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717 results for “Asellota”
FIGURE 10 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 10. SEM photographs. Holodentata triangulata sp. nov., paratype ♀, ZMH–41973. A, dorsal view and detail of the uropod. Scale bar = 100 µm. B, frontal margin of head in dorsal view; C, antenna. Scale bars = 20 µm. H. caeca sp. nov., paratype ♀, ZMH–41971. D, dorsal view and details of the lateral margins of the pereonites. Scale bar = 100 µm.
FIGURE 9 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 9. Holodentata triangulata sp. nov., paratype ♀, ZMH–41973, A, pereopod 5; B, pereopod 6; C, pereopod 7. Scale bar = 0.1 mm. D, operculum; E, pleopod 3; F, pleopod 4; G, pleopod 5. Scale bars = 0.2 mm. H, uropod. Scale bar = 0.05 mm. Paratype ♂, ZMH–41973. I, pleopod 1; J, pleopod 2. Scale bars = 0.2 mm.
FIGURE 8 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 8. Holodentata triangulata sp. nov., paratype ♀, ZMH–41973, A, pereopod 1; B, dactylus of pereopod 1; C, pereopod 2; D, pereopod 3; E, pereopod 4. Scale bars = 0.1 mm.
FIGURE 6 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 6. Holodentata triangulata sp. nov., holotype ♀, ZMH–41972, A, dorsal view; B, lateral view. Scale bar = 1 mm. C, head in ventral view. Scale bar = 0.5 mm. D, Pleotelson in ventral view. Scale bar = 0.5 mm.
FIGURE 5 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 5. Holodentata caeca sp. nov., paratype ♀, ZMH–41971, A, operculum; B, pleopod 3; C, pleopod 4; D, pleopod 5. Scale bars = 0.2 mm. E, uropod. Scale bar = 0.05 mm. Paratype ♂, ZMH–41971. F, pleopod 1; G, pleopod 2. Scale bars = 0.2 mm.
FIGURE 4 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 4. Holodentata caeca sp. nov., paratype ♀, ZMH–41971, A, pereopod 4; B, pereopod 5; C, pereopod 6; D, pereopod 7. Scale bars = 0.1 mm.
FIGURE 2 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 2. Holodentata caeca sp. nov., paratype ♀, ZMH–41971, A, antenna. Scale bar = 0.1 mm. B, antennula; C, right mandible; D, left mandible; E, maxillula; F, maxilla. Scale bars = 0.05 mm.
FIGURE 3 in Holodentata gen. nov. (Isopoda: Asellota: Paramunnidae) with a description of two new species: H. caeca and H. triangulata from the Southern Ocean*
FIGURE 3. Holodentata caeca sp. nov., paratype ♀, ZMH–41971, A, maxilliped; B, pereopod 1; C, pereopod 2; D, pereopod 3. Scale bars = 0.1 mm.
Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota)
<p>In the deep sea, the phylogeny and biogeography of only a few taxa have been well studied. Although more than 200 species in 32 genera have been described for the asellote isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 from all ocean basins, their phylogenetic relationships are not completely understood. There is little doubt about the close relationship of these families, but the taxonomic position of a number of genera is so far unknown. Based on a combined morphological phylogeny using the Hennigian method with a dataset of 107 described species and a molecular phylogeny based on three markers (COI, 16S, and 18S) with 75 species (most new to science), we could separate Desmosomatidae and Nannoniscidae as separate families. However, we could not support the concept of the subfamilies Eugerdellatinae Hessler, 1970 and Desmosomatinae Hessler, 1970. Most genera of both families were well supported, but several genera appear as para- or even polyphyletic. Within both families, convergent evolution and analogies caused difficulty in defining apomorphies for phylogenetic reconstructions and this is reflected in the results of the concatenated molecular tree. There is no biogeographic pattern in the distribution as the genera occur over the entire Atlantic and Pacific Ocean, showing no specific phylogeographical pattern. Poor resolution at deep desmosomatid nodes may reflect the long evolutionary history of the family and rapid evolutionary radiations.</p>
FIGURE 6 in Description of two new janirid isopods (Isopoda, Asellota, Janiridae) from Korean waters
FIGURE 6. Janiralata truncata sp. nov., holotype, male (A–J) and paratype female, NIBRIV0000895340 (K). A–D, Pereopods Ⅰ–III and VII, respectively; E–I, Pleopods Ⅰ–Ⅴ, respectively; J, Uropod; K, Pleopod II. Scale bar: A–K = 0.2 mm.
FIGURE 5 in Description of two new janirid isopods (Isopoda, Asellota, Janiridae) from Korean waters
FIGURE 5. Janiralata truncata sp. nov., holotype male, NIBRIV0000897185. A, Habitus, dorsal view; B, Pleotelson; C, Antennula; D, Antenna; E, Right mandible; F, Left mandible; G, Maxillula; H, Maxilla; I, Maxilliped. Scale bars: A = 1 mm, B–I = 0.2 mm.
FIGURE 4 in Description of two new janirid isopods (Isopoda, Asellota, Janiridae) from Korean waters
FIGURE 4. Caecijaera ciliata sp. nov., holotype male (A–F) and paratype female, NIBRIV0000876680 (G). A, C–E, Pleopods Ⅰ–IV, respectively; B, Distal end of pleopod Ⅰ; F, Uropod; G, Pleopod II. Scale bar: A, C–G = 0.2 mm, B = 0.05 mm.
FIGURE 3 in Description of two new janirid isopods (Isopoda, Asellota, Janiridae) from Korean waters
FIGURE 3. Caecijaera ciliata sp. nov., holotype male. A, Mandible; B, Maxillula; C, Maxilla; D, Maxilliped; E–K, Pereopods Ⅰ–VII, respectively. Scale bars: A–K = 0.05 mm.
FIGURE 1 in Description of two new janirid isopods (Isopoda, Asellota, Janiridae) from Korean waters
FIGURE 1. Map of the type localities of one Caecijaera and four Janiralata species reported in the surrounding waters of Korea. 1, C. ciliata sp. nov.; 2, J. truncata sp. nov.; 3, J. shiinoi; 4, J. sagamiensis; 5, J. chuni; 6, C. derjugin.
FIGURE 2 in Description of two new janirid isopods (Isopoda, Asellota, Janiridae) from Korean waters
FIGURE 2. Caecijaera ciliata sp. nov., holotype male, NIBRIV0000897186. A, Habitus, dorsal view; B, Lateral margins of pereonites 4 and 5; C, Pleotelson, dorsal view; D, Antennula; E, Antenna. Scale bars: A = 0.5 mm, C–E = 0.2 mm.
FIGURE 7 in Three new species of the genus Ischnomesus (Isopoda: Asellota: Ischnomesidae) from Brazilian deep sea
FIGURE 7. Ischnomesus longiseta sp. nov., male paratype adult, 3 mm, ATEX, (MOUFPE 15.569). A, habitus; B, lateral view; C, ventral view. Scale = 1 mm.
FIGURE 16 in Three new species of the genus Ischnomesus (Isopoda: Asellota: Ischnomesidae) from Brazilian deep sea
FIGURE 16. Geographic distribution of Ischnomesus wilsoni sp. nov. in Brazilian waters. Samples collected in Espírito Santo Basin and Campos Basin. Map produced through Geomar online.
FIGURE 10 in Three new species of the genus Ischnomesus (Isopoda: Asellota: Ischnomesidae) from Brazilian deep sea
FIGURE 10. Ischnomesus longiseta sp. nov., male paratype adult, 3 mm, ATEX, (MOUFPE 15.569). A, pleopod 1; B, pleopod 2; C, pleopod 3; D, pleopod 4. Scale = 0.1 mm.
FIGURE 3 in Three new species of the genus Ischnomesus (Isopoda: Asellota: Ischnomesidae) from Brazilian deep sea
FIGURE 3. Ischnomesus hirsutus sp. nov., paratype adult female, 11 mm, SLN, (MOUFPE 15.543). A, maxilliped; B, maxillula; C, maxilla; D, paragnaths; E, right mandible; F, left mandible. Scale = 0.1 mm.
FIGURE 14 in Three new species of the genus Ischnomesus (Isopoda: Asellota: Ischnomesidae) from Brazilian deep sea
FIGURE 14. Ischnomesus wilsoni sp. nov. holotype female, 15 mm, EXT3 LEAD2, (MOUFPE 15.535). A, maxilliped; B, maxillula; C, maxilla; D, paragnaths; E, right mandible; F, left mandible. Scale = 0.1 mm.
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