Consulta:
SELECT idcategoria, titulo FROM `articulo-categoria` ORDER BY idcategoria ASC

Error MySQL:
Table 'calasanz_principal.articulo-categoria' doesn't exist

DebugTrace:
#0  Conexion->consultar(
            SELECT idcategoria, titulo FROM `articulo-categoria` ORDER BY idcategoria ASC
      ) called at [/home2/calasanz/public_html/sitemap.php:19]