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175 results for “Sea spider”
Figure 6. Nymphon ortmanni Helfer, 1938, ZIHU 4103 in Sea spiders of the genus Nymphon (Arthropoda: Pycnogonida) from waters around the Nansei Islands, Japan
Figure 6. Nymphon ortmanni Helfer, 1938, ZIHU 4103, non-type, male. (A) Trunk, dorsal view; (B) chelifore; (C) palp; (D) oviger; (E) enlargement of distal segments of oviger; (F) third leg; (G) enlargement of distal segments of third leg. Scale bars: A, C, F, G, 1 mm; B, D, 0.5 mm; E, 0.25 mm.
Figure 5 in Sea spiders of the genus Nymphon (Arthropoda: Pycnogonida) from waters around the Nansei Islands, Japan
Figure 5. Nymphon nagannuense sp. nov., ZIHU 3329, holotype, male. (A) Trunk, dorsal view; (B) trunk, lateral view; (C) chelifore; (D) palp; (E) oviger; (E) third leg; (F) enlargement of distal segments of oviger; (G) third leg; (H) enlargement of distal segments of third leg. Scale bars: G, 1 mm; A, B, E, H, 0.5 mm; D, F, 0.25 mm; C, 0.1 mm.
Figure 3. Nymphon falcatum Utinomi, 1955, ZIHU 4092 in Sea spiders of the genus Nymphon (Arthropoda: Pycnogonida) from waters around the Nansei Islands, Japan
Figure 3. Nymphon falcatum Utinomi, 1955, ZIHU 4092, non-type, female. (A) Trunk, dorsal view; (B) trunk, lateral view; (C) chelifore; (D) palp; (E) oviger; (F) enlargement of distal segments of oviger; (G) third leg; (H) enlargement of distal segments of third leg. Scale bars: A, B, G, H, 1 mm; C, E, 0.5 mm; D, F, 0.25 mm.
Figure 4. Nymphon japonicum Ortmann, 1890, ZIHU 4093 in Sea spiders of the genus Nymphon (Arthropoda: Pycnogonida) from waters around the Nansei Islands, Japan
Figure 4. Nymphon japonicum Ortmann, 1890, ZIHU 4093, non-type, male. (A) Trunk, dorsal view; (B) trunk, lateral view; (C) chelifore; (D) palp; (E) oviger; (F) third leg; (G) enlargement of distal segments of third leg. Scale bars: 1 mm.
Figure 2. Nymphon falcatum Utinomi, 1955, ZIHU 4088 in Sea spiders of the genus Nymphon (Arthropoda: Pycnogonida) from waters around the Nansei Islands, Japan
Figure 2. Nymphon falcatum Utinomi, 1955, ZIHU 4088, non-type, male. (A) Trunk, dorsal view; (B) trunk, lateral view; (C) chelifore; (D) palp; (E) oviger; (F) enlargement of distal segments of oviger; (G) third leg. Scale bars: A–C, G, 1 mm; D, E, 0.25 mm; F, 0.1 mm.
Figure 1 in Sea spiders of the genus Nymphon (Arthropoda: Pycnogonida) from waters around the Nansei Islands, Japan
Figure 1. Map of Japan showing the location of the Nansei Islands (box); (below) enlargement of box, showing the Nansei Islands and the collection sites (solid circles).
Figure 7 in Sea spiders of the genus Nymphon (Arthropoda: Pycnogonida) from waters around the Nansei Islands, Japan
Figure 7. Nymphon plectrum sp. nov., ZIHU 3331, holotype, male. (A) Trunk, dorsal view; (B) trunk, lateral view; (C) cephalic parts, lateral view; (D) chela; (E) palp; (F) oviger; (G) enlargement of distal segments of oviger; (H) third leg; (I) enlargement of distal segments of third leg. Scale bars: A–C, F, H, 1 mm; D, E, I, 0.25 mm; G, 0.1 mm.
FIGURE 4. Parapleisticantha ludivinae n in Parapleisticantha Yokoya, 1933, a valid genus of deep-sea inachid spider crab from Japan and the Philippines (Crustacea: Decapoda: Brachyura: Majoidea), with the description of a new species
FIGURE 4. Parapleisticantha ludivinae n. sp. Male holotype (22.9 × 19.2 mm) (NMCR), Balicasag Is., Philippines. A, habitus; B, dorsal view of carapace; C, frontal view showing epistome, antennules and antennae.
FIGURE 2. Parapleisticantha japonica Yokoya, 1933. Lectotype male 22.4 in Parapleisticantha Yokoya, 1933, a valid genus of deep-sea inachid spider crab from Japan and the Philippines (Crustacea: Decapoda: Brachyura: Majoidea), with the description of a new species
FIGURE 2. Parapleisticantha japonica Yokoya, 1933. Lectotype male 22.4 × 16.8 mm (KMNH), Goto Is., Japan. A, frontal view showing rostrum and eyes; B, ventral view showing anterior thoracic sternum and abdomen; C, left third maxilliped; D, lateral view of carapace; E, outer view of left chela.
FIGURE 6. A–E in Parapleisticantha Yokoya, 1933, a valid genus of deep-sea inachid spider crab from Japan and the Philippines (Crustacea: Decapoda: Brachyura: Majoidea), with the description of a new species
FIGURE 6. A–E, Parapleisticantha japonica Yokoya, 1933, lectotype male (22.4 × 16.8 mm) (KMNH), Goto Is., Japan; F–I, Parapleisticantha ludivinae n. sp., male holotype (22.9 × 19.2 mm) (NMCR), Balicasag Is., Philippines. A, F, ventral view of left G1; B, G, dorsal view of left G1; C, H, distal part of left G1, ventral view; D, I, tip of left G1, ventral view; E, left G2. Scales: A, B, F, G = 1.0 mm; C, E, H = 0.5 mm; D, I = 0.05 mm.
FIGURE 1. Parapleisticantha japonica Yokoya, 1933 in Parapleisticantha Yokoya, 1933, a valid genus of deep-sea inachid spider crab from Japan and the Philippines (Crustacea: Decapoda: Brachyura: Majoidea), with the description of a new species
FIGURE 1. Parapleisticantha japonica Yokoya, 1933. Lectotype male (22.4 × 16.8 mm) (KMNH), Goto Is., Japan. A, habitus; B, dorsal view of carapace; C, ventral view of cephalothorax showing epistome, antennules and antennae.
FIGURE 3. Parapleisticantha japonica Yokoya, 1933 in Parapleisticantha Yokoya, 1933, a valid genus of deep-sea inachid spider crab from Japan and the Philippines (Crustacea: Decapoda: Brachyura: Majoidea), with the description of a new species
FIGURE 3. Parapleisticantha japonica Yokoya, 1933. Paralectotype ovigerous female (16.6 x 13.1 mm) (KMNH), Goto Is., Japan. A, habitus; B, dorsal view of carapace; C, ventral view showing anterior thoracic sternum and abdomen.
FIGURE 5. Parapleisticantha ludivinae n in Parapleisticantha Yokoya, 1933, a valid genus of deep-sea inachid spider crab from Japan and the Philippines (Crustacea: Decapoda: Brachyura: Majoidea), with the description of a new species
FIGURE 5. Parapleisticantha ludivinae n. sp. Male holotype (22.9 × 19.2 mm) (NMCR), Balicasag Is., Philippines. A, frontal view showing rostrum and eyes; B, ventral view showing anterior thoracic sternum and abdomen; C, left lateral view of carapace; D, outer view of right chela.
FIGURE 2 in Ecology determines appearance: a new taxonomic solution for the soft bottom dwelling spider crab Pisoides bidentatus (A. Milne-Edwards, 1873) from the Sea of Japan, with remarks on Pisoides ortmanni (Balss, 1924) and the northwestern Pacific Pugettia Dana, 1851 (Majoidea: Epialtidae)
FIGURE 2. Scyra bidentata (A. Milne-Edwards, 1873) comb. nov., ZMMU Ma-6228, coloration and camouflage (dorsal view) of living specimens, Vostok Bay of the Sea of Japan. Scale 10 mm.
FIGURE 6 in Ecology determines appearance: a new taxonomic solution for the soft bottom dwelling spider crab Pisoides bidentatus (A. Milne-Edwards, 1873) from the Sea of Japan, with remarks on Pisoides ortmanni (Balss, 1924) and the northwestern Pacific Pugettia Dana, 1851 (Majoidea: Epialtidae)
FIGURE 6. Scyra bidentata (A. Milne-Edwards, 1873) comb. nov., ZMMU Ma-6226, ♁, gonopod I (a–f) and gonopod II (g–j): a—gonopod I, general view; b–f—tip of gonopod I, different views; g,h—gonopod II, different views; i, j—tip of gonopod II, different views. Scale 1 mm.
FIGURE 1 in Ecology determines appearance: a new taxonomic solution for the soft bottom dwelling spider crab Pisoides bidentatus (A. Milne-Edwards, 1873) from the Sea of Japan, with remarks on Pisoides ortmanni (Balss, 1924) and the northwestern Pacific Pugettia Dana, 1851 (Majoidea: Epialtidae)
FIGURE 1. Bayesian and Maximum Likelihood phylogenetic trees of the family Epialtidae for combined molecular data (concatenated sequences from COI, 16S rRNA and 18S rRNA gene fragments). Number above or under the brunches are Bayesian posterior probabilities and bootstrap values for ML analysis.
FIGURE 4 in Ecology determines appearance: a new taxonomic solution for the soft bottom dwelling spider crab Pisoides bidentatus (A. Milne-Edwards, 1873) from the Sea of Japan, with remarks on Pisoides ortmanni (Balss, 1924) and the northwestern Pacific Pugettia Dana, 1851 (Majoidea: Epialtidae)
FIGURE 4. Scyra bidentata (A. Milne-Edwards, 1873) comb. nov., ZMMU Ma XXXX, ♁ (a, c, e–g), ♀ (b, d), fixed specimens, Vostok Bay of the Sea of Japan: a, b—carapace (lateral view); c, d—front of carapace, ventral view; e—front of carapace, lateral view; f—front of carapace, dorsal view; g—carapace and sternites, ventral view. Scale 5 mm.
FIGURE 5 in Ecology determines appearance: a new taxonomic solution for the soft bottom dwelling spider crab Pisoides bidentatus (A. Milne-Edwards, 1873) from the Sea of Japan, with remarks on Pisoides ortmanni (Balss, 1924) and the northwestern Pacific Pugettia Dana, 1851 (Majoidea: Epialtidae)
FIGURE 5. Scyra bidentata (A. Milne-Edwards, 1873) comb. nov., ♁, ZMMU Ma-6226 (a, b), ♀, ZMMU Ma-6227 (c), fixed specimens, Vostok Bay of the Sea of Japan: a—chela of pereiopod I (chelipeds), outer view; b—pereiopod II; c—sterno-pleonal cavity. Scale 5 mm.
FIGURE 3 in Ecology determines appearance: a new taxonomic solution for the soft bottom dwelling spider crab Pisoides bidentatus (A. Milne-Edwards, 1873) from the Sea of Japan, with remarks on Pisoides ortmanni (Balss, 1924) and the northwestern Pacific Pugettia Dana, 1851 (Majoidea: Epialtidae)
FIGURE 3. Scyra bidentata (A. Milne-Edwards, 1873) comb. nov., ZMMU Ma-6226 (♁) and Ma-6227 (♀), fixed specimens (dorsal view), Vostok Bay of the Sea of Japan. Scale 10 mm.
Data from: Newly discovered morphology of the Silurian sea spider Haliestes and its implications
<p>The three-dimensionally preserved Haliestes dasos from the Silurian (Wenlock) Lagerstätte is the most complete fossil sea spider and the oldest unambiguous pycnogonid known from the fossil record. The discovery of two new specimens to add to the holotype reveals new features including proximal annulations of the appendages and segmentation of the trunk end, critical details for comparison with pycnogonids from the Devonian (Emsian) Hunsrück Slate and for the interpretation of the evolutionary significance of Palaeozoic genera. There is some evidence of sexual dimorphism. H. dasos was nektobenthic and its morphology indicates an unusual mode of feeding compared to living pycnogonids. The new morphological features of H. dasos are closely similar to those in Palaeoisopus problematicus from the Hunsrück Slate and it clearly belongs, together with that species, in stem Pycnogonida and not the crown group.</p>
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