The Echinoid Directory

Contributed by Andrew Smith, March 2008

Gagaria atacica Cotteau, 1892, p. 525

[Orthechinus atacica (Cotteau); Cotteau, 1894, p. 758.]

Diagnostic Features	Test depressed. Apical disc either dicyclic or with posterior oculars in contact with periproct; all genital plates similar in size. Ambulacral plating trigeminate; all three elements reaching the perradius but with the lowest element largest. Primary tubercle on each compound plate, straddling the lower two elements; the upper element bearing only small secondary tubercles. Pore-pairs uniserial throughout. Interambulacral plates with primary tubercle flanked by smaller secondary tubercles on adradial and interradial sides at ambitus and adorally. Tubercles imperforate and weakly crenulate. Peristome large, slightly sunken and with weak buccal notches. Spines and lantern unknown.
Distribution	Middle Eocene, France
Type	Holotype: University of Lyon Palaeontological Collections.
Classification and/or Status	Species of Gagaria
Remarks	Cotteau, G. 1892-1894. Paleontologie francaise. Terrains Tertiaires II. Eocene Echinoidea. G. Masson, Paris.