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1,015 results for “West Africa”
FIGURE 7 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 7. Palaemon powelli sp. nov., male paratype NHM1980.325b. A. First pleopod, endopod. B. Second pleopod, endopod. C. Appendices masculina and interna. Scale bar indicates 0.5 mm (A-B) or 0.25 mm (C).
FIGURE 6 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 6. Palaemon powelli sp. nov., paratype NHM1980.325c. A. Third pereiopod. B. Same, dactylus. C. Fifth pereiopod. D. Same, dactylus. Scale bar indicates 1 mm (A), 0.7 mm (C) or 0.35 m (B, D).
FIGURE 8 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 8. Palaemon powelli sp. nov., rostral variation NHM1980.325d. A. Ov. female, pocl 4.6. B. Ov. female, pocl 5.0. C. Ov. female, pocl 4.6. D. Female, pocl 3.0. E. Female, pocl 3.4. F. Female (pocl 3.5). Scale bar indicates 1 mm.
FIGURE 5 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 5. Palaemon powelli sp. nov., paratype NHM1980.325c. A. First pereiopod. B. Second pereiopod. C. Same, chela. D. Second pereiopod, chela, proximal. E. Same, distal. Scale bar indicates 1 mm (A, C), 0.7 mm (B) or 0.35 m (D, E.).
FIGURE 4 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 4. Palaemon powelli sp. nov., paratype NHM1980.325c. A. Mandible. B. Third maxilliped. C. Antennular peduncle, mesial view. D. Antennular flagella, proximal part. E. Telson. F. Same, distal part. Scale bar indicates 1 mm (B-E), 0.8 mm (A) or 0.5 mm (F).
FIGURE 3 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 3. Palaemon powelli sp. nov., A. Carapace. B. Frontal region, lateral. C. Same, eye removed. D. Abdomen. E. Sixth pleonite. F. Antennal peduncle and scaphocerite. A-E holotype NHM1980.325a, F paratype NHM1980.325c. Scale bar indicates 2 mm (D), 1 mm (E-F), 0.8 mm (A, C) or 0.5 mm (B).
FIGURE 2 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 2. Palaemon maculatus (Thallwitz). Bonny River, Nigeria, ov. female (pocl 6.8). USNM 181904. A. First pereiopod. B. Second pereiopod. C. Same, chela. D. Third pereiopod. E. Same, dactylus. F. Fourth pereiopod. G. Fifth pereiopod. Scale bars indicate 1 mm (B, D, F–G), 0.7 mm (A), 0.5 mm (C) or 0.35 mm (E).
FIGURE 1 in A new species of Palaemon (Crustacea, Decapoda, Palaemonidae) from West Africa, with a re-description of Palaemon maculatus (Thallwitz, 1892)
FIGURE 1. Palaemon maculatus (Thallwitz). Bonny River, Nigeria. USNM 181904. A. Frontal region, lateral. B. Same, eye removed. C. Abdomen, lateral view. D. Sixth pleonite, lateral view. E. Telson, distal part. F. Antennule. G. mandible. H. First pleopod, male. I. Second pleopod, male. J. Appendices masculina and interna. A–G ovigerous female, pocl 6.8; H–J male, pocl 4.8. Scale bars indicate 2 mm (A, C), 1 mm (B, D, F, H, I), 0.5 mm (J), 0.35 mm (E) or 0.25 mm (G).
FIGURE 3 in Notes on chydorid endemism in continental Africa: Matralona gen. n., a monotypic Alonine from the Fouta Djalon Plateau (Guinea, West Africa) (Crustacea: Cladocera: Anomopoda)
FIGURE 3. Position of sixth limb in Matralona simoneae (Dumont, 1981). Abbreviations: ant, anterior; fg, food groove; P3−6, third to sixth limb; pa, postabdomen; post, posterior.
FIGURE 2 in Notes on chydorid endemism in continental Africa: Matralona gen. n., a monotypic Alonine from the Fouta Djalon Plateau (Guinea, West Africa) (Crustacea: Cladocera: Anomopoda)
FIGURE 2. Matralona simoneae (Dumont, 1981) gen. n.= Alona simonei Dumont, 1981, Samba Diallo, Guinée, 22.IV.1980. A. First maxilla; B. First limb; C. Idem, epipodite; D. Idem, ODL and IDL; E. Second limb; F. Idem, seventh scraper; G. Idem, gnathobase; H. Third limb, exopodite; I. Idem, without setules; J. Third limb, endite; K. Idem, gnathobase; L. Fourth limb, exopodite; M. Fourth limb, endite; N. Idem, flaming torch setae and gnathobasic seta; O. Fifth limb; P. Sixth limb, frontal view; Idem, lateral view in situ. Abbreviations: as, accessory seta; ds, dorsal seta; eh, ejector hooks; en, endite; ex, exopodite; ep, epipodite; fc, filter comb; gn, gnathobase; IDL, inner distal lobe; il, inner lobe; ODL, outer distal lobe; pep, pre-epipodite; pr, process; s, sensillum.
FIGURE 1 in Notes on chydorid endemism in continental Africa: Matralona gen. n., a monotypic Alonine from the Fouta Djalon Plateau (Guinea, West Africa) (Crustacea: Cladocera: Anomopoda)
FIGURE 1. Matralona simoneae (Dumont, 1981) gen. n. = Alona simonei Dumont, 1981, Samba Diallo, Guinée, 22.IV.1980. A. Habitus; B. Idem; C. Head pores; D. Posteroventral corner and denticles; E. Antennule; F. Antenna; G. Labral keel; H. Postabdomen; I. Lateral fascicle and marginal denticle in postanal portion.
FIGURE 5. The two-pored Matralona gen. n in Notes on chydorid endemism in continental Africa: Matralona gen. n., a monotypic Alonine from the Fouta Djalon Plateau (Guinea, West Africa) (Crustacea: Cladocera: Anomopoda)
FIGURE 5. The two-pored Matralona gen. n. and Armatalona Sinev, 2004. Both genera show similarities in external and limb morphology and may derive from a close common ancestor (or another result of homoplasy?). Both genera have the general appearance of small-sized Aloninae and previously belonged to Alona Baird, 1843. Top. Matralona simoneae (Dumont, 1981), Fouta Djalon, Guinea. Labral keel is completely exposed when compared to Armatalona. Below. Armatalona macrocopa (Sars, 1894), Australia. The spine-like antennal setae above the head are typical for the genus (Sinev 2004).
FIGURE 4 in Notes on chydorid endemism in continental Africa: Matralona gen. n., a monotypic Alonine from the Fouta Djalon Plateau (Guinea, West Africa) (Crustacea: Cladocera: Anomopoda)
FIGURE 4. Distribution of Matralona gen. n. and closest morphological relative Armatalona Sinev, 2004 suggest an Australasian-West African disjunction. Likely the result of a long isolation, Matralona gen. n. is the only of its kind in Africa. No close relatives are known from the continent. Relation with A. freyi Idris & Fernando, 1981 is preliminary. Not enough is known about this species.
FIGURE 9 in A new tree-frog genus and species from Ivory Coast, West Africa (Amphibia: Anura: Hyperoliidae)
FIGURE 9. NJ, ML, MP and Bayesian trees based on 1324 bp of partial sequences of 16S, 12S and cyt b for various hyperoliid genera with Leptopelis, Astylosternus, Boophis and Mantidactylus as outgroups; only support values ≥70% in NJ, MP and ML trees and ≥95% in the Bayesian tree are shown; support values in the ML tree refer to 100 bootstrap replicates (above) and 100,000 puzzle steps (below), respectively
FIGURE 7 in A new tree-frog genus and species from Ivory Coast, West Africa (Amphibia: Anura: Hyperoliidae)
FIGURE 7. Sonogram and waveform of advertisement calls of Morerella cyanophthalma sp. nov. White noise in basic frequencies is due to the noise of the climate chamber where the frogs were kept.
FIGURE 4 in A new tree-frog genus and species from Ivory Coast, West Africa (Amphibia: Anura: Hyperoliidae)
FIGURE 4. Volume rendering of X-ray microtomography of a male Morerella cyanophthalma sp. nov. skull (MNHG 3121-36) in dorsal (a), ventral (b), lateral (c), anterior (d) and posterior view (e).
FIGURE 6 in A new tree-frog genus and species from Ivory Coast, West Africa (Amphibia: Anura: Hyperoliidae)
FIGURE 6. Pectoral girdle and vertebral column of adult male Morerella cyanophthalma sp. nov. Pectoral apparati of SMNS 11940 (a: drawing after clearing and staining) and MNHG 3121-36 (b: scan). Vertebral column (scan of MHNG 3121-36) in dorsal (c) and ventral (d) view. CL = clavicle, CO = coracoid, ECO = epicoracoid, OM = omnosternum, ST = sternum; scale bar = 1mm.
FIGURE 3 in A new tree-frog genus and species from Ivory Coast, West Africa (Amphibia: Anura: Hyperoliidae)
FIGURE 3. Life adult female (above) and males (below) Morerella cyanophthalma sp. nov. from Banco National Park, Ivory Coast (top and bottom right: photo by Dieter Mahsberg).
FIGURE 2 in A new tree-frog genus and species from Ivory Coast, West Africa (Amphibia: Anura: Hyperoliidae)
FIGURE 2. Right hand (a, b), finger-tip (c), foot (e) and toe-tip (f) and left hand (d) and foot (g) of adult male Morerella cyanophthalma sp. nov. (a, b, c, e, f: scans of MHNG 2131.36, paratype; d, g: drawings of MHNG 2131.44, holotype); scale bar = 10 mm.
FIGURE 1 in A new tree-frog genus and species from Ivory Coast, West Africa (Amphibia: Anura: Hyperoliidae)
FIGURE 1. Variation in gular gland size of adult male Morerella cyanophthalma sp. nov. Top left: MHNG 2131.43, SVL: 29.0 mm; top right: MHNG 2131.44 (holotype), SVL: 30.1 mm; bottom left: MHNG 2131.41, SVL: 24.8 mm; bottom right MHNG 2131.51, SVL: 27.1 mm; scale bar = 10 mm.
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