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Agastograptus from the mulde beds of Gotland

100%

Kozlowska-Dawidziuk A.

Acta Palaeontologica Polonica

1991

tom 36

nr 2

Agastograptus lawsoni (Holland, Rickards et Warren 1969), known previously as Holoretiolites (Balticograptus) lawsoni Holland, Rickards et Warren 1969 from upper Wenlock of Shropshire is described from Mulde Beds of Gotland. A new diagnosis of the species, basing on abundant and well preserved fossils, has been formulated. Former Retiolites balticus Eisenack is removed from the genus Agastograptus.

Agastograptus, a synonym of Plectograptus [Retiolitidae, Graptolithina]

84%

Kozlowska-Dawidziuk A.

Acta Palaeontologica Polonica

2002

tom 47

nr 3

Agastograptus robustus Obut and Zaslavskaya, 1983, the type species of the genus Agastograptusis herein recognized as a species of Plectograptus. Large proximal lateral orifices are one of the significant characters of Plectograptus. P. robustus differs from the type species, Plectograptus macilentus Törnquist, 1887, in possessing paired apertural processes. Other species of Agastograptus have been assigned to three different genera: Spinograptus, S. clathrospinosus (Eisenack, 1951), S. munchi (Eisenack, 1951), Neogothograptus, N. balticus (Eisenack, 1951), and Cometograptus, C. nevadensis (Berry and Murphy, 1975). The main diagnostic feature used for Agastograptus, the spinoreticular paired apertural processes, is recognized as a species feature, characteristic mostly for Spinograptus, whereas the generic features are the arrangement of the proximal end, ventral walls, and ancora sleeve of the rhabdosome. Therefore the genus Agastograptus is a synonym of Plectograptus.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

2 Kozlowska-Dawidziuk A.

1 2002

1 1991

Wyniki wyszukiwania

Agastograptus from the mulde beds of Gotland

Agastograptus, a synonym of Plectograptus [Retiolitidae, Graptolithina]