TY - JOUR
T1 - Re-evaluation of the Palasteriscidae Gregory, 1900, and the early phylogeny of the Asteroidea (Echinodermata)
AU - Blake, D. B.
PY - 1994
Y1 - 1994
N2 - Foliaster transversus n.gen. and sp. (Echinodermata: Asteroidea) is assigned to the Ordovician through Devonian family Palasteriscidae. Platanaster is redescribed; both it and Foliaster are thought to have been suspension feeders that extended their arms into the water column. Ampullar basins in both were external; there are no podial pores. The strongly petaloid arm of Foliaster with widely separated podial basins is unique. Two competing phylogenies have been offered for the origin of stelleroids, one treating edrioasteroids as ancestral, the other favoring crinoids. In the latter hypothesis, the Palasteriscidae is the primitive asteroid family, and Platanaster is an example of the first true asteroids. -from Author
AB - Foliaster transversus n.gen. and sp. (Echinodermata: Asteroidea) is assigned to the Ordovician through Devonian family Palasteriscidae. Platanaster is redescribed; both it and Foliaster are thought to have been suspension feeders that extended their arms into the water column. Ampullar basins in both were external; there are no podial pores. The strongly petaloid arm of Foliaster with widely separated podial basins is unique. Two competing phylogenies have been offered for the origin of stelleroids, one treating edrioasteroids as ancestral, the other favoring crinoids. In the latter hypothesis, the Palasteriscidae is the primitive asteroid family, and Platanaster is an example of the first true asteroids. -from Author
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U2 - 10.1017/S0022336000025646
DO - 10.1017/S0022336000025646
M3 - Article
AN - SCOPUS:0028255423
SN - 0022-3360
VL - 68
SP - 123
EP - 134
JO - Journal of Paleontology
JF - Journal of Paleontology
IS - 1
ER -