Hederellid
superfamily of lophotrochs
Hederellids are extinct colonial animals with calcitic tubular branching exoskeletons. They range from the Silurian to the Permian and were most common in the Devonian period. They are more properly known as hederelloids because they were originally defined as a suborder by Bassler, who described about 130 species. Although they have traditionally been considered bryozoans, they are clearly not because of their branching patterns, lack of an astogenetic gradient, skeletal microstructure, and wide range in tube diameters. Work continues on assessing the true affinities of hederelloids, but they appear to be most closely related to phoronids and other lophophorates.
Classification
Family Hederellidae
Genus Diversipora
Genus Hederella
Family Reptariidae
Genus Cystoporella
Genus Hederopsis
Genus Hernodia
References
Further reading
Wilson, M. A.; Taylor, P. D. (2006). "Predatory drillholes and partial mortality in Devonian colonial metazoans". Geology. 34 (7): 565–568. Bibcode:2006Geo....34..565W. doi:10.1130/G22468.1.
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