Diagnoza

The P1 elements with a transversely ribbed platform and a tendency to develop several ridges paralel to the carina. They run at a large angle to the element axis, ending approximately at the cusp level, either at the platform margin or in the middle of the platform lobe. In some specimens the posterior ridge continues further and approaches gently the platform margin. The tuberculation of the anterior lobe may be irregular or tubercles tend to be arranged in transverse rows.  Siphonodella quadruplicala (Branson & Mehl, 1934) (Branson & Mehl 1934, pI.24: 18-20, the lectotype selected by Klapper (1966: p. 17) and S. sexplicafa (Branson & Mehl, 1934) from the Bushberg Sandstone at Brickeys in St. Genevieve County of Missouri.

Porównanie

Autekologia

Występowanie geograficzne

Zasięg czasowy

Materiały muzealne

Literatura

Dzik, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170.