Dacryoconarida is an extinct subclass of free living animals from the

Tentaculita Tentaculita is an extinct class of lophophorates ranging from the Early Ordovician to the Middle Jurassic. They were suspension feeders with a near worldwide distribution. For a more thorough discussion, see '' Tentaculites''. The presence of ...

class, which were common in the Devonian oceans (Fisher, 1962). Dacryoconarids have a subspherical, drop- or tear-shaped embryonic chamber (Farsan 2005). The phylogenetic affinities of tentaculites are not fully resolved; they have often been placed among

molluscs Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

, but recent microstructural analyses place them among the

Lophophorata The Lophophorata (also called Tentaculata; not to be confused with Tentaculata Eschscholtz 1825, a class within the Ctenophora) are a Lophotrochozoan clade consisting of the Brachiozoa and the Bryozoa Bryozoa (also known as the Polyzoa ...

. Their fossils are known from Devonian rocks of Australia, Asia, Europe, North Africa and North America.

References

* Farsan, N.M. 2005. Description of the early ontogenetic part of the Tentaculitids, with implications for classification. Lethaia 38: 255-270.

External links

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Dacryoconarida
at fossilworks {{Taxonbar, from=Q16953823 Tentaculita Devonian first appearances Devonian extinctions Protostome subclasses Prehistoric animal taxa Taxa described in 1962