South American Naiades : a contribution to the knowledge of the freshwater mussels of South America . saw the real hook, and that he simply took the point of thelower margin of the glochidium for it. This Hyriine hook (Fig. 4, b, c, d, e, f, h, k, I, m) differs entirely from the Ano-dontine hook. The latter is triangular, attached by a broad base to the point ofthe lower margin, and carries upon its upper surface a number of fine Hyriine hook is long and narrow, spiniform, with very narrow base, articulatedto the point of the lower margin, and without any spinules on the upper fac
South American Naiades : a contribution to the knowledge of the freshwater mussels of South America . saw the real hook, and that he simply took the point of thelower margin of the glochidium for it. This Hyriine hook (Fig. 4, b, c, d, e, f, h, k, I, m) differs entirely from the Ano-dontine hook. The latter is triangular, attached by a broad base to the point ofthe lower margin, and carries upon its upper surface a number of fine Hyriine hook is long and narrow, spiniform, with very narrow base, articulatedto the point of the lower margin, and without any spinules on the upper face, andfurthermore has a peculiar S-shaped curve. It is perfectly clear that this hook is different from that found in the genusUnio and the Anodoniinw. Functionality it may serve the same piu-pose, that of ortmann: south American naiades. 469 forming attachment to fishes, but we have not the slightest direct evidence of this,and Von Ihering directly questions it (/. c, p. 47). ]Mori)hologically this organ hasbeen independently developed. It is analogous to the Anodontine hook, but Fig. 4. Glochidia of Hyriiiiir, enlarged fifty times (drawn fiom photdgraplis). a. Dijdodon hasemani Ortmann (Rio Guapord), from specimen No. fl. Cat. No. b. D. imitator Ortmann (Santa Maria), from specimen No. 22. Cut. No. ()1.!)24S. c. D. simillimus Ortmann (Morretes), from specimen No. 2. Cat. No. ) d. D. vicarius Ortmann (Aqua (Jiiente), from spocimon No. 9. Cat. No. (shell of this specimen fisured on Plate XXXVI, fig. 2). e. D. decipicns Ortmann (Serrinlia), from specimen No. 10. Cat. No. /. /). pauliifta (Von Ihering) (Mogy Mirim), from sixcimcn No. 10. Cat. No. 01, D. rharrunnus (DOrhigny) (Santa Isabel), from specimen No. 5. Cat. No. I), (Lea) (Uruguayana), from specimen No. 1. Cat. No. /. D. hildir Ortmann (Cachoeira), from specimen No. c. Cat. No. /?. /). mogt/mirim Ortmann (Mogy Mirini), from s
Size: 1373px × 1821px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidsouthamerica, bookyear1921
