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Mutsumi Nishida – 1st expert on this subject based on the ideXlab platform

  • Revision of the systematics of the cardinalfishes (Percomorpha: Apogonidae) based on molecular analyses and comparative reevaluation of morphological characters.
    Zootaxa, 2014
    Co-Authors: Kohji Mabuchi, Thomas H Fraser, Hayeun Song, Yoichiro Azuma, Mutsumi Nishida


    Molecular analyses were conducted based on 120 of the estimated 358 species of the family Apogonidae with 33 of 40 genera and subgenera, using three gobioids and one kurtid as collective outgroups. Species of Amioides , Apogon , Apogonichthyoides , Apogonichthys , Archamia , AstrApogon , Brephamia , Cercamia , Cheilodipterus , Fibramia n. gen., Foa , Fowleria , Glossamia , GymnApogon , Jaydia , Lachneratus , Nectamia , Ostorhinchus , Paroncheilus , Phaeoptyx , PristiApogon , Pristicon , Pseudamia , PterApogon , Rhabdamia , Siphamia , Sphaeramia , Taeniamia , Verulux , Vincentia , Yarica , ZApogon and Zoramia were present in the molecular analyses; species of Bentuviaichthys , HolApogon , Lepidamia , Neamia , Paxton , Pseudamiops and Quinca were absent from the analyses. Maximum-likelihood (ML), Bayesian (BA), and Maximum parsimony (MP) analyses based on two mitochondrial (12S rRNA-tRNA Val -16S rRNA, ca. 1500 bp; COI, ca. 1500 bp) and two nuclear DNA (RAG1, ca. 1300 bp; ENC1, ca. 800 bp) fragments reproduced two basal clades within the monophyletic family: one including a single species, Amioides polyacanthus , and the other comprising species of Pseudamia . All the other Apogonid species formed a large well-established monophyletic group, in which almost identical 12 major clades were reproduced, with phylogenetic positions of four species ( Glossamia aprion , Ostorhinchus margaritophorus , PterApogon kauderni , and Vincentia novaehollandiae ) left unsettled. Apogon sensu lato and recent Ostorhinchus (excepting O. margaritophorus ) were divided into six and three major clades, respectively. Each of the recognized clades in the family was then evaluated for morphological characters to identify synapomorphies. Based on the results of the molecular analyses and the reevaluation of morphological characters, four subfamilies were proposed within the family: Apogoninae (including most of the species in the family), Amioidinae new subfamily (including Amioides , and based on morphology, HolApogon ), Paxtoninae new subfamily (including Paxton , based only on morphology) and Pseudamiinae (including Pseudamia ). Within the largest subfamily Apogoninae, twelve new tribes were proposed based on the 12 molecular clades and associated morphology: Apogonichthyini, Apogonini (mainly including species of Apogon sensu stricto ), Archamiini, Cheilodipterini, GymnApogonini, Ostorhinchini (including striped species of recent Ostorhinchus ), PristiApogonini, Rhabdamiini, Sphaeramiini (mainly including barred species of traditional Ostorhinchus , such as Apogonichthyoides , Jaydia and Nectamia ), Siphamiini, Veruluxini, and Zoramiini. Two additional tribes are proposed based only on morphology: Glossamiini and Lepidamiini. For each of the 14 tribes, morphological characters were described. One new genus, Fibramia , type species Apogon thermalis , recently in Ostorhinchus , was described supported by morphology and molecular trees. A key to all genera is provided and all valid and uncertain status species are allocated to tribes and genera.

  • molecular phylogeny and stripe pattern evolution in the cardinalfish genus Apogon
    Molecular Phylogenetics and Evolution, 2006
    Co-Authors: Kohji Mabuchi, Noboru Okuda, Mutsumi Nishida


    CardinalWshes of the genus Apogon (Apogonidae) are one of the most speciose (>200 species) and numerically dominant Wshes in coral reefs. Although the genus is divided into 10 subgenera, more than 70% of the species are included in the subgenus Ostorhinchus, most having either horizontal or vertical lines on the body. The phylogenetic relationship among 32 species of subgenus Ostorhinchus and 11 species of four other subgenera of Apogon, based on mitochondrially encoded 12S and 16S ribosomal genes and intervening tRNA Val gene, were investigated, using two species of the Apogonid genus Fowleria as outgroups. The analyses demonstrated that Ostorhinchus (the most speciose subgenus) was polyphyletic, comprising at least three lineages, Ostorhinchus I, II, and III. Ostorhinchus I included two species, A. (O.) amboinensis and A. (O.) sangiensis, being a sister group to subgenus Zoramia. Ostorhinchus II and III included species with horizontal and vertical lines on the body, respectively. The respective monophylies of the latter two groups, together with a molecular clock calibration, indicated that in the evolutionary history of the genus, basic stripe patterns evolved Wrst (more than 20 million years BP), with subsequent pattern diversiWcation and modiWcation.

  • genetic differentiation between two color morphs of Apogon taeniophorus from southern japan
    Ichthyological Research, 2004
    Co-Authors: Kohji Mabuchi, Noboru Okuda, Mutsumi Nishida


    The anterior half of the mitochondrial 16S rRNA gene (ca. 610 bp) was compared for two color morphs (spotted and lined types) of a dark-striped cardinalfish, previously identified as Apogon taeniophorus. Phylogenetic analyses using maximum-parsimony (MP) and neighbor-joining (NJ) methods, with haplotypes of A. cookii as an outgroup, showed that the haplotypes of each color-morph were reciprocally monophyletic with 100% bootstrap values. In addition, the degree of sequence difference between the two morphs was comparable to that existing between the other clearly distinct congeneric species. These results, together with the differences in coloration and overlapped geographical ranges, indicated that the two color morphs of A. taeniophorus represent two distinct species.

Omar Dominguezdominguez – 2nd expert on this subject based on the ideXlab platform

  • diversification of the genus Apogon lacepede 1801 Apogonidae perciformes in the tropical eastern pacific
    Molecular Phylogenetics and Evolution, 2019
    Co-Authors: Victor Julio Pineros, Carole C Baldwin, Omar Dominguezdominguez, Rosa Gabriela Beltranlopez, Enrique Barraza, Eduardo Espinoza, Juan Esteban Martinez


    Abstract We examined the role of geographic barriers and historical processes on the diversification of Apogon species within the tropical eastern Pacific (TEP). Mitochondrial and nuclear DNA sequences were used in Bayesian and Maximum likelihood analyses to generate a phylogenetic hypothesis for Apogon species. Bayesian inferences were used to date the cladogenetic events. Analyses with BioGeoBEARS were conducted to reconstruct the biogeographic history and ancestral ranges. The phylogenetic results show a monophyletic clade of TEP Apogon species with A. imberbis from the eastern Atlantic as sister species. The two lineages diverged during the Miocene. Within the TEP clade, two subclades diverged at around 11.1 million years ago (Mya): one clusters the coastal continental species (A. pacificus, A. retrosella and A. dovii), and the second clusters the oceanic island species (A. atradorsatus, A. atricaudus and A. guadalupensis). The estimated diversification times of these subclades were 9.8 and 7.1 Mya, respectively. Within each subclade, species divergences occurred during the Pliocene-Pleistocene epochs. The divergent event between the Atlantic A. imberbis and Apogon TEP clade corresponds to the first closure event of the Central American Seaway. The biogeographic history of Apogon within the TEP appears to be the result of vicariant, dispersal and founder events that occurred during the last 11 million years. The vicariant and dispersal events occurred along the mainland and were associated with the origin of the Central American Gap. The founder events could have allowed the invasion of Apogon to TEP island areas and could have been driven by ancient warming oceanic waters, changes in circulation of marine currents, and the presence of seamounts in ancient marine ridges that allowed the settlement of marine biota. These factors may have allowed Apogon lineages to cross the TEP biogeographic barriers at different times, with subsequent genetic isolation.

John E Randall – 3rd expert on this subject based on the ideXlab platform

  • two new cardinalfish species of the genus Apogon from easter island
    Proceedings of the California Academy of Sciences 4th series., 2004
    Co-Authors: David W Greenfield, John E Randall


    Three species of Apogon have been reported from Easter Island, two of which are here described as new: Apogon kauteamea (formerly A. coccineus), small, translucent red, with VI first-dorsal spines, a free edge of skin near the anterior nasal opening, and two rows of scales between the lateral line and the base of the third dorsal spine; and Apogon rubrifuscus (formerly talboti), distinct in having two predorsal bones and 12 pectoral-fin rays. It is similar to A. deetsie and A. caudicinctus, but has a much larger membranous preopercular flap, lacks any dark bars on the body, and attains larger size (101.5 mm SL).

  • two new species of deeper dwelling Apogon perciformes Apogonidae from micronesia and south pacific ocean
    Zootaxa, 2003
    Co-Authors: Thomas H Fraser, John E Randall


    Apogon brevispinis is described from two specimens, the larger of which is missing the caudal peduncle, collected at the Austral Islands. This species has a tiny first dorsal-fin spine (5-8% of the third dorsal-fin spine length), 18-19 well-developed gill rakers on first arch, 5 predorsal scales, elongated last soft dorsal and anal fin-rays, 14 circumpeduncular scales, 5 broad tan-brown stripes alternating with 5 narrow whitish stripes, and an irregular dark caudal peduncle mark. Apogon regula is described from five specimens collected in Guam and the Carolina Islands. This species has a longer first dorsal-fin spine (10-15% of the third dorsal-fin spine length), 13-14 well-developed gill rakers on first arch, 4 predorsal scales, 12-13 circumpeduncular scales 5 broad golden-brown stripes alternating with 4 narrow whitish stripes, and dark brown broad stripes on the upper and lower caudal peduncle.

  • clarification of the cardinalfishes Apogonidae previously confused with Apogon moluccensis valenciennes with a description of a related new species
    , 2002
    Co-Authors: Thomas H Fraser, John E Randall, Gerald R Allen


    ABSTRAC1: –Apogon moluccensis Valenciennes, 1832, is redescribed and its range noted as Indonesia, Papua New Guinea, Philippines, and the Solomon Islands, Geographic variation of gill rakers and rudiments on the first gill arch is noted among three populations, Apogon chrysosoma Bleeker, 1852, A, monochrous Bleeker, 1856, and A. ventrifasciatus Allen, Kuiter & Randall, 1994, are regarded as junior synonyms. Lectotypes of A. chrysosoma and A. monochrous are designated and described. Apogon monospilus, previously misidentified as A. moluccensis, is described as a new species. It is distinguished from A. moluccensis by having 25-28 gill rakers plus rudiments and darkly pigmented roof of mouth including some of the gill arches versus 21-25 gill rakers with pale roof of mouth and gill arches. The new species was frequently collected in depths greater than 20 meters. New records from India and the Maldives are reported for Apogon oxina, a related species.