Klapperilepis praetriangularis (Ziegler and Sandberg, 1988 )

Dzik, Jerzy, 2002, Emergence and collapse of the Frasnian conodont and ammonoid communities in the Holy Cross Mountains, Poland, Acta Palaeontologica Polonica 47 (4), pp. 565-650 : 607

Klapperilepis praetriangularis (Ziegler and Sandberg, 1988)

Holotype: SMF 38 572, Ziegler and Sandberg 1988: pl. 1: 1a, b.

Type horizon and locality: Latest Frasnian cephalopod limestone SW Hamar Laghdad near Erfoud, Morocco.

Emended diagnosis.—Relatively wide and short platform of P 1 (sp) elements, generalised appearance of M (ne) elements.

Remarks.—The species was originally defined typologically on the basis of a flat (instead of curved downward, as in the Frasnian species of Manticolepis , or raised, as in the Famennian P. triangularis ) dorsal part of the P 1 (sp) elements. In result, it is reported to occur as late as in the mid− P. triangularis Zone ( Wang 1994). Actually, this character is rather variable within both the late Frasnian and earliest Famennian samples. The main difference in respect to the type population of K. triangularis consists in less derived platform shape and apparatus structure.

Klapperilepis triangularis (Sannemann, 1955) Holotype: Sannemann (1955: pl. 24: 3).

Emended diagnosis.—Relatively elongated P 1 (sp) elements of otherwise generalised appearance, M (ne) elements with narrower angle between processes than in ancestral K. praetriangularis .