by Mariusz A. Salamon, Sosnowiec
SALAMON, M.A. (2004): High-density populations of the Triassic
ophiuroid Aspiduriella similis (ECK) from the Holy Cross Mountains (central
Poland): a preliminary report. Freiberger Forschungshefte, C 502: Paläontologie,
Stratigraphie, Fazies (12): 1-14; Freiberg.
The benthic ophiuroid Aspiduriella similis (ECK) forms widely distributed, dense
concentrations in the Pelsonian part of the Triassic Lukowa Beds of the Holy Cross
Mountains. Within the described deposits population densities vary from a few
to even some hundreds of specimens per square meter. Measurements of the central
disks of analysed specimens from the Lukowa Beds show some distinct size modifications.
It was found that the size tends to decrease with increasing distance from the