1,721,005 research outputs found
Nanhaipotamon Bott 1968
No full textNanhaipotamon Bott, 1968 (gure 4c, 6) Isolapotamon (Nanhaipotamon) Bott, 1968: 124. Nanhaipotamon: Bott, 1970b: 195; Dai and Chen, 1987: 30; Dai, 1997: 210.Published as part of Brandis, Dirk, 2002, On the taxonomic status and biogeography of the Isolapotamidae Bott, 1970 (Decapoda, Brachyura), pp. 1291-1339 in Journal of Natural History 36 (11) on page 1302, DOI: 10.1080/00222930110051743, http://zenodo.org/record/529852
Figure 3 in A new species of Himalayapotamon Pretzmann, 1966 (Crustacea: Brachyura: Potamidae) marking the westernmost distribution of the genus, with notes on its geographical range evolution
No full textFigure 3. Phylogenetic position of Himalayapotamon robertsianum sp. nov. as close relative of its geographically near congener, H. koolooense. Maximum clade credibility tree based on a 16S rRNA gene fragment and rooted with two Potamon species from Iran.Published as part of Klaus, Sebastian & Brandis, Dirk, 2019, A new species of Himalayapotamon Pretzmann, 1966 (Crustacea: Brachyura: Potamidae) marking the westernmost distribution of the genus, with notes on its geographical range evolution, pp. 2993-3004 in Journal of Natural History 52 (47-48) on page 3000, DOI: 10.1080/00222933.2019.1568603, http://zenodo.org/record/517815
Evolution of sperm morphology in potamid freshwater crabs (Crustacea: Brachyura: Potamoidea)
No full textKlaus, Sebastian, Brandis, Dirk (2011): Evolution of sperm morphology in potamid freshwater crabs (Crustacea: Brachyura: Potamoidea). Zoological Journal of the Linnean Society 161 (1): 53-63, DOI: 10.1111/j.1096-3642.2009.00625.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2009.00625.
On the taxonomic status and biogeography of the Isolapotamidae Bott, 1970 (Decapoda, Brachyura)
No full textFIG. 2. Second gonopod of Potamidae, Isolapotamidae and Sinopotamidae: morphology of the terminal tube. Note the diOEerences in tube construction. (a) Cross-section of terminal tube of Potamidae; (b) cross-section of terminal tube of Isolapotamidae; (c) cross-section of terminal tube of Sinopotamon. c.z., contact zone or fused zone; o.c., outer cuticle; t, tissue area; t.m., tube margin.Published as part of Brandis, Dirk, 2002, On the taxonomic status and biogeography of the Isolapotamidae Bott, 1970 (Decapoda, Brachyura), pp. 1291-1339 in Journal of Natural History 36 (11) on page 1296, DOI: 10.1080/00222930110051743, http://zenodo.org/record/529852
Figure 1 in Evolution of sperm morphology in potamid freshwater crabs (Crustacea: Brachyura: Potamoidea)
No full textFigure 1. Transmission electron microscopy (TEM) of potamid spermatozoa. A–E, Socotrapotamon socotrense. A, longitudinal sagittal view; the white line points to the perforate operculum. B, coenospermic spermatophore. C, cross section. D, electron-lucent ring around the opening of the perforatorial chamber. E, spermatophore wall. F–J, Potamon fluviatile. F, spermatophore wall. G, coenospermic spermatophore. H, longitudinal sagittal section (slightly transverse) and cleistospermic spermatophore. J, cross section. Scale bars: 1 Mm, or as indicated. Abbreviations: ar, acrosome ray zone; ia, inner acrosomal zone; nu, nucleus; oa, outer acrosomal zone; op, operculum; pc, perforatorial chamber; sw, spermatophore wall.Published as part of Klaus, Sebastian & Brandis, Dirk, 2011, Evolution of sperm morphology in potamid freshwater crabs (Crustacea: Brachyura: Potamoidea), pp. 53-63 in Zoological Journal of the Linnean Society 161 (1) on page 56, DOI: 10.1111/j.1096-3642.2009.00625.x, http://zenodo.org/record/575648
Figure 3 in Evolution of sperm morphology in potamid freshwater crabs (Crustacea: Brachyura: Potamoidea)
No full textFigure 3. Transmission electron microscopy (TEM) of potamid spermatozoa. A, B, Parathelphusula panningi. A, longitudinal sagittal view. B, cross section. C–F, Himalayapotamon emphysetum. C, longitudinal sagittal view; the arrowhead indicates the perforate operculum. D, 'tongue-and-groove' connection between the operculum and the acrosomal zones beneath. E, overview of cleistospermic spermatophores. F, cross section. Scale bars: 1 Mm, or as indicated. Abbreviations: arrowhead, vestigial 'tongue & groove connection'; ar, acrosome ray zone; ia, inner acrosomal zone; nu, nucleus; oa, outer acrosomal zone; op, operculum; pc, perforatorial chamber; tg, 'tongue-and-groove' connection; sw, spermatophore wall.Published as part of Klaus, Sebastian & Brandis, Dirk, 2011, Evolution of sperm morphology in potamid freshwater crabs (Crustacea: Brachyura: Potamoidea), pp. 53-63 in Zoological Journal of the Linnean Society 161 (1) on page 58, DOI: 10.1111/j.1096-3642.2009.00625.x, http://zenodo.org/record/575648
Nanhaipotamon formosanum
No full textNanhaipotamo n formosanum (Parisi, 1916) (gure 6a–c) Geothelphusa formosanum Parisi, 1916: 156, pl. 8, gure 1, textgure 2a; Balss, 1937: 168, gure 32. Isolapotamon (Nanhaipotamon) formosanum formosanum: Bott, 1968: 124, gure 9. Nanhaipotamo n formosana formosana: Bott, 1970b: 195, gure 8. Material. One, one (SMF 4507), Taiwan, Nantou, Chung-hsing Village, ded. J. K. Chia, ex coll. Tulane University collection; one (ZMB 12528), Taiwan, Kagi. Diagnosis. Terminal joint of rst gonopod dorsoventrally attened, broadly triangular in shape, formed by projection of mesial overlapping zone. Margins of mesial projection straight. Type locality. Taiwan. Distribution. Presently known only from Taiwan. Measurements. 34.2: 27: 18.8: 9.4 (ZMB 12528). Remarks. The species of Nanhaipotamon can be easily characterized by diOEerences in the shape of the rst male gonopod. The mesial projection of gonopod 1 has a typical triangular shape with straight margins, and Dai (1995) showed a large number of similar species with such triangular projections. However, according to the detailed drawings of Dai (1995), the species can be separated easily from each other by the shape of the margins of gonopod 1.Published as part of Brandis, Dirk, 2002, On the taxonomic status and biogeography of the Isolapotamidae Bott, 1970 (Decapoda, Brachyura), pp. 1291-1339 in Journal of Natural History 36 (11) on page 1304, DOI: 10.1080/00222930110051743, http://zenodo.org/record/529852
Isolapotamon anomalum
No full textIsolapotamon anomalum (Chace, 1938) (gure 5a–c) Potamon anomalum Chace, 1938: 14, pl. 2. Isolapotamon (Isolapotamon) anomalum: Bott, 1968: 120, gure 1. Isolapotamon anomalum: Bott, 1970b: 191, pl. 41, gure 77, pl. 56, gure 82; Ng and Tan, 1998: 56, gure 1A–D. Material. One, one (juv.) (NMB 944 a) Bundutuan, Luidan river, Kina-Balu, North Borneo, 3000 feet, exch. Cambridge; one (SMF 2839) Luidan river, Kinabalu, North Borneo. Diagnosis. Distal part of terminal joint of rst gonopod with a dorsoventrally attened, broadened terminal projection that is distinctly separated from the cone-like gonopodial opening. Type locality. Bundutan, Luidan river, Mt Kinabalu, North Borneo. Distribution. North Borneo, in the Luidan river at the Mount Kinabalu. Measurements. 35.7: 26.9: 17.2: 8.8 (SMF 2839). Remarks. Isolapotamon anomalum is one of a number of species of this genus in the Kinabalu area, which were revised by Ng and Tan (1998). Within these species Isolapotamon anomalum most closely resembles I. griswoldi (Chace, 1938) based on the shape of the distal part of the rst gonopod. In both species the distal extension of gonopod 1 is distinctly separate from the gonopodial cone-like opening but this distal extension is rounded and more or less thorn-like in I. griswoldi while it is broad and dorsoventrally attened in I. anomalum.Published as part of Brandis, Dirk, 2002, On the taxonomic status and biogeography of the Isolapotamidae Bott, 1970 (Decapoda, Brachyura), pp. 1291-1339 in Journal of Natural History 36 (11) on page 1302, DOI: 10.1080/00222930110051743, http://zenodo.org/record/529852
Figure 9 in The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda)
No full textFigure 9. Pleon-holding mechanism of a juvenile Potamon fluviatile (Herbst, 1785), ♂, 11 × 9 mm, Greece, (ZMK1555), marked on a 3D volume reconstruction of the cuticle, based on µCT images. (a) Specimen complete, telson and sixth pleon segment in natural position. Arrow indicates location of pleon-holding structures. (b) Telson and sixth pleon segment moved from reconstruction into small inset. Buttons (red) visible inside the sterno-abdominal cavity, arrow on inset indicates position of pleonal socket. Note cuticular ridge next to telson. Orange: telson; red: buttons; yellow: pleon segment 6. Scale bar = 2 mm.Published as part of Köhnk, Stephanie, Gorb, Stanislav & Brandis, Dirk, 2017, The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda), pp. 2087-2132 in Journal of Natural History 51 (35-36) on page 2100, DOI: 10.1080/00222933.2017.1355076, http://zenodo.org/record/518345
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