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20 results for “gnathopod”
FIGURE 23 Hyalella solida Chevreux, 1907. A, male left gnathopod II in The Hyalella species flock of Lake Titicaca (Crustacea: Amphipoda): perspectives and drawbacks of DNA-based identiFIcation
FIGURE 23 Hyalella solida Chevreux, 1907. A, male left gnathopod II, medial (armature along palm margin of propodus omitted); B, inset of palm margin of latter, medial; C, distal portion of left female gnathopod II, medial. Scale bars: 0.2 mm (A); 0.1 mm (B, C).
FIGURE 22 Hyalella solida Chevreux, 1907. A, male right gnathopod I in The Hyalella species flock of Lake Titicaca (Crustacea: Amphipoda): perspectives and drawbacks of DNA-based identiFIcation
FIGURE 22 Hyalella solida Chevreux, 1907. A, male right gnathopod I, medial; B, inset of distal portion of latter, medial; C, disarticulated left maxilliped, anterior (= dorsal). Scale bars: 0.2 mm (A); 0.1 mm (B, C).
Fig. 2. Cyproidea liodactyla Hirayama, 1978, male. A. head and antennae 12. B. left mandible. C. maxilla 1. D. maxilla 2. E. maxilliped. F. gnathopod 1. G in The first record of Cyproidea liodactyla (Crustacea: Amphipoda: Cyproideidae) from Korean waters
Fig. 2. Cyproidea liodactyla Hirayama, 1978, male. A. head and antennae 12. B. left mandible. C. maxilla 1. D. maxilla 2. E. maxilliped. F. gnathopod 1. G. dactylus of gnathopod 1, enlarged.
Fig. 3. Cyproidea liodactyla Hirayama, 1978, male. A. gnathopod 2. B in The first record of Cyproidea liodactyla (Crustacea: Amphipoda: Cyproideidae) from Korean waters
Fig. 3. Cyproidea liodactyla Hirayama, 1978, male. A. gnathopod 2. B. dactylus of gnathopod 2, enlarged. C. pereopod 3. D. pereopod 4. E. pereopod 5.
Fig. 6. 3D reconstructed male gnathopod 2 in Description of a new species of Quadrivisio Stebbing, 1907, from Songkhla Lake, Thailand (Crustacea: Peracarida: Amphipoda: Maeridae)
Fig. 6. 3D reconstructed male gnathopod 2 of Quadrivisio meufong, new species, male 13.5 mm, PSUZC-CR 0302. A, overall image of carpus, propodus, and dactylus of the male gnathopod 2; B, magnified, proximal view of the expanded palm cuticle. Arrow heads indicate expanded palm structure; oc, outer layer of cuticle; ic, inner layer of cuticle. Scale bars = 0.1 mm.
Fig. 4. Bogidiella veneris n. sp. from Venus Bay, South Australia. A, B, E, paratype 1 (3.0 mm female); C, D, F, paratype 3 (3.1 mm female). A, gnathopod 1; B, gnathopod 2; C, uropod 1; D, uropod 2; E, uropod 3; F, telson. Scale bar A-F 5 0.1 mm.
Fig. 4. Bogidiella veneris n. sp. from Venus Bay, South Australia. A, B, E, paratype 1 (3.0 mm female); C, D, F, paratype 3 (3.1 mm female). A, gnathopod 1; B, gnathopod 2; C, uropod 1; D, uropod 2; E, uropod 3; F, telson. Scale bar A-F 5 0.1 mm.
FIGURE 3. Male gnathopod 1 in A phylogeny and classification of the Talitroidea (Amphipoda, Senticaudata) based on interpretation of morphological synapomorphies and homoplasies
FIGURE 3. Male gnathopod 1 propodus anterior margin; 24.1 with 1–2 groups of robust setae (after Morino 2014); 24.2 with 3–4 groups of robust setae (after Marsden & Fenwick 1984); 24.3 with 5–9 groups of robust setae (after Lowry & Myers 2019a); 24. 4 with scattered groups of very short setae (after Bousfield 1982). Male gnathopod 1 propodus 25.1 subrectangular (after Stock & Martin 1988); 25.2 enlarged subrectangular (after Hurley 1957); 25.3 subovoid (after Jo 1988); 25.4 subtriangular with well developed posterodistal lobe (after Marsden & Fenwick, 1984)); 25.5 subrectangular tapering distally (after Shoemaker 1936). Male gnathopod 1 palm 26.1 transverse (White et al. 2013); 26.2 acute or obtuse (Friend 1982); 26.3 absent (after Lowry & Myers 2019a)
FIGURE 2. Male gnathopod 1. 23.2 in A phylogeny and classification of the Talitroidea (Amphipoda, Senticaudata) based on interpretation of morphological synapomorphies and homoplasies
FIGURE 2. Male gnathopod 1. 23.2 posterior margin of merus, carpus and proximal margin of propodus each with palmate setae (after Friend 1982); 23.1 posterior margin of merus, carpus and propodus each with patch of palmate setae (after Hurley 1957); 23.3a. posteriormargin of carpus and propodus each with patch of palmate setae (after Richardson 1991); 23.3b posterior margin of merus and carpus each with patch of palmate setae (after Friend 1987); 23.3c posterior margin of propodus with patch of palmate setae (after Hurley 1957); 23.3d posterior margin of carpus with patch of palmate setae (after Friend 1987); 23.4 posterior margin of merus, carpus and propodus each without patch of palmate setae (after Lowry & Myers 2019a).
FIGURE 4. Female gnathopod 2 merus. 27.2 in A phylogeny and classification of the Talitroidea (Amphipoda, Senticaudata) based on interpretation of morphological synapomorphies and homoplasies
FIGURE 4. Female gnathopod 2 merus. 27.2 posterodistal lappet present (after Bousfield 1982); male gnathopod 2 dactylus 28.1 unmodified, distally blunt (after Bousfield 1958); 28.2 recurved distally (after Afonso 1977); 28.3 attenuated distally (after Lowry & Myers 2019b); 28.4 slender, distally acute (after Chevreux, 1915); 28.5 stout, distally acute (after Stock & Martin 1988). Pereopods 3–7. 29.1 simplidactylate (after Friend 1979). 29.2 cuspidactylate (after Morino 2014, Stock & Abreu 1992). Pereopod 4 dactylus. 30.2. thickened (after Stock & Abreu 1992, Lowry & Coleman 2011).
FIGURE 4. Male gnathopod 2 dactylus and propodus. A in The genus Mallacoota (Crustacea, Amphipoda, Maeridae) in New Zealand
FIGURE 4. Male gnathopod 2 dactylus and propodus. A, Mallacoota nananui Myers, 1985, 6.3 mm, between Ilot des Goelands and Grand Recif Abore, New Caledonia, AM P47502; Mallacoota sp., B, 5.2 mm, Sandal Bay, Lifou, Loyalty Islands, AM P48000. Scale 0.2 mm.
FIGURE 10. Antenna 1, 2, gnathopod 1, 2 in Caprellidae (Crustacea: Peracarida: Amphipoda) from the Red Sea and Suez Canal, with the redescription of Metaprotella africana and Paradeutella multispinosa
FIGURE 10. Antenna 1, 2, gnathopod 1, 2 of male "a" and gnathopod 2 of female "b" of Paradeutella multispinosa.
FIGURE 6. Antenna 1, 2, gnathopod 1, 2 in Caprellidae (Crustacea: Peracarida: Amphipoda) from the Red Sea and Suez Canal, with the redescription of Metaprotella africana and Paradeutella multispinosa
FIGURE 6. Antenna 1, 2, gnathopod 1, 2 of male (MNHN Am-5252) and gnathopod 2 of female (MNHN Am-5253) of Metaprotella africana.
Fig. 8. Cheiriphotis erythraeus male gnathopod 2 in The morphological diversity within a species can obscure the correct identification
Fig. 8. Cheiriphotis erythraeus male gnathopod 2 (on the left), and the map of distribution range of C. erythraeus (triangle), Cheiriphotis mediterranea (circle), and Cheiriphotis williamsoni (square).
Figure 2. Characters 9–15. Gnathopod 2 in On the phylogeny of Ischyroceridae (Amphipoda, Senticaudata, Corophiida), with the description of a new genus and eight new species from deep-sea Brazilian waters
Figure 2. Characters 9–15. Gnathopod 2 male subchelate (9.1), carpochelate (9.2), (simple 9.3). Gnathopod 2 male, carpus shorter than propodus (10.1), longer than propodus (10.2), subequal to propodus (10.3). Gnathopod 2 female, carpus shorter than propodus (11.1), longer than propodus (11.2), subequal to propodus (11.3). Coxae 1–7. Coxae 1–5 longer than wide and coxae 6 and 7 wider than long (12.1); coxae 1–7 wider than long (12.2), coxae 1–4 longer than wide and coxae 5–7 wider than long (12.3). Coxa 4 margin smooth (13.1), serrate (13.2). Coxa 4 posterior margin not excavated (14.1), excavated (14.2). Coxa 5 with posterodorsal lobe (15.1), without posterodorsal lobe (15.2). Species: (9.1, 12.2, 13.1, 14.1) Bonnierella laurensi sp. nov.; (9.2, 10.3) Notopoma teresae sp. nov.; (12.3) Caribboecetes barbadensis Just, 1983 (redrawn from Just, 1984); (11.3) Runanga coxalis J.L. Barnard, 1961 (redrawn from J.L. Barnard, 1962); (9.3, 10.2, 11.2, 12.1, 15.2) Pseudericthonius bousfieldi sp. nov.; (10.1, 11.1, 14.2) Myersius spinicaudatus gen. et sp. nov. (12.1, 15.1) Pseudischyrocerus caecus sp. nov.
FIGURE 7. Gnathopods I–II in Toward a unified taxonomy of Niphargus (Crustacea: Amphipoda): a review of morphological variability
FIGURE 7. Gnathopods I–II. The following parameters were measured: depth and width of coxa II (cxw, cxd), width and length of basis (bl, bw), cl (carpus lenght), propodus length, width, diagonal (pl, pw, pd), basal and distal part of the dactylus (d1,2) (A, B, E: N. dalmatinus, male gnathopod I, C: N. dalmatinus, male gnathopod II, D: N. dalmatinus, female gnathopod II, note the sexually dimorphic shape of the coxa II). Note variable number of palmar (F–I, II: N. grandii [after Sket 1972]) and supporting spines (G: N. kenki [after S. Karaman 1952]) as well as shifted position of denticulated spines (H–I,II: N. salonitanus [after G. Karaman 1984a]). Setae below palmar spine are indicated with ps.
Figure 5. Caprella equilibra Say, 1818. Male gnathopod 1 and 2, pereopods 5–7 in Littoral caprellids (Crustacea: Amphipoda) from the Mexican Central Pacific coast, with the description of four new species
Figure 5. Caprella equilibra Say, 1818. Male gnathopod 1 and 2, pereopods 5–7, abdomen. Female abdomen. Scale bar: x (Gn2): 1 mm; y (Gn1): 0.3 mm; z (P5-7): 1 mm; w (Ad): 0.1 mm.
Figure 8. Caprella mendax Mayer, 1903. Male gnathopod 1 and 2, pereopods 5–7 in Littoral caprellids (Crustacea: Amphipoda) from the Mexican Central Pacific coast, with the description of four new species
Figure 8. Caprella mendax Mayer, 1903. Male gnathopod 1 and 2, pereopods 5–7, abdomen. Female abdomen. Scale bar: x (Gn1, Gn2): 0.3 mm; y (P5-7): 0.3 mm; z (Ad): 0.1 mm.
FIGURE 6. Gnathopods I and II in Molecular phylogeny of Niphargus boskovici (Crustacea: Amphipoda) reveals a new species from epikarst
FIGURE 6. Gnathopods I and II of N. zagorae sp. n.(a,d) and N. boskovici (b,c).
FIG. 1. Valettiopsis dentata, gnathopods 1–2. Holotype, 6 in Revision of the amphipod genus Valettiopsis Holmes, 1908 (Crustacea: Lysianassoidea), with the addition of three new species
FIG. 1. Valettiopsis dentata, gnathopods 1–2. Holotype, 6 mm male.
FIG. 2. Valettiopsis lincolni, gnathopods 1–2. Holotype, 17 in Revision of the amphipod genus Valettiopsis Holmes, 1908 (Crustacea: Lysianassoidea), with the addition of three new species
FIG. 2. Valettiopsis lincolni, gnathopods 1–2. Holotype, 17 mm male.
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