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49 results for “megalopa”
Data set of dorsal halfed shield outlines of specimens of Meiura, from the publication "Morphological diversity in true and false crabs reveals a common middle ground – the megalopa phase"
<p>Data set, containing all reconstructed shield shapes, all from representatives of Meiura, included in the analysis of the manuscript "Morphological diversity in true and false crabs reveals a common middle ground – the megalopa phase". The data sheet, detailing data origin can be found in the supplementarty material of the publication.</p>
Figure 1b in Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae
Figure 1b. Ventral view of the megalopa of Uca uruguayensis. Only the setae of left pleopods are drawn in ventral view for clarity. Scale bar: 500 mm.
Figure 5 in Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae
Figure 5. Uca uruguayensis megalopa: (a) pleopods 1–4; (b) uropods and telson; (c) detail of plumose seta of pleopods; (d) detail of hooked seta of pleopod endopodites; (e) detail of plumose spines of telson. Scale bar: 300 mm (a, b); 75 mm (c, d, e).
Figure 3 in Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae
Figure 3. Uca uruguayensis megalopa: (a) mandible; (b) detail of palp showing multidenticulate and sparsely plumose setae; (c) maxillule; (d) detail of cuspidate seta; (e) maxilla; (f) detail of marginal setae of scaphognathite; (g) first maxilliped; (h) second maxilliped; (i) detail of plumodenticulate seta; (j) third maxilliped. Scale bar: 300 mm (a, c, e, g, h, j); 75 mm (b, d, f, i).
Figure 2 in Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae
Figure 2. Uca uruguayensis megalopa: (a) antennule; (b) detail of exopodite showing aesthetascs and sparsely plumose setae; (c) antenna. Scale bar: 300 mm (a, c); 75 mm (b).
Figure 4 in Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae
Figure 4. Uca uruguayensis megalopa: (a) right cheliped; (b) detail of chela teeth; (c) pereiopods 2–4; (d) detail of cuspidate spine of pereiopods 3–4; (e) fifth pereiopod; (f) modified hooked serrate seta of fifth pereiopod. Scale bar: 500 mm (a, c, e); 75 mm (b, d, f).
Figure 8 in Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations
Figure 8. Liocarcinus depurator, megalopa. (A, B) Abdomen, lateral and dorsal views, respectively; (C) first pleopod; (D) pleopod 4. Scale bars: 0.3 mm.
Figure 2 in Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations
Figure 2. Liocarcinus depurator, megalopa. (A) Antenna; (B) mandibular palp; (C) maxillule. Scale bars: 0.5 mm (A); 0.2 mm (B, C).
Figure 7 in Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations
Figure 7. Liocarcinus depurator, megalopa. (A–E) Pereiopods 1–5; (F) dactyl of the first pereiopod; (G) dactyl of pereiopod 5; (H) sternum. Scale bars: 0.5 mm.
Figure 1 in Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations
Figure 1. Liocarcinus depurator, megalopa. (A, B) Carapace, lateral and dorsal views, respectively; (C) antennule. Scale bars: 1 mm (A, B); 0.2 mm (C).
FIG. 10 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 10. — Colour photograph of a relatively large (carapace width estimated as between 7 and 8 mm) live megalopa stage of Bythograea thermydron Williams, 1980 collected from the East Pacific Rise (C. Epifanio and A. Dittel collection).
FIG. 9 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 9. — Megalopa stage of Bythograea, first and second antennae and sternal region: A, first antenna (antennule); B, second antenna; C, sternal region, anterior toward top of figure, with pereiopodal coxae indicated by dashed lines. Scale bars: 1 mm.
FIG. 8 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 8. — Megalopa stage of Bythograea, miscellaneous images: A, anterolateral region of carapace in dorsal view, white arrow indicating peritrichous ciliate (one of several found on carapace); B, higher magnification of ciliate marked by arrow in A; C, ventral view of left eyestalk and base of antenna; D, tip of endopod of second pleopod showing curved, interlocking serrate spines (cincinulli), disassociated in this view for clarity. Scale bars: A, 200 µm; B, 20 µm; C, 500 µm; D, 50 µm.
FIG. 6 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 6. — Megalopa stage of Bythograea, same individual as in Figure 1, selected appendages, abdomen, and telson: A, right cheliped, external view; B, dactylus of third pereopod,dorsal view; C, first pleopod, anterior view; D, fourth pleopod, anterior view; E, posterior two abdominal somites, telson, and uropods, dorsal view; F, ventral view of same region shown in E. Scale bars: A, 5 mm; B-F, 2 mm.
FIG. 7 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 7. — Megalopa stage of Bythograea, SEM photographs of chela and pereopods: A, anterior (outer) view of left chela; B, higher magnification of same appendage as in A showing details of chelipedal fingers; C, dactylus and distal region of propodus of fifth pereopod (walking leg); D, higher magnification of distal part of dactylus shown in C; note absence of curved serrate setae and serrate spines found in many other brachyuran megalopae. Scale bars: A, 1.0 mm; B, C, 0.5 mm; D, 200 µm.
FIG. 2 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 2. — Megalopa stage of Bythograea, selected SEM photographs of the carapace: A, anterior two thirds of carapace showing relative size of eyes, setal covering, and central protrusion (arrow); B, dorsal view of right anterolateral region of carapace and right chela; C, higher magnification of central carapace protrusion indicated by arrow in A; D, higher magnification of pappose setae from anterior dorsal region of carapace. Scale bars: A-C, 0.5 mm; D, 100 µm.
FIG. 4 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 4. — Megalopa stage of Bythograea, second and third maxillipeds: A, second maxilliped, outer view, left side; B, third maxilliped, inner view; C, third maxilliped and gill (detached), outer view. Scale bar: A, c. 1.5 mm; B, C, 2 mm.
FIG. 3 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 3. — Megalopa stage of Bythograea, mandibles, maxillae, and first maxilliped: A, outer (anterior) view (figure on left) and inner view of right mandible; paragnath shown only in outer view; B, first maxilla (maxillule), left side; C, second maxilla, left side; D, first maxilliped, inner view, left side; E, same appendage as D, outer view; arrow denotes serrate cleaning seta shown at higher magnification in Figure 5C and E. Scale bars: A-D, 1 mm; E not to scale.
FIG. 1 in The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)
FIG. 1. — Megalopa larval stage of a vent crab (Bythograea), entire specimen, dorsal view, based on a relatively large (carapace width 7.4 mm,carapace length 6.2 mm) specimen from the Epifanio and Dittel collection from the East Pacific Rise (Alvin Dive 3177). Scale bar: 10 mm.
Figure 1a in Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae
Figure 1a. Dorsal view of the megalopa of Uca uruguayensis. Scale bar: 500 mm.
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