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Echinodermata (echinoderms)
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Echinoidea (sea urchins)
Echinosigra phiale (oral plate patterns)
Description
Changes of oral plate pattern during ontogeny. a. Specimen of c. 6 mm. This early stage closely resembles to that of Pourtalesia before ist plates become more and more stretched. b. Specimen of c. 13 mm. c. Specimen of c. 32 mm. The labral plate (1) is separated from the sternal plate (2) by one symmetrical pair of plates: respectively one plate of the posterior ambulacra AI and AV. There are distinct intra-plate lines on the very elongated central ambulacral plates. Modified after Gage (1984).
Author
Schultz, Heinke
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Echinoidea taxa
Scan of drawing
Echinosigra phiale
(Thomson, 1873)
represented as
Echinosigra (Echinosigra) phiale
(Thomson, 1873)
checked Kroh, Andreas 2021-02-24
From reference
Schultz, H. (2009). Sea urchins II: Worldwide irregular d...
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© 2009 Schultz, Heinke
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