CLASSIFICATION OF LUCERNARIA

PHYLUM :- COELENTRATA (Tissue grade, diploblastic and acoelomate. )

CLASS :- SCYPHOZOA (Medusa well developed, hydroid reduced.)

ORDER :- STAUROMEDUSAE (Gastrovascular septa present-Two kinds of nematocysts are present katrichous isorhizas and microbasic heterotrichous euryteles.)

GENUS :- Lucernaria

GEOGRAPHICAL DISTRIBUTION

  • It is found in India; Crusade Islands, America Cape Cod to Greenland (USA) and Europe.

HABIT AND HABITAT

  • Lucemaria is sessile, sedentary and marine animal. It is inhabitant of bays, coastal waters mostly in colder parts.

LUCERNARIA

GENERAL CHARACTERSTICS OF LUCERNARIA

  • Lucemaria and its allied genera can be compared to sexual scyphistomes as persistent larval forms.
  • It is a small sessile scyphozoan with a polypoid, goblet or trumpet-shaped body that flares at the oral end into a broad concave sub-umbrella and tapers aborally into a long or short stalk or peduncle. 
  • Peduncle is attached temporarily to sea-weeds by foot gland. 
  • Umbrellar margin is divided into 8 prominent, short hollow, adhesive lobes or arms. 
  • Each arm possesses a cluster of short, knobbed adhesive tentacles at its end.
  • Mouth is cruciform (four-cornered) with small oral lobes and a short manubrium.
  • Internally gastrovascular system consists of a central stomach and four per radial pouches divided by inter-radial septa.
  • There are several gastric filaments Gonads are band-like, borne on septa. Marginal statorhabs or anchors, velum and tentaculocysts are absent. 
  • It breeds in all seasons. Sex cells are ejected through mouth.
LUCERNARIA

IDENTIFICATION

  • The animal contains 8 prominent arm and all above features, hence it is Lucernaria.
LUCERNARIA
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