Tegmen

From Palaeos

o Echinodermata
`--+--Echmatocrinus brachiatus
   `--o Crinoidea
      |--Aethocrinida
      `--+--Disparida
         `--+--Camerata
            `--Cladida (incl. Flexibilia and Articulata)

Definition

The ventral surface of the crinoid body that bears the mouth and confluent food grooves leading to the arms, as well as the anus. It may be covered by a noncalcareous integument or reinforced with ossicles and ambulacral and interambulacral plates.

References

• Moore, R. C., Lalicker, C. G. and A. G. Fischer, 1952, Invertebrate Fossils, McGraw-Hill Book Company, Inc., NY,
• Glossary of terms for Echinoderms

Credits

MAK061201