Palæos:		Brachiopoda
INVERTEBRATES		Siphonotretida

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Siphonotreta tertis (Walcott)
a, brachial and b pedicle valves
length about 5 mm
Furongian, Alberta.
image from Moore, Lalicker and Fischer, Invertebrate Fossils, McGraw-Hill Book Company Inc, 1952, p.224

The siphonotretids are another one of the many small early lineages of inarticulate brachiopods.   Both valves typically have obtuse-angle interareas and marginal apices. The pedicle opening is apical or in front of the apex of the pedicle valve (see above, right)

Life posture of Schizambon.  The pedicle opening is located between the apex of the pedicle valve and the shell margin.

Brachiopoda main page

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