Parastachyocrinus Wanner, 1949

Ausich, William I., Križnar, Matija, Paszcza, Karolina, Hoşgör, İzzet, Płachno, Bartosz J. & Salamon, Mariusz A., 2024, Early Permian crinoids from Laurasia and their paleogeographic implications, Acta Palaeontologica Polonica 69 (3), pp. 447-466 : 455

publication ID

https://doi.org/10.4202/app.01159.2024

persistent identifier

https://treatment.plazi.org/id/03FAB824-FC22-FF9C-FF44-FC86FD44FA12

treatment provided by

Felipe

scientific name

Parastachyocrinus Wanner, 1949
status

 

Genus Parastachyocrinus Wanner, 1949

Type species: Erisocrinus malaianus Wanner, 1924 . Unknown series of Permian, Timor.

Included species: Parastachyocrinus granulatus ( Wanner, 1924) , Parastachyocrinus inflatus Wanner, 1949 ; Parastachyocrinus malaianus ( Wanner, 1924) , Parastachyo crinusobliquus ( Wanner, 1916), Parastachyocrinus ornatus Wanner, 1949 ; Parastachyocrinus wanneri sp. nov.; Parastachyocrinus sloveniaensis sp. nov.

Remarks. —Even with the revisions proposed herein, some morphological variability exists within species of Parastachyocrinus . Species diagnostic characters, as listed below for each species, are aboral cup symmetry, aboral cup shape, aboral cup outline in basal view, aboral cup plate sculpturing, degree of depression along the aboral cup sutures, presence or absence of a basal concavity, whether infrabasal plates are confined to the basal concavity, whether infrabasal plates are visible in lateral view, relative convexity of basal plates, presence or absence of spines or nodes on basal plates, radial plate convexity, and presence or absence of spines or nodes on radial plates.

Stratigraphic and geographic range. —Unknown series of Permian, Timor; Artinskian, Permian, Slovenia.

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