (Teleostei:Beryciformes: Holocentridae): reconciling more than 100 years of taxonomic confusion
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Data from: The impact of shifts in marine biodiversity hotspots on patterns of range evolution: evidence from the Holocentridae (squirrelfishes and soldierfishes)
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