Agastograptus, a synonym of Plectograptus [Retiolitidae, Graptolithina]

• Autorzy: Kozlowska-Dawidziuk A
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

Agastograptus robustus; synonym; Retiolitidae; Graptolithina; Silurian; Agastograptus; taxonomy; Plectograptus; paleontology

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2002
• Tom: 47
• Numer: 3
• Opis fizyczny: p.459-467,fig.

Twórcy

autor

Kozlowska-Dawidziuk A

• Polish Academy of Sciences, Twarda 51-55, 00-818 Warsaw, Poland

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