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41 results for “Jesogammarus”
Fig. 2 in Pseudorhadinorhynchus samegaiensis (Acanthocephala: Echinorhynchida: Illiosentidae) Uses the Amphipod Jesogammarus (Annanogammarus) fluvialis as an Intermediate Host in a Stream of the Lake Biwa Basin, Central Japan
Fig. 2. Developmental stages of Pseudorhadinorhynchus samegaiensis. A, Male acanthella; B, early male cystacanth with part of proboscis and copulatory bursa everted, same individual as "c" in Fig. 1B; C, early female cystacanth; D, fully developed male cystacanth with everted proboscis; E, fully developed female cystacanth with everted proboscis; F, everted proboscis of fully developed female cystacanth (E). Scale bars: A, 300 µm; B–E, 500 µm; F, 200 µm.
Fig. 8 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 8. Jesogammarus (Jesogammarus) hebeiensis, new species, male. A. pleopod 1, B. pleopod 2, C. pleopod 3, D. uropod 1, E. uropod 2, F. uropod 3.
Fig. 4 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 4. Jesogammarus (Jesogammarus) fontanus, new species, paratype, female. A. coxal plate 1 (inner face), B. coxal plate 2 (inner face), C. coxal plate 3, D. coxal plate 4, E. oostegite of gnathopod 2, F. uropod 3, G. propodus of gnathopod 1, H. propodus of gnathopod 2, I. basis of pereopod 5, J. basis of pereopod 6, K. basis of pereopod 7.
Fig. 6 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 6. Jesogammarus (Jesogammarus) hebeiensis, new species, male. A. gnathopod 1, B. gnathopod 2, C. pereopod 3, D. pereopod 4, E. propodus of gnathopod 1, F. propodus of gnathopod 2, G. dactylus of pereopod 3, H. dactylus of pereopod 4.
Fig. 3 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 3. Jesogammarus (Jesogammarus) fontanus, new species, holotype, male. A. pereopod 3, B. pereopod 4, C. pereopod 5, D. pereopod 6, E. pereopod 7, F. dactylus of pereopod 3, G. dactylus of pereopod 4, H. dactylus of pereopod 5, I. dactylus of pereopod 6, J. dactylus of pereopod 7, K. coxal gill of gnathopod 2, L. coxal gill of pereopod 3, M. coxal gill of pereopod 4, N. coxal gill of pereopod 5, O. coxal gill of pereopod 6, P. coxal gill of pereopod 7.
Fig. 5 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 5. Jesogammarus (Jesogammarus) hebeiensis, new species, male. A. head, B. pleonites (dorsal view), C. urosomites, D. antenna 1, E. antenna 2, F. lower lip, G. upper lip, H. maxilliped, I. left maxilla 1, J. palp of right maxilla 1, K. maxilla 2, L. incisor of right mandible, M. left mandible.
Fig. 7 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 7. Jesogammarus (Jesogammarus) hebeiensis, new species, male. A. pereopod 5, B. pereopod 6, C. pereopod 7, D. dactylus of pereopod 5, E. dactylus of pereopod 6, F. dactylus of pereopod 7, G. epimeral plate 1, H. epimeral plate 2, I. epimeral plate 3, J. telson, K. coxal gill of gnathopod 2, L. coxal gill of pereopod 3, M. coxal gill of pereopod 4, N. coxal gill of pereopod 5, O. coxal gill of pereopod 6, P. coxal gill of pereopod 7.
Fig. 1 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 1. Jesogammarus (Jesogammarus) fontanus, new species, holotype, male. A. head, B. pleonites, C. urosomites, D. antenna 2, E. antenna 1, F. epimeral plate 1, G. epimeral plate 2, H. epimeral plate 3, I. maxilla 2, J. lower lip, K. upper lip, L. outer plate of maxilla 1, M. right palp of maxilla 1, N. left maxilla 1, O. left mandible, P. right mandible, Q. maxilliped.
Fig. 2 in Two New Freshwater Species Of The Genus Jesogammarus (Crustacea: Amphipoda: Anisogammaridae) From China
Fig. 2. Jesogammarus (Jesogammarus) fontanus, new species, holotype, male. A. gnathopod 1, B. gnathopod 2, C. propodus of gnathopod 1, D. propodus of gnahtopod 1 (inner face), E. propodus of gnathopod 2, F. uropod 3, G. uropod 1, H. uropod 2, I. pleopod 1, J. telson.
Figure 2 from: Tomikawa K, Kimura N (2021) On the brink of extinction: a new freshwater amphipod Jesogammarus acalceolus (Anisogammaridae) from Japan. ZooKeys 1065: 81-100. https://doi.org/10.3897/zookeys.1065.71687
Figure 2 Maximum likelihood tree and ancestral state reconstructions for calceolus on male antenna 2. Filled circles at each species represent states of habitat; pie charts at internal nodes present proportional likelihoods of reconstruction. Key nodes are labelled with the proportional likelihood of the presence or absence of the calceolus on male antenna 2, which was reconstructed as most likely to be at that node.
Figure 3 from: Tomikawa K, Kimura N (2021) On the brink of extinction: a new freshwater amphipod Jesogammarus acalceolus (Anisogammaridae) from Japan. ZooKeys 1065: 81-100. https://doi.org/10.3897/zookeys.1065.71687
Figure 3 Jesogammarus (Jesogammarus) acalceolus sp. nov., male (7.4 mm), NSMT-Cr 29003 A habitus, lateral view B–D dorsal margins of pleonites 1–3, respectively, dorsal views E–G dorsal margins of urosomites 1–3, respectively, dorsal views H peduncular articles 1–3, accessory flagellum, and flagellar articles 1–4 of antenna 1, medial view I aesthetasc and associate setae on the flagellum of antenna 1, medial view J peduncular articles 1–5 and flagellar articles 1–3 of antenna 2, medial view K upper lip, posterior view L right mandible, medial view M–N incisor and lacinia mobilis of left and right mandibles, medial views O lower lip, ventral view P maxilla 1, medial view Q serrate robust setae on outer plate of maxilla 1, medial view.
Figure 4 from: Tomikawa K, Kimura N (2021) On the brink of extinction: a new freshwater amphipod Jesogammarus acalceolus (Anisogammaridae) from Japan. ZooKeys 1065: 81-100. https://doi.org/10.3897/zookeys.1065.71687
Figure 4 Jesogammarus (Jesogammarus) acalceolus sp. nov., male (7.4 mm), NSMT-Cr 29003 A maxilla 2, medial view B maxilliped, dorsal view C gnathopod 1, medial view D palmar margin of propodus and dactylus of gnathopod 1, medial view, some setae omitted E gnathopod 2, medial view F palmar margin of propodus and dactylus of gnathopod 2, medial view, some setae omitted G–I coxa-ischium of pereopods 5–7, respectively, lateral views J–O coxal gills on gnathopod 2–pereopod 7, respectively, lateral views P pleopod 1, lateral view, distal parts of rami omitted Q retinacula on peduncle of pleopod 1, lateral view R–S uropods 1–2, respectively, dorsal views T uropod 3, ventral view U distal part of proximal article and terminal article of outer ramus of uropod 3, ventral view V telson, dorsal view.
Figure 5 from: Tomikawa K, Kimura N (2021) On the brink of extinction: a new freshwater amphipod Jesogammarus acalceolus (Anisogammaridae) from Japan. ZooKeys 1065: 81-100. https://doi.org/10.3897/zookeys.1065.71687
Figure 5 Jesogammarus (Jesogammarus) acalceolus sp. nov., female (7.3 mm), NSMT-Cr 29004 A peduncular articles 1–3, accessory flagellum, and flagellar articles 1–4 of antenna 1, medial view B peduncular articles 1–5 and flagellar articles 1–3 of antenna 2, medial view C ischium-dactylus of gnathopod 1, medial view D palmar margin of propodus and dactylus of gnathopod 1, medial view, some setae omitted E ischium-dactylus of gnathopod 2, medial view F palmar margin of propodus and dactylus of gnathopod 2, medial view, some setae omitted G–I coxa-ischium of pereopods 5–7, respectively, lateral views J brood plate on gnathopod 2, lateral view K uropod 3, ventral view.
Figure 1 from: Tomikawa K, Kimura N (2021) On the brink of extinction: a new freshwater amphipod Jesogammarus acalceolus (Anisogammaridae) from Japan. ZooKeys 1065: 81-100. https://doi.org/10.3897/zookeys.1065.71687
Figure 1 Habitat and live specimens of Jesogammarus (Jesogammarus) acalceolus sp. nov. A the type locality, Haguro Shrine Spring, Hirosaki, Aomori Prefecture, Japan B mate guarding pair, male is upper and female is lower, photographed by Ryu Uchiyama.
Fig. 1 in Pseudorhadinorhynchus samegaiensis (Acanthocephala: Echinorhynchida: Illiosentidae) Uses the Amphipod Jesogammarus (Annanogammarus) fluvialis as an Intermediate Host in a Stream of the Lake Biwa Basin, Central Japan
Fig. 1. Jesogammarus (Annanogammarus) fluvialis infected with two fully developed cystacanths (a, b) and one early cystacanth (c) of Pseudorhadinorhynchus samegaiensis. A, Lateral view of amphipod harboring three cystacanths in hemocoel; B, three cystacanths dissected free from amphipod. Note faint orange spots (a, b) in amphipod's hemocoel (A) and faint orange body surface of cystacanths (B). Scale bars: A, 2 mm; B, 1 mm.
Figure 11 from: Tomikawa K, Nakano T, Hanzawa N (2017) Two new species of Jesogammarus from Japan (Crustacea, Amphipoda, Anisogammaridae), with comments on the validity of the subgenera Jesogammarus and Annanogammarus. Zoosystematics and Evolution 93(2): 189-210. https://doi.org/10.3897/zse.93.12125
Figure 11 - Jesogammarus uchiyamaryui sp. n., holotype, male (10.3 mm), NSMT-Cr 25474. A maxilla 1, dorsal view; B outer plate of maxilla 1, dorsal view; C maxilla 2, dorsal view; D maxilliped, dorsal view; E gnathopod 1, lateral view; F palmar margin of propodus of gnathopod 1, lateral view; G gnathopod 2, lateral view; H palmar margin of propodus of gnathopod 2, lateral view; I pereopod 3, lateral view; J pereopod 4, lateral view.
Figure 12 from: Tomikawa K, Nakano T, Hanzawa N (2017) Two new species of Jesogammarus from Japan (Crustacea, Amphipoda, Anisogammaridae), with comments on the validity of the subgenera Jesogammarus and Annanogammarus. Zoosystematics and Evolution 93(2): 189-210. https://doi.org/10.3897/zse.93.12125
Figure 12 - Jesogammarus uchiyamaryui sp. n., holotype, male (10.3 mm), NSMT-Cr 25474. A coxa–ischium of pereopod 5, lateral view; B coxa–ischium of pereopod 6, lateral view; C coxa–ischium of pereopod 7, lateral view; D–I coxal gills on gnathopod 2 and pereopods 3–7, lateral views; J pleopod 1, lateral view, distal parts of rami omitted; K bifid plumose seta (clothes-pin seta) on inner basal margin of inner ramus of pleopod 1, lateral view; L retinacula on peduncle of pleopod 1, lateral view; M uropod 1, dorsal view; N uropod 2, dorsal view; O uropod 3, dorsal view; P telson, dorsal view.
Figure 13 from: Tomikawa K, Nakano T, Hanzawa N (2017) Two new species of Jesogammarus from Japan (Crustacea, Amphipoda, Anisogammaridae), with comments on the validity of the subgenera Jesogammarus and Annanogammarus. Zoosystematics and Evolution 93(2): 189-210. https://doi.org/10.3897/zse.93.12125
Figure 13 - Jesogammarus uchiyamaryui sp. n., paratype, female (9.2 mm), NSMT-Cr 25475. A peduncular articles 1–3, accessory flagellum, and flagellar articles 1–3 of antenna 1, medial view; B peduncular articles 1–5 and flagellar articles 1–3 of antenna 2, medial view; C gnathopod 1, lateral view; D palmar margin of propodus of gnathopod 1, lateral view; E gnathopod 2, lateral view; F palmar margin of propodus of gnathopod 2, lateral view; G brood plate of gnathopod 2, lateral view; H coxa–ischium of pereopod 5, lateral view; I coxa–ischium of pereopod 6, lateral view; J coxa–ischium of pereopod 7, lateral view; K uropod 3, dorsal view.
Figure 14 from: Tomikawa K, Nakano T, Hanzawa N (2017) Two new species of Jesogammarus from Japan (Crustacea, Amphipoda, Anisogammaridae), with comments on the validity of the subgenera Jesogammarus and Annanogammarus. Zoosystematics and Evolution 93(2): 189-210. https://doi.org/10.3897/zse.93.12125
Figure 14 - Jesogammarus uchiyamaryui sp. n., not preserved, precopula pair (male: upper, female: lower). Photographed by Ryu Uchiyama.
Figure 3 from: Tomikawa K, Nakano T, Hanzawa N (2017) Two new species of Jesogammarus from Japan (Crustacea, Amphipoda, Anisogammaridae), with comments on the validity of the subgenera Jesogammarus and Annanogammarus. Zoosystematics and Evolution 93(2): 189-210. https://doi.org/10.3897/zse.93.12125
Figure 3 - Jesogammarus bousfieldi sp. n., holotype, male (9.8 mm), NSMT-Cr 25470. A–C dorsal margins of pleonites 1–3, respectively, dorsal views; D–F epimeral plates 1–3, respectively, lateral views; G–I dorsal margins of urosomites 1–3, respectively, dorsal views; J peduncular articles 1–3, accessory flagellum, and flagellar articles 1–3 of antenna 1, medial view; K peduncular articles 1–5 and flagellar articles 1–3 of antenna 2, medial view; L calceolus of antenna 2, medial view; M upper lip, anterior view; N left mandible, medial view; O incisor and lacinia mobilis of left mandible, lateral view; P incisor and lacinia mobilis of right mandible, lateral view; Q lower lip, ventral view.
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