Condylopygidae RAYMOND , 1913

Fatka, Oldřich, Knížek, František & Kozák, Vladislav, 2015, Condylopyge Hawle Et Corda, 1847 In The Příbram-Jince Basin (Barrandian Area, The Czech Republic, Agnostida), Acta Musei Nationalis Pragae Series B 71 (1 - 2), pp. 103-109 : 105

Family Condylopygidae RAYMOND, 1913

R e m a r k s. Like numerous earlier authors, we follow Kobayashi (1962) in recognizing the Condylopygoidea at the level of superfamily, while the family concept is that of Raymond (1913). Condylopygoidea differs from Agnostoidea M´COY, 1849 by (1) the characteristic expansion of the anterior glabellar lobe, (2) the apparent presence of occipital structures instead of basal lobes, (3) the presence of three anterior segments in an otherwise axiolobate pygidium, and (4) the supposed retention of a cephalothoracic aperture (see Rushton 1979, p. 45). Condylopygoidea are therefore the most distinctive members of the Agnostina (see Shergold et al. 1990, Shergold and Laurie 1997).