Pinnularia braunii v. amphicephala (A. Mayer) Hust.




Collection 1788

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Pinnularia braunii v. amphicephala (A. Mayer) Hust. in Pasch., Sussw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 319, fig. 587. 1930(Patrick and Reimer 1966).

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Valve linear or with slightly convex margins; apices rostrate-capitate. Axial area about one-fourth the breadth of the valve; widening toward the central area which is a broad, transverse fascia. Raphe filamentous; terminal fissures and terminal nodules distinct. Striae raditate at the center of the valve, convergent toward the ends(Patrick and Reimer 1966).

  • Type Locality
    ...aus einem Weiherabfluss bei Holzheim (Oberpfalz bei Klardorf) [Regensburg, Germany](Patrick and Reimer 1966).

  • Synonyms
    Pinnulara amphicephala A. Mayer, Dekschr. Bayer. Bot. Ges. Regensburg, 13(N.F. 7):136, pl. 2, figs. 15-16. 1917(Patrick and Reimer 1966).

  • Ecology
    Seems to prefer cool water of low mineral content. Found in a wide range of pH enviroments, in various habitats(Patrick and Reimer 1966; Beaver 1981) .

    Size ranges and morphology

  • Length is 48 to 55 micrometers (Patrick and Reimer 1966).
  • Width is 7 to 8 micrometers (Patrick and Reimer 1966).
  • Striae are 11 to 14 in 10 micrometers (Patrick and Reimer 1966).