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Echinodermata (echinoderms)
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Echinoidea (sea urchins)
Hemiphormosoma paucispinum (ambulacra + apical system)
Description
a. Aboral ambulacra: The pore-pairs in the primary plates are small in contrast to those in the demiplates; b. Oral ambulacra: The pore-pairs in the demiplates are small and in the primary plates entirely lacking. Pores in red; c. Part of apical system: The plates are small and scattered on the membrane.
b. Scale 4 mm, c. Scale 2 mm.
Author
Mortensen, Theodor
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Echinoidea taxa
Scan of drawing
Hemiphormosoma paucispinum
Mortensen, 1934
checked Kroh, Andreas 2021-02-24
From reference
Schultz, H. (2011). Sea urchins III: Worldwide regular de...
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© 2011 Mortensen, Theodor
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