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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.

FIGURE 2. Athanas exilis n in A new species of the alpheid shrimp genus Athanas Leach, 1814 (Decapoda: Caridea) from the Sea of Japan

FIGURE 2. Athanas exilis n. sp., holotype, ovigerous female (cl 4.8 mm), CBM-ZC 17112. A, carapace and cephalic appendages, left lateral view; B, anterior part of carapace and cephalic appendages, left lateral view; C, same, dorsal view; D, pleon, telson and pleonal appendages, left lateral view; E, posterior part of pleomere 5 and pleomere 6, left lateral view; F, telson, dorsal view; G, left antennal scaphocerite, dorsal view (setae omitted); H, right uropod, dorsal view.

FIGURE 1. Athanas exilis n in A new species of the alpheid shrimp genus Athanas Leach, 1814 (Decapoda: Caridea) from the Sea of Japan

FIGURE 1. Athanas exilis n. sp., holotype, ovigerous female (cl 4.8 mm), CBM-ZC 17112, showing colouration in life. A, habitus in dorsal view; B, habitus in ventrolateral view. Photos taken by Y. Henmi.

FIGURE 4. Athanas exilis n in A new species of the alpheid shrimp genus Athanas Leach, 1814 (Decapoda: Caridea) from the Sea of Japan

FIGURE 4. Athanas exilis n. sp., holotype, ovigerous female (cl 4.8 mm), CBM-ZC 17112. A, close up of ventrolateral margin of ischium of right cheliped; B, carpus of right cheliped, extensor view; C, merus and carpus of right cheliped, ventrolateral view; D, chela of right cheliped, extensor view; E, same, ventrolateral view; F–H, dactyli of pereopods 3–5, lateral view.

FIGURE 3. Athanas exilis n in A new species of the alpheid shrimp genus Athanas Leach, 1814 (Decapoda: Caridea) from the Sea of Japan

FIGURE 3. Athanas exilis n. sp., holotype, ovigerous female (cl 4.8 mm), CBM-ZC 17112. A, left maxilliped 3 and pereopod 1 (in process of regeneration), lateral view; B, coxae of chelipeds (pereopods 1) (basal part of right pereopod 2 also shown); C, basis of right cheliped, lateral view; D, right cheliped, lateral view; E, same, mesial view; F, left pereopod 2, lateral view; G–I, left pereopods 3–5, lateral view. Abbreviations: EXP = exopod; P1 = pereopod 1; P2 = pereopod 2

opencc-by-4.0May 2023View details →

Deep subduction of the Philippine Sea slab and formation of slab window beneath central Japan

<p>The travel-time data, the velocity model from seismic tomography and the temperature distributions from numerical simulation.</p>

Fig. 4 in A New Species of the Genus Ophiomonas Djakonov (Echinodermata: Ophiuroidea: Amphilepididae) from the Deep-Sea of Japan

Fig. 4. Ophiomonas shinseimaruae sp. n. (Holotype, NSMT E-13546). SEM photographs of vertebrae on proximal (A–E) and middle portion (F) of arms, proximal (A, F), distal (B), dorsal (C), ventral (D) and lateral (E) views. Blue areas indicate grooves. Arrows indicate orientation: d, dorsal; dis, distal; pro, proximal; v, ventral. Abbreviations: DF, dorsal muscle fossae; FB, foot basin; PR, protrusion; VF, ventral muscle fossae. Scale bars = 100 μm.

Fig. 3 in A New Species of the Genus Ophiomonas Djakonov (Echinodermata: Ophiuroidea: Amphilepididae) from the Deep-Sea of Japan

Fig. 3. Ophiomonas shinseimaruae sp. n. (Holotype, NSMT E-13546). (A) dorsal distal portion of arm; (B–D), ventral proximal (B), middle (C) and distal (D) portion of arms; (E, F) lateral proximal (E) and distal (F) portion of arms. Abbreviations: AS, arm spine; DAP, dorsal arm plate; LAP, lateral arm plate; TS, tentacle scale; VAP, ventral arm plate. Scale bars = 1 mm.

Fig. 2 in A New Species of the Genus Ophiomonas Djakonov (Echinodermata: Ophiuroidea: Amphilepididae) from the Deep-Sea of Japan

Fig. 2. Ophiomonas shinseimaruae sp. n. (Holotype, NSMT E-13546). (A) dorsal whole body, alive; (B) ventral whole body, alive; (C) dorsal disc and proximal portion of arms; (D) central dorsal disc; (E) peripheral dorsal disc; (F) ventral disc; (G) ventral interradial disc; (H) dorsal proximal portion of arm; (I) dorsal middle portion of arm. Abbreviations: AdSh, adoral shield; AdShSp, adoral shield spine; AS, arm spine; BSc, buccal scale; CPP, central primary plate; DAP, dorsal arm plate; GS, genital slit; IPa, infradental papilla; LAP, lateral arm plate; OP, oral plate; OSh, oral shield; PP, primary plate; RS, radial shield; T, tooth; TS, tentacle scale. VAP, ventral arm plate. Scale bars = 1 mm.

Fig. 5 in A New Species of the Genus Ophiomonas Djakonov (Echinodermata: Ophiuroidea: Amphilepididae) from the Deep-Sea of Japan

Fig. 5. Ophiomonas shinseimaruae sp. n. (Holotype, NSMT E-13546), SEM photographs of vertebrae on middle (A–D) and distal portion (E, F) of arms, proximal (A, F), dorsal (B), ventral (C), lateral (D), distal (E) views. Blue areas indicate grooves. (F) is partly broken. Arrows indicate orientation: d, dorsal; dis, distal; pro, proximal; v, ventral. Abbreviations: FB, foot basin; DF, dorsal muscle fossae; PR, protrusion; VF, ventral muscle fossae. Scale bars = 100 μm.

Fig. 8 in A New Species of the Genus Ophiomonas Djakonov (Echinodermata: Ophiuroidea: Amphilepididae) from the Deep-Sea of Japan

Fig. 8. Ophiomonas shinseimaruae sp. n. (A paratype, NSMT E-13550). (A, B) SEM photographs of dental plate, external (A) and internal (B) views. Arrows indicate orientation: d, dorsal; v, ventral. Dashed circles indicate septum. Abbreviations: TS, tooth socket. Scale bars = 100 μm.

Fig. 6 in A New Species of the Genus Ophiomonas Djakonov (Echinodermata: Ophiuroidea: Amphilepididae) from the Deep-Sea of Japan

Fig. 6. Ophiomonas shinseimaruae sp. n. (Holotype, NSMT E-13546), SEM photographs of vertebrae on distal portion of arm (A–C) and lateral arm plates (D–I) from proximal (D, E), middle (F, G) and distal (H, I) portion of arms, dorsal (A), ventral (B) and lateral (C) views, external (D, F, H) and internal (E, G, I) views. Blue areas indicate grooves (A, B). (A) is partly broken. Arrows indicate orientation: d, dorsal; dis, distal; pro, proximal; v, ventral. Arrowheads indicate depressed bridge (white) and stereom protuberances (black). Abbreviations: K, knob; DL, dorsal lobe; FB, foot basin; H, hole; MO, muscular opening; NO, nerve opening; P, perforation; PR, protrusion; TN, tentacle notch; VL, ventral lobe. Scale bars = 100 μm.

Fig. 7 in A New Species of the Genus Ophiomonas Djakonov (Echinodermata: Ophiuroidea: Amphilepididae) from the Deep-Sea of Japan

Fig. 7. Ophiomonas shinseimaruae sp. n. (Holotype, NSMT E-13546). SEM photographs of ossicles, (A–F), dorsal arm plates from proximal (A, B), middle (C, D) and distal (E, F) portion of arms; (G–L) ventral arm plates from proximal (G, H), middle (I, J) and distal (K, L) portion of arms, external (A, C, E, G, I, K) and internal (B, D, F, H, J, L) views; (M–P) arm spines from proximal (M, N) and distal (O, P) portion of arms, dorsalmost (M, O) and ventralmost (N, P) ones. Arrows indicate orientation: ba, basal; dis, distal; ex, external; pro, proximal. Scale bars = 100 μm.