TY  - JOUR
A1  - Reitner, Joachim
A1  - Mehl, Dorte
T1  - Monophyly of the Porifera
Y1  - 1996
SP  - 5
EP  - 32
JF  - Verhandlungen des Naturwissenschaftlichen Vereins in Hamburg
DO  - 10.23689/fidgeo-2563
N2  - The monophyly of the Porifera is weil established. According to our hypothesis the Hexactinellida are the adelphotaxon of the Pinacophora (new taxon = Calcarea + Homoscleromorpha + Demospongiae). The Porifera are the adelphotaxon of the Eumetazoa/Placozoa. Sponge spicules are considered not to be a constituent character of the Porifera. Mineralized spicules developed independently within the three poriferan main taxa the Hexactinellida, Calcarea, and Demospongiae. Demospongian microscleres are not derived from megascleres in contrast to those of Hexactinellida. Accordingly, spicules probably developed several times within the Demospongiae. Remains of Porifera are known since the late Proterozoic.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6876
ER  -