Trilobite - Olenus

                             TRILOBITE 

NAME OF THE GENUS : OLENUS 

 BIO STATUS 

  1) PHYLUM : ARTHROPODA

  2) CLASS     : TRILOBITA 

  3) ORDER    : OPISTHOPARIA 

SHAPE & SIZE OF

THE BODY CEPHALON :

                              Oval, about 3 cm. 

SHAPE : 

             Rectangular with a narrow border wider than the rest of the body. 

GLABELLA : 

             Sub - rectangular, often slightly tapering glabella not reaching the anterior border with 3 pairs of furrows. 

FACIAL SUTURE & CHEEKS : 

              Opisthoparian ; fixed cheek broad. 

EYES : 

          Connected by eye ridge to the front of the glabella. 

GENAL ANGLE : 

            With genal spines continuation of free cheek. 

THORAX : 

            13 to 15 free segments, spinose, with rather flat pleasure and narrow facets. 

PYGIDIUM : 

           Small triangular, segments fused. 

SPECIAL CHARACTERS : 

           Oval body ; rectangular Cephalon ; opisthoparian, eyes connected by a ridge with glabella, short genal spines, free glabellar field present ; 13 to 15 thoracic free spiny segments; pygidium small.