functions.php

<?php
add_action('init', 'type_post_turmas');
 
function type_post_turmas() { 
    $labels = array(
        'name' => _x('Turmas', 'post type general name'),
        'singular_name' => _x('Turma', 'post type singular name')
    );
 
    $args = array(
        'labels' => $labels,
	'public' => true,			
//	'register_meta_box_cb' => 'noticias_meta_box',
	'supports' => array('title','editor','thumbnail','comments', 'excerpt', 'custom-fields', 'revisions', 'trackbacks')
    );
 
    register_post_type( 'turmas' , $args );
    flush_rewrite_rules(); 
}