CLASSIFICATION OF CLATHRINA OR OLYNTHUS

PHYLUM :- PORIFERA (Pore bearing, cellular grade, asymmetrical or radially symmetrical.)

CLASS :- CALCAREA (Calcareous spicules present.)

ORDER :- CLATHRINIDA (Canal system of ascon type. )

FAMILY :- CLATHRINIDAE

GENUS :- Clathrina

GEOGRAPHICAL DISTRIBUTION

Distributed from Matha’s vineyard to Gulf of St. Lawrence. From Casco bay to Arctic ocean and common in Europe.

HABIT AND HABITAT

Clathrina is a simple, marine sponge attached to rocks or substratum.

CLATHRINA OR OLYNTHUS

GENERAL CHARACTERSTICS OF CLATHRINA OR OLYNTHUS

  • Originally it was presumed as adult and was called as Olynthus, but now it is known to represent the late developmental stage of some sponge. 
  • Sedentary sponge with a free end containing osculum.
  • Spongocoel opens through the osculum.
  • Body is cylindrical and perforated by various ostia. 
  • The skeleton contains spicules in the form of triactines and/or tetractines, sometimes with diactines, tripods and tetrapods as well.
  • Development is complicated.
  • The choanoderm is usually flat, never forming folds when the sponge is extended.
CLATHRINA OR OLYNTHUS

IDENTIFICATION

The animal has broad anterior, portion with osculum, ostia and narrow posterior portion attached to substratum and all above characters, hence it is Clathrina.

CLATHRINA OR OLYNTHUS
CLATHRINA OR OLYNTHUS
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