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Holectypoida (oral)
Holectypoida (oral)
Description With their round tests, non-petaloid ambulacra and central peristome they resemble their regular ancestors. The periproct at the posterior oral side is very large.
Length 33 mm; Middle Jurassic, Switzerland. Author Schultz, Heinke JPG file - 272.37 kB - 1 147 x 1 186 pixels added on 2005-02-23261 viewsTraits taxaDigital photo, part of species Holectypoida †checked Kroh, Andreas 2021-02-24Digital photo, part of species Holectypus depressus (Leske, 1778) †checked Kroh, Andreas 2021-02-24From reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke
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