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18 results for “Polymixia”
Figure 2 in First record of Polymixia nobilis Lowe, 1836 (Polymixiidae) for Eastern Central Atlantic, São Tomé Island
Figure 2. – Polymixia nobilis Lowe, 1836 (MB06-005744) (SL = 291 mm) captured on 01 Oct. 1955 with bottom line off the north-eastern coast of S. Tomé Island, close to Gamboa Beach, by local fishermen. Photo by L.F. Lopes.
Figure 1 in First record of Polymixia nobilis Lowe, 1836 (Polymixiidae) for Eastern Central Atlantic, São Tomé Island
Figure 1. – Map of São Tomé Island (Gulf of Guinea, Atlantic Ocean) showing the capture site (*) of Polymixia nobilis at Gamboa Beach (0°22'47.17"N; 06°43'11.99"E).
FIG. 12 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 12. Bathymetric map of the Bermuda Platform, Challenger Bank, and adjacent submarine slopes, with collecting localities for three species of Polymixia. ''P. sp. nov.'' denotes Polymixia hollisterae, new species, caught ''outside Eastern Blue Cut'' off the NW edge of the Bermuda Platform. The more frequently caught Polymixia lowei has only been taken in two areas off the SE shore of Bermuda, and the single known specimen of Polymixia nobilis was taken on the slope of Challenger Bank, 24 km (14 nautical miles) southwest of the Bermuda Islands. Base map by L. Doughty (BAMZ).
FIG. 13 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 13. Results of the Principal Components Analysis of Procrustes coordinates for 34 landmarks from 27 adult specimens belonging to five species of Polymixia. (A) Wireframe representation of the 34 landmarks digitized for the analysis superimposed on an image of the holotype of Polymixia hollisterae, new species. (B) Graph of component scores for PC 1 and PC 2, showing evidence of the distinct body form of Polymixia hollisterae, new species. The four wireframe cartoons illustrate the variation along both principal axes in the analyzed species.
FIG. 11 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 11. Drawing of the first anal-fin radial of the second paratype of Polymixia hollisterae, new species, MCZ 174218, north-central Gulf of Mexico, from lCT scan data. Note the nearly straight main shaft and the nearly horizontal anterior process, like those of the Bermuda holotype and paratype (Fig. 10C, D). These diagnostic traits confirm morphologically its correct identification to species. Abbreviations: see caption for Figure 9.
FIG. 10 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 10. Drawings of first anal-fin proximal radials in selected species of Polymixia (compare with the radiographs in Fig. 9). (A) P. nobilis, ANSP 124292, 290 mm SL, Bermuda. (B) P. japonica, FMNH 63860-1, 153 mm SL, Sea of Japan. (C) P. hollisterae, new species, paratype, FMNH 145004, 185 mm SL, Bermuda. (D) P. hollisterae, new species, holotype, BAMZ 1997-159-006, 173 mm SL, Bermuda. (E) P. lowei, BAMZ 1989- 047-003, 210 mm SL. (F) P. lowei, BAMZ 1989-047-006, 226 mm SL. Compare with the radiographs in Figure 9. Abbreviations: see caption for Figure 9.
FIG. 8 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 8. Summary of the patterns of interdigitation of dorsal proximal radials between neural spines in selected species and specimens of Polymixia. The number of radials between adjacent neural spines is shown beginning with neural spines 4 and 5 and ending at or before neural spines 22 and 23. Data are taken from whole-fish radiographs except for one cleared and stained specimen of P. nobilis.
FIG. 14 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 14. Comparison of average proportions among adult specimens of five species of Polymixia, calculated using lengths derived from the morphometric landmark coordinates. Averages for each proportion and species are colored orange if they are the highest ratio among the five species and blue if they are the lowest in the comparison. Polymixia hollisterae, new species, has the greatest number of extreme values (12: 8 highest, 4 lowest) of the five species.
FIG. 7. X in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 7. X-radiographs of supraneurals and proximal dorsal radials in several species of Polymixia. (A–C, F) Polymixia nobilis. (A) FMNH 142335, 243 mm SL, Madeira. (B) FMNH 142336, 266 mm SL, Madeira. (C) FMNH 142337, 175 mm SL, Madeira. (F) ANSP 124292, 290 mm SL, Bermuda. (D) Polymixia hollisterae, new species, holotype, BAMZ 1997-159-006, 173 mm SL, Bermuda. (E) Polymixia hollisterae, new species, paratype, FMNH 145004, 185 mm SL, Bermuda. (G–I) Polymixia lowei. (G) BAMZ 1989-047-003, 210 mm SL, Bermuda. (H) BAMZ 1989-047-006, 226 mm SL, Bermuda. (I) USNM RAD 2126927. (J–L) Polymixia japonica, Sea of Japan. (J) FMNH 63860-1, 153 mm SL. (K) FMNH 63860-2, 144 mm SL. (L) FMNH 63860-3, 146 mm SL. Abbreviations: dr, dorsal-fin proximal radials (numbered); ds, dorsal-fin spines (numbered); dsr, dorsal-fin soft rays (numbered); ns, neural spines (numbered); sn, supraneurals (numbered).
FIG. 6 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 6. Oblique views of the head of the type specimens of Polymixia hollisterae, new species. (A) Holotype, BAMZ 1997-159-006, 173 mm SL. (B) Bermuda paratype, FMNH 145004, 185 mm SL. Scale bars ¼ 1 cm. Note the sinuous band of teeth on the dentary in both specimens, and the broad band of teeth on the premaxilla.
FIG. 5 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 5. Closeup views of Polymixia hollisterae, new species. (A) Caudal region and median fins of the holotype, BAMZ 1997-159-006, 173 mm SL. (B) Lateral view of the head of the holotype. (C) Ventral view of the head showing the hyoid barbels of the Bermuda paratype, FMNH 145004, 185 mm SL. The base of each barbel contains three small, modified branchiostegals (Ono, 1982). Scale bars ¼ 1 cm.
FIG. 2 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 2. The type specimens of Polymixia hollisterae, new species, from Bermuda. (A) Holotype, BAMZ 1997-159-006, 173 mm SL. (B) Paratype, FMNH 145004, 185 mm SL. Scale bars ¼ 1 cm.
FIG. 3 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 3. The second paratype of Polymixia hollisterae, new species, from the north-central Gulf of Mexico, MCZ 174218, 20 mm SL (formerly DeepEnd Consortium specimen DPND 1320). (A) The image taken aboard ship shortly after collection in 2015, photo by Danté Fenolio, DeepEnd, used with permission. (B) The existing specimen, lacking the posterior one-third of the body and tail owing to tissue sampling for DNA. Scale bars ¼ 5 mm (estimated from the specimen's original standard length).
FIG. 1 in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 1. Phylogeny of species and species groups in the genus Polymixia based on Bayesian results using nuclear and mitochondrial loci from Borden et al. (2019). The new Bermuda species is a member of the P. japonica species group, sister to P. japonica þ Polymixia cf. P. japonica. The triangle representing each species has its vertical edge proportional to the number of genetic samples studied and its left apex located at the earliest split among all of its samples (compare with Borden et al., 2019: fig. 4).
Data for morphometric analysis and DNA barcode sequence for the new fish species Polymixia hollisterae
<p>Two datasets are provided to support the journal article (https://doi.org/10.1643/i2020112) by T. C. Grande and M. V. H. Wilson naming the new Bermuda fish species <em>Polymixia hollisterae</em>. The first dataset is for 2-D multivariate morphometric comparisons of selected specimens and species of the fish genus <em>Polymixia</em>. The file is in TPS format, as a plain text file, for use in the application MorphoJ. The data are for 27 specimens with pixel coordinates for 34 landmarks digitized in ImageJ and used to generate Fig. 13 in the referenced publication. The second dataset, published here courtesy of Dr. R. Eytan, is a mitochondrial DNA barcode sequence in fasta format for the second paratype specimen, a small juvenile of the new species. The specimen is only the third one known of the new species and the only one not from Bermuda. It was collected in the north-central Gulf of Mexico and is now deposited in the Harvard University MCZ fish collection as catalog number MCZ 174218. The fasta file can be used as input to the barcode identification function at boldsystems.org, although its original identification in BOLD was incorrect.</p>
Data for morphometric analysis and DNA barcode sequence for the new fish species Polymixia hollisterae
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FIG. 9. X in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 9. X-radiographs of anal-fin radials and associated vertebrae in selected species of Polymixia, all from Bermuda except for (B) which is from the Sea of Japan. (A) P. nobilis, ANSP 124292, 290 mm SL. (B) P. japonica, FMNH 63860-1, 153 mm SL. (C) Polymixia hollisterae, new species, paratype, FMNH 145004, 185 mm SL. (D) Polymixia hollisterae, new species, holotype, BAMZ 1997-159-006, 173 mm SL. (E) Polymixia lowei, BAMZ 1989- 047-003, 210 mm SL. (F) Polymixia lowei, BAMZ 1989-047-006, 226 mm SL. Abbreviations: ap, anterior process of first anal-fin proximal radial; ar, anal-fin proximal radial (numbered); as, anal-fin spines (numbered); asr, anal-fin soft rays (numbered); cc, conical cavity of first anal radial; ehs1, expanded first haemal spine; hi, probable healed injury of haemal spines; ms, main shaft of first anal-fin radial.
FIG. 4. X in A New Cryptic Species of Polymixia (Teleostei, Acanthomorpha, Polymixiiformes, Polymixiidae) Revealed by Molecules and Morphology
FIG. 4. X-radiographs of the type specimens of Polymixia hollisterae, new species, from Bermuda. (A) Holotype, BAMZ 1997-159-006, 173 mm SL. (B) Paratype, FMNH 145004, 185 mm SL. Scale bars ¼ 1 cm.
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